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Linear Technology Electronic Components Datasheet

LTC3525ESC6-5 Datasheet

400mA Micropower Synchronous Step-Up DC/DC Converter

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LTC3525-3/
LTC3525-3.3/LTC3525-5
400mA Micropower
Synchronous Step-Up DC/DC
Converter with Output Disconnect
Features
n Up to 95% Efficiency
n Output Disconnect and Inrush Current Limit
n Fixed Output Voltages of 3V, 3.3V or 5V
n Delivers 65mA at 3V from a 1V Input
n Delivers 60mA at 3.3V from a 1V Input,
or 140mA at 3.3V from a 1.8V Input
n Delivers 175mA at 5V from a 3V Input
n Burst Mode® Operation: IQ = 7µA
n Only Three External Components
n VIN > VOUT Operation
n <1µA Shutdown Current
n Antiringing Control
n Short-Circuit and Overtemperature Protection
n Very Low Profile of 1mm
n Tiny 6-Lead SC70 Package
Applications
n MP3 Players
n Portable Instruments
n Glucose Meters
n Digital Cameras
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Patents pending.
Description
The LTC®3525-3/LTC3525-3.3/LTC3525-5 are high efficiency
synchronous step-up DC/DC converters with output discon-
nect that can start up with an input as low as 0.85V. They
offer a compact, high efficiency alternative to charge pumps
in single cell or dual cell alkaline or Li-Ion applications. Only
three small external components are required. The LTC3525
is offered in fixed output voltages of 3V, 3.3V or 5V.
The device includes a 0.5Ω N-channel MOSFET switch and
a 0.8Ω P-channel synchronous rectifier. Peak switch current
ranges from 150mA to 400mA, depending on load, providing
enhanced efficiency. Quiescent current is an ultralow 7µA,
maximizing battery life in portable applications.
Other features include <1µA shutdown current, anti-
ringing control and thermal shutdown. The LTC3525 is
available in a tiny 6-Lead SC70 package.
List of LTC3525 Options
PART NAME INPUT START-UP
VOLTAGE
LTC3525-3
0.85V
LTC3525-3.3
0.85V
LTC3525-5
0.85V
LTC3525D-3.3
0.85V
LTC3525L-3
0.7V
OUTPUT
VOLTAGE
3V
3.3V
5V
3.3V
3V
VOUT STATUS IN
SHUTDOWN MODE
Output Disconnect
Output Disconnect
Output Disconnect
Pass Through Mode
Output Disconnect
Typical Application
L1*
10µH
VIN
1V TO 1.6V
OFF ON
1µF
LTC3525-3.3
VIN
SW
SHDN
VOUT
GND
GND
VOUT
3.3V
60mA
10µF
3525 TA01
*MURATA LQH32CN100K53
LTC3525-3.3 Efficiency and Power
Loss vs Load Current
100
100
90
80
10
EFFICIENCY
70
60
1
POWER LOSS
50
40
30
20
0.01 0.1
1
10
LOAD (mA)
0.1
VIN = 3V
VIN = 2.4V
VIN = 1.2V
0.01
100 1000
LT3525 • TA02
For more information www.linear.com/LTC3525
3525fc
1


Linear Technology Electronic Components Datasheet

LTC3525ESC6-5 Datasheet

400mA Micropower Synchronous Step-Up DC/DC Converter

No Preview Available !

LTC3525-3/
LTC3525-3.3/LTC3525-5
Absolute Maximum Ratings
(Note 1)
VIN, VOUT Voltage......................................... – 0.3V to 6V
SW Voltage.................................................. – 0.3V to 6V
SW Voltage < 100ns..................................... –0.3V to 7V
SHDN Voltage.............................................. –0.3V to 6V
Operating Junction Temperature Range
(Notes 2, 5)............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
TOP VIEW
SHDN 1
GND 2
VIN 3
6 SW
5 GND
4 VOUT
SC6 PACKAGE
6-LEAD PLASTIC SC70
TJMAX = 125°C
θJA = 256°C/W IN FREE AIR, θJA = 150°C/W ON BOARD OVER GROUND PLANE
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3525ESC6-3#PBF
LTC3525ESC6-3#TRPBF
LCDR
6-Lead Plastic SC70
LTC3525ISC6-3#PBF
LTC3525ISC6-3#TRPBF
LCDR
6-Lead Plastic SC70
LTC3525ESC6-3.3#PBF LTC3525ESC6-3.3#TRPBF
LBTG
6-Lead Plastic SC70
LTC3525ISC6-3.3#PBF LTC3525ISC6-3.3#TRPBF
LBTG
6-Lead Plastic SC70
LTC3525ESC6-5#PBF
LTC3525ESC6-5#TRPBF
LBWT
6-Lead Plastic SC70
LTC3525ISC6-5#PBF
LTC3525ISC6-5#TRPBF
LBWT
6-Lead Plastic SC70
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
3525fc
2
For more information www.linear.com/LTC3525


Part Number LTC3525ESC6-5
Description 400mA Micropower Synchronous Step-Up DC/DC Converter
Maker Linear
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LTC3525ESC6-5 Datasheet PDF






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