ZCC7008B 3.3V/8A Synchronous Step-down Converter替代RT6258B

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ZCC7008B 3.3V/8A Synchronous Step-down Converter替代RT6258B [复制链接]

The ZCC7008B operates at high efficiency over a wideoutput current load range with fixed 3.3V output voltageand capable of delivering 8A load current. lt supports awide range input voltage from 4.5V to 23V.AdaptiveConstant-On-Time (COT) control mode provides fasttransient response, eases loop stabilization, andoperates with a low-cost electrolytic capacitorZCC7008B also integrate a 100mA LDO and bypassswitch for efficiency improving.ZCC7008B provides complete enable control, under/overvoltage protect, short circuit protect, valley current limit,thermal shutdown function features.ZCC7008B provides compact solution for TCON powersystem.

Features

4.5V ~ 23V Input Voltage Range

Fixed 3.3V output voltage

Supports 8-A continuous output current

Integrated 20mQ High side FET and 10m0 low side FET3.3V LDO capable ofsourcing 100mA

Internal +1% reference voltage at 25°C

Integrated bypass switch, typical Ron is 1.50

Internal 0.6ms soft-start

Max switching frequency up to 500kHz

fast transient response with COT control mode

Power good indicator

Ultrasonic Mode

Integrated protections for Uv, Ov, OT, and OCP40°C to +150°C operating junction temperature

AQFN3X3-12 FC Package

Applications

Notebook Computers

Notebook, Tablet Computers

General power supply for 3.3V output