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.

FEATURES
■High Voltage Precision at ±2.0%
■Active High On/Off Control
■Very Low Dropout Voltage 80 mV at 30 mA
■Very Low Noise
■Very Small SOT-23L or SOT-89 Surface Mount Packages
■Internal Thermal Shutdown
■Short Circuit Protection

APPLICATIONS
■Battery Powered Systems
■Cellular Telephones
■Pagers
■Personal Communications Equipment
■Portable Instrumentation
■Portable Consumer Equipment
■Radio Control Systems
■Toys
■Low Voltage Systems