STMicroelectronics | L7981ATR

The L7981ATR is a step down switching regulator with 3.7 A (minimum) current limited embedded power MOSFET, so it si able to deliver up to 3 A current to the load depending on the application conditions.

The input voltage can range from 4.5 V to 28 V, while the output voltage can be set starting from 0.6 V to VIN. 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.

Features:

• 3 A DC output current
• 4.5 V to 28 V input voltage
• Output voltage adjustable from 0.6 V
• 250 kHz switching frequency, programmable up to 1 MHz
• Internal soft-start and enable
• Low dropout operation: 100% duty cycle
• Voltage feed-forward
• Zero load current operation
• Overcurrent and thermal protection
• VFQFPN3x3-8L and HSOP8 package

Applications:

• Consumer: STB, DVD, DVD recorder, car audio, LCD TV and monitors
• Industrial: PLD, PLA, FPGA, chargers
• Networking: XDSL, modems, DC-DC modules
• Computer: Optical storage, hard disk drive, printers, audio/graphic cards
• Suitable for LED driving

 View the Complete family of L798 Switching Regulators