L7986A

L7986 3 A step-down switching regulator Datasheet - production data Applications • Consumer: STB, DVD, DVD recorder, car audio, LCD TV and monitors • Industrial: PLD, PLA, FPGA, chargers • Networking: XDSL, modems, DC-DC modules HSOP8 exp. pad VFDFPN10 3 x 3 mm • Computer: optical storage, hard disk drive, printers, audio/graphic cards Features • LED driving • 3 A DC output current Description • 4.5 V to 38 V input voltage The L7986/A is a step-down switching regulator with a 3.7 A (minimum) current limited embedded power MOSFET, so it is 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 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 reducing the RthJA down to 60 °C/W and 40 °C/W respectively. • 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 3 x 3 - 10L and HSOP8 package Figure 1. Application circuit 9LQ 9  9 9&& *1' )6: )% &     /     / 287 9287 IURP 9 WR 9LQ 6