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LM2705MF-ADJ 데이터시트(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 LM2705MF-ADJ
상세설명  Micropower Step-up DC/DC Converter with 150mA Peak Current Limit
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2705MF-ADJ 데이터시트(HTML) 1 Page - National Semiconductor (TI)

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LM2705
Micropower Step-up DC/DC Converter with 150mA Peak
Current Limit
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 space-
conscious 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.
Features
n
150mA, 0.7
Ω, internal switch
n
Uses small surface mount components
n
Adjustable output voltage up to 20V
n
2.2V to 7V input range
n
Input undervoltage lockout
n
0.01µA shutdown current
n
Small 5-Lead SOT-23 package
Applications
n
LCD Bias Supplies
n
White LED Back-Lighting
n
Handheld Devices
n
Digital Cameras
n
Portable Applications
Typical Application Circuit
20039701
FIGURE 1. Typical 20V Application
April 2003
© 2003 National Semiconductor Corporation
DS200397
www.national.com


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