STMicroelectronics L5985

Description

The L5985 is a step-down switching regulator with a 2.5 A (min.) current limited embedded Power MOSFET, so it is able to deliver up to 2 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 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 VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.

Features

• 2 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
• VFQFPN8 3 mm x 3 mm package

Remarks

• Inductor value 15uH is added from design example, refer page number 21.
• Suggested inductor value ranges is also given in table in 7.
• Another 15uH inductor inductor is added from A VERY COMPACT NEW MONOLITHIC STEP-DOWN REGULATOR MANAGES HIGH CURRENT CONVERSIONS
• Output current to be taken from general value. i.e 2A
• Some of the Product and series to be added nearest inductor values rangesREMARKS:-TABLE 7 INDUCTOR

Typical applications

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

More information

• Datasheet
• IC product information