STMicroelectronics L5986

Description

The L5986 is a step-down switching regulator with a 3.0 A (min.) current limited embedded Power MOSFET, so it is able to deliver up to 2.5 Acurrent to the load depending on the application conditions.

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 of2.9 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 that can be externallyadjusted up to 1 MHz.

The QFN and the HSOP packages with an exposed pad allow reducing the RthJA down to 60 °C/W and 40 °C/W respectively.

Features

• 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
• 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

Remarks

• 12uH inductor is added from desing example
• Suggested inductors value range is also given in table7.
• Output current to be taken from general value. i.e 2.5
• Some of the Product and series to be added nearest inductor values rangesREMARKS:-TABLE 7. INDUCTORS

Typical applications

• Consumer: STB, DVD, DVD recorder, car
• Computer: optical storage, hard disk drive,
• Industrial: chargers, PLD, PLA, FPGA
• LED driving
• Networking: XDSL, modems, DC-DC modules

More information

• Datasheet
• IC product information