ZCC7008B-23V 8A同步降压 替代RT6258B

四维电子

3.3V/8A Synchronous Step-down Converter
5 k5 r8 r& G6 b: w, vThe 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
" `. ~  T1 V3 n4.5V ~ 23V Input Voltage Range
Fixed 3.3V output voltage
9 q6 g% v( j4 X( I' w* x. q  vSupports 8-A continuous output current
9 b! o. T% L! r8 VIntegrated 20mQ High side FET and 10m0 low side FET3.3V LDO capable ofsourcing 100mA
+ Q: z  `/ J- Q; l+ I- \Internal +1% reference voltage at 25°C
Integrated bypass switch, typical Ron is 1.50
& |4 `+ L" V, a0 ?3 y. h3 `Internal 0.6ms soft-start
' s( D$ ^. ^; y  {$ {1 v! OMax switching frequency up to 500kHz
fast transient response with COT control mode
2 {/ B4 Q2 K) G& p$ h6 ePower good indicator
Ultrasonic Mode
6 W) o7 K7 F+ P1 IIntegrated protections for Uv, Ov, OT, and OCP40°C to +150°C operating junction temperature
* n1 c- ?. B) bAQFN3X3-12 FC Package
Applications
' o3 b: C! w1 `! c- M, E0 M$ jNotebook Computers
4 C" q% @% g+ u0 X" J/ c3 K. BNotebook, Tablet Computers
General power supply for 3.3V output