The XC9253R series is a group of synchronous-rectification type DC/DC converters with a built-in 0.6ΩP-channel driver transistor and 0.7ΩN-channel switching transistor, designed to allow the use of ceramic capacitors. The ICs enable a high efficiency, stable power supply with an output current of 500mA to be configured using only a coil and two capacitors connected externally. Minimum operating voltage is 2.0V~6.0V. Output voltage is 3.3V(accuracy: ±2.0%). With the built-in oscillator, oscillation frequency is set to 600kHz. As for operation mode, the XC9253R series is automatic PWM/PFM switching control allowing fast response, low ripple and high efficiency.
The XC9253R series from Torex Semiconductor is a synchronous‑rectification DC/DC converter that integrates a 0.6 Ω P‑channel driver and a 0.7 Ω N‑channel switching transistor. It operates from 2.0 V to 6.0 V input and provides a regulated 3.3 V output (±2 %) with up to 500 mA load current. The built‑in oscillator runs at 600 kHz (±15 %) and the device automatically switches between PWM and PFM modes for high efficiency and low ripple.
The device is supplied in SOT‑25 and USP‑6B packages, supports low‑ESR ceramic capacitors, and includes UVLO, soft‑start, and current‑limit functions. Typical applications include mobile phones, Bluetooth equipment, PDAs, portable game consoles, digital cameras, cordless phones and notebook computers.
| Input Voltage Range | 2.0 V – 6.0 V |
|---|---|
| Output Voltage | 3.3 V ±2 % |
| Oscillation Frequency | 600 kHz ±15 % |
| Package Types | SOT‑25, USP‑6B |
| P‑channel Driver ON Resistance | 0.6 Ω |
| N‑channel Switch ON Resistance | 0.7 Ω |
It operates from 2.0 V up to 6.0 V input.
Typical efficiency is 92 % when VIN=4.5 V and IOUT=100 mA.
The devices are offered in SOT‑25 and USP‑6B surface‑mount packages.