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IRU3037A PDF预览

IRU3037A

更新时间: 2024-11-27 22:48:03
品牌 Logo 应用领域
英飞凌 - INFINEON 控制器
页数 文件大小 规格书
21页 221K
描述
8-PIN SYNCHRONOUS PWM CONTROLLER

IRU3037A 数据手册

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Data Sheet No. PD94173  
IRU3037 / IRU3037A  
8-PIN SYNCHRONOUS PWM CONTROLLER  
FEATURES  
DESCRIPTION  
Synchronous Controller in 8-Pin Package  
Operating with single 5V or 12V supply voltage  
Internal 200KHz Oscillator  
The IRU3037 controller IC is designed to provide a low  
cost synchronous Buck regulator for on-board DC to DC  
converter applications. With the migration of today’s ASIC  
products requiring low supply voltages such as 1.8V and  
lower, together with currents in excess of 3A, traditional  
linear regulators are simply too lossy to be used when  
input supply is 5V or even in some cases with 3.3V  
input supply. The IRU3037 together with dual N-channel  
MOSFETs such as IRF7313, provide a low cost solution  
for such applications. This device features an internal  
200KHz oscillator (400KHz for "A" version), under-volt-  
age lockout for both Vcc and Vc supplies, an external  
programmable soft-start function as well as output un-  
der-voltage detection that latches off the device when an  
output short is detected.  
(400KHz for IRU3037A)  
Soft-Start Function  
Fixed Frequency Voltage Mode  
500mA Peak Output Drive Capability  
Protects the output when control FET is shorted  
APPLICATIONS  
DDR memory source sink Vtt application  
Low cost on-board DC to DC such as 5V to 3.3V,  
2.5V or 1.8V  
Graphic Card  
Hard Disk Drive  
TYPICAL APPLICATION  
5V  
12V  
L1  
1uH  
C3  
1uF  
C4  
1uF  
C2  
C1  
47uF  
10TPB100M,  
100uF, 55m  
Vcc  
Vc  
Q1  
1/2 of IRF7313  
HDrv  
LDrv  
Fb  
L2  
D05022P-562, 5.6uH, 5.3A  
SS/SD  
1.5V/5A  
U1  
C8  
0.1uF  
IRU3037  
Q2  
C7  
1/2 of IRF7313  
2x 6TPC150M,  
150uF, 40m  
R3  
Comp  
C9  
249, 1%  
2200pF  
Gnd  
R5  
1.24K, 1%  
R4  
24k  
Figure 1 - Typical application of IRU3037 or IRU3037A.  
PACKAGE ORDER INFORMATION  
TA (°C)  
0 To 70  
0 To 70  
0 To 70  
0 To 70  
DEVICE  
PACKAGE  
FREQUENCY  
200KHz  
200KHz  
400KHz  
400KHz  
IRU3037CF  
IRU3037CS  
IRU3037ACF  
IRU3037ACS  
8-Pin Plastic TSSOP (F)  
8-Pin Plastic SOIC NB (S)  
8-Pin Plastic TSSOP (F)  
8-Pin Plastic SOIC NB (S)  
Rev. 2.8  
03/10/03  
www.irf.com  
1

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