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參數資料
| 型號： | ISL6431A |
| 廠商： | Intersil Corporation |
| 英文描述： | Advanced Pulse Width Modulation (PWM) Controller for Broadband Applications |
| 中文描述： | 先進的脈沖寬度調制（PWM）控制器的寬帶應用 |
| 文件頁數： | 1/10頁 |
| 文件大?。?/td> | 215K |
| 代理商： | ISL6431A |
1
FN9088
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL6431A
Advanced Pulse Width Modulation (PWM)
Controller for Broadband Applications
The ISL6431A is a high efficiency, fixed frequency,
synchronous buck PWM controller. It is designed for use in
applications that convert 5V to lower distributed voltages
required for DSL modems, cable and DSL routers and
broadband gateway core processor, memory and peripheral
power supplies.
The ISL6431A makes simple work out of implementing a
complete control and protection scheme for a DC-DC
stepdown converter. Designed to drive N-channel MOSFETs
in a synchronous buck topology, the ISL6431A integrates
the control, output adjustment, monitoring and protection
functions into a single 8-Lead package.
The ISL6431A provides simple, single feedback loop,
voltage-mode control with fast transient response. The
output voltage can be precisely regulated to as low as 0.8V,
with a maximum tolerance of
±
1.5% over temperature and
line voltage variations. The device is capable of sinking, as
well as sourcing current. A fixed frequency oscillator reduces
design complexity, while balancing typical application cost
and efficiency.
The error amplifier features a 15MHz gain-bandwidth
product and 8V/
μ
s slew rate which enables high converter
bandwidth for fast transient performance. The resulting
PWM duty cycles range from 0% to 100%.
Protection from overcurrent conditions is provided by
monitoring the r
DS(ON)
of the upper MOSFET to inhibit PWM
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
Features
Operates from +5V Input
0.8V to V
IN
Output Range
- 0.8V Internal Reference
- ±1.5% Over Line Voltage and Temperature
Drives N-Channel MOSFETs
Simple Single-Loop Control Design
- Voltage-Mode PWM Control
Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET’s r
DS(on)
Converter Can Source and Sink Current
Small Converter Size
- 300kHz Fixed Frequency Oscillator
- Internal Soft Start
- 8-Lead SOIC Package
Applications
Cable/DSL Routers and DSL Modems
DSP and Core Communications Processor Supplies
Broadband Gateways
Memory Supplies
Industrial Power Supplies
5V-Input DC-DC Regulators
Low-Voltage Distributed Power Supplies
Pinout
Ordering Information
PART NUMBER
TEMP. RANGE
(
o
C)
PACKAGE
PKG.
NO.
ISL6431ACB
0 to 70
8 Ld SOIC
M8.15
ISL6431EVAL1
Evaluation Board
5
6
8
7
4
3
2
1
UGATE
GND
PHASE
FB
VCC
COMP/OCSET
BOOT
LGATE
Data Sheet
October 2002
相關PDF資料 |
PDF描述 |
|---|---|
| ISL6431ACB | Advanced Pulse Width Modulation (PWM) Controller for Broadband Applications |
| ISL6520A | Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125 |
| ISL6525CBZ | Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller |
| ISL6525 | Adjustable Precision Shunt Regulator 5-SOT-23 -40 to 125 |
| ISL6525CB | Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL6431ACB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ISL6431CB | 功能描述:電壓模式 PWM 控制器 For Home Gateways RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
| ISL6431CB-T | 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數: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) |
| ISL6431IB | 制造商:Intersil Corporation 功能描述: |
| ISL6432CB | 制造商:Intersil Corporation 功能描述: |
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