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LT1912EMSE-TRPBF Datasheet(PDF) 1 Page - Linear Technology

Part # LT1912EMSE-TRPBF
Description  36V, 2A, 500kHz Step-Down Switching Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1912EMSE-TRPBF Datasheet(HTML) 1 Page - Linear Technology

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LT1912
1
1912f
TYPICAL APPLICATION
APPLICATIONS
36V, 2A, 500kHz Step-Down
Switching Regulator
The LT®1912 is an adjustable frequency (200kHz to
500kHz) monolithic step-down switching regulator that
accepts input voltages up to 36V. A high efficiency 0.25Ω
switch is included on the die along with a boost Schottky
diode and the necessary oscillator, control, and logic cir-
cuitry. Current mode topology is used for fast transient
response and good loop stability. The LT1912 allows the
use of ceramic capacitors resulting in low output ripple
while keeping total solution size to a minimum. The low
current shutdown mode reduces input supply current
to less than 1μA while a resistor and capacitor on the
RUN/SS pin provide a controlled output voltage ramp
(soft-start). The LT1912 is available in 10-Pin MSOP and
3mm × 3mm DFN packages with exposed pads for low
thermal resistance.
Automotive Battery Regulation
Set Top Box
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
3.3V Step-Down Converter
SW
FB
VC
RT
VIN
BD
VIN
4.5V TO 36V
VOUT
3.3V
2A
4.7μF
0.47μF
470pF
47μF
100k
20k
68.1k
6.8μH
316k
GND
OFF ON
LT1912
1912 TA01
RUN/SS
BOOST
SYNC
Efficiency
LOAD CURRENT (A)
0
50
0.5
1.0
1.5
2
1912 TA01b
60
100
90
80
70
VIN = 12V
L = 6.8μF
F = 500kHz
VOUT = 3.3V
VOUT = 5V
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Wide Input Range:
Operation From 3.6V to 36V
2A Maximum Output Current
Adjustable Switching Frequency: 200kHz to 500kHz
Low Shutdown Current: IQ < 1μA
Integrated Boost Diode
Synchronizable Between 250kHz to 500kHz
Saturating Switch Design: 0.25Ω On-Resistance
0.790V Feedback Reference Voltage
Output Voltage: 0.79V to 20V
Soft-Start Capability
Small 10-Pin Thermally Enhanced MSOP and
(3mm × 3mm) DFN Packages
FEATURES
DESCRIPTION


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