Date: 03/10/2008

Dual inverting DC/DC converter from Linear Technology

Linear Technology introduced new triple channel (dual boost plus inverter), 1MHz DC/DC converter, LT3587. It is having an internal 800mA boost and 900mA inverter that can deliver up to 50mA at 15V and 100mA at -8V from a Li-Ion cell, which makes it suitable for CCD imagers & LCD displays.
The device also has 400mA boost channel to generate either a constant current to a string of up to six 20mA white LEDs for LCD backlighting, or a constant voltage to bias an OLED display.

Some of the features include:

1. Easy generation of 15V (50mA), -8V (100mA) & 20V (20mA) from a Li-Ion cell.
2. Input voltage range of 2.5V to 6V, enables it to be powered from Li-Ion to multiple cell Alkaline/NiMH batteries.
3. Wide output ranges up to 32V for the Boosts & up to -32V for the Inverter.
4. Constant 1MHz switching uses tiny, low profile capacitors and inductors and generates low noise outputs that are easy to filter.
5. Output voltages can be set with only one resistor per channel, reducing external component count.
6. "Output disconnect" for the boost channels.
7. Boost3 allows voltage programming and/or current programming for a "one wire current source"
8. Overload fault protection with Fault I/O pin indicator
9. Uses an intelligent soft-start circuit that allows for the sequential powering of the Boost1 output.

Package: 20-pin QFN package
Size: 3mm x 3mm
Pricing: starts at $2.95 each for 1,000-piece quantities.