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參數(shù)資料
| 型號： | IRU3072CH |
| 廠商： | International Rectifier |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 20-PIN SYNCHRONOUS PWM CONTROLLER/ 3 LDO CONTROLLER |
| 中文描述： | 20引腳同步PWM控制器/ 3 LDO控制器 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 332K |
| 代理商： | IRU3072CH |
IRU3072
1
Rev. 1.0
3/25/04
www.irf.com
DESCRIPTION
The IRU3072 controller IC is designed to provide a low
cost synchronous Buck regulator for on-board DC to DC
converter for multi-output applications. The outputs can
be programmed as low as 0.8V for low voltage applica-
tions.
The IRU3072 features dual soft-starts which allows power
sequencing between outputs.
Over current limit is provided by using external MOSFET's
on-resistance for optimum cost and performance.
This device features a programmable frequency set from
200KHz to 400KHz, under-voltage lockout for all input
supplies, dual external programmable soft-start functions
as well as output under-voltage detection that latches
off the device when an output short is detected.
Synchronous Controller plus 3-LDO controllers
Current Limit using MOSFET Sensing
Dual Soft-Start Function allows power sequencing
Single 5V/12V Supply Operation
Programmable Switching Frequency up to 400KHz
Fixed Frequency Voltage Mode
1A Peak Output Drive Capability
APPLICATIONS
Graphic Card
DDR memory source sink V
TT
application
Applications with Multiple Outputs
Low cost on-board DC to DC such as
5V to 3.3V, 2.5V or 1.8V
Hard Disk Drive
PACKAGE ORDER INFORMATION
FEATURES
20-PIN SYNCHRONOUS PWM CONTROLLER/
3 LDO CONTROLLER
T
A
(°C)
0 To 70
DEVICE PACKAGE
IRU3072CH 20-Pin MLPQ 4x4 (H)
Data Sheet No. PD94698
Figure 1 - Typical application of IRU3072.
TYPICAL APPLICATION
IRU3072
U1
Vcc
Vc
HDrv
LDrv
Fb1
Gnd
Comp
SS1
V
OUT1
1.2V @ 8A
Rt
OCSet
PGnd
Drv4
Fb4
Drv3
Fb3
Drv2
Fb2
V
SEN33
/ SDB
SSLDO
3.3V
V
OUT2
2.5V
V
OUT3
1.8V
V
OUT4
1.5V
Q1
Q2
C2
10uF
Q3
C4
10uF
C9
10uF
C13
0.1uF
C14
33nF
C11
15nF
R9
C7
2x 47uF,16V
C8
10uF
C12
3x 330uF, 40m
6TPB330M, Poscap
1uH
1uH
Q4
IRF7460
Q5
IRF7460
2.15K
R2
1K
1.25KR4
1K
866
R6
1K
3.3K
46.4K
R7
VccLDO
V
IN
=12V
C5
1uF
C1
1uF
C6
0.1uF
6.81K
C10 220pF
+5V
C3
1uF
R1
R3
R5
R8
L2
L1
D1
R10
499
R11
1K
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