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LM5008SD Datasheet

  • LM5008SD

  • High Voltage (100V) Step Down Switching Regulator

  • 15頁(yè)

  • NSC

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LM5008 High Voltage (100V) Step Down Switching Regulator
October 2004
LM5008
High Voltage (100V) Step Down Switching Regulator
General Description
The LM5008 Step Down Switching Regulator features all of
the functions needed to implement a low cost, efficient, Buck
bias regulator. This high voltage regulator contains an 100 V
N-Channel Buck Switch. The device is easy to implement
and is provided in the MSOP-8 and the thermally enhanced
LLP-8 packages. The regulator is based on a hysteretic
control scheme using an ON time inversely proportional to
V
IN
. This feature allows the operating frequency to remain
relatively constant. The hysteretic control requires no loop
compensation. An intelligent current limit is implemented
with forced OFF time, which is inversely proportional to Vout.
This scheme ensures short circuit protection while providing
minimum foldback. Other protection features include: Ther-
mal Shutdown, V
CC
under-voltage lockout, Gate drive under-
voltage lockout, and Max Duty Cycle limiter
Features
n
n
n
n
n
n
n
n
n
n
n
n
Integrated 100V, N-Channel buck switch
Internal V
CC
regulator
No loop compensation required
Ultra-Fast transient response
On time varies inversely with line voltage
Operating frequency remains constant with varying line
voltage and load current
Adjustable output voltage
Highly efficient operation
Precision internal reference
Low bias current
Intelligent current limit protection
Thermal shutdown
Typical Applications
n
Non-Isolated Telecommunication Buck Regulator
n
Secondary High Voltage Post Regulator
n
+42V Automotive Systems
Package
n
MSOP - 8
n
LLP - 8 (4mm x 4mm)
Connection Diagram
20097902
8-Lead MSOP, LLP
Ordering Information
Order Number
LM5008MM
LM5008SD
Package Type
MSOP-8
LLP-8
NSC Package Drawing
MUA08A
SDC08A
Supplied As
1000 Units on Tape and Reel
1000 Units on Tape and Reel
漏 2004 National Semiconductor Corporation
DS200979
www.national.com

LM5008SD 產(chǎn)品屬性

  • 1,000

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 降壓（降壓）

  • 可調(diào)式

  • 2

  • 2.5 V ~ 75 V

  • 9.5 V ~ 95 V

  • -

  • 600kHz

  • 350mA

  • 無

  • -40°C ~ 125°C

  • 表面貼裝

  • 8-WDFN 裸露焊盤

  • 帶卷 (TR)

  • 8-LLP-EP（4x4）

  • LM5008EVAL-ND - EVALUATION BOARD FOR LM5008

  • LM5008SD/NOPBLM5008SDTR

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