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LM2694 Arkusz danych(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Numer części LM2694
Szczegółowy opis  30V, 600 mA Step Down Switching Regulator
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2694 Arkusz danych(HTML) 1 Page - National Semiconductor (TI)

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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 the3x3 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
due to the inverse 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.
Features
n
Integrated N-Channel buck switch
n
Integrated start-up regulator
n
Input Voltage Range: 8V to 30V
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
Package
n
LLP-10 (3 mm x 3 mm) w/Exposed Pad
n
TSSOP-14
Basic Step Down Regulator
20187001
May 2006
© 2006 National Semiconductor Corporation
DS201870
www.national.com


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