lt3460esc6-trpbf Linear Technology Corporation, lt3460esc6-trpbf Datasheet

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lt3460esc6-trpbf

Manufacturer Part Number
lt3460esc6-trpbf
Description
1.3 Mhz/650khz Step-up Dc/dc Converter In Sc70 And Thinsot
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIONS
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TYPICAL APPLICATION
1.3MHz (LT3460) Switching Frequency
650kHz (LT3460-1) Switching Frequency
High Output Voltage: Up to 36V
300mA Integrated Switch (LT3460)
180mA Integrated Switch (LT3460-1)
Wide Input Range: 2.5V to 16V
Uses Small Surface Mount Components
Low Shutdown Current: <1μA
Low Profi le (1mm) SC70 (LT3460 and LT3460-1),
SOT-23 (ThinSOT™) (LT3460) and 2mm × 2mm DFN
(LT3460-1) Packages
Digital Cameras
CCD Bias Supply
XDSL Power Supply
TFT-LCD Bias Supply
Local 5V or 12V Supply
Medical Diagnostic Equipment
Battery Backup
V
5V
IN
OFF ON
5V to 12V, 70mA Step-Up DC/DC Converter
4.7μF
SHDN
V
IN
LT3460
GND
22μH
SW
FB
130k
15k
22pF
1μF
V
12V
70mA
3460 F01
OUT
DESCRIPTION
DC/DC Converter in SC70,
The LT
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 fi 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 × 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.
1.3 MHz/650kHz Step-Up
®
100mA/DIV
3460/LT3460-1 are general purpose step-up DC/
5V/DIV
V
SW
90
85
80
75
70
65
60
I
L
0
Switching Waveforms
ThinSOT and DFN
20
LOAD CURRENT (mA)
LT3460/LT3460-1
Effi ciency
0.2μs/DIV
40
60
3460 F01b
3460 F01a
80
3460fb
1

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lt3460esc6-trpbf Summary of contents

Page 1

... 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 ...

Page 2

... LT3460ES5#PBF LT3460ES5#TRPBF LT3460ESC6#PBF LT3460ESC6#TRPBF LT3460ESC6-1#PBF LT3460ESC6-1#TRPBF LT3460EDC-1#PBF LT3460EDC-1#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER CONDITIONS Minimum Operating Voltage Maximum Operating Voltage Feedback Voltage Feedback Line Regulation 2.5V < V < 16V IN FB Pin Bias Current Supply Current SHDN = 0V Switching Frequency ...

Page 4

LT3460/LT3460-1 TYPICAL PERFORMANCE CHARACTERISTICS Feedback Bias Current –50 –25 0 TEMPERATURE (°C) Switch Saturation Voltage (V ) CESAT 400 (LT3460) 350 I = 250mA C 300 (LT3460 200mA C 250 200 ...

Page 5

BLOCK DIAGRAM 1.255V V IN REFERENCE V OUT R1 (EXTERNAL (EXTERNAL) R (EXTERNAL) S SHDN SHUTDOWN C (EXTERNAL OPTIONAL SOFT-START COMPONENTS S S OPERATION The LT3460/LT3460-1 uses a constant frequency, current mode control ...

Page 6

LT3460/LT3460-1 OPERATION L1 D1 22μ 130k 4.7μF LT3460 3 4 SHDN OFF GND 15k 2 C1: TAIYO YUDEN X5R JMK212BJ475KG C2: TAIYO YUDEN X5R EMK316BJ105 D1: CENTRAL ...

Page 7

OPERATION Layout Hints The high speed operation of the LT3460/LT3460-1 demands careful attention to board layout. You will not get adver- tised performance with careless layout. Figure 5 shows the recommended component placement OUT + C2 ...

Page 8

LT3460/LT3460-1 TYPICAL APPLICATIONS V 100mV/DIV 58mA I LOAD 34mA 5V to 12V with Soft-Start Circuit L1 D1 22μ CONTROL SIGNAL 4.7μF IN 47k LT3460 SHDN FB 47nF GND C1: TAIYO YUDEN X5R JMK212BJ475 C2: ...

Page 9

TYPICAL APPLICATIONS 5V to 12V Step-Up Converter L1 D1 10μ 2.7V TO 4.2V 39. LT3460 4.7μF SHDN FB 13k GND C1: TAIYO YUDEN X5R JMK212BJ475 C2: TAIYO YUDEN X5R JMK212BJ475 D1: PHILIPS PMEG2010 ...

Page 10

LT3460/LT3460-1 APPLICATIONS INFORMATION 2.7V to 4.2V PACKAGE DESCRIPTION 0.62 MAX 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE ...

Page 11

... TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. SC6 Package ...

Page 12

... I <1μA, OUT(MAX 6V 38μA, I <1μA, MS Package OUT(MAX 38V 2.8mA, I <1μA, SC70, OUT(MAX 34V 25μA, I <1μA, OUT(MAX 30V 1.9mA, I <1μA, OUT(MAX 0208 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2007 3460fb ...

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