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| TK716xx LOW DROPOUT VOLTAGE REGULATOR FEATURES s s s s s s s s s s Available in 2.0 % or 1.0 % Output Tolerance Active High On/Off Control Very Low Quiescent Current Very Low Dropout Voltage Reverse Bias Protection Miniature Package (SOT23-5) Short Circuit Switch High Ripple Rejection Very High Output Impedance (Output Off) Very Low Noise APPLICATIONS s s s s s s s s s Battery Powered Systems Cellular Telephones Pagers Personal Communications Equipment Portable Instrumentation Portable Consumer Equipment Radio Control Systems Toys Low Voltage Systems DESCRIPTION The TK716xx is a low dropout linear regulator housed in a small SOT23-5 package, rated at 500 mW. The phase compensation in the IC has been optimized to allow the use of ceramic or tantalum output capacitors. The device is in the "on" state when the control pin is pulled to a logic high level. An internal PNP pass transistor is used to achieve a low dropout voltage of 90 mV (typ.) at 50 mA load current. This device offers high precision output voltage of 2.0 % or 1.0 %. The low quiescent current and dropout voltage make this part ideal for battery powered applications. This part incorporates an output disconnect feature to reduce the reverse bias current in the "off" state to less than 50 nA. The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode, saving cost and board space. The high 60 dB ripple rejection (400 Hz) and low noise provide enhanced performance for critical applications. An external capacitor can be connected to the noise bypass pin to lower the output noise level to 30 Vrms. TK716xx VIN GND CONTROL VOUT 20 P ORDERING INFORMATION NOISE BYPASS TK716 TK716 TK716 Voltage Code Capacitor Code Package Code VOLTAGE CODE* 13 = 1.3 V 14 = 1.4 V 15 = 1.5 V 16 = 1.6 V 17 = 1.7 V 18 = 1.8 V 19 = 1.9 V 20 = 2.0 V 21 = 2.1 V 22 = 2.2 V 23 = 2.3 V 24 = 2.4 V 25 = 2.5 V 26 = 2.6 V *Check Table 4 for availability. SCL SIL SCL H Tolerance Code Tape/Reel Code Temp. Code TAPE/REEL CODE 41 = 4.1 V 42 = 4.2 V 43 = 4.3 V 44 = 4.4 V 45 = 4.5 V 46 = 4.6 V 47 = 4.7 V 48 = 4.8 V 49 = 4.9 V 50 = 5.0 V 51 = 5.1 V 52 = 5.2 V 53 = 5.3 V 54 = 5.4 V L: Tape Left VIN BLOCK DIAGRAM VOUT CONTROL CIRCUIT CONSTANT CURRENT SOURCE THERMAL AND OVERCURRENT PROTECTION BANDGAP REFERENCE DISCONNECT CIRCUIT 27 = 2.7 V 28 = 2.8 V 29 = 2.9 V 30 = 3.0 V 31 = 3.1 V 32 = 3.2 V 33 = 3.3 V 34 = 3.4 V 35 = 3.5 V 36 = 3.6 V 37 = 3.7 V 38 = 3.8 V 39 = 3.9 V 40 = 4.0 V TEMPERATURE CODE C: Standard Temp. Range I: Extended Temp. Range CONTROL + PACKAGE CODE S: SOT23-5 TOLERANCE CODE H: 1 % Output Voltage Tolerance (Not available in I temp code) CAPACITOR CODE None: Ceramic Capacitor A: Tantalum Capacitor GND NOISE BYPASS December 1999 TOKO, Inc. Page 1 TK716xx ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................... 16 V Power Dissipation (Note 1) ................................ 500 mW Reverse Bias Voltage ................................................. 6 V Control Terminal Voltage ......................................... 12 V Noise Bypass Terminal Voltage ................................. 5 V Operating Voltage Range ............................... 1.8 to 12 V Storage Temperature Range ................... -55 to +150 C Operating Temperature (Ambient) Range TK716xx SCL, TK716xx SCLH ............ -30 to +80 C TK716xx SIL .......................................... -40 to +85 C Junction Temperature (Operating) ........................ 125 C Junction Temperature (Shutdown) ........................ 150 C Lead Soldering Temperature (10 s) ...................... 235 C TK716xx SCL AND TK716xx SCLH ELECTRICAL CHARACTERISTICS Test conditions: VIN = VOUT(TYP) + 1 V, TA = 25 C, unless otherwise specified. SYMBOL IQ ISTBY IREV IGND IOUT IOUT(PULSE) VOUT VOUT /T Line Reg PARAMETER Quiescent Current Standby Current Reverse Bias Current GND Pin Current Continuous Output Current Pulse Output Current Output Voltage Temperature Coefficient Line Regulation TEST CONDITIONS IOUT = 0 mA, Excluding ICONT VIN = 8 V, Output OFF (VCONT 0.15 V) VIN = 0 V, VREV = 5 V, Output OFF IOUT = 50 mA MIN TYP 70 MAX 100 0.1 UNITS A A nA mA mA mA V ppm/ C 1 1 50 1.8 150 10 ms pulse, Duty Cycle = 40 % VIN = VOUT(TYP) + 1 V, IOUT = 5 mA 200 See Table 1 and 2 20 VIN = VOUT(TYP) + 1 V to VOUT(TYP) + 6 V 1 mA < IOUT < 50 mA 2 4 7 12 90 140 15 18 28 50 160 230 300 350 mV mV mV mV mV mV mV mV V Load Reg Load Regulation 1 mA < IOUT < 100 mA 1 mA < IOUT < 150 mA IOUT = 50 mA VDROP Dropout Voltage IOUT = 100 mA IOUT = 150 mA VOUT 2.4 V VOUT < 2.4 V 200 200 1.26 Vref Noise Bypass Terminal Voltage CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) Control Current Control Voltage ON Control Voltage OFF VOUT = 1.6 V, Output ON Output ON Output OFF 1.6 0.6 10 A V V Note 1: Power dissipation is 500 mW when mounted as recommended. Derate at 4.0 mW/C for operation above 25 C. Gen Note: Exceeding the "Absolute Maximum Ratings" may damage the device. Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 C. Gen Note: Ripple rejection is @ 60 dB when f = 400 Hz, CL = 10 F, CN = 0.1 F, input noise = 100 mVrms, VIN = VOUT(TYP) + 1.5 V and IOUT = 30 mA. Gen Note: Output noise is 0.13 ~ 0.23 V/ Hz at 1 kHz when CN = 0.1 F. Page 2 December 1999 TOKO, Inc. TK716xx TK716xx SCL ELECTRICAL CHARACTERISTICS TABLE 1 Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 C, unless otherwise specified. Output Voltage 1.3 V 1.4 V 1.5 V 1.6 V 1.7 V 1.8 V 1.9 V 2.0 V 2.1 V 2.2 V 2.3 V 2.4 V 2.5 V 2.6 V 2.7 V 2.8 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V Voltage Code 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 VOUT(MIN) 1.240 V 1.340 V 1.440 V 1.540 V 1.650 V 1.740 V 1.870 V 1.940 V 2.040 V 2.140 V 2.240 V 2.340 V 2.440 V 2.540 V 2.640 V 2.740 V 2.840 V 2.940 V 3.038 V 3.136 V 3.234 V VOUT(MAX) 1.360 V 1.460 V 1.560 V 1.660 V 1.760 V 1.860 V 1.960 V 2.060 V 2.160 V 2.260 V 2.360 V 2.460 V 2.560 V 2.660 V 2.760 V 2.860 V 2.960 V 3.060 V 3.162 V 3.264 V 3.366 V Output Voltage 3.4 V 3.5 V 3.6 V 3.7 V 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V 4.7 V 4.8 V 4.9 V 5.0 V 5.1 V 5.2 V 5.3 V 5.4 V Voltage Code 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 VOUT(MIN) 3.232 V 3.430 V 3.528 V 3.626 V 3.724 V 3.822 V 3.920 V 4.018 V 4.116 V 4.214 V 4.312 V 4.410 V 4.508 V 4.606 V 4.704 V 4.802 V 4.900 V 4.998 V 5.096 V 5.194 V 5.292 V VOUT(MAX) 3.468 V 3.570 V 3.672 V 3.774 V 3.876 V 3.978 V 4.080 V 4.182 V 4.284 V 4.386 V 4.488 V 4.590 V 4.692 V 4.794 V 4.896 V 5.008 V 5.100 V 5.202 V 5.304 V 5.406 V 5.508 V TK716xx SCLH ELECTRICAL CHARACTERISTICS TABLE 2 Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 C, unless otherwise specified. Output Voltage 2.0 V 2.1 V 2.2 V 2.3 V 2.4 V 2.5 V 2.6 V 2.7 V 2.8 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V 3.4 V 3.5 V 3.6 V 3.7 V Voltage Code 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 VOUT(MIN) 1.960 V 2.060 V 2.160 V 2.260 V 2.360 V 2.460 V 2.560 V 2.660 V 2.760 V 2.860 V 2.960 V 3.060 V 3.160 V 3.260 V 3.360 V 3.460 V 3.560 V 3.660 V VOUT(MAX) 2.040 V 2.140 V 2.240 V 2.340 V 2.440 V 2.540 V 2.640 V 2.740 V 2.840 V 2.940 V 3.040 V 3.140 V 3.240 V 3.340 V 3.440 V 3.540 V 3.640 V 3.740 V Output Voltage 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V 4.7 V 4.8 V 4.9 V 5.0 V 5.1 V 5.2 V 5.3 V 5.4 V Voltage Code 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 VOUT(MIN) 3.760 V 3.860 V 3.960 V 4.059 V 4.158 V 4.247 V 4.356 V 4.455 V 4.554 V 4.653 V 4.752 V 4.851 V 4.950 V 5.049 V 5.148 V 5.247 V 5.346 V VOUT(MAX) 3.840 V 3.940 V 4.040 V 4.141 V 4.242 V 4.343 V 4.444 V 4.545 V 4.646 V 4.747 V 4.848 V 4.949 V 5.050 V 5.151 V 5.252 V 5.353 V 5.454 V December 1999 TOKO, Inc. Page 3 TK716xx TK716xx SIL ELECTRICAL CHARACTERISTICS Test conditions: VIN = VOUT(TYP) + 1 V, TA = 25 C, unless otherwise specified. SYMBOL IQ ISTBY IREV IGND IOUT IOUT(PULSE) VOUT VOUT /T Line Reg PARAMETER Quiescent Current Standby Current Reverse Bias Current GND Pin Current Continuous Output Current Pulse Output Current Output Voltage Temperature Coefficient Line Regulation VIN = VOUT(TYP) + 1 V to VOUT(TYP) + 6 V 1 mA < IOUT < 50 mA 1 mA < IOUT < 100 mA IOUT = 50 mA VDROP Dropout Voltage IOUT = 100 mA IOUT = 150 mA Vref Noise Bypass Terminal Voltage 10 ms pulse, Duty Cycle = 40 % VIN = VOUT(TYP) + 1 V, IOUT = 5 mA See Table 3 20 2 4 7 90 150 200 1.26 17 20 30 160 240 310 TEST CONDITIONS IOUT = 0 mA, Excluding ICONT VIN = 8 V, Output OFF VIN = 0 V, VREV = 5 V, Output OFF IOUT = 50 mA 1 1 MIN TYP 70 MAX 100 0.2 70 2.0 150 200 UNITS A A nA mA mA mA V ppm/ C mV mV mV mV mV mV V Load Reg Load Regulation CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) Control Current Control Voltage ON Control Voltage OFF VOUT = 1.6 V, Output ON Output ON Output OFF 1.8 0.4 10 A V V Gen Note: Exceeding the "Absolute Maximum Ratings" may damage the device. Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 C. Gen Note: Ripple rejection is @ 60 dB when f = 400 Hz, CL = 10 F, CN = 0.1 F, input noise = 100 mVrms, VIN = VOUT(TYP) + 1.5 V and IOUT = 30 mA. Gen Note: Output noise is 0.13 ~ 0.23 V/ Hz at 1 kHz when CN = 0.1 F. Page 4 December 1999 TOKO, Inc. TK716xx TK716xx SIL ELECTRICAL CHARACTERISTICS TABLE 3 Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 C, unless otherwise specified. Room Temp. Range (TA = 25 C) VOUT(MIN) VOUT(MAX) 2.360 V 2.460 V 2.560 V 2.660 V 2.760 V 2.860 V 2.960 V 3.060 V 3.160 V 3.260 V 3.360 V 3.460 V 3.560 V 3.660 V 3.760 V 3.860 V 3.960 V 4.059 V 4.158 V 4.257 V 4.356 V 4.455 V 4.554 V 4.653 V 4.752 V 4.851 V 4.950 V 2.440 V 2.540 V 2.640 V 2.740 V 2.840 V 2.940 V 3.040 V 3.140 V 3.240 V 3.340 V 3.440 V 3.540 V 3.640 V 3.740 V 3.840 V 3.940 V 4.040 V 4.141 V 4.242 V 4.343 V 4.444 V 4.545 V 4.646 V 4.747 V 4.848 V 5.049 V 5.050 V Full Temp. Range (TA = -40 to +85 C) VOUT(MIN) VOUT(MAX) 2.320 V 2.420 V 2.520 V 2.620 V 2.720 V 2.820 V 3.920 V 3.020 V 3.120 V 3.220 V 3.320 V 3.420 V 3.520 V 3.620 V 3.720 V 3.820 V 3.920 V 4.009 V 4.108 V 4.197 V 4.306 V 4.405 V 4.504 V 4.603 V 4.702 V 4.801 V 4.900 V 2.480 V 2.580 V 2.680 V 2.780 V 2.880 V 2.980 V 3.080 V 3.180 V 3.280 V 3.380 V 3.480 V 3.580 V 3.680 V 3.780 V 3.880 V 3.980 V 4.090 V 4.191 V 4.292 V 4.893 V 4.494 V 4.595 V 4.496 V 4.497 V 4.898 V 5.099 V 5.100 V Output Voltage 2.4 V 2.5 V 2.6 V 2.7 V 2.8 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V 3.4 V 3.5 V 3.6 V 3.7 V 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V 4.7 V 4.8 V 4.9 V 5.0 V Voltage Code 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 December 1999 TOKO, Inc. Page 5 TK716xx VOLTAGE AVAILABILITY TABLE 4 Output Voltage 1.3 V 1.4 V 1.5 V 1.6 V 1.7 V 1.8 V 1.9 V 2.0 V 2.1 V 2.2 V 2.3 V 2.4 V 2.5 V 2.6 V 2.7 V 2.8 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V 3.4 V 3.5 V 3.6 V 3.7 V 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V 4.7 V 4.8 V 4.9 V 5.0 V 5.1 V 5.2 V 5.3 V 5.4 V TK716xxSCL TK716xxASCL TK716xxSCLH TK716ASCLH TK716xxSIL TK716xxASIL X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Note: X denotes voltage presently available. Consult factory for availability of other voltages. Page 6 December 1999 TOKO, Inc. TK716xx TEST CIRCUIT IIN VIN + + VIN VOUT + IOUT VOUT CIN = 1.0 F GND CL = 3.3 F NOISE BYPASS CONT ICONT VCONT CN = 0.01 F TYPICAL PERFORMANCE CHARACTERISTICS LOAD REGULATION 5 VOUT (20 mV/ DIV) VOUT (5 mV/ DIV) SHORT CIRCUIT PROTECTION OUTPUT VOLTAGE VS. INPUT VOLTAGE VOUT TYPICAL IOUT = 0 mA IOUT = 25 mA VOUT (V) VOUT TYPICAL 4 3 2 1 0 IOUT = 150 mA IOUT is changed by 25 mA step. 0 50 100 150 0 150 IOUT (mA) 300 0 IOUT (mA) VIN = VOUT VIN (50 MV/DIV) LINE REGULATION VOUT TYPICAL VOUT (50 mV/ DIV) DROPOUT VOLTAGE VS. OUTPUT CURRENT 4 0 -50 VDROP (mV) REVERSE LEAKAGE CURRENT VS. TEMPERATURE VIN, VCONT FLOATING VOUT = 5 V SOURCE 3 IRLEAK (nA) -100 -150 -200 -250 0 100 IOUT (mA) 200 2 1 0 10 VIN (V) 20 0 0 25 50 TA (C) 75 100 December 1999 TOKO, Inc. Page 7 TK716xx TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) IE-3 REVERSE BIAS CURRENT (VIN = 0 V) IE-3 REVERSE BIAS CURRENT VS. TEMPERATURE (VIN = 0 V) IE-6 IREV (A) IE-9 IREV (A) 0 5 VREV (V) STANDBY CURRENT VS. INPUT VOLTAGE 10 IE-6 IE-9 IE-12 IE-12 0 25 50 TA (C) QUIESCENT CURRENT (ON MODE) VS. INPUT VOLTAGE 2.0 IOUT = 0 mA 75 100 IE-7 IE-8 ISTBY (A) VOUT = 3 V IE-9 IQ (mA) 1.0 VOUT = 4 V VOUT = 5 V IE-10 IE-11 IE-12 0 0 10 VIN (V) 20 0 10 VIN (V) 20 CONTROL CURRENT (ON MODE) VS. CONTROL PIN VOLTAGE 5.0 IOUT = 0 mA 4 ICONT (A) GROUND CURRENT VOUT 2.5 IGND (mA) IOUT = 90 mA 2 IOUT = 60 mA IOUT = 30 mA 0 0 2.5 VCONT(V) 5 0 -50 0 TA (C) 50 100 Page 8 December 1999 TOKO, Inc. TK716xx TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) DROPOUT VOLTAGE 5 IOUT = 150 mA 200 4 CONTROL CURRENT VDROP (mV) ICONT (A) IOUT = 90 mA 150 IOUT = 60 mA 100 IOUT = 30 mA 50 IOUT = 1mA 0 -50 0 TA (C) 50 100 VCONT = 3.3 V 3 2 VCONT = 1.8 V 1 0 -50 0 TA (C) 50 100 MAXIMUM OUTPUT CURRENT OUTPUT VOLTAGE TEMPERATURE COEFFICIENT 340 10 VOUT/ T (ppm) IOUT (mA) 320 300 280 260 -50 0 TA (C) 50 100 0 -10 VOUT = 3 V -20 -30 -50 0 TA (C) 50 100 RIPPLE REJECTION 0 -20 -40 -60 -80 -100 0.01 CL = 3.3 F CN = 0.1 F IOUT =30 mA 10 OUTPUT NOISE DENSITY IOUT = 30 mA CL = 2.2 F CNP = 0.001 F CNP = 0.01 F 0.1 CNP = 0.1 F NOISE (V/ HZ) 1.0 RR (dB) CL = 3.3 F CN = 0.01 F 0.1 1 f (kHz) 10 100 0 100 IK f (Hz) 10 K 100 K December 1999 TOKO, Inc. Page 9 TK716xx TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) NOISE LEVEL VS. CN 250 200 NOISE (V) 150 CL = 10 F 100 50 0 1 pF 10 pF 100 pF 1000 pF 0.01 F 0.1 F OUTPUT VOLTAGE RESPONSE 1 (OFF ~ ON) ILOAD = 10 mA, CN = 1000 pF VCONT CL = 2.2 F CL = 3.3 F CL = 2.2 F CL = 4.7 F CL = 3.3 F VOUT CL = 10 F 0 20 40 TIME (s) 60 80 CN OUTPUT VOLTAGE RESPONSE 2 (OFF ~ ON) ILOAD = 30 mA, CL = 3.3 F VCONT VOUT (10 mV/ DIV) VOUT VIN LINE VOLTAGE STEP RESPONSE 1 VOUT +2 V VOUT +1 V CN = 0.001 F, CL = 2.2 F CN = 1000 pF CN = 0.1 F CN = 0.01 F VOUT VOUT CN = 0.01 F, CL = 2.2 F 0 200 400 TIME (s) 600 800 TIME (50 s/ DIV) LINE VOLTAGE STEP RESPONSE 2 VOUT +2 V LOAD CURRENT STEP RESPONSE 1 VOUT VIN VOUT (10 mV/ DIV) CN = 0.01 F, CL = 3.3 F VOUT (20 mV/ DIV) IOUT VOUT +1 V CN = 0.01 F, CL = 2.2 F IOUT = 30 to 60 mA VOUT VOUT IOUT = 5 to 35 mA CN = 0.01 F, CL = 10 F IOUT = 0 to 30 mA TIME (50 s/ DIV) TIME (2.5 s/ DIV) Page 10 December 1999 TOKO, Inc. TK716xx TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) LOAD CURRENT STEP RESPONSE 2 CONTROL VOLTAGE VS. TEMPERATURE 2.0 IOUT CN = 0.01 F, CL = 2.2 F VOUT (20 mV/ DIV) 1.5 VCONT (V) OUTPUT ON 1.0 OUTPUT OFF 0.5 IOUT = 35 to 5 mA IOUT = 60 to 30 mA VOUT IOUT = 30 to 0 mA 0 0 TIME (2.5 s/ DIV) 25 50 TA (C) 75 100 SHORT CIRCUIT CURRENT VS. INPUT VOLTAGE 400 5.0 4.0 300 CONTROL CURRENT VS. TEMPERATURE VCONT = 5.0 V ICONT (A) VOUT IS CONNECTED TO GND IOUT (mA) 3.0 2.0 1.0 VCONT = 2.0 V 0 200 100 0 0 2 4 VIN (V) GROUND CURRENT VS. OUTPUT CURRENT 40 6 8 0 25 50 TA (C) 75 100 DROPOUT CHARACTERISTICS 20 VOUT (0.5 V/ DIV) 30 VOUT IGND (mA) IOUT = 0 mA 10 IOUT = 80 mA 0 0 0.9 40 50 120 160 200 VIN = VOUT VIN (1 V/ DIV) IOUT (mA) December 1999 TOKO, Inc. Page 11 TK716xx TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) GROUND CURRENT VS. INPUT SUPPLY VOLTAGE (VOUT = 3.6 V) 4 4 GROUND CURRENT VS. TEMPERATURE 3 IGND (mA) IGND (mA) 3 IOUT = 80 mA 2 IOUT= 50 mA 1 IOUT = 0 mA 0 0 1 2 3 4 5 2 IOUT = 50 mA 1 IOUT = 0 mA 0 0 25 50 TA (C) 75 100 VIN (V) INSTANTANEOUS SHORT CIRCUIT CURRENT VS. TEMPERATURE 400 VIN = VOUT +1 CL = 2.2 F TANTALUM 300 ISC (mA) 200 100 0 0 25 50 TA (C) 75 100 Page 12 December 1999 TOKO, Inc. TK716xx DEFINITION AND EXPLANATION OF TECHNICAL TERMS OUTPUT VOLTAGE (VOUT) The output voltage is specified with VIN = (VOUT(TYP) + 1 V) and IOUT = 5 mA. DROPOUT VOLTAGE (VDROP) The dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation. Below this value, the output voltage will fall as the input voltage is reduced. It is dependent upon the load current and the junction temperature. CONTINUOUS OUTPUT CURRENT (IOUT) Normal operating output current. This is limited by package power dissipation. PULSE OUTPUT CURRENT (IOUT (PULSE)) Maximum pulse width 10 ms; duty cycle is 40%: pulse load only. LINE REGULATION (Line Reg) Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. The line regulation is specified as the input voltage is changed from VIN = VOUT + 1 V to VIN = VOUT + 6 V. LOAD REGULATION (Load Reg) Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. It is a pulsed measurement to minimize temperature effects with the input voltage set to VIN = VOUT +1 V. The load regulation is specified under three output current step conditions of 1 mA to 50 mA, 1 mA to 100 mA and 1 mA to 150 mA. QUIESCENT CURRENT (IQ) The quiescent current is the current which flows through the ground terminal under no load conditions (IOUT = 0 mA). GROUND CURRENT (IGND) Ground Current is the current which flows through the ground pin(s). It is defined as IIN - IOUT, excluding control current. December 1999 TOKO, Inc. Page 13 RIPPLE REJECTION RATIO (RR) Ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. It is specified with 100 mVrms, 400 Hz superimposed on the input voltage, where VIN = VOUT + 1.5 V. The output decoupling capacitor is set to 10 F, the noise bypass capacitor is set to 0.1 F, and the load current is set to 30 mA. Ripple rejection is the ratio of the ripple content of the output vs. the input and is expressed in dB. STANDBY CURRENT (ISTBY) Standby current is the current which flows into the regulator when the output is turned off by the control function (VCONT = 0 V). It is measured with VIN = 8 V. SENSOR CIRCUITS Overcurrent Sensor The overcurrent sensor protects the device if the output is shorted to ground. Thermal Sensor The thermal sensor protects the device if the junction temperature exceeds the safe value (Tj = 150 C). This temperature rise can be caused by extreme heat, excessive power dissipation caused by large output voltage drops, or excessive output current. The regulator will shut off when the temperature exceeds the safe value. As the junction temperature decreases, the regulator will begin to operate again. Under sustained fault conditions, the regulator output will oscillate as the device turns off then resets. Damage may occur to the device under extreme fault conditions. Reverse Voltage Protection Reverse voltage protection prevents damage due to the output voltage being higher than the input voltage. This fault condition can occur when the output capacitor remains charged and the input is reduced to zero, or when an external voltage higher than the input voltage is applied to the output side. TK716xx DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.) PACKAGE POWER DISSIPATION (PD) This is the power dissipation level at which the thermal sensor is activated. The IC contains an internal thermal sensor which monitors the junction temperature. When the junction temperature exceeds the monitor threshold of 150 C, the IC is shut down. The junction temperature rises as the difference between the input power (VIN x IIN) and the output power (VOUT x IOUT) increases. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient temperature. When the IC mounting has good thermal conductivity, the junction temperature will be low even if the power dissipation is great. When mounted on the recommended mounting pad, the power dissipation of the SOT23-5 is increased to 500 mW. For operation at ambient temperatures over 25 C, the power dissipation of the SOT23-5 device should be derated at 4.0 mW/ C. To determine the power dissipation for shutdown when mounted, attach the device on the actual PCB and deliberately increase the output current (or raise the input voltage) until the thermal protection circuit is activated. Calculate the power dissipation of the device by subtracting the output power from the input power. These measurements should allow for the ambient temperature of the PCB. The value obtained from PD /(150 C - TA) is the derating factor. The PCB mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. As a general rule, the lower the temperature, the better the reliability of the device. The thermal resistance when mounted is expressed as follows: Tj = 0jA x PD + TA 500 The range of usable currents can also be found from the graph below. (mW) PD 3 DPD 6 4 5 25 50 75 TA (C) 150 Procedure: Find PD PD1 is taken to be PD x (~0.8 - 0.9) Plot PD1 against 25 C Connect PD1 to the point corresponding to the 150 C with a straight line. 5) In design, take a vertical line from the maximum operating temperature (e.g., 75 C) to the derating curve. 6) Read off the value of PD against the point at which the vertical line intersects the derating curve. This is taken as the maximum power dissipation, DPD. The maximum operating current is: IOUT = (DPD / (VIN(MAX) - VOUT) 1) 2) 3) 4) PD (mW) For Toko ICs, the internal limit for junction temperature is 150 C. If the ambient temperature (TA) is 25 C, then: 150 C = 0jA x PD + 25 C 0jA = 125 C / PD 400 300 200 100 MOUNTED AS SHOWN FREE AIR PD is the value when the thermal protection circuit is activated. A simple way to determine PD is to calculate VIN x IIN when the output side is shorted. Input current gradually falls as temperature rises. You should use the value when thermal equilibrium is reached. 0 0 50 TA (C) 100 150 SOT23-5 POWER DISSIPATION CURVE Page 14 December 1999 TOKO, Inc. TK716xx APPLICATION INFORMATION INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors in order to maintain regulator loop stability. The equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. Since the ESR varies widely between ceramic and tantalum capacitors, the proper IC must be selected according to the output capacitor used: The TK716xxS is designed for use with ceramic output capacitors. (Chip tantalum capacitors and electrolytic capacitors with an ESR below 6 can provide stable operation.) The TK716xxAS is designed for use with tantalum output capacitors. The DC electrical characteristics and the specifications of the TK716xxS and TK716xxAS are the same; only the value of the internal phase compensation is different. Increasing the value of the required output capacitor does not cause abnormal operation. Increasing the value can improve noise reduction, line regulation, load regulation, and stability. For stable operation, an input capacitor of 0.22 F or more is required. Note: it is very important to check the selected manufacturers' electrical characteristics. The values of capacitance and ESR vary from manufacturer to manufacturer, and with product type. A thorough examination is necessary to determine the characteristics of the capacitor in mass production. The characteristics also vary over temperature. In general, it is recommended to use as large a value of output capacitance as is practical. Please refer to the following graphs for output capacitor selection. Output side capacitor CL = 2.2 F TK71630S 100 100 TK71630AS 10 10 ESR () ESR () 1 1 Stable area Stable area 0.1 0.1 3.3 F 0.01 0 50 IOUT (mA) 100 130 0.01 0 50 IOUT (mA) 100 130 December 1999 TOKO, Inc. Page 15 TK716xx APPLICATION INFORMATION (CONT.) The value of ESR between ceramic and tantalum capacitors differs by about two orders of magnitude as illustrated below. The characteristics of tantalum capacitors also vary widely according to manufacturer. The output capacitor becomes a part of the phase compensation in a LDO regulator using a PNP pass transistor. Because of this, it is necessary to optimize the phase compensation in the IC for use with ceramic or tantalum capacitors. 10 ESR vs. TEMPERATURE at 100 kHZ 1 ESR () Tantalum Cap 0.1 Ceramic Cap 0.01 -20 0 50 60 TEMPERATURE (C) BOARD LAYOUT GND VIN VOUT + + NOISE BYPASS CONTROL SOT23-5 BOARD LAYOUT Page 16 December 1999 TOKO, Inc. TK716xx APPLICATION INFORMATION (CONT.) REVERSE BIAS PROTECTION The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode. This saves both cost and board space. The high output voltage accuracy and low dropout voltage are maintained when the IC is turned ON/OFF by using the control pin as illustrated below. VIN VIN TK716xxS VOUT VIN VOUT PRO VCONT GND TK716xxS GND Another reverse bias protection technique is illustrated below. The extra diode and extra capacitor are not necessary with the TK716xx. The high output voltage accuracy is maintained because the diode forward voltage variations over temperature and load current have been eliminated. High-side switching with a FET is illustrated below. Battery life is extended by the dropout voltage of the FET when the input of the TK716xx is connected in front of the FET switch. FET SWITCHING OUTPUT VIN VOUT 716xx VCONT VIN TK716xxS VOUT VOLTAGE BACKUP OPERATION (HOLDUP TIME) C L becomes the backup power supply when the microprocessor is reset with the voltage detector IC simultaneously with the turning OFF the TK716xx. CL provides the holdup time necessary to do an orderly shutdown of the microprocessor. HIGH-SIDE SWITCHING High-side switching should not be implemented by an external transistor as shown below. This results in additional voltage drop and loss of accuracy. VIN VDROP VOLTAGE DETECTOR IC VOUT VOUT TK716xxS VCONT OFF CL GND PRO RESET VOLTAGE REGULATOR ON/OFF CONTROL December 1999 TOKO, Inc. Page 17 TK716xx APPLICATION INFORMATION (CONT.) PARALLEL ON/OFF CONTROL The figure below illustrates multiple regulators being controlled by a single ON/OFF control signal. The series resistor R is put in the input line of the low output voltage regulator in order to prevent overdissipation. The voltage dropped across the resistor reduces the large input-tooutput voltage across the regulator, reducing the power dissipation in the device. VIN TK71650 5V VIN VOUT TK716xx ON/OFF LOGIC CMOS REGULATOR CURRENT BOOST OPERATION The output current can be increased by connecting an external PNP transistor as shown below. The output current capability depends upon the Hfe of the external transistor. Note: The TK716xx internal short circuit protection and thermal sensor do not protect the external transistor. 3V TK71630 R 2V TK71620 ON/OFF CONTROL SWITCHING OPERATION Even though the input voltages or the output voltages are different, the outputs of the TK716xx regulators can be connected together, and the output voltages switched. If two or more TK716xx regulators are turned ON simultaneously, the highest output voltage will be present. VIN VIN 150 0.22 F TK716xx VOUT VCONT VIN VCONT VIN TK71630 TK71628 VCONT VOUT 3.0 OR 2.8 V ON/OFF LOGIC The outputs of the TK716xx regulator and a CMOS regulator can be connected together as long as the output voltage of the TK716xx is greater than the CMOS regulator. When the TK716xx is OFF, the CMOS regulator is turned ON. When the TK716xx is ON, the CMOS regulator is turned OFF. Page 18 December 1999 TOKO, Inc. TK716xx NOTES December 1999 TOKO, Inc. Page 19 TK716xx PACKAGE OUTLINE Marking Information Part Number 0.7 SOT23-5 TK716xxS Marking L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 L28 L29 L30 L31 L32 L33 L34 L35 L36 L37 L38 L39 L40 L41 L42 L43 L44 L45 L46 L47 L48 L49 L50 L51 L52 L53 L54 TK716xxAS Marking 13L 14L 15L 16L 17L 18L 19L 20L 21L 22L 23L 24L 25L 26L 27L 28L 29L 30L 31L 32L 33L 34L 35L 36L 37L 38L 39L 40L 41L 42L 43L 44L 45L 46L 47L 48L 49L 50L 51L 52L 53L 54L Marking 1.0 5 4 (0.6) e 0.95 e' e 0.95 1.90 1 2 3 0.4 +0.15 -0.05 e 0.95 e 0.95 Recommended Mount Pad 0.1 M 2.9 0.3 0.1 Dimensions are shown in millimeters Tolerance: x.x = 0.2 mm (unless otherwise specified) 0 - 15 2.8 TK71613 TK71614 TK71615 TK71616 TK71617 TK71618 TK71619 TK71620 TK71621 TK71622 TK71623 TK71624 TK71625 TK71626 TK71627 TK71628 TK71629 TK71630 TK71631 TK71632 TK71633 TK71634 TK71635 TK71636 TK71637 TK71638 TK71639 TK71640 TK71641 TK71642 TK71643 TK71644 TK71645 TK71646 TK71647 TK71648 TK71649 TK71650 TK71651 TK71652 TK71653 TK71654 1.4 max (0.6) 1.6 1.1 (0.8) 0.15 - 0.05 0 - 0.1 +0.15 e1 2.4 max Check Table 4 for availability. Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 TOKO AMERICA REGIONAL OFFICES Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375 Visit our Internet site at http://www.tokoam.com The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc. Page 20 (c) 1999 Toko, Inc. All Rights Reserved IC-216-TK716xx 0798O0.0K December 1999 TOKO, Inc. Printed in the USA |
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