LTC1778/LTC1778-1 1778fb No RSENSEWide Operating Range, TM Step-Down Controller is a synchronous step-down switching regulator controller without resistor, which has extremely fast transient response and stable ceramic COUT. It can be used in notebook computers and palmtop computers.
The LTC1778/LTC1778-1 is a synchronous step‑down switching regulator controller optimized for CPU power. It uses a valley‑current control architecture that delivers very low duty cycles and excellent transient response without a sense resistor. The device supports a wide input voltage range and offers features such as adjustable on‑time, programmable soft‑start, and optional short‑circuit shutdown.
The datasheet includes detailed electrical characteristics, absolute maximum ratings, pin descriptions, typical performance graphs, package dimensions, and example application circuits. It is intended for designers of notebook and palmtop computers, distributed power systems, and other high‑efficiency power‑conversion applications.
| Input Supply Voltage (Vin) | up to 36 V |
|---|---|
| Operating Voltage Range (Vout) | 4 V to 36 V |
| Package Type | 16‑Lead Plastic SSOP (Narrow 0.150) |
The LTC1778 can operate with an input supply voltage up to 36 V.
Pin 2 (PGOOD) provides an open‑drain Power Good output that is pulled low when the output voltage is out of regulation.
The device is supplied in a 16‑lead narrow‑pitch SSOP package.