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LM5007 High Voltage (80V) Step Down Switching Regulator


source: | post time:2010-04-30

Part Number(s)
(NSID)
Top View Type Pins MSL Rating Peak Reflow RoHS
Status
CAD Symbols Models Package
Marking
Format
LM5007MM/NOPB
LM5007MM
MINI SOIC 8 1
1
260
260
Detail Download N/A
ZXTT
S81B
LM5007MMX/NOPB
LM5007MMX
MINI SOIC 8 1
1
260
260
Detail Download N/A
ZXTT
S81B
LM5007SD/NOPB
LM5007SD
LLP 8 1
1
260
260
Detail Download N/A
NS
UZXYTT
L00031B
LM5007SDX/NOPB
LLP 8 1 260 Detail Download N/A
NS
UZXYTT
L00031B

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Description

The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80 V, 0.7A N-Channel Buck Switch. The device is easy to apply 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 VIN. This feature allows the operating frequency to remain relatively constant with load and input voltage variations. The hysteretic control requires no control loop compensation, while providing very fast load transient response. An intelligent current limit is implemented in the LM5007 with forced off time that is inversely proportional to VOUT. This current limiting scheme reduces load current foldback. Additional protection features include: Thermal Shutdown, Vcc undervoltage lockout, gate drive undervoltage lockout, and Max Duty Cycle limiter.

Features

Integrated 80V, 0.7A N-Channel Buck Switch
Internal HV Vcc Regulator
No Control Loop Compensation Required
Ultra-Fast Transient Response
On Time Varies Inversely with Line Voltage
Operating Frequency Nearly Constant with Varying Line Voltage
Adjustable Output Voltage
Highly Efficient Operation
Precision Reference
Low Bias Current
Intelligent Current Limit Protection
Thermal Shutdown
External Shutdown Control

Diagrams

 

 

 

Block Diagram
*click for larger image


 


Typical Performance
*click for larger image


 


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Next:LM5008 High Voltage (100V) Step Down Switching Regulator


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