參數(shù)資料
型號(hào): IR3637STRPBF
廠商: International Rectifier
英文描述: 1% ACCURATE SYNCHRONOUS PWM CONTROLLER
中文描述: 1%準(zhǔn)確的同步PWM控制器
文件頁(yè)數(shù): 1/21頁(yè)
文件大?。?/td> 655K
代理商: IR3637STRPBF
IR3637SPBF
1
Rev. 1.1
06/16/05
www.irf.com
TYPICAL APPLICATION
DESCRIPTION
The IR3637 controller IC is designed to provide a simple
synchronous Buck regulator for on-board DC to DC ap-
plications in a small 8-pin SOIC. The output voltage can
be precisely regulated using the internal 0.8V reference
voltage for low voltage applications.
The IR3637 operates at a fixed internal 400kHz switch-
ing frequency to reduce the component size.
The device features under-voltage lockout for both input
supplies, an external programmable soft-start function
as well as output under-voltage detection that latches
off the device when an output short is detected.
0.8V Reference Voltage
Operates with a single 5V Supply Voltage
Internal 400kHz Oscillator
Soft-Start Function
Fixed Frequency Voltage Mode
Short Circuit Protection
APPLICATIONS
Computer Peripheral Voltage Regulator
Memory Power supplies
Graphics Card
Low cost on-board DC to DC
ORDERING INFORMATION
FEATURES
1% ACCURATE SYNCHRONOUS PWM CONTROLLER
Data Sheet No. PD94713
Figure 1 - Typical application of IR3637.
IR3637
Vc
Vcc
HDrv
LDrv
Fb
Gnd
Comp
SS/SD
C3
C2
C4
C5
R1
Q1
Q2
R2
R3
L1
C1
Vout
C6
12V
5V
D1
PKG PACKAGE PIN PARTS PARTS T & R
DESIG DESCRIPTION COUNT PER TUBE PER REEL
Oriantation
S IR3637SPBF 8 95 ------
S IR3637STRPBF 8 ------- 2500
Fig A
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