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IR3638STRPBF Datasheet, PDF (1/15 Pages) International Rectifier – HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER FOR TRACKING APPLIACTIONS | |||
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Data Sheet No.PD94724
IR3638SPbF
HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
FOR TRACKING APPLIACTIONS
Features
⢠Power up Sequencing / Tracking
⢠Enable Input
⢠Internal 400kHz Oscillator
⢠Programmable Soft-Start
⢠Fixed Frequency Voltage Mode
⢠Output Voltage as low as 0.6V
Applications
⢠Tracking Applications
⢠Game Consoles
⢠Computing Peripheral Voltage Regulators
⢠Graphics Cards
⢠General DC/DC Converters
Description
The IR3638 controller IC is designed to provide a
simple synchronous Buck regulator for on-board
DC to DC applications in a 14-pin SOIC. The
IR3638 is designed specifically for tracking
applications by providing the track input.
The IR3638 operates at a fixed internal 400kHz
switching frequency allowing the use of small
external components.
The device features a programmable soft start set
by an external capacitor, under-voltage lockout
and output under-voltage detection that latches
off the device when an output short is detected.
12V
5V
C1
C2
C3
Vcc
Vc
HDrv
V_CPUCore
C6
D1
Vp / Enable
LDrv
SS
PGnd
Fb
Comp
C4
Gnd
C5
R3
Q1
L1
Q2
R1
R2
Vout
C7
3/19/07
Fig. 1: Typical Application Circuit
ORDERING INFORMATION
PKG PACKAGE
DESIG DESCRIPTION
S
IR3638STRPbF
PIN
PARTS
COUNT PER TUBE
14
----
PARTS
PER REEL
2500
T&R
ORIANTAION
Figure A
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