ISL6411IR

三路输出，低噪声LDO调节器，内置复位电路 Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit

The ISL6411 is an ultra low noise triple output LDO regulator with microprocessor reset circuit and is optimized for powering wireless chip sets. The IC accepts an input voltage range of 3.0V to 3.6V and provides three regulated output voltages: 1.8V LDO1, 2.84V LDO2, and another ultra clean 2.84V LDO3. On chip logic provides sequencing between LDO1 and LDO2 for BBP/MAC and I/O supply voltage outputs. LDO3 features ultra low noise that does not typically exceed 30µV RMS to aid VCO stability. High integration and the thin Quad Flat No-lead QFN package makes ISL6411 an ideal choice to power many of today’s small form factor industry standard wireless cards, such as PCMCIA, mini-PCI and Cardbus-32.

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

\- <30µVRMS 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

\- Lead-Free Package Option Available "Z" suffix

Applications

• PRISM® 3, PRISM GT™, and PRISM WWR Chipsets

• WLAN Cards

\- PCMCIA, Cardbus32, MiniPCI Cards

\- Compact Flash Cards

• Hand-Held Instruments