The LT1944 is a dual micropower step-up DC/DC converter from Linear Technology Corporation. The converter is packaged in a 10-pin MSOP package and has an operating voltage range of 1.2V to 15V. The converter can output up to 350mA of current and has a static current of only 20µA. The switch voltage is 36V and the converter can easily generate up to 34V of output voltage without the use of a transformer.
This handbook describes the LT1944 dual micropower step‑up DC/DC converter, highlighting its low quiescent current (20 µA in active mode, <1 µA in shutdown), wide input range (1.2 V to 15 V) and high output capability (up to 34 V). Key features such as a 250 mV switch saturation voltage at 300 mA and a 400 ns off‑time are detailed.
The document includes absolute maximum ratings, electrical characteristics, pin functions, and typical application circuits. It offers design guidance on selecting inductors, capacitors, and diodes, and provides example boost‑converter layouts for dual‑output (5 V/30 V) and multi‑output LCD power supplies.
| Minimum Input Voltage | 1.2 V |
|---|---|
| Switch Saturation Voltage | 250 mV at 300 mA |
| Switch Current Limit | 250‑350 mA |
Tie the shutdown pin to 0.9 V or higher to enable the device; below 0.25 V turns it off.
A 4.7 µH inductor is recommended for most designs with output voltages below 7 V.