The MCP1252/3 are inductorless, positive-regulated charge pump DC/DC converters. The devices generate a regulated fixed (3.3V or 5.0V) or adjustable output voltage. They are specifically designed for applications requiring low noise and high efficiency and are able to deliver up to 120 mA output current. The devices allow the input voltage to be lower or higher than the output voltage, by automatically switching between buck/boost operation. The MCP1252 has a switching frequency of 650 kHz, avoiding interference with sensitive IF bands. The MCP1253 has a switching frequency of 1 MHz and allows for higher conversion efficiency.
The MCP1252/3 are inductorless, positive‑regulated charge‑pump DC/DC converters that provide fixed (3.3 V or 5.0 V) or adjustable output voltages. They deliver up to 120 mA output current, operate from 2.0 V to 5.5 V input, and feature low noise, high efficiency, and built‑in protection.
The document includes electrical characteristics, pin functions, typical performance curves, package information, and application notes such as LED backlighting, GSM SIM supply, and local 3 V‑to‑5 V conversion.
| Supply Voltage (Vin) | 2.0 V – 5.5 V |
|---|---|
| Switching Frequency | 650 kHz (MCP1252) / 1 MHz (MCP1253) |
| Output Voltage Accuracy | ±2.5 % (fixed) |
| Shutdown Current | 0.1 µA (typical) |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 8‑Lead MSOP |
The MCP1252 operates at a switching frequency of 650 kHz.
The typical shutdown current is 0.1 µA.
They accept an input voltage from 2.0 V to 5.5 V.