TK11930

TK119xx VOLTAGE REGULATOR WITH RESET OUTPUT FEATURES s s s s s s s s s Very Low Dropout Voltage Reset Output for Microprocessor Very Low Quiescent Current (No Load) Internal Thermal/Overload Shutdown Low Noise Voltage Input and Output Voltage Sense ± 2.5 % Output Voltage Accuracy CMOS or TTL On/Off Control High Speed On/Off Transient (50 µs typ.) FEATURES s s s s s s s s s Battery Powered Systems Cellular Telephones Pagers Personal Communications Equipment Portable Instrumentation Portable Consumer Equipment Radio Control Systems Toys Low Voltage Systems DESCRIPTION The TK119xx series are low power, linear regulators with built-in electronic switches. Built-in voltage comparators provide a reset logic ”low” level whenever the input or output voltage falls outside internally preset limits. The internal electronic switch can be controlled by CMOS or TLL levels. The device is in the “off” state when the control pin is biased “high”. An internal PNP pass-transistor is used in order to achieve low dropout voltage (typically 200 mV at 50 mA load current). The device has very low quiescent current (130 µA) in the “on” mode with no load and 2 mA with 30 mA load. The quiescent current is typically 4 mA at 60 mA load. The current consumption in the “off” mode is 65 µA. An internal thermal shutdown circuit limits the junction temperature to below 150 oC. The load current is internally monitored and the device will shut down (no load current) in the presence of a short circuit at the o...