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參數(shù)資料
| 型號(hào)： | LM3485MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Hysteretic PFET Buck Controller |
| 中文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 369K |
| 代理商： | LM3485MM |
LM3485
Hysteretic PFET Buck Controller
General Description
The LM3485 is a high efficiency PFET switching regulator
controller that a system designer can use to quickly and
easily develop a small, low cost, switching buck regulator for
a wide range of applications. The use of a hysteretic control
scheme provides for simple design without any control loop
stability concerns using a wide variety of external compo-
nents. The PFET architecture also allows for low component
count as well as ultra-low dropout operation. Another benefit
is high efficiency operation at light loads without an increase
in output ripple. Current limit protection circuit is provided by
measuring the voltage across the PFET’s R
thus elimi-
nating a costly sense resistor. The current limit can be ad-
justed allowing for designs at various output currents and
costs.
Features
n
Easy to use control methodology
n
No control loop compensation required
n
4.5V to 35V wide input range
n
1.242V to V
IN
adjustable output range
n
High Efficiency 93%
n
±
1.3% (
±
2% over temp) internal reference
n
100% duty cycle
n
Maximum operating frequency
>
1MHz
n
Current limit protection
n
MSOP-8
Applications
n
Set-Top Box
n
DSL/Cable Modem
n
PC/IA
n
Auto PC
n
TFT Monitor
n
Battery Powered Portable Applications
n
Distributed Power Systems
n
Always On Power
Typical Application Circuit
20034608
May 2002
L
2002 National Semiconductor Corporation
DS200346
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3485MMX | Hysteretic PFET Buck Controller |
| LM3488 | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| LM3488MM | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| LM3488MMX | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| LM34A | Precision Fahrenheit Temperature Sensors |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3485MM/E7002094 | 制造商:Texas Instruments 功能描述: |
| LM3485MM/NOPB | 功能描述:DC/DC 開關(guān)控制器 HYSTERETIC PFET BUCK CONTROLLER RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3485MM/NOPB | 制造商:Texas Instruments 功能描述:Pulse Width Modulation (PWM) Controller |
| LM3485MM-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Hysteretic PFET Buck Controller |
| LM3485MMX | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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