特性 Features

? Small DC/DC Converter Size

- Three LDOs and RESET Circuitry in a Low-Profile

4x4mm QFN Package

? High Output Current

- LDO1, 1.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA

- LDO2, 2.84V. . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mA

- LDO3, 2.84V. . . . . . . . . . . . . . . . . . . . . . . . . . . . 200mA

? Ultra-Low Dropout Voltage

- LDO2, 2.84V. . . . . . . . . . . . . . . 125mV (typ.) at 300mA

- LDO3, 2.84V. . . . . . . . . . . . . . . 100mV (typ.) at 200mA

? Ultra-Low Output Voltage Noise

- <30?VRMS (typ.) for LDO3 (VCO Supply)

? Stable with Smaller Ceramic Output Capacitors

? Voltage Sequencing for BBP/MAC and Analog Supplies

? Extensive Protection and Monitoring Features

- Over current protection

- Short circuit protection

- Thermal shutdown

- Reverse battery protection

- FAULT indicator

? Logic-Controlled Dual Shutdown Pins

? Integrated Microprocessor Reset Circuit

- Programmable Reset Delay

- Complimentary Reset Outputs

? Proven Reference Design for Total WLAN System

Solution

? QFN Package Option

- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat

No Leads - Product Outline

- Near Chip-Scale Package Footprint Improves PCB

Efficiency and Is Thinner in Profile

? Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

? PRISM? 3, PRISM GT?, and PRISM WWR Chipsets

? WLAN Cards

- PCMCIA, Cardbus32, MiniPCI Cards

- Compact Flash Cards

? Hand-Held Instruments