Products - Step-Down

XC9280 18V, 3A Synchronous Step-Down DC/DC Converter

18V, 3A Synchronous Step-Down DC/DC Converter image


Property XC9280
Output Current 3A peak
Input Voltage 4.5 ~ 18V
Output Voltage 1.8 ~ 7.0V
Oscillation Frequency 1.2MHz
Packages TSOT-26

Product Description

18V, 3A Synchronous PWM/PFM Step-Down DC/DC Converter

The XC9280 is a 18V, 3A peak current synchronous step-down DC/DC converter. Switching control is automatic PWM/PFM and up to 2A continuous current can be supported (VIN=12V, VOUT=5V) in addition to the 3A peak.

Operating between 4.5V ~ 18V, output voltages from 1.8V ~ 7.0V can be set externally using two resistors (RFB1, RFB2). The DC/DC is compatible with low ESR ceramic capacitors.

The XC9280 has a switching frequency of 1.2MHz which enables it to be used with a small 2.2μH coil. The higher switching frequency reduces the required mounting area needed on the PCB by 25% in comparison to similar existing products.

The series features a built-in soft-start function (externally adjustable) which is effective for preventing output capacity inrush and output voltage start-up delays. Over current protection (auto recovery) and thermal shutdown are also included.

The XC9280 is available in a compact TSOT-26 package (2.8 x 2.9 x 1.1mm) which gives a 70% smaller package area per unit when compared to similar DC/DC products.