STMicroelectronics L7985A

Description

The L7985/A is a step-down switching regulator with a 2.5 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions. The input voltage can range from 4.5 V to 38 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. The DFN and the HSOP packages with exposed pad allow the reduction of RthJA down to 60 °C/W and 40 °C/W respectively.

Features

• 2 A DC output current
• 4.5 V to 38 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
• VFDFPN 3x3 - 10L 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
• LED driving