ISL6414 Intersil Corporation, ISL6414 Datasheet

ISL6414

Manufacturer Part Number

ISL6414

Description

Triple Output/ Low-Noise LDO Regulator with Integrated Reset Circuit

Manufacturer

Intersil Corporation

Datasheet

1.ISL6414.pdf (4 pages)

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Triple Output, Low-Noise LDO Regulator

with Integrated Reset Circuit

The ISL6414 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 ISL6414 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 ISL6414 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 ISL6414 also integrates RESET

function, which eliminates the need for additional RESET IC

required in WLAN applications. The IC asserts a RESET

signal whenever the V

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

risen above the reset threshold. An output fault detection

circuit indicates loss of regulation on LDO1. 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. (eg. ISL6414IRZ-T for lead free tape and reel)

ISL6414IR

ISL6414IRZ

PART NUMBER

TEMP. RANGE

-40 to +85

supply voltage drops below a preset

(

16 Ld QFN

Data Sheet

PACKAGE

L16.4x4

DWG. #

PKG.

1-888-INTERSIL or 321-724-7143

has

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

- <30µV

- Over current and 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 Option Available (“Z” suffix)

- PCMCIA, Cardbus32, MiniPCI Cards

- Compact Flash Cards

4x4mm QFN Package

No Leads - Product Outline

Efficiency and Is Thinner in Profile

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

October 2003

RMS

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

(typ.) for LDO3 (VCO Supply)

ISL6414

FN9128

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ISL6414 Summary of contents

Page 1

... Data Sheet Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit The ISL6414 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 ...

Page 2

... Pinout ISL6414 (QFN) TOP VIEW RESET SHDN 3 SHDN3 Typical Application Schematic +3. 3.3µF C7 0.01µF +2.84V V OUT3 C5 3.3µF 2 ISL6414 OUT1 12 CC1 11 OUT2 10 CC2 RESET OUT1 CC1 ISL6414 10 3 SHDN OUT2 9 4 SHDN3 CC2 C4 0.033µF ...

Page 3

... Functional Block Diagram VIN 15 FAULT VIN 3 SHDN 4 SHDN3 RESET 1 RESET 8 GND 3 ISL6414 Gm BAND GAP WINDOW REF. COMP 1.2V Gm THERMAL SHUT DOWN o 150 C Gm CONTROL LOGIC ENABLES RESET POR POR VIN 13 14 VIN + - 12 OUT1 LDO1 CC1 OUT2 LDO2 CC2 OUT3 5 LDO3 ...

Page 4

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 4 ISL6414 L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE C) ...

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