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參數資料
| 型號： | ADP3171 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Charger front end protection IC with 30V max Vin and 4.5V LDO output 8-WSON 0 to 125 |
| 中文描述： | 同步降壓控制器，配有雙線性穩壓器控制器 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 310K |
| 代理商： | ADP3171 |
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Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
Analog Devices, Inc., 2002ADP3171
Synchronous Buck Controller
with Dual Linear Regulator Controllers
FUNCTIONAL BLOCK DIAGRAM
OSCILLATOR
PWM
LOGIC
SET
RESET
CROWBAR
1.8V
LRFB2
LRDRV2
REFERENCE
REF
1
GND
DAC +20%
DAC –20%
CMP
g
m
UVLO
AND BIAS
DRVH
VCC
COMP
DRVL
PWRGD
CS–
CS+
FB
CT
8
ADP3171
5
7
1.5V
LRFB1
LRDRV1
3
4
1.2V
FEATURES
Fixed 1.2 V N-Channel Synchronous Buck Driver
Two On-Board Linear Regulator Controllers
Total Accuracy
±
1% over Temperature
High Efficiency Current-Mode Operation
Short Circuit Protection
Power Good Output
Overvoltage Protection Crowbar Protects Switching
Output with No Additional External Components
APPLICATIONS
Auxiliary System Supplies for Desktop
Computer Systems
General-Purpose Low Voltage Supplies
GENERAL DESCRIPTION
The ADP3171 is a highly efficient output synchronous buck
switching regulator controller optimized for converting a 5 V
main supply into the auxiliary supply voltages required by
processors and chipsets. The ADP3171 provides a fixed
output voltage of 1.2 V at up to 15 A, depending on the
power ratings of the external MOSFETs and inductor. The
ADP3171 uses a current-mode, constant off time architecture to
drive two N-channel MOSFETs at a programmable switching
frequency that can be optimized for regulator size and efficiency.
The ADP3171 provides accurate and reliable short circuit
protection and adjustable current limiting. It also includes an
integrated overvoltage crowbar function to protect the load in
case the output voltage exceeds the nominal programmed
voltage
by more than 20%.
The ADP3171 contains two fixed output voltage linear regulator
controllers that are designed to drive external N-channel
MOSFETs. These linear regulators are used to generate the
auxiliary voltages required in most motherboard designs and have
been designed to provide a high bandwidth load-transient response.
The ADP3171 is specified over the commercial temperature
range of 0
°
C to 70
°
C and is available in a 14-lead SOIC package.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADP3171JR | 制造商:Rochester Electronics LLC 功能描述:1.2V VTT BUCK CNTRLR W/2 LDOS & PWR GOOD - Bulk |
| ADP3171JR-REEL7 | 制造商:Rochester Electronics LLC 功能描述:1.2V VTT BUCK CNTRLR W/2 LDOS & PWR GOOD - Tape and Reel |
| ADP3178 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Bit Programmable Synchronous Buck Controllers |
| ADP3178JR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADP3178JRZ-REEL7 | 功能描述:IC REG BUCK 4BIT ADJ VLT 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數:2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
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