參數(shù)資料
型號(hào): IRU3137
廠商: International Rectifier
英文描述: 8-PIN SYNCHRONOUS PWM CONTROLLER
中文描述: 8引腳同步PWM控制器
文件頁(yè)數(shù): 1/19頁(yè)
文件大小: 169K
代理商: IRU3137
IRU3137
1
Rev. 1.0
06/22/04
www.irf.com
DESCRIPTION
The IRU3137 controller IC is designed to provide a low
cost and high performance synchronous Buck regulator
for on-board DC to DC converter applications. The out-
put voltage can be set as low as 0.8V and higher voltage
can be obtained with an external voltage divider. High
peak current gate drivers provide fast switching transi-
tion for applications requiring high output current in the
range of 15A to 20A.
This device features an internal 200KHz oscillator, un-
der-voltage lockout for both Vcc and Vc supplies, an
external programmable soft-start function as well as
output under-voltage detection that latches off the de-
vice when an output short is detected.
1A Peak Output Drive Capability
0.8V Reference Voltage
Shuts off both drivers at shorted output
and shutdown
Operating with single 5V or 12V supply voltage
Stable with ceramic capacitors
Internal 200KHz Oscillator
Soft-Start Function
Protects the output when control FET is shorted
Synchronous Controller in 8-Pin Package
APPLICATIONS
DDR Memory Application
Low voltage distributed DC-DC
Graphic Cards
Low cost on-board DC to DC such as 5V to 2.5V,
1.8V or 0.8V
PACKAGE ORDER INFORMATION
T
A
(°C)
0 To 70
FEATURES
8-PIN SYNCHRONOUS PWM CONTROLLER
DEVICE PACKAGE FREQUENCY
IRU3137CS 8-Pin Plastic SOIC NB (S) 200KHz
Data Sheet No. PD94700
Figure 1 - Typical application of IRU3137.
TYPICAL APPLICATION
IRU3137
U1
Vcc
Vc
HDrv
LDrv
Fb
Gnd
Comp
SS/SD
C3
1uF
C4
1uF
C8
0.1uF
C9
3300pF
R4
30K
Q1
IRF7832
Q2
IRF7832
R5
1K, 1%
R3
2.15K
L2
2.2uH
L1
1uH
C2
4x 150uF
C1
47uF
2.5V
@ 15A
C7
3x 330uF
40m
, Poscap
12V
5V
Optional
D1
Optional
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相關(guān)代理商/技術(shù)參數(shù)
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IRU3137CS 制造商:IRF 制造商全稱:International Rectifier 功能描述:8-PIN SYNCHRONOUS PWM CONTROLLER
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