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SC1457ISKX.XTRT Datasheet(PDF) 1 Page - Semtech Corporation |
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SC1457ISKX.XTRT Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 13 page  1 www.semtech.com SC1457 150mA Ultra Low Dropout Regulator with Undervoltage Flag POWER MANAGEMENT Revision: November 10, 2004 The SC1457 is a low dropout linear regulator that operates from a +2.25V 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. The SC1457 has very low dropout voltage (typically 1.1mV at light loads and 150mV at 150mA) with better than 1.5% initial output voltage accuracy. It has a logic compatible enable control input and an internal output undervoltage monitor. Designed especially for hand held, battery powered devices, the SC1457 can be switched by a CMOS or TTL compatible logic signal. When disabled, power consumption drops nearly to zero. Other features include short circuit protection, thermal shutdown protection and reverse battery protection. The SC1457 is available in several fixed voltages in the tiny 5 lead SOT-23 package and the ultra low profile 5 lead TSOT-23. Guaranteed 150mA output current Error flag indicates output undervoltage fault 2% output accuracy guaranteed over line, load and temperature Very small external components - designed to work with ceramic capacitors Low 110µV RMS output noise Very low supply current Thermal overload protection Reverse battery protection Low power shutdown Full industrial temperature range Very low profile packaging available (1mm max. height) Surface mount packaging (SOT-23-5 and TSOT-23-5) VIN VO UNDERVOLTAGE FLAG C2 1uF C1 1uF U1 SC1457 1 2 3 4 5 IN GND EN FLG OUT R1 100k Description Features Applications Battery Powered Systems Cellular Telephones Cordless Telephones Personal Digital Assistants Portable Instrumentation Modems PCMCIA cards Typical Application Circuit |
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