ISL6455AIRZ-TK Intersil, ISL6455AIRZ-TK Datasheet

ISL6455AIRZ-TK

Manufacturer Part Number

ISL6455AIRZ-TK

Description

IC REG TRPL SYNCH DUAL LDO 24QFN

Manufacturer

Intersil

Datasheet

1.ISL6455IRZ-TK.pdf (12 pages)

Specifications of ISL6455AIRZ-TK

Applications

Converter, FPGAs

Voltage - Input

4.2 ~ 5.5 V

Number Of Outputs

Voltage - Output

0.8 ~ 3.3 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

ISL6455AIRZ-TKTR

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6455AIRZ-TK

Manufacturer:

Intersil

Quantity:

2 100

Current page: 1 of 12
Download datasheet (321Kb)

Triple Output Regulator with Single

Synchronous Buck and Dual LDO

The ISL6455 is a highly integrated triple output regulator

which provides a single chip solution for FPGAs and wireless

chipset power management. The device integrates a high

efficiency synchronous buck regulator (adjustable) with two

ultra low noise LDO regulators (adjustable). Either the

ISL6455 or ISL6455A can be selected based on whether

3.3V ±10% or 5V ±10% is required as an input voltage.

The synchronous current mode control PWM regulator with

integrated N- and P-channel power MOSFET provides

adjustable voltages based on external resistor setting.

Synchronous rectification with internal MOSFETs is used to

achieve higher efficiency and reduced number of external

components. Operating frequency is typically 750kHz

allowing the use of smaller inductor and capacitor values.

The device can be synchronized to an external clock signal

in the range of 500kHz to 1MHz. The PG_PWM output

indicates loss of regulation on PWM output.

The ISL6455 also has two LDO adjustable regulators using

internal PMOS transistors as pass devices. LDO2 features

ultra low noise typically below 30µV

The EN_LDO pin controls LDO1 and LDO2 outputs. The

ISL6455 also integrates a RESET function, which eliminates

the need for additional RESET IC required in WLAN and

other applications. The IC asserts a RESET signal whenever

the V

keeping it asserted for at least 25ms after V

above the reset threshold. The PG_LDO output indicates

loss of regulation on either of the two LDO outputs. Other

features include overcurrent protection and thermal

shutdown for all the three outputs.

High integration and the thin Quad Flat No-lead (QFN)

package makes ISL6455 an ideal choice for powering

FPGAs and small form factor wireless cards such as

PCMCIA, mini-PCI and Cardbus-32.

Ordering Information

Add “-TK” or T5K suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are RoHS compliant and

compatible with both SnPb and Pb-free soldering operations. Intersil

Pb-free products are MSL classified at Pb-free peak reflow

temperatures that meet or exceed the Pb-free requirements of

IPC/JEDEC J STD-020.

ISL6455IRZ

ISL6455AIRZ

PART NUMBER*

(Note)

supply voltage drops below a preset threshold,

6455IRZ

6455AIRZ

MARKING

PART

RANGE (°C)

-40 to 85

TEMP.

RMS

Data Sheet

to aid VCO stability.

24 Ld QFN L24.4x4B

PACKAGE

(Pb-Free)

has risen

DWG. #

1-888-INTERSIL or 1-888-468-3774

PKG.

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

Features

• Fully integrated synchronous buck regulator + dual LDO

• PWM output voltage adjustable.

• High output current. . . . . . . . . . . . . . . . . . . . . . . . . 600mA

• Dual LDO adjustable options

• Ultra-compact DC/DC converter design

• Stable with small ceramic output capacitors and no load

• High conversion efficiency

• Low shutdown supply current

• Low dropout voltage for LDOs

• Low output voltage noise

• PG_LDO and PG_PWM (PWM and LDO) outputs

• Extensive circuit protection and monitoring features

• Integrated RESET output for microprocessor reset

• Proven reference design for total WLAN system solution

• QFN package

• Pb-free plus anneal available (RoHS compliant)

Applications

• WLAN cards

• Hand-held instruments

Related Literature

• TB363 - Guidelines for Handling and Processing Moisture

• TB389 - PCB Land Pattern Design and Surface Mount

December 21, 2005

- 0.8V to 2.5V with ISL6455 (VIN = 3.3V)

- 0.8V to 3.3V with ISL6455A (VIN = 5.0V)

- LDO1, 1.2V to Vin-0.3V (3.3Vmax). . . . . . . . . . . 300mA

- LDO2, 1.2V to Vin-0.3V (3.3Vmax). . . . . . . . . . . 300mA

- LDO1 . . . . . . . . . . . . . . . . . . 150mV (typical) at 300mA

- LDO2 . . . . . . . . . . . . . . . . . . 150mV (typical) at 300mA

- <30µV

- PWM overvoltage protection

- Overcurrent protection

- Shutdown

- Thermal shutdown

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

- Near Chip-Scale package footprint Improves PCB

- PCMCIA, Cardbus32, MiniPCI cards

- Compact flash cards

Sensitive Surface Mount Devices (SMDs)

Guidelines for QFN Packages

No Leads - Product Outline

efficiency and is thinner in Profile

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

RMS

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

(typical) for LDO2 (VCO supply)

ISL6455, ISL6455A

FN9196.0

Related parts for ISL6455AIRZ-TK

ISL6455AIRZ-TK Summary of contents

Page 1

... MARKING RANGE (°C) ISL6455IRZ 6455IRZ - ISL6455AIRZ 6455AIRZ - Add “-TK” or T5K suffix for tape and reel. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Pinout Typical Application Schematic 3.3V R1 10k Re FB_PWM Rf PG_PWM 33nF C2 3.3V R3 PG_LDO 10k NOTE: All capacitors are ceramic. 2 ISL6455, ISL6455A ISL6455, ISL6455A (QFN) TOP VIEW SGND FB_LDO2 2 3 ...

Page 3

Functional Block Diagram 10nF CT RESET RESET 3.3V 10k POR PG_LDO CONTROL EN_LDO GND_LDO SHUTDOWN VIN VIN RTN SGND SOFT- COMPENSATION START FB_PWM EA COMPENSATION 750kHz OSCILLATOR EN POWER GOOD PWM V OUT UVLO PWM REFERENCE 0.45V SYNC EN 10k ...

Page 4

Absolute Maximum Ratings (Note 1) Supply Voltage _LDO GND -0.3V to +6.0V CC Max Continuous Output Current . . . . . . . . . ...

Page 5

Electrical Specifications Recommended operating conditions unless otherwise noted. V 5.0V for the ISL6455A, Compensation Capacitors = 33nF for LDO1 and LDO2. T values are at T PARAMETER Efficiency Soft-Start Time OSCILLATOR Oscillator Frequency Frequency Synchronization Range (f SYNC SYNC High ...

Page 6

Electrical Specifications Recommended operating conditions unless otherwise noted. V 5.0V for the ISL6455A, Compensation Capacitors = 33nF for LDO1 and LDO2. T values are at T PARAMETER ENABLE (EN and (EN_LDO) EN High Level Input Voltage EN Low Level Input ...

Page 7

PG_LDO Timing Diagram UVLO V PG VFB_LDO PG_LDO THRESHOLD VOLTAGE PG_LDO OUTPUT OUTPUT UNDEFINED NOTE the minimum input voltage for a valid PG_LDO ISL6455, ISL6455A V UVLO RISING MAX ...

Page 8

Pin Descriptions PVCC - Positive supply for the power (internal FET) stage of the PWM section. SGND - Analog ground for the PWM. All internal control circuits are referenced to this pin The PWM controller is enabled when ...

Page 9

The error amplifier sets the threshold for the PWM comparator. The high side switch is turned off when the sensed inductor current reaches this threshold. After a minimum dead time preventing shoot through current, the ...

Page 10

Integrator Circuitry Both ISL6455 LDO Regulators use external 33nF compensation capacitors for minimizing load and line regulation errors and for lowering output noise. When the output voltage shifts due to varying load current or input voltage, the integrator capacitor voltage ...

Page 11

The DC resistance of the inductor will influence directly the efficiency of the converter. Therefore, an inductor with lowest DC resistance should be selected for highest efficiency. In order to avoid saturation of the inductor, the inductor should ...

Page 12

... 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. 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 ...

Related keywords

isl6455
isl6423
isl6421
isl6405
isl6455a
isl6455airz-tk
ISL6455AIRZ-TK datasheet
ISL6455AIRZ-TK data sheet
ISL6455AIRZ-TK pdf datasheet
ISL6455AIRZ-TK component
ISL6455AIRZ-TK part
ISL6455AIRZ-TK distributor
ISL6455AIRZ-TK RoHS
ISL6455AIRZ-TK datasheet download