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L7981A

L7981A

L7981ATR

L7981ATR

L7981TR

Active

3 A step-down switching regulator

Quantity $ per Unit Savings
1 - 9$2.340%
10 - 24$2.1210%
25 - 99$2.0015%
100 - 249$1.7027%
250 - 499$1.6032%
500$1.4040%
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Out of stock
$2.34
Parameter NameParameter Value
Input Voltage Min Volt4.5
Input Voltage Max Volt28.0
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius150.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameQFN-8L P 0.5 mm

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 3 A 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 RthJAdown to 60°C/W and 40°C/W respectively.

Key features
  • 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 x 3 - 8L and HSOP8 package