TK11146SIL

 High Voltage Precision at ± 2.0% or ± 60 mV
 Active High On/Off Control
 Very Low Dropout Voltage (85 mV at 30 mA)
Very Low Noise
 Miniature Package (SOT-23-5)
 Internal Thermal Shutdown
Short Circuit Protection
 Excellent Ripple Rejection (70 dB @ 1 kHz)
Reverse Bias Protection

Supply Voltage ......................................................... 16 V
Control Terminal Voltage .......................................... 12 V
Noise Bypass Terminal Voltage .................................. 5 V
Power Dissipation (Note 1) ................................. 500 mW
Reverse Bias ............................................................ 10 V
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-30 to +80 °C
Operating Voltage Range................................ 1.8 to 12 V
Junction Temperature ........................................... 150 °C
Lead Soldering Temperature (10 s) ...................... 235 °C

The TK111xxS 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 Vrms.

An internal PNP pass transistor TK111xxS is used to achieve a low dropout voltage of 85 mV (typ.) at 30 mA load current. The TK111xxS has a very low quiescent current of 140 mA (typ.) at no load . The standby current is 100 nA maximum. 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.