SC1453

POWER MANAGEMENT Description The SC1453 is a low dropout linear regulator that operates from a +2.5V to +6.5V input range and delivers up to 150mA. A PMOS pass transistor allows the low 75µA supply current to remain independent of load, making these devices ideal for battery operated portable equipment such as cellular phones, cordless phones and personal digital assistants. 150mA Ultra Low Dropout Regulator with Low Noise Bypass PRELIMINARY Features u “2982/5205” compatible pinout u Guaranteed 150 mA output current u Very small external components - designed to work with ceramic capacitors Low 25µVRMS output noise Very low supply current Thermal overload protection Reverse battery protection Low power shutdown Full industrial temperature range Surface mount packaging (5 pin SOT-23) SC1453 u u u The SC1453 has a bandgap reference bypass pin for u very low noise operation - a 10nF (typ.) capacitor is u connected between this pin and ground. Other features u include low powered shutdown, short circuit protection, u thermal shutdown protection and reverse battery protection. The SC1453 comes in the tiny 5 lead SOT-23 package. Applications u u u u u u u Battery Powered Systems Cellular Telephones Cordless Telephones Personal Digital Assistants Portable Instrumentation Modems PCMCIA cards Typical Application Circuit U1 VIN C1 1uF 1 3 IN EN SC1453 OUT GND BYP 2 5 4 VOUT C3 1uF C2 10nF Revision 2, December 2000 1 www.semtech.com SC1453 POWER MANAGEMENT Absolute Maximum R...