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LM2694 Datasheet

600 mA Step Down Switching Regulator

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May 2006
LM2694
30V, 600 mA Step Down Switching Regulator
General Description
The LM2694 Step Down Switching Regulator features all of
the functions needed to implement a low cost, efficient, buck
bias regulator capable of supplying 0.6A to the load. This
buck regulator contains an N-Channel Buck Switch, and is
available in the 3 x 3 thermally enhanced LLP-10 package
and a TSSOP-14 package. The feedback regulation scheme
requires no loop compensation, results in fast load transient
response, and simplifies circuit implementation. The operat-
ing frequency remains constant with line and load variations
www.DataSdhueeetot4tUh.ecoinmverse relationship between the input voltage and
the on-time. The valley current limit results in a smooth
transition from constant voltage to constant current mode
when current limit is detected, reducing the frequency and
output voltage, without the use of foldback. Additional fea-
tures include: VCC under-voltage lockout, thermal shut-
down, gate drive under-voltage lockout, and maximum duty
cycle limiter.
n No loop compensation required
n Ultra-Fast transient response
n Operating frequency remains constant with load current
and input voltage variations
n Maximum Duty Cycle Limited During Start-Up
n Adjustable output voltage
n Valley Current Limit At 0.6A
n Maximum switching frequency: 1 MHz
n Precision internal reference
n Low bias current
n Highly efficient operation
n Thermal shutdown
Typical Applications
n High Efficiency Point-Of-Load (POL) Regulator
n Non-Isolated Telecommunication Buck Regulator
n Secondary High Voltage Post Regulator
Features
n Integrated N-Channel buck switch
n Integrated start-up regulator
n Input Voltage Range: 8V to 30V
Package
n LLP-10 (3 mm x 3 mm) w/Exposed Pad
n TSSOP-14
Basic Step Down Regulator
© 2006 National Semiconductor Corporation DS201870
20187001
www.national.com


National Semiconductor Electronic Components Datasheet

LM2694 Datasheet

600 mA Step Down Switching Regulator

No Preview Available !

Connection Diagrams
14-Lead TSSOP
www.DataSheetO4Ur.cdomering Information
20187003
Order Number
LM2694SD
LM2694SDX
LM2694MT
LM2694MTX
Package Type
LLP-10 (3x3)
LLP-10 (3x3)
TSSOP-14
TSSOP-14
NSC Package Drawing
SDA10A
SDA10A
MTC14
MTC14
10-Lead LLP
20187002
Supplied As
1000 Units on Tape and Reel
4500 Units on Tape and Reel
94 Units in Rail
2500 Units on Tape and Reel
www.national.com
2


Part Number LM2694
Description 600 mA Step Down Switching Regulator
Maker National Semiconductor
PDF Download

LM2694 Datasheet PDF






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