STMicroelectronics L5981

Description

The L5981 is a step-down switching regulator with a 1.5 A (min.) current limited embedded Power MOSFET, so it is able to deliver in excess of 1 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 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 VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.

Features

• 1 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 packageREMARKS:-Refer page no 16Table 7. Inductors

Typical applications

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

More information

• Datasheet
• IC product information