音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM2637M Datasheet

  • LM2637M

  • Motherboard Power Supply Solution with a 5-Bit Programmable ...

  • 18頁

  • NSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

LM2637 Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and
Two Linear Regulator Controllers
October 1998
LM2637
Motherboard Power Supply Solution with a 5-Bit
Programmable Switching Controller and Two Linear
Regulator Controllers
General Description
The LM2637 provides a comprehensive embedded power
supply solution for motherboards hosting high performance
MPUs such as M II
鈩?/div>
, Pentium
鈩?/div>
II, K6-2 and other similar
high performance MPUs. The LM2637 incorporates a 5-bit
programmable, synchronous buck switching controller and
two high-speed linear regulator controllers in a 24-pin SO
package.
Both linear controllers have under voltage latch-off.
Features
n
Provides 3 regulated voltages
n
Power Good flag and output enable
n
Under-voltage latch-off
Switching Section
n
Synchronous rectification
n
5-bit DAC programmable from 3.5V to 1.3V
n
Typical 1% DAC tolerance
n
Switching frequency: 50 kHz to 1 MHz
n
Two levels of over-voltage protection
n
Two methods of over-current protection
n
Adaptive non-overlapping FET gate drives
n
Soft start without external capacitor
Linear Section
n
N-FET and NPN driving capability
n
Ultra fast response speed
n
Output voltages default to 1.5V and 2.5V yet adjustable
Switching Section
鈥?The switching regulator controller fea-
tures a 5-bit programmable DAC, over-current and
over-voltage protection, under-voltage latch-off, a power
good signal, and output enable. The 5-bit DAC has a typical
tolerance of 1%. There are two user-selectable over-current
protection methods. One provides accurate over-current pro-
tection with the use of an external sense resistor. The other
saves cost by taking advantage of the r
DS_ON
of the
high-side FET. The over voltage protection provides two lev-
els of protection. The first level keeps the high-side FET off
and the low-side FET on. The second provides a gate signal
that can be used to fire an external SCR.
Linear Section
鈥?The two linear regulator controllers fea-
ture wide control bandwidth, N-FET and NPN transistor driv-
ing capability, and an adjustable output voltage. The wide
control bandwidth makes meeting fast load transient re-
sponse requirement such as that of the GTL+ bus an easy
job. In minimum configuration, the two controllers default to
1.5V and 2.5V respectively.
Applications
n
Embedded power supplies for PC motherboards
n
Triple DC/DC power supplies
n
Programmable high current DC/DC power supply
Pin Configuration
24-Lead SOIC
DS100848-1
Top View
NS Package Number M24B
M II
鈩?/div>
is a trademark of Cyrix Corporation a wholly owned subsidiary of National Semiconductor Corporation.
Pentium
鈩?/div>
is a trademark of Intel Corporation.
K6 is trademark of Advanced Micro Devices, Inc.
漏 1999 National Semiconductor Corporation
DS100848
www.national.com

LM2637M相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Adapter Interface Circuit
    NSC
  • 英文版
    SOT-23 ±3°C Accurate Factory Preset Thermostat
    NATIONAL
  • 英文版
    INFRARED LAMP LED
    SEOUL
  • 英文版
    High Speed Differential Comparators
  • 英文版
    Adapter Interface Circuit
    NSC
  • 英文版
    Adapter Interface Circuit
    NSC [Natio...
  • 英文版
    400mA Sub-miniature, High Efficiency, Programmable DC-DC Con...
    NSC
  • 英文版
    400mA Sub-miniature, High Efficiency, Programmable DC-DC Con...
    NSC [Natio...
  • 英文版
    1.4MHz Cuk Converter
    NSC
  • 英文版
    1.4MHz Cuk Converter
    NSC [Natio...
  • 英文版
    400mA Sub-miniature, Programmable, Step-Down DC-DC Converter...
    NSC
  • 英文版
    400mA Sub-miniature, Programmable, Step-Down DC-DC Converter...
    NSC [Natio...
  • 英文版
    400mA Sub-Miniature Adjustable DC-DC Converter Optimized for...
    NSC
  • 英文版
    400mA Sub-Miniature Adjustable DC-DC Converter Optimized for...
    NSC [Natio...
  • 英文版
    400mA Sub-miniature, High Efficiency, Synchronous PWM & PFM ...
    NSC
  • 英文版
    400mA Sub-miniature, High Efficiency, Synchronous PWM & PFM ...
    NSC [Natio...
  • 英文版
    500mA Sub-Miniature Step-Down DC-DC Converter
    NSC
  • 英文版
    500mA Sub-Miniature Step-Down DC-DC Converter
    NSC [Natio...
  • 英文版
    Low Input Voltage, Step-Up DC-DC Converter
    NSC
  • 英文版
    Low Input Voltage, Step-Up DC-DC Converter
    NSC [Natio...

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！