LM2703 Micropower Step-up DC/DC Converter

LM2703 Micropower Step-up DC/DC Converter

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 21V switch allows for output voltages as high as 20V. The low 400ns off-time .

Features

n n n n n n n 350mA, 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 Applications n n n n n LCD Bias Supplies White LED Back-Lighting Handheld Devices Digital Cameras Portable Applications Typical Application Circuit 20030601 FIGURE 1. Typical 20V Application © 2003 National Semiconductor Corporation DS200306 www.national.com LM2703 Connection Diagram Top View 20030602 TJmax SOT23-5 = 125˚C, θJA = 220˚C/W (Note 2) Ordering Information .