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LTC3525L-3 Datasheet, PDF (1/12 Pages) Linear Technology – 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect | |||
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LTC3525L-3
400mA Micropower
Synchronous Step-Up DC/DC
Converter with Output Disconnect
FEATURES
â Startup at 0.7V Typical, 0.88V Guaranteed
â Up to 95% Efï¬ciency
â Output Disconnect and Inrush Current Limit
â 3V Fixed Output Voltage
â Delivers 65mA at 3V from a 1V Input or 160mA
from a 1.8V input
â Burst Mode® Operation: IQ = 7µA
â VIN: 0.5V to 4.5V
â Only Three External Components
â VIN > VOUT Operation
â <1µA Shutdown Current
â Antiringing Control
â Short-Circuit and Overtemperature Protection
â Tiny 6-Pin SC70 UPackage
APPLICATIO S
â MP3 Players
â Portable Instruments
â Glucose Meters
â Digital Cameras
DESCRIPTIO
The LTC®3525L-3 is a high efï¬ciency synchronous step-
up DC/DC converter with output disconnect that can
start up with an input as low as 0.7V. It offers a compact,
high efï¬ciency alternative to charge pumps in single
cell or dual cell alkaline applications. Only three small
external components are required. The LTC3525L-3
generates a ï¬xed 3V output voltage.
The device includes a 0.5 N-channel MOSFET switch
and a 0.85 P-channel synchronous rectiï¬er. Peak switch
current ranges from 150mA to 400mA, depending on
load, providing enhanced efï¬ciency. 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 LTC3525L-3
is available in a tiny 6-pin SC70 package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Patents Pending.
TYPICAL APPLICATIO
VIN
0.9V to 1.6V
OFF ON
1µF
L1*
10µH
LTC3525L-3
VIN
SW
SHDN
VOUT
GND
GND
VOUT
3V
65mA
10µF
3525 TA01
*MURATA LQH32CN100K53
LTC3525L-3 Efï¬ciency and Power
Loss vs Load Current
100
100
90
80
10
EFFICIENCY
70
60
1
POWER LOSS
50
40
0.1
30
20
0.01 0.1
1
10
LOAD (mA)
VIN = 2.4V
VIN = 1.2V
0.01
100 1000
LT3525 ⢠TA02
3525lf
1
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