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ST750A_07 PDF预览

ST750A_07

更新时间: 2024-02-19 13:34:37
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意法半导体 - STMICROELECTRONICS /
页数 文件大小 规格书
14页 266K
描述
Adjustable step-down, current-mode PWM DC-DC converters

ST750A_07 数据手册

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ST750A  
Adjustable step-down, current-mode PWM DC-DC converters  
Features  
Up to 450mA load currents  
200kHz high-frequency current-mode PWM  
85% to 96% efficiencies  
33mH or 100mH pre-selected inductor value,  
no component design required  
SO-8  
0.8mA quiescent current  
0.3µA shutdown supply current  
Adjustable output voltage  
Overcurrent, soft-start and undervoltage  
provides precise output regulation and excellent  
transient responses. Output voltage accuracy is  
guaranteed to be 4.5% plus feedback resistor  
tolerance over line, load, and temperature  
variations.  
lockout protection  
Cycle-by-cycle current limiting  
Package available: SO-8  
Fixed-frequency switching and absence of sub-  
harmonic ripple allows easy filtering of output  
ripple and noise, as well as the use of small  
external components. This regulators require only  
a single inductor value to work in most  
applications, so no inductor design is necessary.  
Typical applications are: Cellular phones &  
radios, portable Instruments, Portable  
Communications Equipment and Computer  
Peripherals.  
Description  
The ST750A is an adjustable output CMOS, step-  
down switching regulator. The ST750A accepts  
inputs between 4V and 11V and delivers 450mA.  
Typical efficiencies are 85% to 96%.  
Quiescent supply current is 0.8mA and only  
0.3mA in shutdown mode. The output does not  
exhibit frequency over this specified range. Pulse-  
width modulation (PWM) current-mode control  
Order code  
Part number  
Packaging  
ST750AC  
ST750ACDTR  
May 2007  
Rev. 3  
1/14  
www.st.com  
14  

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