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| TK70001 SINGLE INPUT, TWO OUTPUT SOLID STATE SWITCH FEATURES s s s s s s s Internal PNP Power Transistor Reverse Bias Voltage Protection Very Low Input-Output Voltage Difference Very Low Standby Current Overtemperature Protection Single Input with Two Controlled Outputs Low Noise APPLICATIONS s s s s s s s Battery Powered Systems Radio Control Systems Automatic Test Equipment (ATE) Power Management Process Control Equipment Power Distribution Control Communication Equipment DESCRIPTION The TK70001 is a monolithic bipolar integrated circuit with high side current switches of low saturation type. The current, including the control current, is zero (pA level) when the control pin is "off". The impedance on the output side is high and the reverse current does not flow when the control pin is "off". These are effective to decrease the dissipation currents, making the TK70001 a very efficient device for power management and power distribution control. The TK70001 is available in a miniature SOT-26 surface mount package. When mounted as recommended, this package is capable of dissipating up to 350 mW. TK70001 OUTPUT 1 01 S CONT 1 INPUT GND OUTPUT 2 CONT 2 BLOCK DIAGRAM ORDERING INFORMATION INPUT TK70001MCB OUTPUT 2 OUTPUT 1 Tape/Reel Code THERMAL PROTECTION TAPE/REEL CODE B: Tape Left CONT 2 SW CIRCUIT CONT 1 GND January 1999 TOKO, Inc. Page 1 TK70001 ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................... 14 V Output Current .................................................... 130 mA Power Dissipation (Note 1) ................................ 350 mW Storage Temperature Range ................... -55 to +150 C Operating Temperature Range ...................-30 to +80 C Operating Voltage Range ............................... 1.6 to 12 V Junction Temperature .......................................... 150 C Lead Soldering Temperature (10 s) ..................... 235 C TK70001 ELECTRICAL CHARACTERISTICS Test conditions: TA = 25 C, VIN = 2.5 V, unless otherwise specified. SYMBOL IQ ISTBY IOUT IGND VDROP VD IREV PARAMETER Quiescent Current Standby Current TEST CONDITIONS IOUT = 0 mA, ICONT = 50 A VIN = 8 V, Output OFF, VCONT = 0 V VDROP = 0.5 V, ICONT = 50 A VDROP = 0.5 V, ICONT = 100 A Ground Current (Note 3) Dropout Voltage Balance Between Channels Reverse Bias Current IOUT = 50 mA, ICONT = 50 A IOUT = 50 mA, ICONT = 50 A VDROP difference, IOUT = 50 mA, ICONT = 50 A VIN = 0 V, VREV = 8 V, VCONT = 0 V, Output OFF 0.02 60 80 MIN TYP 0.6 0.1 100 130 3.5 0.17 5.5 0.35 50 50 MAX 1.2 100 UNITS mA nA mA mA mA V mV nA Output Current ON/OFF CONTROL TERMINAL ICONT VCONT(ON) VCONT(OFF) Control Terminal Current Control Voltage (ON) Control Voltage (OFF) VCONT = 1.6 V, IOUT = 50 mA Output ON Output OFF (Note 2) 50 1.0 0. 2 95 140 A V V Note 1: Power dissipation is 350 mW when mounted as recommended. Derate at 2.8 mW/C for operation above 25C. Power dissipation is 150 mW in Free Air. Derate at 1.2 mW/C for operation above 25 C. Note 2: By grounding this terminal, the operation completely stops and the input current decreases to a pA level. Note 3: Ground current is defined as IIN - IOUT, excluding control terminal current. Refer to "Definition of Terms." Gen. Note: Parameters with min. or max. values are 100% tested. Gen. Note: Exceeding "Absolute Maximum Ratings" can damage the device. Page 2 January 1999 TOKO, Inc. TK70001 TEST CIRCUIT INPUT VIN IIN CIN 1 F VOUT 2 IOUT 2 OUTPUT 2 OUTPUT 1 IOUT 1 VOUT 1 CL 2 = 0.1 F CL 1 = 0.1 F CONT 2 CONT 1 ICONT 2 VCONT 2 RCONT 2 RCONT 1 ICONT 1 VCONT 1 TYPICAL PERFORMANCE CHARACTERISTICS DROPOUT VOLTAGE VS. CONTROL CURRENT 400 100 CONTROL CURRENT VS. CONTROL VOLTAGE MAX OUTPUT CURRENT VS. CONTROL CURRENT 140 125 mA 80 10K RCONT = 0 ICONT ( A) 60 20K 30K 300 VDROP (mV) 100 mA 75 mA 100 50K 75K 100K 200 50 mA 100 IOUT = 25 mA 0 0 50 ICONT ( A) 100 IOUT (mA) 40 60 VIN = 1.5 V VIN = 3.0 V VIN = 4.5 V VIN = 6.0 V 20 0 20 0 1 2 3 4 5 10 20 30 40 50 VCONT (V) ICONT ( A) DROPOUT VOLTAGE VS. OUTPUT CURRENT 0 100 VDROP (mV) QUIESCENT CURRENT VS. INPUT VOLTAGE 500 REVERSE CURRENT VS. REVERSE VOLTAGE 2 ICONT = 50 A IREV (nA) 15 IQ ( A) 200 300 400 VIN = 1 V VIN = 5.0 V ICONT = 40 A 250 ICONT = 30 A ICONT = 20 A ICONT = 10 A 1 VIN = 2.5 V 0 0 50 100 150 0 5 VIN (V) 10 0 0 5 10 VREV (V) 15 IOUT (mA) January 1999 TOKO, Inc. Page 3 TK70001 TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) GROUND CURRENT VS. OUTPUT CURRENT 10 0 -100 VDROP (mV) DROPOUT VOLTAGE VS. OUTPUT CURRENT AT 2 CIRCUIT PARALLEL 5.0 QUIESCENT CURRENT VS. INPUT VOLTAGE IGND (mA) -200 -300 -400 IQ (mA) 5 2.5 ICONT = 150 A ICONT = 100 A ICONT = 50 A 0 0 50 IOUT (mA) 100 0 0 100 IOUT (mA) 200 0 5 VIN (V) 10 15 ON/OFF RESPONSE CIN = 0.1 F CIN = 0 VIN IOUT = 30 mA CIN VCONT CIN must be over 0.1 F 0 1 2 TIME (s) 3 4 ON/OFF RESPONSE CL = 0 CL = 0.01 F VIN IOUT = 30 mA 1 F CL CL = 0.001 F VCONT 0 1 2 TIME (s) 3 4 Page 4 January 1999 TOKO, Inc. TK70001 TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) LOAD RESPONSE CIN = 1 F 50 mV/ DIV VOUT CL = 0.1 F 30 mA 0 0 IOUT 10 20 TIME (s) 30 40 VIN IOUT = 0 to 30 mA 1 F CL January 1999 TOKO, Inc. Page 5 TK70001 DEFINITION AND EXPLANATION OF TECHNICAL TERMS DROPOUT VOLTAGE (VDROP) The output voltage decreases with the increase of output current. It is dependent upon the load current and the junction temperature. The dropout voltage is the difference between the input voltage and the output voltage. The measurement current is IOUT = 50 mA. (ICONT = 50 A, VIN = 2.5 V). OUTPUT CURRENT (IOUT) The rated output current is specified under the condition where the output voltage drops 0.5 V below the no load value. The input voltage is set to 2.5 V, and the current is pulsed to minimize temperature effects. QUIESCENT CURRENT (IQ) The quiescent current is the current which flows through the ground terminal under no load conditions (IOUT = 0 mA) with VIN = 2.5 V and excludes the control pin current. STANDBY CURRENT (ISTBY) Standby current is the current which flows into the solid state switch when the output is turned off by the control function (VCONT = 0 V). It is measured with VIN = 8 V. GROUND CURRENT (IGND) Ground current is the current which flows through the ground pin(s). It is defined as IIN - IOUT, excluding control current. ON/OFF CONTROL High is "on" (referenced to ground). The input current is at the pA level by connecting the control terminal to ground. 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. ON/OFF CONTROL CURRENT The characteristics of TK70001 change by the value of control current. Please refer to the electrical characteristics graphs on the data sheet and determine the optimum value. The standard measurement condition is ICONT = 50 A. (The application is max. ICONT = 200 A). In the condition where there is very little output current, connect the resistor RCONT to the control terminal (please consider the reduction of the terminal voltage, the resistance value, etc.). This current can be lowered. THERMAL SENSOR The thermal sensor protects the device in the event that the junction temperature exceeds the safe value (Tj = 150 C). This temperature rise can be caused by external heat, excessive power dissipation caused by large input to output voltage drop, or excessive output current. The switch will shut off when the temperature exceeds the safe value. As the junction temperature decreases, the switch will begin to operate again. Under sustained fault conditions, the switch output will cycle as the device turns off, and then resets. Damage may occur to the device under extreme fault conditions. 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 SOT-26 is increased to 350 mW. For operation at ambient temperatures over 25 C, the power dissipation of the SOT-26 device should be derated at 2.8 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 January 1999 TOKO, Inc. Page 6 TK70001 DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.) 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 PD (mW) The maximum operating current is: IOUT = (DPD / (VIN(MAX) - VOUT) 450 350 250 FREE AIR 150 50 0 0 50 TA ( C) 100 150 MOUNTED AS SHOWN 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 PD is the value when the thermal sensor 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. The range of usable currents can also be found from the graph below. (mW) PD 3 SOT-26 POWER DISSIPATION APPLICATION INFORMATION BOARD LAYOUT 6 4 5 DPD The copper pattern should be as large as possible. 25 50 75 TA ( C) 150 INPUT OUTPUT 2 + Procedure: + OUTPUT 1 + 1) 2) 3) 4) 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. CONT 1 GND CONT 2 PCB: CLASS EPOXY T=0.8 mM SOT-26 BOARD LAYOUT January 1999 TOKO, Inc. Page 7 TK70001 PACKAGE OUTLINE Marking Information Marking 01S SOT-26 (SOT-23-6) 0.7 TK70001 Marking 1.0 (0.6) 6 5 4 (0.6) 1.6 e 0.95 e e 0.95 1.90 1 2 3 0.3 + 0.1 Recommended Mount Pad e 0.95 e 0.95 (1.9) 0.1 M 2.9 e 1 2.4 1.4 max 1.1 0 ~ 0.1 0.1 0.15 2.8 + 0.3 + 0.1 Dimensions are shown in millimeters Tolerance: x.x = 0.2 mm (unless otherwise specified) 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 8 (c) 1999 Toko, Inc. All Rights Reserved IC-216-TK70001 0798O0.0K 0-13 January 1999 TOKO, Inc. Printed in the USA |
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