Datasheet LTC3525L-3 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect |
| 页数 / 页 | 12 / 1 — FEATURES. DESCRIPTION. Start-Up at 0.7V Typical, 0.88V Guaranteed. Up to … |
| 文件格式/大小 | PDF / 504 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Start-Up at 0.7V Typical, 0.88V Guaranteed. Up to 95% Efficiency
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LTC3525L-3 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect
FEATURES DESCRIPTION
n
Start-Up at 0.7V Typical, 0.88V Guaranteed
The LTC®3525L-3 is a high efficiency synchronous step- n
Up to 95% Efficiency
up DC/DC converter with output disconnect that can n
Output Disconnect and Inrush Current Limit
start up with an input as low as 0.7V. It offers a compact, n
3V Fixed Output Voltage
high efficiency alternative to charge pumps in single n
Delivers 65mA at 3V from a 1V Input or 160mA
cell or dual cell alkaline applications. Only three small
from a 1.8V Input
external components are required. The LTC3525L-3 n
Burst Mode® Operation: IQ = 7µA
generates a fixed 3V output voltage. n VIN: 0.5V to 4.5V The device includes a 0.5 N-channel MOSFET switch n Only Three External Components and a 0.85 P-channel synchronous rectifier. Peak switch n VIN > VOUT Operation current ranges from 150mA to 400mA, depending on n <1µA Shutdown Current load, providing enhanced efficiency. Quiescent current n Anti-Ringing Control is an ultralow 7µA, maximizing battery life in portable n Short-Circuit and Overtemperature Protection applications. n Tiny 6-Pin SC70 Package Other features include <1µA shutdown current, anti-
APPLICATIONS
ringing control and thermal shutdown. The LTC3525L-3 is available in a tiny 6-pin SC70 package. n MP3 Players L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n Portable Instruments and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Glucose Meters property of their respective owners. Patents pending. n Digital Cameras
TYPICAL APPLICATION LTC3525L-3 Efficiency and Power Loss vs Load Current
L1* 100 100 10µH 90 80 10 POWER LOSS (mW) LTC3525L-3 V EFFICIENCY IN VIN SW 0.9V TO 1.6V 70 VOUT OFF ON SHDN V 3V 60 1 OUT 65mA POWER LOSS 50 GND GND EFFICIENCY (%) 1µF 10µF 40 0.1 30 V 3525 TA01 IN = 2.4V *MURATA LQH32CN100K53 VIN = 1.2V 20 0.01 0.01 0.1 1 10 100 1000 LOAD (mA) LT3525 • TA02 3525lfa 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Package Description Revision History Typical Applications Related Parts
FEATURES DESCRIPTION
n
Start-Up at 0.7V Typical, 0.88V Guaranteed
The LTC®3525L-3 is a high efficiency synchronous step- n
Up to 95% Efficiency
up DC/DC converter with output disconnect that can n
Output Disconnect and Inrush Current Limit
start up with an input as low as 0.7V. It offers a compact, n
3V Fixed Output Voltage
high efficiency alternative to charge pumps in single n
Delivers 65mA at 3V from a 1V Input or 160mA
cell or dual cell alkaline applications. Only three small
from a 1.8V Input
external components are required. The LTC3525L-3 n
Burst Mode® Operation: IQ = 7µA
generates a fixed 3V output voltage. n VIN: 0.5V to 4.5V The device includes a 0.5 N-channel MOSFET switch n Only Three External Components and a 0.85 P-channel synchronous rectifier. Peak switch n VIN > VOUT Operation current ranges from 150mA to 400mA, depending on n <1µA Shutdown Current load, providing enhanced efficiency. Quiescent current n Anti-Ringing Control is an ultralow 7µA, maximizing battery life in portable n Short-Circuit and Overtemperature Protection applications. n Tiny 6-Pin SC70 Package Other features include <1µA shutdown current, anti-
APPLICATIONS
ringing control and thermal shutdown. The LTC3525L-3 is available in a tiny 6-pin SC70 package. n MP3 Players L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n Portable Instruments and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Glucose Meters property of their respective owners. Patents pending. n Digital Cameras
TYPICAL APPLICATION LTC3525L-3 Efficiency and Power Loss vs Load Current
L1* 100 100 10µH 90 80 10 POWER LOSS (mW) LTC3525L-3 V EFFICIENCY IN VIN SW 0.9V TO 1.6V 70 VOUT OFF ON SHDN V 3V 60 1 OUT 65mA POWER LOSS 50 GND GND EFFICIENCY (%) 1µF 10µF 40 0.1 30 V 3525 TA01 IN = 2.4V *MURATA LQH32CN100K53 VIN = 1.2V 20 0.01 0.01 0.1 1 10 100 1000 LOAD (mA) LT3525 • TA02 3525lfa 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Package Description Revision History Typical Applications Related Parts