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L7981ATR The L7981ATR is a step-down (buck) switching regulator from STMicroelectronics. It delivers up to 3A of output current from a 4.5V input with an adjustable output voltage.
Mfr Part #:

L7981ATR

Available from 4 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The L7981ATR is a step-down (buck) switching regulator from STMicroelectronics. It delivers up to 3A of output current from a 4.5V input with an adjustable output voltage.
✓ Total Stock: 15,097 pcs
$ Price Range: $0.16

L7981ATR Available from 4 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Optech Co.,Limited ✓
Non-Authorised Inventory information
10,000 pcs
On Request
10000 pcs On Request 1 On Request On Request 21+ On Request On Request
Fe Components ✓
Non-Authorised Inventory information
2,500 pcs
On Request
2500 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
1,597 pcs
On Request
1597 pcs On Request 1 On Request On Request On Request On Request On Request
Braun Electronic Components ✓
Non-Authorised Inventory information
1,000 pcs
On Request
1000 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

L7981ATR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Frequency
Function
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Type
SVHC Present
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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L7981ATR Description

Short technical summary and product information.

The L7981ATR is a step-down (buck) switching regulator from STMicroelectronics designed for high-efficiency power conversion. It operates from a 4.5V input voltage and provides a single adjustable positive output capable of delivering up to 3A of continuous current.

 

The device uses a buck topology and features a switching frequency range of 250 kHz to 1 MHz, allowing designers to optimize between efficiency and external component size. It is a non-synchronous rectifier design, which simplifies the external component count for many applications.

 

The L7981ATR is housed in an 8-SOIC (0.154", 3.90mm Width) exposed pad package, also known as the 8-HSOP supplier device package. This surface-mount package with an exposed pad aids in thermal management, supporting an operating junction temperature range of -40°C to 150°C.

L7981ATR Quick Information

Product Type: DC-DC Switching Regulator
Canonical Name: STMicroelectronics L7981ATR DC-DC Switching Regulator
Subcategory: DC-DC Switching Regulator

L7981ATR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

L7981ATR Estimated Pricing

Qty Low High
1+ $0.16 $0.16

Estimated market price range - modelled values for guidance only, not live distributor offers.

L7981ATR Features

  • Step-down buck topology for voltage regulation.
  • Delivers up to 3A output current.
  • Adjustable output voltage configuration.
  • Switching frequency from 250 kHz to 1 MHz.
  • Surface-mount 8-HSOP package with exposed pad.

L7981ATR Applications

  • Point-of-load regulation for FPGA supplies.
  • Industrial power supply step-down conversion.
  • Consumer electronics battery-powered devices.
  • Distributed power architecture bus converters.
  • Automotive infotainment system power management.

L7981ATR FAQs

6 frequently asked questions generated from this part’s specifications.
What is the input voltage of the L7981ATR?

The input voltage is 4.5 V.

What is the output current capability of the L7981ATR?

The L7981ATR can deliver up to 3 A.

What is the operating temperature range of the L7981ATR?

The operating junction temperature range is -40°C to 150°C.

What package does the L7981ATR come in?

The L7981ATR is available in an 8-SOIC (0.154", 3.90mm Width) Exposed Pad package, also known as 8-HSOP.

Is the output voltage of the L7981ATR adjustable?

Yes, the output type is adjustable.

What is the switching frequency of the L7981ATR?

The switching frequency range is 250 kHz to 1 MHz.

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