L5981 Description
The L5981 is a step-down switching regulator with a 1.5 A (min.) current restricted integrated Power MOSFET that can deliver more than 1 A DC current to the load depending on the application. The input voltage can be set between 2.9 V and 18 V, while the output voltage can be set between 0.6 V and VIN. With a minimum input voltage of 2.9 V, the L5981 can also be used on a 3.3 V bus.
The L5981, which requires only a few external components, features an internal 250 kHz switching frequency oscillator that can be externally modified up to 1 MHz.
L5981 Features
1A DC output current
2.9 V to 18 V input voltage
Output voltage adjustable from 0.6 V
250 kHz switching frequency, programmable up to 1 MHz
Internal soft-start and inhibit
Low dropout operation: 100 % duty cycle
Voltage feed-forward
Zero loads current operation
Overcurrent and thermal protection
VFQFPN8 3 mm x 3 mm package
L5981 Applications
LED driving
Consumer: STB, DVD, DVD recorder, car audio, LCD TV, and monitors
Industrial: chargers, PLD, PLA, FPGA
Networking: XDSL, modems, DC-DC modules
Computer: optical storage, hard disk drive, printers, audio/graphic cards
