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LM5008 High Voltage (100V) 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
LM5008MM/NOPB
LM5008MM
MINI SOIC 8 1
1
260
260
Detail Download N/A
ZXTT
SAYB
LM5008MMX/NOPB
LM5008MMX
MINI SOIC 8 1
1
260
260
Detail Download N/A
ZXTT
SAYB
LM5008SDC/NOPB
LM5008SDC
LLP 8 1
1
260
260
Detail Download N/A
NS
UZXYTT
L5008SD
LM5008SDCX/NOPB
LM5008SDCX
LLP 8 1
1
260
260
Detail Download N/A
NS
UZXYTT
L5008SD

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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 VIN. 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: Thermal Shutdown, VCC under-voltage lockout, Gate drive under-voltage lockout, and Max Duty Cycle limiter

Features

Integrated 100V, N-Channel buck switch
Internal VCC 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

Diagrams

Typical Application
*click for larger image


 

 

 

Block Diagram
*click for larger image


 


Typical Performance
*click for larger image


 


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Next:LM5008A 100V, 350 mA Constant On-Time Buck Switching Regulator


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