Part Number : L5981

Function : 1A, Step-down Switching Regulator

Package : VFQFPN8 3mm x 3mm

Maker : STMicroelectronics

Pinouts :
L5981 datasheet

Description :

The L5981 is a step-down switching regulator with a 1.5 A (min.) current limited embedded
Power MOSFET, so it is able to deliver in excess of 1 A DC current to the load depending on the
application condition. The input voltage can range from 2.9 V to 18 V, while the output voltage can be set starting from 0.6 V to VIN . Having a minimum input voltage of 2.9 V, the device is suitable also for a 3.3 V bus. Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator thatcan be externally adjusted up to 1 MHz.
The VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately
60 °C/W.


1. 1 A DC output current
2. 2.9 V to 18 V input voltage
3. Output voltage adjustable from 0.6 V
4. 250 kHz switching frequency, programmable up to 1 MHz
5. Internal soft-start and inhibit
6. Low dropout operation: 100% duty cycle
7. Voltage feedforward
8. Zero load current operation
9. Overcurrent and thermal protection
10. VFQFPN8 3 mm x 3 mm package


1. Consumer: STB, DVD, DVD recorder, car audio, LCD TV and monitors
2. Industrial: chargers, PLD, PLA, FPGA
3. Networking: XDSL, modems, DC-DC modules
4. Computer: optical storage, hard disk drive, printers, audio/graphic cards
5. LED driving

Datasheet PDF Download :
L5981 pdf

Others datasheet of same file : L-5981
2021/03/27 13:52 2021/03/27 13:52