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L4978D Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
L4978DST118Yes

L4978D is a switching regulator IC manufactured by SGS-THOMSON (now STMicroelectronics).

The L4978D is a switching regulator IC manufactured by SGS-THOMSON (now STMicroelectronics). Below are the factual specifications, descriptions, and features from the Manufactor Datasheet:

Specifications:

  • Output Voltage: Adjustable from 3.3V to 50V
  • Output Current: Up to 2.5A
  • Input Voltage Range: 8V to 55V
  • Switching Frequency: 200 kHz (fixed)
  • Efficiency: Up to 90%
  • Operating Temperature Range: -40°C to +150°C
  • Package: PowerDIP-16 or SO-16

Descriptions:

  • The L4978D is a step-down (buck) switching regulator designed for high-efficiency DC-DC conversion.
  • It includes an internal power MOSFET, PWM controller, and protection features.
  • Suitable for industrial, automotive, and power supply applications.

Features:

  • Internal Power MOSFET: Reduces external component count.
  • Soft-Start: Prevents inrush current at startup.
  • Overcurrent Protection: Limits output current to safe levels.
  • Thermal Shutdown: Protects the IC from overheating.
  • Under-Voltage Lockout (UVLO): Ensures proper operation within input voltage range.
  • Adjustable Output Voltage: Set via external resistors.

This information is based on the manufacturer's datasheet for the L4978D by SGS-THOMSON (STMicroelectronics).

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