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SC5205-4.0CSKTR Datasheet(PDF) 1 Page - Semtech Corporation |
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SC5205-4.0CSKTR Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 5 page 1 www.semtech.com SC5205 150mA Ultra Low Dropout, Low Noise Micropower Linear Regulator POWER MANAGEMENT PRELIMINARY Revision 1, January 2001 The SC5205 is a 150mA 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. The SC5205 uses a Semtech proprietary internal PNP device for the pass element, providing a low dropout voltage of 165mV at a load of 150mA, while maintaining a ground pin current of 2750µA. The output noise is reduced by placing a 10nF capacitor on pin 4 (bypass). Each device contains a bandgap reference, error amplifier, PNP pass element, thermal and current limiting circuitry and resistor divider network for setting output voltage. The SC5205 is packaged in a 5 pin SOT-23 surface mount package for a very small footprint and it requires only a 1µF capacitor on the output and a 0.01µF on the bypass pin for a minimum amount of external components. u Ultra low dropout voltage - 165mV @ 150mA u Guaranteed 150mA output current u Low ground pin current at all loads u <5µA quiescent current in shutdown u Wide input supply voltage range 2.5V to 16V in u Wide output voltage range u Excellent line regulation u Industrial temperature range u Surface mount packaging (5 pin SOT-23) u Battery Powered Systems u Cellular Telephones u Cordless Telephones u Pagers u Personal Digital Assistants u Portable Instrumentation u Cameras u Portable Consumer Equipment u PCMCIA cards EN VIN VO + C1 1uF U1 SC5205 1 2 3 4 5 VIN GND EN BYP VO + C3 1uF C2 10nF Description Features Applications Typical Application Circuit Notes: (1) C IN (C1) is needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value of 1.0µF or greater should be used. C IN may be tantalum or aluminum electrolytic. (2) C O (C3) should be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will improve the overall transient response. (3) C BYP (C2 - required) should be placed as close as possible to pin 4 and ground. A 10nF ceramic capacitor is recommended. (4) EN may be tied to V IN if the shutdown feature is not required. Maximum EN voltage = VIN. |
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