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L4978D

DC-DC Switching Buck (Step Down) Regulator, Adjustable, 8V-55Vin, 3.3V-50Vout, 2Aout, SOIC-16

STMICROELECTRONICS L4978D

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Manufacturer Part No:
L4978D
Order Code:
1077139
Technical Datasheet:
L4978D   Datasheet
See all Technical Docs

Product Overview

The L4978D is a step-down monolithic power Switching Regulator delivering 2A at a voltage between 3.3 and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25R) to obtain very high efficiency and high switching speed. A switching frequency up to 300kHz is achievable. A wide input voltage range between 8 to 55V and output voltage regulated from 3.3 to 50V cover the majority of today's applications. Features of this new generation of DC-to-DC converter include pulse-by-pulse current limit, hiccup mode for short-circuit protection, voltage feed-forward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
  • Protection against feedback disconnection
  • Inhibit for zero current consumption
  • Zero load current operation
  • Internal current limiting (pulse-by pulse and hiccup mode)
  • Precise 3.3V (±1%) internal reference voltage

Applications

Power Management

Product Information

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:
Buck (Step Down)

:
8V

:
55V

:
1Outputs

:
SOIC

:
16Pins

:
2A

:
3.3V

:
50V

:
300kHz

:
150°C

:
-

:
-

:
-
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Technical Docs (2)

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