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TK11246B Datasheet(PDF) 1 Page - TOKO, Inc |
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TK11246B Datasheet(HTML) 1 Page - TOKO, Inc |
1 / 24 page October 1999 TOKO, Inc. Page 1 TK112xxB FEATURES s High Voltage Precision at ± 2.0% 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 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 BLOCK DIAGRAM TK112xxB GND CONTROL VOUT VIN NOISE BYPASS GND VOUT GND NOISE BYPASS GND CONTROL VIN DESCRIPTION The TK112xxB 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 80 mV (typ.) at 30 mA load current. The TK112xxB has a very low quiescent current of 170 µA at no load and 1 mA with a 30 mA load. The standby current is typically 100 nA. The internal thermal shut down circuitry limits the junction temperature to below 150 °C. The load current is internally monitored and the device will shut down in the presence of a short circuit or overcurrent condition at the output. The TK112xxB is available in either a 6-pin SOT-23L or a 5-pin SOT-89 surface mount package. ORDERING INFORMATION TAPE/REEL CODE L: Tape Left (SOT-23L) B: Tape Left (SOT-89) TEMP. CODE: C: -30 to +80 C I: -40 to +85 C Tape/Reel Code TK112 B Voltage Code Package Code PACKAGE CODE: M: SOT-23L U: SOT-89 NOTE 1: 1.3 V to 1.9 V available in SOT-23L package only. NOTE 2: 1.3 V to 2.4 V available in C temperature code (-30 to +80 C) only. VOLTAGE CODE 13 = 1.3 V 33 = 3.3 V 14 = 1.4 V 34 = 3.4 V 15 = 1.5 V 35 = 3.5 V 16 = 1.6 V 36 = 3.6 V 17 = 1.7 V 37 = 3.7 V 18 = 1.8 V 38 = 3.8 V 19 = 1.9 V 39 = 3.9 V 20 = 2.0 V 40 = 4.0 V 21 = 2.1 V 41 = 4.1 V 22 = 2.2 V 42 = 4.2 V 23 = 2.3 V 43 = 4.3 V 24 = 2.4 V 44 = 4.4 V 25 = 2.5 V 45 = 4.5 V 26 = 2.6 V 46 = 4.6 V 27 = 2.7 V 47 = 4.7 V 28 = 2.8 V 48 = 4.8 V 29 = 2.9 V 49 = 4.9 V 30 = 3.0 V 50 = 5.0 V 31 = 3.1 V 55 = 5.5 V 32 = 3.2 V 80 = 8.0 V Temp. Code 20P NOISE BYPASS VIN VOUT THERMAL PROTECTION BANDGAP REFERENCE CONTROL GND SOT-23L SOT-89 VOLTAGE REGULATOR WITH ON/OFF SWITCH |
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