SC5205 Datasheet | SEMTECH

Description The SC5205 is a 150m A ultra low dropout linear regulator with a built in CMOS/TTL logic level enable switch. It is designed specifically for battery powered applications where low quiescent current and low dropout are critical for battery longevity. 150m A Ultra Low Dropout, Low Noise Micropower Linear Regulator PRELIMINARY Features Ultra low dropout voltage - 165m V @ 150m A Guaranteed 150m A output current Low ground pin current at all loads <5µA quiescent current in shutdown Wide input supply voltage range 2.5V to 16V in Wide output voltage range Excellent line regulation Industrial temperature range Surface mount packaging (5 pin SOT-23) SC5205 u u u u u u The SC5205 uses a Semtech proprietary internal PNP device for the pass element, providing a low dropout u voltage of 165m V at a load of 150m A, while maintaining u u a ground pin current of 2750µA. The output noise is reduced by placing a 10n F capacitor on pin 4 (bypass). Applications Battery Powered Systems Cellular Telephones Cordless Telephones Pagers Personal Digital Assistants Portable Instrumentation Cameras Portable Consumer Equipment PCMCIA cards u u Each device contains a bandgap reference, error u amplifier, PNP pass element, thermal and current u limiting circuitry and resistor divider network for setting u output voltage. u The SC5205 is packaged in a 5 pin SOT-23 surface mount u package for a very small footprint and it requires only a u 1µF capacitor on the output and a 0.01µF on the bypass u pin for a minimum amount of external ponents. Typical Application Circuit U1 SC5205 1 VIN 2 3 EN + C1 1u F VIN GND EN BYP 4 C3 1u F VO 5 VO + C2 10n F Notes: (1) CIN (C1) is needed if the device is far from the supply’s filter capacitors, or for operation from a battery. A value of 1.0µF or greater should be used. CIN may be tantalum or aluminum electrolytic. (2) CO (C3) should be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will improve the overall...