L5986 [STMicroelectronics]

Description

The 3.0 A (min.) current limitation integrated Power MOSFET in the step-down switching regulator L5986 allows it to deliver up to 2.5 A of current to the load, depending on the application.

While the output voltage can be adjusted from 0.6 V to VIN, the input voltage can range from 2.9 V to 18 V. With a 2.9 V minimum input voltage, the device can also be used with a 3.3 V bus.

The gadget has an internal 250 kHz switching frequency oscillator that can be externally modified up to 1 MHz and requires a minimal set of external components.

The R_thJA can be decreased to 60 °C/W and 40 °C/W, respectively, with the help of the QFN and HSOP packages with an exposed pad.

Features

• Internal soft-start and inhibit

• Low dropout operation: 100% duty cycle

• Voltage feedforward

• Zero load current operation

• Overcurrent and thermal protection

• VFQFPN 3 x 3 mm -8L and HSOP8 package

• 2.5 A 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

Applications

• Computer: optical storage, hard disk drive, printers, audio/graphic cards

• LED driving

• Industrial: chargers, PLD, PLA, FPGA

• Networking: XDSL, modems, DC-DC modules

• Consumer: STB, DVD, DVD recorder, car audio, LCD TV and monitors