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SGM61233

更新时间： 2024-03-03 10:11:25
品牌 Logo 应用领域
圣邦微 - SGMICRO /
页数 文件大小 规格书
25页 1216K
描述
4.5V to 28V Input, 3A Output, Synchronous Buck Converter

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SGM61233 数据手册

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SGM61233  
4.5V to 28V Input, 3A Output,  
Synchronous Buck Converter  
GENERAL DESCRIPTION  
FEATURES  
The SGM61233 is  
a
current mode controlled  
● 4.5V to 28V Input Voltage Range  
● 0.8V Internal Voltage Reference  
● Typical 320μA Quiescent Current  
● Typical 2μA Shutdown Current  
● Integrated 118mΩ and 81mΩ MOSFETs Support  
up to 3A Continuous Output Current  
● SGM61233A: Internal 2ms Soft-Start,  
50kHz to 1500kHz Adjustable Frequency  
● SGM61233B: Adjustable Soft-Start,  
Fixed 340kHz Frequency  
synchronous Buck converter with 4.5V to 28V input  
range and 3A rated output current. The quiescent  
current is 320μA (TYP) and the shutdown supply  
current is 2μA (TYP). Two MOSFETs with low RDSON are  
integrated to improve the efficiency. Efficiency is  
maximized through power-save mode (PSM) at light  
load. The SGM61233A has a wide selectable switching  
frequency (50kHz to 1500kHz) to allow desired tradeoff  
between efficiency and component sizes. The  
SGM61233B has adjustable soft-start time for flexible  
application. The SGM61233C has a fixed 340kHz  
switching frequency and a fixed internal 2ms soft-start  
time.  
● SGM61233C: Internal 2ms Soft-Start,  
Fixed 340kHz Frequency  
● High Light-Load Efficiency  
● Hiccup Mode Over-Current Protection  
● Over-Voltage Protection  
● Thermal Shutdown Protection  
● Available in Green SOIC-8 (Exposed Pad) and  
TDFN-3×3-10L Packages  
The UVLO level can be adjusted (increased) by an  
external resistor divider. Secure operation in overload  
conditions is ensured by cycle-by-cycle current limit,  
hiccup protection and thermal shutdown protection.  
The low-side MOSFET has sinking current limit to  
prevent excessive reverse current.  
APPLICATIONS  
Industrial Power Supplies  
Distributed Power Bus Supplies  
LCD Display  
The SGM61233 is offered in the Green SOIC-8  
(Exposed Pad) and TDFN-3×3-10L packages.  
CPE Equipment  
Set-Top Displays  
Battery Chargers  
TYPICAL APPLICATION  
VIN  
VIN  
VIN  
BOOT  
VIN  
EN  
BOOT  
PH  
CBOOT  
CBOOT  
LO  
LO  
CIN  
CIN  
VOUT  
CO  
VOUT  
CO  
EN  
PH  
SGM61233A  
RT  
SGM61233B  
SS  
RO1  
RO1  
COMP VSENSE  
COMP VSENSE  
CSS  
RT  
CCOMP1  
CCOMP1  
RO2  
RO2  
CCOMP2  
AGND  
PGND  
CCOMP2  
AGND  
PGND  
RCOMP  
RCOMP  
Figure 1. Typical Application Circuits  
SG Micro Corp  
www.sg-micro.com  
JULY 2023–REV. A  
1234567...25

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