TK717xxS

Features:

Very Good Stability  (CL = 0.22F is Stable For Any Type Capacitor withV_OUT1.8 V)
Built-in Shunt Circuit of Output to GND. The Stored Energy of the Output Capacitor is Discharged Quickly
Wide Operating Voltage Range (1.8 V ~ 14 V)
Very Low Dropout Voltage (V_DROP= 103 mV at 100 mA)
Peak Output Current is 370 mA (0.3 V DROP Point)
Very Low Quiescent Current (I_Q= 72 uA at I_OUT= 0 mA)
Good Ripple Rejection Ratio (80 dB at 1 kHz)
High Precision Output Voltage (± 1.5 % or ± 50 mV)
Suitable for Very Low Noise Applications
Built-in Active High On/Off Control (0.1A Max Standby Current)
Built-in Short Circuit Protection
Built-in Thermal Shutdown
Very Small Surface Mount Package (SOT23-5)



Application

Battery Powered Systems
Measurement Systems
Mobile Communications Systems
Cordless Phone, PHS, GSM, CDMA
Industrial Equipment
Personal Computers, Barcode Readers


Specifications

Supply Voltage..............................................-0.4 to16 V
Power Dissipation (Note 1)................................500 mW
Reverse Bias Voltage.....................................-0.4 to 6 V
Operating Voltage Range..............................1.8 to 14 V
Storage Temperature Range....................-55 to+150°C
Operating Temperature Range...................-30 to+80°C
Noise Bypass Pin Voltage.................................0.4 to 5V
Control Pin Voltage.......................................-0.4 to 16V
Short Circuit Current...........................................410 mA

Description

TK717xxS 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. In the OFF state, the output impedance becomes very low, quickly discharging the output capacitor. An external capacitor can be connected to the noise bypass pin to lower the output noise level to 30 ~ 50V_RMS. An internal PNP pass transistor is included to achieve a low dropout voltage of 103 mV at 100 mA load current.  The TK717xx has an exceptionally low quiescent current of 72A at no load and 0.8 mA with a 50 mA load. The standby current is typically 100 pA. The circuit features very good stability. The ripple rejection is 90 dB at 400 Hz and 80 dB at 1 kHz. Stable operation is achieved with an output capacitor as low as 0.22F; a capacitor of any type may be used. (However, the larger the
output capacitor is, the better the overall characteristics will be.)

The TK717xxS is available in a very small SOT23-5 surface mount package.