ISL6412 Intersil Corporation, ISL6412 Datasheet

ISL6412

Manufacturer Part Number

ISL6412

Description

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

Manufacturer

Intersil Corporation

Datasheet

1.ISL6412.pdf (4 pages)

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Triple Output, Low-Noise LDO Regulator

with Integrated Reset Circuit

The ISL6412 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), 2.8V (LDO2), and another ultra-

clean 2.8V (LDO3). On chip logic provides sequencing

between LDO1 and LDO2 for the BBP/MAC and the 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 the ISL6412 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 ISL6412 uses an internal PMOS transistor as the pass

device. The ISL6412 also integrates a reset function, which

eliminates the need for the 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. FAULT1 indicates the loss

of regulation on LDO1.

Ordering Information

NOTES:

ISL6412IR

ISL6412IRZ

1. “Z” Suffix: These products are packaged in 16 ld QFN packages

2. Tape and Reel available. Add “-T” suffix for Tape and Reel

PART NUMBER

that are MSL level 1 at 255-260

which exceeds the IPC J Std-020B requirements for MSL level

1. The lead free and green products employ special lead free

material sets including 100% matte tin plate termination finish,

which is compatible with either Sn/Pb or lead free soldering

operations.

Packing Option.

TEMP. RANGE

-40 to +85

(

C peak reflow temperature,

16 Ld 4x4 QFN L16.4x4

Data Sheet

PACKAGE

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

• Extensive Protection and Monitoring Features

• Logic-Controlled Shutdown Pin

• Integrated Microprocessor Reset Circuit

• Proven Reference Design for a Total WLAN System

• QFN Package

• Lead (Pb) - Free Packaging

Applications

• PRISM® 3 Chipsets – ISL37106P

• WLAN Cards

• Liberty Chipset

• Hand-Held Instruments

- Three LDOs and Reset Circuitry in a Low-Profile

- LDO1, 1.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330mA

- LDO2, 2.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225mA

- LDO3, 2.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125mA

- LDO2, 2.8V. . . . . . . . . . . . . . . . 125mV (typ.) at 225mA

- LDO3, 2.8V. . . . . . . . . . . . . . . . 100mV (typ.) at 125mA

- <30µV

- Over current protection

- Short circuit protection

- Thermal shutdown

- FAULT indicator

- Programmable Reset Delay

Solution

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

- Near Chip-Scale Package Footprint Improves PCB

- 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.

January 2004

RMS

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

(typ.) for LDO3 (VCO Supply)

ISL6412

FN9067

Related parts for ISL6412

ISL6412 Summary of contents

Page 1

... Data Sheet Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit The ISL6412 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

... Pinouts Typical Application Schematic +3. 3.3µF C7 0.01µF +2.8V V OUT3 C5 3.3µF 2 ISL6412 ISL6412 (QFN) TOP VIEW RESET SHDN RESET OUT1 CC1 ISL6412 10 3 SHDN OUT2 9 4 CC2 NC C4 0.033µF C6 0.033µF 12 OUT1 CC1 11 OUT2 ...

Page 3

... Functional Block Diagram Vin 15 FAULT1 Vin 3 SHDN RESET 8 GND 3 ISL6412 GM BAND GAP WINDOW REF. COMP 1.2V GM THERMAL SHUT DOWN o 150 C GM CONTROL LOGIC ENABLES RESET VIN 13 14 VIN + - 12 OUT1 LDO1 CC1 OUT2 LDO2 CC2 OUT3 5 LDO3 CC3 6 7 GND3 ...

Page 4

... Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP) 10 ISL6412 L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE C) MILLIMETERS SYMBOL MIN NOMINAL A 0. 0.23 D 4.00 BSC D1 3.75 BSC D2 1.95 E 4.00 BSC E1 3.75 BSC E2 1. 0. θ ...

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