TK11537

TK115xx VOLTAGE REGULATOR WITH ON/OFF SWITCH FEATURES s s s s s s s s Low Dropout Voltage Pass Transistor Terminals Available Very Low Standby Current ( ON, No Load) Very Low (<200 nA) Current in OFF Mode Low Output Noise Internal Thermal Shutdown Short Circuit Protection Available on Tape and Reel APPLICATIONS s s s s s s s s s Cordless Telephones Pagers Battery Powered Systems Personal Communications Equipment Portable Instrumentation Radio Control Systems Toys Low Voltage Systems Portable Consumer Equipment DESCRIPTION The TK115xx series devices are low power, linear regulators with electronic ON/OFF switches. Both active HIGH and active LOW control pins are provided. An internal PNP pass-transistor is used in order to achieve low dropout voltage (typically 200 mV at 80 mA load current). A base drive is available at pin 7 for connection of an external pass transistor should higher current (up to 1 A) or lower dropout voltage is required. An internal thermal shutdown circuit 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 at the output. The TK115xx series is available in plastic surface mount SOP-8 packages. TK115xxM VIN 1 8 7 6 5 VO BASE GND VADJ ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................... 16 V Load Current ....................................................... 180 mA Power Dissipation (Note 1) ..................