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Part Number: LM2705
Description: The LM2705 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control sc...
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LM2705
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DataSheet
General Description
LM2705 General Description
The LM2705 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control scheme conserves operating current resulting in high efficiency over a wide range of load conditions. The 21V switch allows for output voltages as high as 20V. The low 400ns off-time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in spaceconscious portable applications. The LM2705 is ideal for LCD panels requiring low current and high efficiency as well as white LED applications for cellular phone back-lighting.
The LM2705 can drive up to 3 white LEDs from a single Li-Ion battery. The low peak inductor current of the LM2705 makes it ideal for USB applications.
LM2705 Maximum Ratings
VIN 7.5V
SW Voltage 21V
FB Voltage 2V
SHDN Voltage 7.5V
Maximum Junction Temp. TJ 150
(Note 2)
Lead Temperature
(Soldering 10 sec.) 300
Vapor Phase
(60 sec.) 215
Infrared
(15 sec.) 220
ESD Ratings (Note 3)
Human Body Model 2kV
Machine Model (Note 4) 200V
SW Voltage 21V
FB Voltage 2V
SHDN Voltage 7.5V
Maximum Junction Temp. TJ 150
(Note 2)
Lead Temperature
(Soldering 10 sec.) 300
Vapor Phase
(60 sec.) 215
Infrared
(15 sec.) 220
ESD Ratings (Note 3)
Human Body Model 2kV
Machine Model (Note 4) 200V
LM2705 Features
·150mA, 0.7Ω, internal switch
·Uses small surface mount components
·Adjustable output voltage up to 20V
·2.2V to 7V input range
·Input undervoltage lockout
·0.01µA shutdown current
·Small 5-Lead SOT-23 package
·Uses small surface mount components
·Adjustable output voltage up to 20V
·2.2V to 7V input range
·Input undervoltage lockout
·0.01µA shutdown current
·Small 5-Lead SOT-23 package
LM2705 Typical Application
·LCD Bias Supplies
·White LED Back-Lighting
·Handheld Devices
·Digital Cameras
·Portable Applications
·White LED Back-Lighting
·Handheld Devices
·Digital Cameras
·Portable Applications
LM2705
PDF/DataSheet Download
- Datasheet: LM2705
- File Size: 376008 KB
- Manufacturer: NATIONAL
- Click here to Download
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