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ST L7981TRRoHS

Manufacturer
ST
MPN
L7981TR
LCSC Part #
C2071852
Packaging
VFQFPN-8(3x3)
Customer #
Key Attributes
3A Buck Switching Regulator
Datasheetpdf iconST L7981TR
In-Stock: 44
44 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.8168$ 1.82
10+$ 1.7746$ 17.75
30+$ 1.747$ 52.41
100+$ 1.7178$ 171.78
Standard Packaging4000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerST
PackagingVFQFPN-8(3x3)
Operating Temperature-40℃~+150℃@(TJ)
Frequency - Switching1MHz
FunctionStep-down type
Number of Outputs1
FeaturesCycle-by-cycle current limiting;Hiccup current limiting;Frequency synchronization;External compensation;Overcurrent Protection
Output TypeAdjustable
TopologyBuck
Operating Voltage4.5V~28V
Switch tube (built-in/external)Built-in
Output Current3A
Output Voltage600mV~28V
Quiescent Current2.4mA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging4000
Sales UnitPiece

Introduction

AI Translation

The L7981 device is a step-down switching regulator with a 3.7 A (minimum) current limited embedded Power MOSFET, so it is able to deliver up to 3A current to the load depending on the application conditions. The input voltage can range from 4.5 V to 28 V, while the output voltage can be set starting from 0.6 V to VIN. Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz. The QFN and the HSOP packages with exposed pad allow reducing the RthJA down to 60℃/W and 40℃/W respectively.

Features

AI Translation
  • 3 A DC output current, 4.5 V to 28 V input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • VFQFPN 3×3 - 8L and HSOP8 package

Applications

AI Translation
  • Consumer: STB, DVD, DVD recorder, car audio, LCD TV and monitors
  • Industrial: PLD, PLA, FPGA, chargers
  • Networking: XDSL, modems, DC - DC modules
  • Computer: Optical storage, hard disk drive, printers, audio/graphic cards
  • Suitable for LED driving