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ONSEMI MC74AC157DR2G
Integrated Circuits (ICs)

L4978D013TR

Active
STMicroelectronics

DC-DC SWITCHING BUCK (STEP DOWN) REGULATOR, ADJUSTABLE, 8V-55VIN, 3.3V-50VOUT, 2AOUT, SOIC-16 ROHS COMPLIANT: YES

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Search across all available documentation for this part.

DocumentsProduct Change Notice ENTechnical Data Sheet EN+8
ONSEMI MC74AC157DR2G
Integrated Circuits (ICs)

L4978D013TR

Active
STMicroelectronics

DC-DC SWITCHING BUCK (STEP DOWN) REGULATOR, ADJUSTABLE, 8V-55VIN, 3.3V-50VOUT, 2AOUT, SOIC-16 ROHS COMPLIANT: YES

Deep-Dive with AI

DocumentsProduct Change Notice ENTechnical Data Sheet EN+8

Technical Specifications

Parameters and characteristics for this part

SpecificationL4978D013TR
Current - Output2 A
Frequency - Switching [Max]300 kHz
Frequency - Switching [Min]100 kHz
FunctionStep-Down
Mounting TypeSurface Mount
Number of Outputs1
Operating Temperature [Max]150 °C
Operating Temperature [Min]-40 °C
Output ConfigurationPositive
Output TypeAdjustable
Package / Case16-SOIC
Package / Case7.5 mm
Package / Case0.295 "
Supplier Device Package16-SO
Synchronous RectifierFalse
TopologyBuck
Voltage - Input (Max) [Max]55 V
Voltage - Input (Min) [Min]8 V
Voltage - Output (Max) [Max]50 V
Voltage - Output (Min/Fixed)3.3 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
DigikeyN/A 7668$ 3.87
NewarkEach (Supplied on Full Reel) 1000$ 1.93

Description

General part information

L4978 Series

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.