The FX5545G008 is a low profile 3mm DC/DC buck converter from Vishay. It has an input voltage range of 0.8V to 4.5V and an output current of 3A. With a power density of over 380W/in3, it achieves high efficiency up to 95%.
The FX5545G008 is a low‑profile 3 mm DC/DC buck converter designed for portable electronics. It operates from 2.5 V to 6 V input and delivers an adjustable output of 0.8 V to 4.5 V at up to 3 A, with a typical output power of 10 W and efficiency up to 95%. The device features fully integrated PWM/PSM control, low output ripple, and a BGA package that supports operation over an industrial temperature range of –40 °C to +85 °C.
Typical applications include cordless phones, PDAs, point‑of‑load supplies for FPGA, microprocessor and DSP drivers, portable computers, battery‑back‑up supplies and cameras. Ordering information, package dimensions, pin configuration and detailed electrical specifications are provided for designers. The datasheet also includes performance graphs for PWM and PSM modes, showing efficiency versus load and temperature.
| Input voltage range | 2.5 V to 6 V |
|---|---|
| Output voltage range | 0.8 V to 4.5 V |
| Maximum output power | 10 W |
| Efficiency | up to 95 % |
| Operating temperature range | -40 °C to +85 °C |
| Maximum output current | 3 A |
| Quiescent current (PSM mode) | 200 µA |
| Ripple and noise | 80 mVpp (DC‑20 MHz) |
| Package weight | 1.4 g |
| Oscillator frequency | 400 kHz |
The converter operates from 2.5 V to 6 V input.
It offers an adjustable output from 0.8 V to 4.5 V.
The device can deliver up to 10 W of output power.
It is rated for operation from –40 °C to +85 °C.