Low Dropout Regulator
April 2007
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The MCP1702 low dropout regulator (LDO) is a 250 mA LDO with low quiescent current, high input voltage, over-voltage protection, and thermal shutdown on a single chip. The LDO is said to be ideal for applications requiring long battery run-times and high tolerance for input-voltage variations, such as smoke detectors, fire alarms and commercial and residential thermostats. With a low quiescent current of 2 ÌA, the regulator requires only a small amount of current to maintain regulation, thereby extending battery run times. The unit supports input voltages up to 13.2 V, meaning that standard 9 V alkaline batteries can be used to help keep costs low. The regulator also features device- and circuit-protection capabilities such as overcurrent protection and thermal shutdown, enabling users to more effectively avoid system failures. The device is available in small, 3-pin SOT-89, SOT-23 and TO-92 packages. Microchip Technology Inc.

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