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L4973D5.1

DC-DC Switching Buck (Step Down) Regulator, Adjustable, 8V-55Vin, 5.1V-50Vout, 3.5Aout, SOIC-20

STMICROELECTRONICS L4973D5.1

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Manufacturer Part No:
L4973D5.1
Order Code:
2460729
Technical Datasheet:
L4973D5.1   Datasheet
See all Technical Docs

Product Overview

The L4973D5.1 is a step-down monolithic power Switching Regulator delivering 3.5A at fixed voltage of 3.3 or 5.1V and using a simple external divider output adjustable voltage up to 50V. Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical RDS(on) of 0.15R) to obtain very high efficiency and very fast switching times. Switching frequency up to 300kHz is achievable. A wide input voltage range between 8 to 55V and output voltages regulated from 3.3 to 40V cover the majority of the today applications. Features of this new generation of DC-to-DC converter includes pulse by pulse current limit, hiccup mode for output short-circuit protection, voltage feed-forward regulation, soft-start, input/output synchronization, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
  • Inhibit for zero current consumption (100mA at VCC=24V)
  • Input/output synchronization function
  • Protection against feedback disconnection
  • Output overvoltage protection
  • Internal current limiting (pulse by pulse and HICCUP mode)
  • Zero load current operation (minimum 1mA)
  • Precise 5.1V (1.5%) reference voltage externally available

Applications

Power Management

Product Information

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:
Buck (Step Down)

:
8V

:
55V

:
1Outputs

:
SOIC

:
20Pins

:
3.5A

:
5.1V

:
50V

:
100kHz

:
150°C

:
-

:
-

:
MSL 3 - 168 hours
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Technical Docs (2)

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