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Features

? Fully Integrated Synchronous Buck Regulator + Dual LDO

? High Output Current (For QFN package)

- PWM, 1.2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mA

- LDO1, 1.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mA

- LDO2, 1.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200mA

? Ultra-Compact DC-DC Converter Design

? Stable with Small Ceramic Output Capacitors

? High Conversion Efficiency

? Low Shutdown Supply Current

? Ultra-Low Dropout Voltage for LDOs

- LDO1, 1.8V. . . . . . . . . . . . . . . . 125mV (typ.) at 300mA

- LDO2, 1.8V. . . . . . . . . . . . . . . . 100mV (typ.) at 200mA

? Ultra-Low Output Voltage Noise

- <30?VRMS (typ.) for LDO2 (VCO Supply)

? PG_LDO, PG_PWM and PG_PWM outputs

? Extensive Circuit Protection and Monitoring Features

- Overvoltage protection

- Overcurrent protection

- Shutdown

- Thermal Shutdown

? Integrated RESET output for microprocessor reset

? Proven Reference Design for Total WLAN System

Solution

? QFN Package

- 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 Available (RoHS Compliant)