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See Technical Specifications

L4978

Step-down type Adjustable 3.3V~50V 2A 8V~55V DIP-8 DC-DC Converters ROHS

Manufacturer:

Stmicroelectronics
Mfr.Part #:

L4978
Datasheet:

L4978 Datasheet (PDF)
Input Voltage Min Volt:

8.0
Input Voltage Max Volt:

55.0
Operating Temp Min Celsius:

-40.0
Operating Temp Max Celsius:

150.0
EDA/CAD Models:

Request Free CAD Models for L4978

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Tel: +852 95804164

L4978 General Description

The L4978 is a step down monolithic power switching regulator delivering 2A at a voltage between 3.3V 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 Rdsonof 0.25Ω) to obtain very high efficency and high switching speed.A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications. Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.The device is available in plastic dual in line, DIP-8 for standard assembly, and SO16W for SMD assembly.

Key Features

PROTECTION AGAINST FEEDBACK DISCONNECTION
INHIBIT FOR ZERO CURRENT CONSUMPTION
SOFT START FUNCTION
THERMAL SHUTDOWN
ZERO LOAD CURRENT OPERATION
VOLTAGE FEEDFORWARD
UP TO 2A STEP DOWN CONVERTER
PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
OPERATING INPUT VOLTAGE FROM 8V TO 55V
SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
INTERNAL CURRENT LIMITING (PULSE-BYPULSE AND HICCUP MODE)
OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

Specifications

Input Voltage Min Volt	8.0	Input Voltage Max Volt	55.0
Operating Temp Min Celsius	-40.0	Operating Temp Max Celsius	150.0
ECCN US	EAR99	ECCN EU	NEC
Packing Type	Tube	Grade	Industrial

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Ratings and Reviews

L**m 11/28/2022

Everything is clearly propane, i recommend

M**n 07/22/2020

As in the description until the check came quickly

D**s 02/15/2020

Standard 3mm ledsPacked in a kind of envelope lined from the inside with a puffyCome in different ziplock type bags and all these bags in one biggerEfficiency did not check, i think it will not be a problem

C**n 02/10/2020

Everything is fine, only shipping 77 days.