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| TK702xx 1.03 V REGULATOR WITH ON/OFF SWITCH FEATURES s s s s s Low Input Voltage Operation (Single Battery Cell) Internal PNP Transistor Built-In Shutdown Control (Off Current, 8 A Typ) Low Dropout Voltage (30 mV Typ) Very Small Surface Mount Package (SOT-25) APPLICATIONS s s s s s Pagers Personal Communication Equipment Portable Consumer Equipment Radio Control Systems Single Battery Cell Systems DESCRIPTION The TK702xx is a very low dropout, low input voltage operation regulator suitable for single battery cell applications. This regulator provides 1.03 V output with a dropout voltage of only 30 mV. The active high control provides on/ off switching of the output. In the off mode, the standby supply current is 8 A, thus extending battery life. The TK702xx is available in a very small plastic surface mount package (SOT-25). TK702xx SHUT DOWN 1 GND 2 GND 3 6 VIN 4 VO BLOCK DIAGRAM ORDERING INFORMATION TK702 M Tape/Reel Code VIN 6 4 VO SHUT DOWN SHUT DOWN 1 + - Voltage Code VOLTAGE CODE 03 = 1.03 V TAPE/REEL CODE BX : Bulk/Bag TL : Tape Left BANDGAP REFERENCE 2,3 GND TK70203 BD January, 1996 TOKO, Inc. 1-16-96 Page 1 TK702xx ABSOLUTE MAXIMUM RATINGS Input Voltage .............................................................. 6 V Power Dissipation .............................................. 150 mW Operating Voltage Range .............................. 0.9 to 5.0 V Junction Temperature .......................................... 150 C Storage Temperature Range ................... -55 to +150 C Operating Temperature Range .................. -10 to +60 C Lead Soldering Temp. (10 sec.) ......................... 240 C ELECTRICAL CHARACTERISTICS Test Conditions: VCC = 1.4 V, TA = 25 C, unless otherwise specified. SYMBOL IIN ISTBY VO V DROP IO Line Reg Load Reg RR VO/TA PARAMETER Supply Current Standby Current Output Voltage In/Out Voltage Drop Output Current Line Regulation Load Regulation Ripple Rejection TEST CONDITIONS IO = 0 mA VIN = VOUT - 50 mV, IO = 0 mA VOUT = Off, R = 820 k, Note 1 IO = 2 mA IO = 2 mA Note 2 VIN = 1.4 1.7 V IO = 0.1 5.0 mA, Note 3 100 mVrms, f = 400 Hz, IO = 2 mA 8 0.98 MIN TYP 180 400 8 1.03 30 16 10 5 36 0.3 30 20 MAX 280 800 13 1.065 60 UNITS A A A V mV mA mV mV dB mV/C Output Voltage IO = 2 mA, TA = -10 to +50 C Temperature Dependency R = 820 k (series connection) VOUT = Off, VCONT = VCC - 1.4 V VOUT = On, TA = -10 to +60 C VOUT = Off, TA = -10 to +60 C VCC - 0.2 0 Control Terminal Specification ICONT V CONT Control Current Control Voltage 2 V CC V CC - 0.8 A V V Note 1: Standby current (including control current) is the input current with a 820k connected in series with the control terminal. Note 2: IO (Load Current) is a output current value when VO drops down 0.2 V from VO at IO = 2 mA. Note 3: Since the measurement (pulse measurement) is in a constant TJ, the output change due to temperature change is not included. Page 2 1-16-96 January, 1996 TOKO, Inc. TK702xx TEST CIRCUIT IIN A VIN 5 4 VO IN T K70203 VIN 0.1 F OUT + + CL 4.7 F SHUT DOWN 1 2 3 GND IO V VO 0.1 F Rc CL = 3.3 F VSD 820 kW TK70203 TC TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT VOLTAGE vs. OUTPUT CURRENT 1.05 TA = 25 C INPUT CURRENT vs. OUTPUT CURRENT 1.0 TA = 25 C 1.2 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE TA = 25 C IIN (mA) VO (V) VO (V) 1.0 0.5 1.0 0.95 0 10 IO (mA) 20 1 0 0 10 IO (mA) 20 2 0.7 0.8 1.0 VIN (V) 3 1.5 1.8 INPUT CURRENT (NO LOAD) vs. INPUT VOLTAGE 500 TA = 25 C 1.05 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE TA = 25 C +25 OUTPUT VOLTAGE DRIFT vs. TEMPERATURE IIN ( A) VO (V) IO = 5.0 mA 1.0 I = 0 mA O VO (mV) 1.3 5 0 IO = 2.5 mA 0 0 1 2 3 VIN (V) 4 5 4 0.95 0.8 0.9 1.0 1.1 VIN (V) 1.2 -30 -50 0 50 TEMPERATURE(C) 100 6 January, 1996 TOKO, Inc. 1-16-96 Page 3 TK702xx TYPICAL PERFORMANCE CHARACTERISTICS RIPPLE REJECTION 0 TA = 25 C 1.5 VIN 1.3 LINE TRANSIENT RESPONSE 6.0 TA = 25 C IO LOAD TRANSIENT RESPONSE RIPPLE REJECTION (dB) -50 1.05 VO 1.01 -100 .1 1 10 100 7 0 1.05 VO TA = 25 C 1.01 50 s/DIV 8 9 FREQUENCY (kHz) 50 s/DIV OUTPUT (ON/OFF) CONTROL RESPONSE TA = 25 C SD 200 DROPOUT VOLTAGE vs. OUTPUT CURRENT TA = 25 C 1.0 SHORT CIRCUIT CURRENT TA = 25 C 0.8 CL = 1 F VDROP (mV) VO CL = 3.3 F VO (V) 100 0.6 0.4 0.2 VIN = 1.2 V 1.4 V 0 10 s/DIV 10 0 0 1 2 3 IO (mA) 4 5 11 0 10 IO (mA) 20 12 ON/OFF CONTROL TERMINAL (SERIES RESISTOR RC) 2.0 TA = 25 C VOUT RC = 500 k RC = 820 k INPUT CURRENT vs. INPUT VOLTAGE 20 RC = 820 k TA = 25 C -50 NOISE SPECTRUM TA = 25 C IO = 3 mA IN(OFF) ( A) ICONT ( A) RC = 500 k RC = 1 M NOISE (dB) -100 (SPECTRUM ANALYZER ONLY) 1.0 RC = 820 k RC = 1 M 10 0 0 1.0 VCONT (V) 2.0 13 0 1.0 VIN(V) 2.0 14 0 500 kHz FREQUENCY 1 MHz 15 Page 4 1-16-96 January, 1996 TOKO, Inc. TK702xx APPLICATION NOTES RECOMMENDED MOUNTING Optimum performance can only be achieved when the IC is mounted on a PC board according to the diagram below. This is because of the extremely small package and limited power dissipation. Shape the metal portion of the PCB as shown in the following drawing. V IN VO GND GND ON/ OFF or CP T K70203*FIG1A Use a large bypass capacitor and connect it in a place near GND of the IC. Pay attention to temperature characteristics of the capacitor, especially the increase of ESR and decrease of capacitance in low temperatures. Oscillation, reduction of ripple rejection and increased noise may occur in some cases if the proper capacitor is not used. An output capacitor more than 1.0 F is required to maintain stability. The standard test condition is 3.3 F (TA = 25 C). DROPOUT VOLTAGE Dropout voltage is the voltage difference between the input voltage and the output voltage where the output voltage decreases to 100 mV below the nominal output voltage as the input voltage is decreased. To measure dropout voltage, set the input voltage to the nominal output voltage +1 V and measure the output voltage. Reduce the input voltage to the point where the output is 100 mV below the prevoiusly measured value. The dropout voltage is the difference between the input and ouput voltage at this point. This voltage depends on the load current and ambient temperature. January, 1996 TOKO, Inc. 1-16-96 Page 5 TK702xx PACKAGE OUTLINE ( ) SOT-25 5 4 0.7 (0.6) +0.2 -0.3 1.0 1.6 Marking Information 1 2 3 (0.6) e 0.4 e 0.1 0.95 0.1 M e' e 0.95 0.95 e 0.95 1.90 Recommended Mount Pad (1.9) 2.9 0.2 +0.1 -0.05 1.3max 0.1 e1 2.6 0 ~0.1 1.1 0.8 2.8 +0.2 -0.3 Unit:mm Marking Information TK70203 L03 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. YOUR LOCAL REPRESENTATIVE IS: TOKO America, Inc. 1250 Feehanville Dr. Mt. Prospect, IL 60056 Tel: 1(800) PIK-TOKO Fax: 1(847) 699-1194 Page 6 (c) 1993 Toko America, Inc. All Rights Reserved 0.16 1-16-96 January, 1996 TOKO, Inc. Printed in U.S.A. Please order by literature number: IC-136-TK70203 |
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