Datasheet Analog Devices LT1943 — Datenblatt

LT1943
High Current Quad Output
Regulator for TFT LCD Panels
U FEATURES DESCRIPTIO ■ The LT®1943 quad output adjustable switching regulator
provides power for large TFT LCD panels. The device,
housed in a low profile 28 pin thermally enhanced TSSOP
package, can generate a 3.3V or 5V logic supply along with
the triple output supply required for the TFT LCD panel.
Operating from an input range of 4.5V to 22V, a step-down
regulator provides a low voltage output VLOGIC with up to
2A current. A high-power step-up converter, a lowerpower step-up converter and an inverting converter provide the three independent output voltages AVDD, VON and
VOFF required by the LCD panel. A high-side PNP provides
delayed turn-on of the VON signal and can handle up to
30mA. Protection circuitry ensures that VON is disabled if
any of the four outputs are more than 10% below the
programmed voltage. ■
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■ 4 Integrated Switches: 2.4A Buck, 2.6A Boost, …