TK112xxA

FEATURES
High Voltage Precision at ± 2.4%
Active High On/Off Control
Very Low Dropout Voltage 80 mV at 30 mA
Very Low Noise
Very Small SOT-23L or SOT-89-5 Surface Mount
Packages
Internal Thermal Shutdown
Short Circuit Protection

The TK112xxA is a low dropout linear regulator with a builtin 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 mVrms. 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 mA at no load and 1 mA with a 30 mA load. The standby current istypically 100 nA. The internal thermal shutdown circuitrylimits 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.