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2022-09-24 23:33:15
MCP1252 - Low Noise, Positive Regulated Charge Pump
MCP1252/3 Inductor, Forward Regulating Charge Pump DC/DC Converters. These devices produce a regulated fixed or adjustable output (3.3V or 5.0V) voltage. They are specially designed for applications requiring low noise, high efficiency, and can deliver up to 120 mA of output current. The device allows automatic switching between input voltages lower or higher than output voltages, and automatic switching between buck/boost operations. The MCP1252 switches at 650 kHz to avoid interference with the sensitive IF band. “The MCP1253 has a 1 MHz switching frequency and allows the use of smaller capacitors than the MCP1252, saving board space and cost. Both devices have a power good output that can be used to detect regulation conditions. Very low supply current and low external The component count (three capacitors) makes these devices small and ideal for battery powered applications. Shutdown mode is also provided for further power reduction. The MCP1252 and MCP1253 feature thermal and short circuit protection and are available in a space saving MSOP package, 8-pin, Bag.
Applications • White LED Backlight • Color Display Bias • Local 3V-5V Conversion • Flash Memory Supply Voltage • Power Interface for GSM Cell Phone SIM Card • Smart Card Reader • PCMCIA Self-Supply 5V Power Supply