STMicroelectronics L5987

Description

The L5987 is a step-down switching regulator with a 3.5 A (minimum) current limited embedded Power MOSFET, so it is able to deliver an up to 3 A current 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 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 that can be externally adjusted up to 1 MHz.

The VFQFPN8 and the HSOP packages with an exposed pad allow reducing the RthJAdown to 60 °C/W and 40 °C/W respectively.

Features

• 3 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 -8L and HSOP8 package

Typical applications

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

More information

• Datasheet
• IC product information