LM2703EV: 20V @ 27mA, 2.2 ~ 7 Vin

Summary

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.

Specifications

Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number LM2703EV-ND
Eval Board Supplier Texas Instruments
Eval Board -
Topology Step Up
Outputs and Type 1 Non-Isolated
Output Voltage: Factory Set 20 V
Current Out 27 mA
Voltage In 2.2 ~ 7 V
Efficiency @ Conditions >82%, 4.2V in, 20V @ 2 ~ 27 mA Out
>80%, 3.3V in, 20V @ 2 ~ 22 mA Out
>75%, 2.5V in, 20V @ 2 ~ 15 mA Out
Voltage Out Range 1.237 ~ 21 V
Features Current Limit (Adj. or Fixed)
Shutdown, Enable, Standby
Under Voltage Protection, Brown-Out
Switching Frequency - Not Given
Standby Current [Typical] 10 nA
Quiescent Current [Typical] 41 µA
Component Count + Extras 7 + 6
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Cellular Phone
Digital Cameras
Garden Light
LCD and OLED Bias Supplies
LCD Backlighting
MP3 Players
Point of Load (PoL)
Portable Devices
USB Powered Devices
Standby Current [Maximum] 2.5 µA
Quiescent Current [Maximum] 53 µA
Main I.C. Base Part LM2703

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