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參數資料
| 型號： | LM25085MMY |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 465K |
| 代理商： | LM25085MMY |
LM25085
February 6, 2009
42V Constant On-Time PFET Buck Switching Controller
General Description
The LM25085 is a high efficiency PFET switching regulator
controller that can be used to quickly and easily develop a
small, efficient buck regulator for a wide range of applications.
This high voltage controller contains a PFET gate driver and
a high voltage bias regulator which operates over a wide 4.5V
to 42V input range. The constant on-time regulation principle
requires no loop compensation, simplifies circuit implemen-
tation, and results in ultra-fast load transient response. The
operating frequency remains nearly constant with line and
load variations due to the inverse relationship between the
input voltage and the on-time. The PFET architecture allows
100% duty cycle operation for a low dropout voltage. Either
the R
DS(ON) of the PFET or an external sense resistor can be
used to sense current for over-current detection.
Features
■ Wide 4.5V to 42V input voltage range
■ Adjustable current limit using R
DS(ON) or a current sense
resistor
■ Programmable switching frequency to 1MHz
■ No loop compensation required
■ Ultra-Fast transient response
■ Nearly constant operating frequency with line and load
variations
■ Adjustable output voltage from 1.25V
■ Precision ±2% feedback reference
■ Capable of 100% duty cycle operation
■ Internal soft-start timer
■ Integrated high voltage bias regulator
■ Thermal shutdown
Package
■ MSOP-8EP
■ MSOP-8
■ LLP-8 (3 mm x 3 mm)
Typical Application, Basic Step Down Controller
30079301
2009 National Semiconductor Corporation
300793
www.national.com
LM25085
42V
Constant
On-Time
PFET
Buck
Switching
Controller
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM25085MY | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:42V Constant On-Time PFET Buck Switching Controller |
| LM25085MY/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM25085MYE | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT Buck 4.5V to 42V Input 8-Pin MSOP EP T/R 制造商:Texas Instruments 功能描述:IC, SW BUCK CONTROLLER, 42V, 8MSOIC 制造商:Texas Instruments 功能描述:IC, SW BUCK CONTROLLER, 42V, 8MSOIC; Primary Input Voltage:42V; No. of Outputs:1; Output Voltage:42V; Output Current:10A; Voltage Regulator Case Style:MSOP; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes |
| LM25085MYE/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM25085MYEVAL | 功能描述:BOARD EVAL FOR LM25085 MSOP RoHS:是 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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