June 2009Doc ID 13004 Rev 61/3737 L59811 A step-d
Description1.5 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 VIN2.9 V, the device is suitable also for 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 package with exposed pad allows reducing the RthJA60 C/W. VFQFPN8 3 mm x 3 mmFigure 1.Application circuit www.st.com ContentsL59812/37 Doc ID 13004 Rev 6Contents1Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.1Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.2Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Max Features 1 A DC output current2.9 V to 18 V input voltageOutput voltage adjustable from 0.6 V250 kHz switching frequency, programmable up to 1 MHzLow dropout operation: 100 % duty cycleVoltage feed-forwardZero load current operationOvercurrent and thermal protectionVFQFPN8 3 mm x 3 mm packageApplications audio, LCD TV and monitorsIndustrial: chargers, PLD, PLA, FPGANetworking: XDSL, modems, DC-DC modulesComputer: optical storage, hard disk drive, printers, audio/graphic cardsLED drivingDescription1.5 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 VIN2.9 V, the device is suitable also for 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 package Specification refered to TJ from -40 to +125 C
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L59811, VFQFPN8, V1AIO, L5981, VCOMP1, TIME3264, Io/2.In, V3VV, RthJA60, DC-DC, V250, R1R2, 39L5981Pin, V20mAIO
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