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LM34910C High Voltage (50V, 1.25A) Step Down Switching Regulator


source: | post time:2010-04-28

Part Number(s)
(NSID)
Top View Type Pins MSL Rating Peak Reflow RoHS
Status
CAD Symbols Models Package
Marking
Format
LM34910CSD/NOPB
LLP 10 1 260 Detail Download N/A
NS
UZXYTT
L34910C
LM34910CSDE/NOPB
LLP 10 1 260 Detail Download N/A
NS
UZXYTT
L34910C
LM34910CSDX/NOPB
LLP 10 1 260 Detail Download N/A
NS
UZXYTT
L34910C

PDFClick link to Download

Description

The LM34910C Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. This buck regulator contains a 55V N-Channel Buck Switch, and is available in the thermally enhanced LLP-10 package. The hysteretic regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The current limit detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

Features

Integrated 55V, N-Channel buck switch
Integrated start-up regulator
Input Voltage Range: 8V to 50V
No loop compensation required
Ultra-Fast transient response
Operating frequency remains constant with load current and input voltage
Maximum Duty Cycle Limited During Start-Up
Adjustable output voltage
Valley Current Limit At 1.25A
Precision internal reference
Low bias current
Highly efficient operation
Thermal shutdown

Diagrams

Typical Application
click for larger image


 

 

 

Connection Diagram
click for larger image



Prev:LM34910 High Voltage (40V, 1.25A) Step Down Switching Regulator
Next:LM34914 Ultra Small 1.25A Step-Down Switching Regulator with Intelligent Current Limit


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