ZCC7008B-23V 8A同步降压 替代RT6258B

四维电子

3.3V/8A Synchronous Step-down Converter
8 J, a) u: l8 y" |2 u, w8 ^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
. c4 b+ h, o2 M# {$ zSupports 8-A continuous output current
7 x1 J; \0 n- M+ dIntegrated 20mQ High side FET and 10m0 low side FET3.3V LDO capable ofsourcing 100mA
& D9 _  g/ |2 h4 u9 YInternal +1% reference voltage at 25°C
Integrated bypass switch, typical Ron is 1.50
& _; p/ c" n0 q5 n) e8 t, PInternal 0.6ms soft-start
Max switching frequency up to 500kHz
fast transient response with COT control mode
$ C2 N3 p8 ], V+ MPower good indicator
& H4 Q* d0 x8 I" v* BUltrasonic Mode
Integrated protections for Uv, Ov, OT, and OCP40°C to +150°C operating junction temperature
" `. L' @+ z5 gAQFN3X3-12 FC Package
0 D& c2 i! ~! @Applications
/ T7 }" A1 ?1 u  u% H+ gNotebook Computers
Notebook, Tablet Computers
General power supply for 3.3V output
9 ~; @. v# Z3 i* Y+ ]: ^+ q1 Q2 R+ R