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參數資料
| 型號： | LM3103MHX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SIMPLE SWITCHER㈢ Synchronous 1MHz 0.75A Step-Down Voltage Regulator |
| 中文描述： | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 304K |
| 代理商： | LM3103MHX |
October 2007
LM3103
SIMPLE SWITCHER Synchronous 1MHz 0.75A
Step-Down Voltage Regulator
General Description
The LM3103 Synchronously Rectified Buck Converter fea-
tures all required functions to implement a highly efficient and
cost effective buck regulator. It is capable of supplying 0.75A
to loads with an output voltage as low as 0.6V. Dual N-Chan-
nel synchronous MOSFET switches allow a low component
count, thus reducing complexity and minimizing board size.
Different from most other COT regulators, the LM3103 does
not rely on output capacitor ESR for stability, and is designed
to work exceptionally well with ceramic and other very low
ESR output capacitors. It requires no loop compensation, re-
sults in a fast load transient response and simple circuit
implementation. The operating frequency remains nearly con-
stant with line variations due to the inverse relationship be-
tween the input voltage and the on-time. The operating
frequency can be externally programmed up to 1 MHz. Pro-
tection features include V
under-voltage lock-out, output
over-voltage protection, thermal shutdown, and gate drive
under-voltage lock-out. The LM3103 is available in the ther-
mally enhanced eTSSOP-16 package.
Key Specifications
■
Input voltage range 4.5V-42V
■
0.75A output current
■
0.6V, ±2% reference
■
Integrated dual N-Channel main and synchronous
MOSFETs
■
Thermally enhanced eTSSOP-16 package
Features
■
Low component count and small solution size
■
Stable with ceramic and other low ESR capacitors
■
No loop compensation required
■
High efficiency at a light load by DCM operation
■
Pre-bias startup
■
Ultra-fast transient response
■
Programmable soft-start
■
Programmable switching frequency up to 1 MHz
■
Valley current limit
■
Thermal shutdown
■
Output over-voltage protection
■
Precision internal reference for an adjustable output
voltage down to 0.6V
Typical Applications
■
5VDC, 12VDC, 24VDC, 12VAC, and 24VAC systems
■
Embedded Systems
■
Industrial Control
■
Automotive Telematics and Body Electronics
■
Point of Load Regulators
■
Storage Systems
■
Broadband Infrastructure
■
Direct Conversion from 2/3/4 Cell Lithium Batteries
Systems
Typical Application
30029701
SIMPLE SWITCHER is a registered trademark of National Semiconductor Corporation
2007 National Semiconductor Corporation
300297
www.national.com
L
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3103MHX/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM310H | 制造商:National Semiconductor 功能描述:310 NSC'83 SB51C 制造商:Texas Instruments 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| LM310H/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Buffer/Voltage Follower |
| LM310J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Voltage Follower |
| LM310J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Buffer/Voltage Follower |
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