LT3460/LT3460-1
1.3 MHz/650kHz Step-Up
DC/DC Converter in SC70,
ThinSOT and DFN
FEATURES DESCRIPTION
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1.3MHz (LT3460) Switching Frequency
The LT 3460/LT3460-1 are general purpose step-up DC/
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650kHz (LT3460-1) Switching Frequency
DC converters. The LT3460/LT3460-1 switch at 1.3MHz/
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High Output Voltage: Up to 36V
650kHz, allowing the use of tiny, low cost and low height
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300mA Integrated Switch (LT3460)
capacitors and inductors. The constant frequency results
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180mA Integrated Switch (LT3460-1)
in low, predictable output noise that is easy to lter.
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Wide Input Range: 2.5V to 16V
The high voltage switches in the LT3460/LT3460-1 are
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Uses Small Surface Mount Components
rated at 38V, making the device ideal for boost converters
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Low Shutdown Current: <1A
up to 36V. The LT3460 can generate 12V at up to 70mA
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Low Pro le (1mm) SC70 (LT3460 and LT3460-1),
from a 5V supply.
SOT-23 (ThinSOT) (LT3460) and 2mm 2mm DFN
The low 1mA quiescent current and 650kHz switching
(LT3460-1) Packages
frequency of LT3460-1 make it ideal for lower current
APPLICATIONS
applications.
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Digital Cameras
The LT3460 is available in SC70 and SOT-23 packages.
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CCD Bias Supply
The LT3460-1 is available in SC70 and 2mm 2mm DFN
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XDSL Power Supply
packages.
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TFT-LCD Bias Supply
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
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Local 5V or 12V Supply
respective owners.
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Medical Diagnostic Equipment
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Battery Backup
Ef ciency
TYPICAL APPLICATION
90
85
80
5V to 12V, 70mA Step-Up DC/DC Converter
75
22H
V
OUT
V
IN
12V
70
5V
70mA
130k 22pF
V
4.7F SW
IN
65
LT3460
OFF ON SHDN FB
60
1F
0 20 40 60 80
15k LOAD CURRENT (mA)
GND
3460 F01a
Switching Waveforms
3460 F01
V
SW
5V/DIV
I
L
100mA/DIV
3460 F01b
0.2s/DIV
3460fb
1
EFFICIENCY (%)LT3460/LT3460-1
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage (V ) .................................................... 16V Operating Ambient
IN
SW Voltage ...............................................................38V Temperature Range (Note 2) ....................40C to 85C
FB Voltage ...................................................................5V Maximum Junction Temperature........................... 125C
SHDN Voltage ...........................................................16V Storage Temperature Range ................... 65C to 150C
Lead Temperature (Soldering, 10 sec) .................. 300C
PIN CONFIGURATION
TOP VIEW TOP VIEW
SW 1 5 V
SW 1 6 V
IN IN
GND 2 GND 2 5 GND
FB 3 4SHDN FB 3
4SHDN
S5 PACKAGE SC6 PACKAGE
5-LEAD PLASTIC TSOT-23 6-LEAD PLASTIC SC70
T = 125C, = 256C/W IN FREE AIR T = 125C, = 400C/W IN FREE AIR
JMAX JA
JMAX JA
= 120C ON BOARD OVER GROUND PLANE = 270C/W ON BOARD OVER GROUND PLANE
JA
JA
TOP VIEW
FB 1 6 SHDN
NC 2 7 5 NC
SW 4 V
3
IN
DC PACKAGE
6-LEAD (2mm 2mm) PLASTIC DFN
T = 125C, = 102C/W
JMAX JA
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3460ES5#PBF LT3460ES5#TRPBF LTB1 5-Lead Plastic TSOT-23 40C to 85C
LT3460ESC6#PBF LT3460ESC6#TRPBF LAAF 6-Lead Plastic SC70 40C to 85C
LT3460ESC6-1#PBF LT3460ESC6-1#TRPBF LDJV 6-Lead Plastic SC70 40C to 85C
LT3460EDC-1#PBF LT3460EDC-1#TRPBF LDNB 6-Lead (2mm 2mm) Plastic DFN 40C to 85C
Consult LTC Marketing for parts speci ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based nish parts.
For more information on lead free part marking, go to: