1FEATURES

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.