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ST L4978RoHS

Manufacturer
ST
MPN
L4978
LCSC Part #
C53329
Packaging
DIP-8
Customer #
Key Attributes
2A Step Down Switching Regulator
Datasheetpdf iconST L4978
In-Stock: 112
112 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 2.8043$ 2.80
10+$ 2.4218$ 24.22
50+$ 2.1826$ 109.13
100+$ 1.9368$ 193.68
500+$ 1.8261$ 913.05
1,200+$ 1.7789$ 2134.68
Standard Packaging50/Full Tube
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerST
PackagingDIP-8
Operating Temperature-40℃~+150℃@(TJ)
Frequency - Switching300kHz
FunctionStep-down type
Number of Outputs1
FeaturesCycle-by-cycle current limiting;Hiccup current limiting;Adjustable soft-start
Output TypeAdjustable
TopologyBuck
Operating Voltage8V~55V
Switch tube (built-in/external)Built-in
Output Voltage3.3V~50V
Output Current2A
Quiescent Current2.5mA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging50
Sales UnitPiece

Introduction

AI Translation

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 Rdson of 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 DCDC 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, DIP8 for standard assembly, and SO16W for SMD assembly.

Features

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