ISL6411IR Intersil Corporation, ISL6411IR Datasheet

ISL6411IR

Manufacturer Part Number

ISL6411IR

Description

Manufacturer

Intersil Corporation

Datasheet

1.ISL6411IR.pdf (4 pages)

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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.

The ISL6411 uses an internal PMOS transistor as the pass

device. The SHDN pin controls LDO1 and LDO2 outputs

whereas SHDN3 controls LDO3 output. Internal voltage

sequencing insures that LDO1 output (1.8V supply) is

always stabilized before LDO2 is turned on. When powering

down, power to the LDO2 is removed before the LDO1

output goes off. The ISL6411 also integrates RESET

function, which eliminates the need for additional RESET IC

required in WLAN applications. The IC asserts a RESET

signal whenever the VIN supply voltage drops below a

preset threshold, keeping it asserted for at least 25ms after

Vin has risen above the reset threshold. An output fault

detection circuit indicates loss of regulation on any of the

three outputs. Other features include an over current

protection, thermal shutdown and reverse battery protection.

Ordering Information

NOTE: " Z " Suffix: Intersil Lead Free products employ special lead

free material sets; molding compounds/die attach materials and

100% matte tin plate termination finish, which is compatible with both

SnPb and lead free soldering operations. Intersil Lead Free products

are MSL classified at lead free peak reflow temperatures that meet

or exceed the lead free requirements of IPC/JEDEC J Std-020B.

Tape and Reel available. Add “-T” suffix for tape and reel packing

option (e.g., ISL6411RZ-T for lead free tape and reel).

ISL6411IR

ISL6411IRZ (Note)

PART NUMBER

TEMP. RANGE

-40 to +85

(

16 Ld QFN

Data Sheet

PACKAGE

L16.4x4

DWG. #

PKG.

1-888-INTERSIL or 321-724-7143

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Features

• Small DC-DC Converter Size

• High Output Current

• Ultra-Low Dropout Voltage

• Ultra-Low Output Voltage Noise

• Stable with Smaller Ceramic Output Capacitors

• Voltage Sequencing for BBP/MAC and Analog Supplies

• Extensive Protection and Monitoring Features

• Logic-Controlled Dual Shutdown Pins

• Integrated Microprocessor Reset Circuit

• Proven Reference Design for Total WLAN System

• QFN Package Option

Applications

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

• WLAN Cards

• Hand-Held Instruments

- Three LDOs and RESET Circuitry in a Low-Profile

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

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

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

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

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

- <302V

- Over current protection

- Short circuit protection

- Thermal shutdown

- Reverse battery protection

- FAULT indicator

- Programmable Reset Delay

- Complimentary Reset Outputs

Solution

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

- Near Chip-Scale Package Footprint Improves PCB

- Lead-Free Package Option Available ("Z" suffix)

- PCMCIA, Cardbus32, MiniPCI Cards

- Compact Flash Cards

No Leads - Product Outline

Efficiency and Is Thinner in Profile

4x4mm QFN Package

November 2003

All other trademarks mentioned are the property of their respective owners.

RMS

Intersil (and design) is a registered trademark of Intersil Americas Inc.

(typ.) for LDO3 (VCO Supply)

ISL6411

FN9081.2

Related parts for ISL6411IR

ISL6411IR Summary of contents

Page 1

... C) PACKAGE ISL6411IR - QFN ISL6411IRZ (Note) - QFN NOTE: " Z " Suffix: Intersil Lead Free products employ special lead free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is compatible with both SnPb and lead free soldering operations. Intersil Lead Free products are MSL classified at lead free peak reflow temperatures that meet or exceed the lead free requirements of IPC/JEDEC J Std-020B ...

Page 2

Pinout Typical Application Schematic +3. 3.32F C7 0.012F +2.84V V OUT3 C5 3.32F 2 ISL6411 ISL6411 (QFN) TOP VIEW RESET SHDN 3 10 SHDN3 ...

Page 3

Functional Block Diagram VIN 15 FAULT VIN 3 SHDN 4 SHDN3 RESET 1 RESET 8 GND 3 ISL6411 Gm BAND GAP WINDOW REF. COMP 1.2V Gm THERMAL SHUT DOWN o 150 C WINDOW COMP Gm CONTROL LOGIC ...

Page 4

... Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. ...

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