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TK73225 Datasheet(PDF) 1 Page - TOKO, Inc |
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TK73225 Datasheet(HTML) 1 Page - TOKO, Inc |
1 / 16 page January 1999 TOKO, Inc. Page 1 TK732xx CPULSE CONTROL GND BASE NOISE BYPASS VSENSE IPK VIN TK732xx 01S FEATURES s Up to 5 A Output Current Capability With External PNP Transistor s Internal Short Circuit Protection s Excellent Load Regulation s CMOS/TTL-Compatible On/Off Switch s Internal Reverse Bias Current Protection Switch s Internal Thermal Shutdown s Broad Operating Voltage Range s High Impedance V SENSE Pin (Off Mode) s Continuous and Pulsed Current Modes APPLICATIONS s Battery Powered Systems s Cellular/Cordless Telephones s Radio Control Systems s Wireless Communications Systems s Portable Instrumentations s Portable Computers s Personal Digital Assistants s Local Area Network (LAN) Receivers s Lithium Ion Battery Chargers s Power Recovery for Microprocessors VOLTAGE CODE 20 = 2.0 V * 32 = 3.2 V 44 = 4.4 V 21 = 2.1 V * 33 = 3.3 V 45 = 4.5 V 22 = 2.2 V * 34 = 3.4 V 46 = 4.6 V 23 = 2.3 V * 35 = 3.5 V 47 = 4.7 V 24 = 2.4 V 36 = 3.6 V 48 = 4.8 V 25 = 2.5 V 37 = 3.7 V 49 = 4.9 V 26 = 2.6 V 38 = 3.8 V 50 = 5.0 V 27 = 2.7 V 39 = 3.9 V 55 = 5.5 V * 28 = 2.8 V 40 = 4.0 V 70 = 7.0 V * 29 = 2.9 V 41 = 4.1 V 80 = 8.0 V 30 = 3.0 V 42 = 4.2 V 11 = 11.0 V 31 = 3.1 V 43 = 4.3 V TK732 M L ORDERING INFORMATION Tape/Reel Code TAPE/REEL CODE L: Tape Left TEMP. RANGE C: -30 to 80 C ** I : -40 to 85 C Temp. Code Package Code Voltage Code Grade * Unavailable with I Rank ** unless Otherwise Specified *** TK73241MCLH, TK73242MCLH Available Only PACKAGE CODE M: SOT-23L-8 GRADE None: Standard 2% H: High (Special) ** * BLOCK DIAGRAM DESCRIPTION The TK732xx is a controller IC for a low dropout voltage regulator. The TK732xx and the external PNP power transistor provide standard output voltages from 2 to 11 V and output current from 100 mA to 5 A. By utilizing an external PNP power transistor, low dropout voltage at high current can be readily achieved. The internal electronic switch can be controlled by TTL or CMOS logic levels. The device is in the “on” state when the control pin is pulled to a high logic level. A pin for a bypass capacitor, which connects to the internal circuitry, is provided to lower the overall output noise level. The current limit characteristics can be configured as continuous (constant current) or pulsed (cycling). An internal thermal shutdown circuit limits the junction temperatures to below 150 °C. In the “off” mode, the output of the regulator becomes a high impedance. This prevents the output capacitor from being rapidly discharged for backup to the load. CONTROL NOISE BYPASS VIN THERMAL SENSOR ON/OFF CIRCUIT BANDGAP REFERENCE LEAKAGE PROTECTION IPK CPULSE BASE VSENSE GND LOW DROPOUT REGULATOR |
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