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IRU3072C PDF预览

IRU3072C

更新时间: 2024-11-27 22:35:59
品牌 Logo 应用领域
英飞凌 - INFINEON 控制器
页数 文件大小 规格书
24页 329K
描述
20-PIN SYNCHRONOUS PWM CONTROLLER/ 3 LDO CONTROLLER

IRU3072C 数据手册

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Data Sheet No. PD94698  
IRU3072  
20-PIN SYNCHRONOUS PWM CONTROLLER/  
3 LDO CONTROLLER  
FEATURES  
DESCRIPTION  
Synchronous Controller plus 3-LDO controllers  
Current Limit using MOSFET Sensing  
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-  
Dual Soft-Start Function allows power sequencing  
Single 5V/12V Supply Operation  
Programmable Switching Frequency up to 400KHz tions.  
Fixed Frequency Voltage Mode  
1A Peak Output Drive Capability  
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.  
APPLICATIONS  
Graphic Card  
DDR memory source sink VTT 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  
TYPICAL APPLICATION  
3.3V  
Vcc  
V
SEN33 / SDB  
+5V  
C1  
1uF  
Q1  
Drv2  
Fb2  
R1  
V
OUT2  
2.5V  
2.15K  
C2  
R2  
1K  
10uF  
Q2  
VccLDO  
Vc  
C3  
1uF  
Drv3  
Fb3  
D1  
R3  
VOUT3  
1.8V  
L1  
1.25K  
C4  
10uF  
R4  
1K  
VIN=12V  
1uH  
C7  
2x 47uF,16V  
U1  
IRU3072  
C6  
0.1uF  
C5  
1uF  
C8  
10uF  
Q3  
Drv4  
Fb4  
R5  
V
OUT4  
1.5V  
Q4  
IRF7460  
866Ω  
HDrv  
C9  
10uF  
R6  
1K  
L2  
1uH  
R7  
OCSet  
LDrv  
V
OUT1  
1.2V @ 8A  
C10 220pF  
6.81K  
Q5  
IRF7460  
R8  
C12  
3x 330uF, 40m  
6TPB330M, Poscap  
C11  
15nF  
Comp  
3.3K  
R9  
46.4K  
R10  
499Ω  
Rt  
SS1  
Fb1  
C13  
0.1uF C14  
33nF  
R11  
1K  
SSLDO  
Gnd  
PGnd  
Figure 1 - Typical application of IRU3072.  
PACKAGE ORDER INFORMATION  
TA (°C)  
DEVICE  
PACKAGE  
0 To 70  
IRU3072CH  
20-Pin MLPQ 4x4 (H)  
Rev. 1.0  
3/25/04  
www.irf.com  
1

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