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GRM32ER71H475K PDF预览

GRM32ER71H475K

更新时间: 2024-09-13 12:23:39
品牌 Logo 应用领域
立锜 - RICHTEK 转换器
页数 文件大小 规格书
13页 337K
描述
5A, 32V, 500kHz Step-Down Converter

GRM32ER71H475K 数据手册

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RT8289  
5A, 32V, 500kHz Step-Down Converter  
General Description  
Features  
z High Output Current up to 5A  
The RT8289 is a step-down regulator with an internal Power  
MOSFET. It achieves 5Aof continuous output current over  
a wide input supply range with excellent load and line  
regulation. Current mode operation provides fast transient  
response and eases loop stabilization.  
z Internal Soft-Start  
z 100mΩ Internal Power MOSFET Switch  
z Internal Compensation Minimizes External Parts  
Count  
z High Efficiency up to 90%  
The RT8289 prorides protections such as cycle-by-cycle  
current limiting and thermal shutdown. In shutdown mode,  
the regulator draws 25A of supply current.  
z 25μA Shutdown Current  
z Fixed 500kHz Frequency  
z Thermal Shutdown Protection  
The RT8289 requires a minimum number of external  
components, to proride a compact solution.  
z Cycle-by-Cycle Over Current Protection  
z Wide 5.5V to 32V Operating Input Range  
z Adjustable Output Voltage from 1.222V to 26V  
z Available in an SOP-8 (Exposed Pad) Package  
z RoHS Compliant and Halogen Free  
The RT8289 is available in a SOP-8 (Exposed Pad)  
package.  
Ordering Information  
RT8289  
Applications  
z Distributive Power Systems  
Package Type  
SP : SOP-8 (Exposed Pad-Option 1)  
z LCD TV  
Lead Plating System  
G : Green (Halogen Free and Pb Free)  
Note :  
z DSL Modems  
z Pre-regulator for Linear Regulators  
z Battery Charger  
Richtek products are :  
` RoHS compliant and compatible with the current require-  
ments of IPC/JEDEC J-STD-020.  
Pin Configurations  
(TOP VIEW)  
` Suitable for use in SnPb or Pb-free soldering processes.  
8
BOOT  
NC  
SW  
VIN  
GND  
EN  
2
3
4
7
6
5
GND  
NC  
9
FB  
SOP-8 (Exposed Pad)  
Typical Application Circuit  
1
8
7
5
V
IN  
BOOT  
RT8289  
VIN  
5.5V to 32V  
C
10nF  
L
C
BOOT  
IN  
10µH  
4.7µF x 2  
V
OUT  
SW  
5V/5A  
Chip Enable  
D
EN  
R1  
B550C  
10k  
C
OUT  
Open  
= Automatic Startup  
4
47µFx2  
(POSCAP)  
6, Exposed Pad (9)  
FB  
GND  
R2  
3.16k  
DS8289-01 March 2011  
www.richtek.com  
1

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