XRP7675中文资料3A, 18V PFM/PWM Step-Down Regulator数据手册MaxLinear规格书

描述 Description

The XRP7675 is a 3A capable synchronous current-mode PWM step-down (buck) voltage regulator with improved light current load efficiency. A wide 4.5V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails.
With a 340kHz constant operating frequency and integrated high and low-side 100mΩ/100mΩ MOSFETs, the XRP7675 reduces the overall component count and solution footprint. Current-mode control provides fast transient response and cycle-by-cycle OCP. An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 0.1µA. At light current loads, the XRP7675 operates in Discontinuous Conduction Mode (DCM) and is complemented by a Pulse Frequency Modulation (PFM) mode to provide excellent conversion efficiency.
Built-in output overvoltage (open load), over temperature, cycle-by-cycle over-current, undervoltage lockout (UVLO) and hiccup mode short-circuit protection insures safe operation under abnormal operating conditions.
The XRP7675 is offered in a RoHS compliant, \"green\"/halogen free 8-pin exposed pad SOIC package.

特性 Features

·3A continuous output current
·4.5V to 18V wide input voltage·0.925V to 16V adjustable output voltage
·2% accuracy

·PWM current mode control·340kHz constant operations
·Up to 95% efficiency

·Light load efficiency
·Programmable soft-start and enable function
·Built-in thermal, overcurrent, UVLO and output overvoltage protections
·Pin/function upgrade to Exar XRP7665 and MPS MP1484/2307
·RoHS compliant, \"green\"/halogen free 8-pin SOIC package

应用 Application

·Distributed power architecture
·Energy Star compliant equipment
·Portable equipment
·Point of Load (POL) converter
·Audio video equipment