ISL8022EVAL1Z Intersil, ISL8022EVAL1Z Datasheet

ISL8022EVAL1Z

Manufacturer Part Number

ISL8022EVAL1Z

Description

EVAL BOARD 1 FOR ISL8022

Manufacturer

Intersil

Datasheets

1.ISL8022IRZ.pdf (18 pages)

2.ISL8022EVAL1Z.pdf (6 pages)

Specifications of ISL8022EVAL1Z

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 18
Download datasheet (2Mb)

Dual 2A/1.7A Low Quiescent Current 2.25MHz

High Efficiency Synchronous Buck Regulator

ISL8022

The ISL8022 is a high efficiency, dual synchronous

step-down DC/DC regulator that can deliver up to

2A/1.7A continuous output current per channel. The

channels are 180° out-of-phase for input RMS current

and EMI reduction.The supply voltage range of 2.8V to

5.5V allows the use of a single Li+ cell, three NiMH cells

or a regulated 5V input. The current mode control

architecture enables very low duty cycle operation at

high frequency with fast transient response and excellent

loop stability. The ISL8022 operates at 2.25MHz

switching frequency allowing the use of small, low cost

inductors and capacitors. Each channel is optimized for

generating an output voltage as low as 0.6V.

The ISL8022 has a user configurable mode of

operation-forced PWM mode and PFM/PWM mode. The

forced PWM mode operation reduces noise and RF

interference while the PFM mode operation provides high

efficiency by reducing switching losses at light loads. In

PFM mode of operation, both channels draw a total

quiescent current of only 40µA hence enabling high light

load efficiency in order to maximize battery life.

The ISL8022 offers a 1ms Power-Good (PG) to monitor

both outputs at power-up. When shutdown, ISL8022

discharges the outputs capacitor. Other features include

internal digital soft-start, enable for power sequence,

overcurrent protection, and thermal shutdown. The

ISL8022 is offered in a 4mmx3mm 12 Ld DFN package

with 1mm maximum height. The complete converter

occupies less than 1.8cm

Characteristics Curve

August 25, 2010

FN7650.1

area.

100

0.0

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

3.3V

0.2

2.5V

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

OUT2 PWM

OUT1PWM

0.4

0.6

OUTPUT LOAD (A)

0.8

2.5V

Features

• Dual 2A/1.7A High Efficiency Synchronous Buck

• 180° Out-of-Phase

• Start-up with Pre-biased Output

• Selectable Forced PWM Mode and PFM Mode

• External Synchronization up to 8MHz

• Negative Current Detection and Protection

• 100% Maximum Duty Cycle for Lowest Dropout

• Internal Current Mode Compensation

• Peak Current Limiting, Hiccup Mode Short Circuit

• Pb-Free (RoHs Compliant)

Applications*

• DC/DC POL Modules

• µC/µP, FPGA and DSP Power

• Plug-in DC/DC Modules for Routers and Switchers

• Test and Measurement Systems

• Li-ion Battery Powered Devices

• Bar Code Readers

Related Literature*

•

1.0

OUT1PFM

2.25MHz 5V

Regulator with up to 97% Efficiency, Low iq (40µA)

Protection and Over-Temperature Protection

AN1554

Quiescent Current 2.25MHz High Efficiency

Synchronous Buck Regulator”

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

1.2

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

1.4

“ISL8022EVAL1Z Dual 2A/1.7A Low

3.3V

1.6

AT +25°C

OUT2PFM

1.8

2.0

(see page 17)

Related parts for ISL8022EVAL1Z

ISL8022EVAL1Z Summary of contents

Page 1

... Plug-in DC/DC Modules for Routers and Switchers • Test and Measurement Systems • Li-ion Battery Powered Devices • Bar Code Readers Related Literature* • AN1554 “ISL8022EVAL1Z Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator” 2.5V OUT1PFM 2.5V OUT1PWM 3 ...

Page 2

Typical Applications µ F FIGURE 1. TYPICAL APPLICATION DIAGRAM - DUAL INDEPENDENT OUTPUTS V 0.8V OUT C1 2x10µF C2 (or C4) 22µF ...

Page 3

Block Diagram ...

Page 4

... MARKING (°C) ISL8022IRZ 8022 - 4x3 ISL8022EVAL1Z Evaluation Board NOTES: 1. Add “T” suffix for Tape and Reel. Please refer to details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations) ...

Page 5

... Thermal Information Reference to GND) Thermal Resistance (Typical) + 0.3V 4x3 DFN Package (Notes Junction Temperature Range . . . . . . . . . . -55°C to +150°C Storage Temperature Range . . . . . . . . . . . -65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = -40°C to +85° +25° SYMBOL TEST CONDITIONS V Rising UVLO ...

Page 6

Electrical Specifications Unless otherwise noted, all parameter limits are established over the recommended operating conditions: T SYNC = 0V 1.2µ 10µ 22µF, I 1.7A. (Typical values are at T operating ...

Page 7

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. OUT2 100 90 80 1.8V OUT2 1.5V 2.5V 70 OUT2 OUT1 0.0 0.2 0.4 0.6 0.8 ...

Page 8

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. (Continued) OUT2 1.54 5V PFM 1.53 IN 1.52 5V PWM 1.51 IN 1.50 1.49 3.3V V PWM IN 1.48 ...

Page 9

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. (Continued) OUT2 LX1 2V/DIV V RIPPLE 20mV/DIV OUT1 IL1 0.2A/DIV FIGURE 13. STEADY STATE OPERATION AT NO LOAD CHANNEL ...

Page 10

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. (Continued) OUT2 V RIPPLE 50mV/DIV OUT1 PG 5V/DIV IL1 1A/DIV FIGURE 19. LOAD TRANSIENT CHANNEL 1 (PWM) LX1 2V/DIV ...

Page 11

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. (Continued) OUT2 EN1 2V/DIV V 1V/DIV OUT1 IL1 0.5A/DIV PG 5V/DIV FIGURE 25. SOFT-START AT NO LOAD CHANNEL 1 ...

Page 12

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. (Continued) OUT2 LX1 2V/DIV V RIPPLE 20mV/DIV OUT1 IL1 0.2A/DIV SYNCH 2V/DIV FIGURE 31. STEADY STATE OPERATION AT NO ...

Page 13

Typical Operating Performance T = +25° 2.8V to 5.5V VIN 1.7A. (Continued) OUT2 PG 1V/DIV IL2 0.5A/DIV FIGURE 37. VOUT2 HARD SHORT TO VIN NEGATIVE CURRENT WAVEFORMS AT HIGH LINE ...

Page 14

Theory of Operation The ISL8022 is a dual 2A/1.7A step-down switching regulator optimized for battery-powered or mobile applications. The regulator operates at 2.25MHz fixed switching frequency under heavy load condition to allow small external inductor and capacitors to be used ...

Page 15

PWM CLOCK 16 CYCLES NOMINAL +1.5% V OUT FIGURE 44. SKIP MODE OPERATION WAVEFORMS Positive and Negative Overcurrent Protection CSA1 and CSA2 are used to monitor output 1 and output 2 channels respectively. The overcurrent protection is ...

Page 16

Duty Cycle The ISL8022 features 100% duty cycle operation to maximize the battery life. When the battery voltage drops to a level that the ISL8022 can no longer maintain the regulation at the output, the regulator completely turns on ...

Page 17

... 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...

Page 18

Package Outline Drawing L12.4x3 12 LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 7/10 4.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 3.30 2. 10X TYPICAL RECOMMENDED LAND PATTERN ...

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