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TK11225AUBX Datasheet(PDF) 1 Page - TOKO, Inc |
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TK11225AUBX Datasheet(HTML) 1 Page - TOKO, Inc |
1 / 34 page Page 1 January, 1996 TOKO, Inc. 1-4-96 TK112xxA VOLTAGE REGULATOR WITH ON/OFF SWITCH FEATURES s High Voltage Precision at ± 2.4% s Active High On/Off Control s Very Low Dropout Voltage 80 mV at 30 mA s Very Low Noise s Very Small SOT-23L or SOT-89-5 Surface Mount Packages s Internal Thermal Shutdown s Short Circuit Protection APPLICATIONS s Battery Powered Systems s Cellular Telephones s Pagers s Personal Communications Equipment s Portable Instrumentation s Portable Consumer Equipment s Radio Control Systems s Toys s Low Voltage Systems TK112 A Voltage Code Package Code Tape/Reel Code TAPE/REEL CODE BX : Bulk/Bag TL : Tape Left (SOT-23L) TB : Tape Bottom (SOT-89-5) PACKAGE CODE M: SOT-23L U: SOT-89-5 ORDERING INFORMATION VOLTAGE CODE 20 = 2.0 V* 21 = 2.1 V 22 = 2.22 V* 25 = 2.5 V* 28 = 2.8 V* 29 = 2.9 V 30 = 3.0 V* 31 = 3.1 V* 33 = 3.3 V* 35 = 3.5 V* 36 = 3.6 V 38 = 3.8 V 40 = 4.0 V* 42 = 4.2 V 45 = 4.5 V* 48 = 4.8 V* 49 = 4.9 V 50 = 5.0 V* 55 = 5.5 V * Indicates voltage is available in a SOT-89-5 package. BLOCK DIAGRAM S S S S S S S S S S S VOUT GND + – BANDGAP REFERENCE THERMAL PROTECTION – + S NOISE BYPASS S S S S S S VIN CONTROL S S TK112XXA P50 1 3 CONTROL GND 6 4 VIN V OUT TK112xxA • PO 2 5 GND NOISE BYPASS 1 3 6 4 2 5 VOUT GND NOISE BYPASS GND CONTROL VIN DESCRIPTION The TK112xxA is a low dropout linear regulator with a built- in electronic switch. The internal 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 logic high level. An external capacitor can be connected to the noise bypass pin to lower the output noise level to 30 µVrms. An internal PNP pass transistor is used to achieve a low dropout voltage of 70 mV (typ.) at 30 mA load current. The TK112xxA has a very low quiescent current of 180 µA at no load and 1 mA with a 30 mA load. The standby current is typically 100 nA. The internal thermal shutdown circuitry limits the junction temperature to below 150 °C. The load current is internally monitored and the device will shutdown in the presence of a short circuit or overcurrent condition at the output. The TK112xxA is available in either 6 pin SOT-23L or 5 pin SOT-89-5 surface mount packages. |
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