LM2703MFX-ADJ Datasheet, PDF (1/19 Pages) Texas Instruments – LM2703 Micropower Step-Up DC/DC Converter with 350mA Peak Current Limit

LM2703
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SNVS172F – FEBRUARY 2002 – REVISED MAY 2013
LM2703 Micropower Step-Up DC/DC Converter with 350mA Peak Current Limit
Check for Samples: LM2703
FEATURES
1
•2 350mA, 0.7Ω, Internal Switch
• Uses Small Surface Mount Components
• Adjustable Output Voltage up to 21V
• 2.2V to 7V Input Range
• Input Undervoltage Lockout
• 0.01µA Shutdown Current
• Small 5-Lead SOT-23 Package
APPLICATIONS
• LCD Bias Supplies
• White LED Back-Lighting
• Handheld Devices
• Digital Cameras
• Portable Applications
DESCRIPTION
The LM2703 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 22V switch allows for output voltages
as high as 21V. 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 LM2703 is ideal for LCD
panels requiring low current and high efficiency as
well as white LED applications for cellular phone
back-lighting. The LM2703 can drive up to 4 white
LEDs from a single Li-Ion battery.
Typical Application Circuit
V_IN = Li-Ion
L
10 PH
D
20V
15 mA
C_IN
4.7 PF
5
1
V_IN
SW
4
LM2703
3
SHDN
FB
GND
2
R1
510k
R2
33k
C_OUT
1 PF
C_IN: Taiyo Yuden Ceramic
C_OUT: Taiyo Yuden Ceramic
L: Coilcraft DT1608C-103 or Murata
LQY33PN100M02
(low profile)
D: Motorola MBRM130LT3
Figure 1. Typical 20V Application
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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