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參數(shù)資料
| 型號： | IRU3138 |
| 廠商： | International Rectifier |
| 英文描述： | SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS |
| 中文描述： | 同步PWM控制器終止電源應(yīng)用 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 281K |
| 代理商： | IRU3138 |
IRU3138
1
Rev. 1.0
01/29/04
www.irf.com
DESCRIPTION
The IRU3138 controller IC is designed to provide a low
cost synchronous Buck regulator for voltage tracking
applications such DDR memory and general purpose
on-board DC to DC converter. Modern micro processors
combined with DDR memory, need high-speed bandwidth
data bus which requires a particular bus termination volt-
age. This voltage will be tightly regulated to track the
half of chipset voltage for best performance. The IRU3138
together with two N-channel MOSFETs, provide a low
cost solution for such applications. This device features
a programmable frequency set from 200KHz to 400KHz,
under-voltage lockout for both Vcc and Vc supplies, an
external programmable soft-start function as well as
output under-voltage detection that latches off the de-
vice when an output short is detected.
1A Peak Output Drive Capability
0.8V Precision Reference Voltage Available
Shuts off both drivers at shorted output
and shutdown
200KHz to 400KHz operation set by an external
resistor
Soft-Start Function
Uncommitted Error Amplifier available for DDR
voltage tracking application
Protects the output when control FET is shorted
Synchronous Controller in 14-Pin Package
PACKAGE ORDER INFORMATION
FEATURES
SYNCHRONOUS PWM CONTROLLER
FOR TERMINATION POWER SUPPLY APPLICATIONS
T
A
(°C)
0 To 70
DEVICE PACKAGE
IRU3138CS 14-Pin Plastic SOIC NB (S)
Data Sheet No. PD94701
Figure 1 - Typical application of IRU3138 when V
TT
tracks the V
DDQ
.
APPLICATIONS
DDR memory source sink Vtt application
Graphic Card
Low cost on-board DC to DC such as
5V to 3.3V, 2.5V or 1.8V
TYPICAL APPLICATION
IRU3138
U1
Vcc
Vc
HDrv
LDrv
Fb
Gnd
Comp
SS/SD
C1
0.1uF
C2
1uF
C5
0.1uF
C7
3300pF
R3
13K
Q1
IRF7460
Q2
IRF7456
L2
3.3uH
L1
1uH
C3
2x 47uF
C4
47uF
Vtt
1.25V @ 10A
C6
2x 150uF
40m
12V
PGnd
Rt
V
P
V
REF
R1
1K
R2
1K
DDR
Memory
V
DDQ
(2.5V)
5V
D1
BAT54
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IRU3138CS | 制造商:IRF 制造商全稱:International Rectifier 功能描述:SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS |
| IRU3138CSTR | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| IRU3138CSTRPBF | 功能描述:電壓模式 PWM 控制器 SYNC PWM CTRLLER 1A .8V 200 to 400kHz RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| IRU3146 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND AUTO-RESTART |
| IRU3146CF | 制造商:International Rectifier 功能描述:DC DC CNTRLR DUAL-OUT SYNC BUCK/W/PWM 4.5V TO 16V 28TSSOP - Bulk |
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