|
LT3460-1_15 Datasheet, PDF (1/12 Pages) Linear Technology – 1.3 MHz/650kHz Step-Up DC/DC Converter in SC70, ThinSOT and DFN | |||
|
FEATURES
n 1.3MHz (LT3460) Switching Frequency
n 650kHz (LT3460-1) Switching Frequency
n High Output Voltage: Up to 36V
n 300mA Integrated Switch (LT3460)
n 180mA Integrated Switch (LT3460-1)
n Wide Input Range: 2.5V to 16V
n Uses Small Surface Mount Components
n Low Shutdown Current: <1μA
n Low Proï¬le (1mm) SC70 (LT3460 and LT3460-1),
SOT-23 (ThinSOTâ¢) (LT3460) and 2mm à 2mm DFN
(LT3460-1) Packages
APPLICATIONS
n Digital Cameras
n CCD Bias Supply
n XDSL Power Supply
n TFT-LCD Bias Supply
n Local 5V or 12V Supply
n Medical Diagnostic Equipment
n Battery Backup
LT3460/LT3460-1
1.3 MHz/650kHz Step-Up
DC/DC Converter in SC70,
ThinSOT and DFN
DESCRIPTION
The LT®3460/LT3460-1 are general purpose step-up DC/
DC converters. The LT3460/LT3460-1 switch at 1.3MHz/
650kHz, allowing the use of tiny, low cost and low height
capacitors and inductors. The constant frequency results
in low, predictable output noise that is easy to ï¬lter.
The high voltage switches in the LT3460/LT3460-1 are
rated at 38V, making the device ideal for boost converters
up to 36V. The LT3460 can generate 12V at up to 70mA
from a 5V supply.
The low 1mA quiescent current and 650kHz switching
frequency of LT3460-1 make it ideal for lower current
applications.
The LT3460 is available in SC70 and SOT-23 packages.
The LT3460-1 is available in SC70 and 2mm à 2mm DFN
packages.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is
a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
TYPICAL APPLICATION
5V to 12V, 70mA Step-Up DC/DC Converter
22μH
VIN
5V
4.7μF
OFF ON
VIN
SW
LT3460
SHDN
FB
GND
130k
22pF
VOUT
12V
70mA
1μF
15k
3460 F01
Efï¬ciency
90
85
80
75
70
65
60
0
20
40
60
LOAD CURRENT (mA)
80
3460 F01a
Switching Waveforms
VSW
5V/DIV
IL
100mA/DIV
0.2μs/DIV
3460 F01b
3460fb
1
|
▷ |