描述 Description

The uP9625 is a high-efficiency, single synchronous buckconverter with an internal power switch. With internal lowRDS(ON) switches, the high-efficiency buck converter iscapable of delivering up to 7A output current for chargerinterface. The proprietary RCOTTM technology provides fasttransient response and high noise immunity. When thereis a ripple injection circuit, it can support ceramic andOSCON output capacitors for low ESR application. Thiscombination is ideal for building modern low duty ratio,untra-fast load step response DC-DC converters. The outputvoltage ranges from 2.9V to 21V, and the conversion inputvoltage ranges is from 6V to 32V. The quasi-constantswitching frequency is 100kHz. RCOTTM control tracks the100kHz switching frequency over a wide range of input andoutput voltages, while it increases the switching frequencyat step-up of load.

The strong gate drivers of the uP9625 allow low RDS(ON)FETs for high current applications. It is available in spacesaving WQFN4x4-26L and WQFN4x4-32L packages.

特性 Features

·Input Voltage Absolute Maximum Rating: 40V
·Wide Input Voltage Range: 6V to 32V
·Input Over Voltage Protection: 35V (typ.)
·Output Voltage Range: 2.9V to 21V
·Wide Output Load Range: 0A to 7A
·Built-In 1% 1V Reference
·RCOTTM (Robust Constant On-Time) Control Architecture
·Quasi-Constant Switching Frequency Operation: 100kHz
·1ms, 2ms, 4ms and 8ms Selectable Output Voltage Soft-Start
·Pre-charged Start-up Capability
·Built-in Output Discharge
·Built-in VIN OVP/Output UVP/OCP/OTP
·Available in WQFN4x4-26L and WQFN4x4-32L Packages
·RoHS Compliant and Halogen Free

應用 Application

·Portable Charging Devices
·Point-of-Load Systems
·Notebook Computers
·I/O Supplies
·System Power Supplies