LT3460_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 Profile (1mm) SC70 (LT3460 and LT3460-1),}
SOT-23 (ThinSOT™) (LT3460) and 2mm × 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 filter.
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 × 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
V_IN
5V
4.7μF
OFF ON
V_IN
SW
LT3460
SHDN
FB
GND
130k
22pF
V_OUT
12V
70mA
1μF
15k
3460 F01
Efficiency
90
85
80
75
70
65
60
0
20
40
60
LOAD CURRENT (mA)
80
3460 F01a
Switching Waveforms
V_SW
5V/DIV
I_L
100mA/DIV
0.2μs/DIV
3460 F01b
3460fb
1