ISL6228HIEVAL3Z Intersil, ISL6228HIEVAL3Z Datasheet

ISL6228HIEVAL3Z

Manufacturer Part Number

ISL6228HIEVAL3Z

Description

EVALUATION BOARD FOR ISL6228HI

Manufacturer

Intersil

Series

Robust Ripple Regulator™ (R³)r

Datasheets

1.ISL6228HRTZ.pdf (16 pages)

2.ISL6228HIEVAL3Z.pdf (13 pages)

Specifications of ISL6228HIEVAL3Z

Main Purpose

DC/DC, Step Down

Outputs And Type

2, Non-Isolated

Voltage - Output

1.05V or 1.2V, 1.2V

Current - Output

20A, 20A

Voltage - Input

3.3 ~ 25V

Regulator Topology

Buck

Frequency - Switching

270kHz, 300kHz

Board Type

Fully Populated

Utilized Ic / Part

ISL6228

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Current page: 1 of 16
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High-Performance Dual-Output Buck

Controller for Notebook Applications

The ISL6228 IC is a dual channel synchronous-buck PWM

controller featuring Intersil's Robust Ripple Regulator (R

technology that delivers truly superior dynamic response to

input voltage and output load transients. Integrated

MOSFET drivers and bootstrap diodes result in fewer

components and smaller implementation area.

Intersil’s R

frequency and hysteretic PWMs while eliminating many of

their shortcomings. R

modulator that synthesizes an AC ripple voltage signal V

analogous to the output inductor ripple current. The AC signal

the error amplifier output V

programmable voltage reference V

of the PWM signal. The voltage reference V

steady-state PWM frequency. Both edges of the PWM can be

modulated in response to input voltage transients and output

load transients, much faster than conventional fixed-

frequency PWM controllers. Unlike a conventional hysteretic

converter, each channel of the ISL6228 has an error amplifier

that provides ±1% voltage regulation at the FB pin.

The ISL6228 has a 1.5ms digital soft-start and can be

started into a pre-biased output voltage. A resistor divider is

used to program the output voltage setpoint. The ISL6228

operates in continuous-conduction-mode (CCM) in heavy

load, and in diode-emulation-mode (DEM) in light load to

improve light-load efficiency. In CCM, the controller always

operates as a synchronous rectifier. In DEM, the low-side

MOSFET is permitted to stay off, blocking negative current

flow into the low-side MOSFET from the output inductor.

Pinout

enters a window comparator where the lower threshold is

PGOOD1 7

FSET2

FSET1

VCC2

VCC1

VIN2

VIN1

technology combines the best features of fixed-

ISL6228 (28 LD 4x4 TQFN)

technology employs an innovative

COMP

GND

, and the upper threshold is a

Data Sheet

resulting in generation

15 PVCC1

sets the

BOOT2

PVCC2

LGATE2

PGND2

PGND1

LGATE1

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

)

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

Features

• High performance R

• Fast transient response

• ±1% regulation accuracy: -40°C to +100°C

• Individual power stage input rail for each channel

• Wide input voltage range: +3.3V to +25V

• Output voltage range: +0.6V to +5V

• Diode emulation mode for increased light load efficiency

• Programmable PWM frequency: 200kHz to 600kHz

• Pre-biased output start-up capability

• Integrated MOSFET drivers and bootstrap diode

• Internal digital soft-start

• Power good monitor

• Fault protection

• Pb-free (RoHS compliant)

Applications

• General purpose switching buck regulators

• PCI express graphical processing unit

• Auxiliary power rail

• VRM

• Network adaptor

Ordering Information

ISL6228HRTZ

ISL6228HRTZ-T* 6228HRTZ -10 to +100 28 Ld 4x4 TQFN

ISL6228IRTZ

ISL6228IRTZ-T* 6228IRTZ -40 to +100 28 Ld 4x4 TQFN

*Please refer to TB347 for details on reel specifications.

NOTE: 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. 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.

PART NUMBER

- Undervoltage protection

- Soft crowbar overvoltage protection

- Inductor DCR overcurrent protection

- Over-temperature protection

- Fault identification by PGOOD pull-down resistance

(Note)

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

May 7, 2008

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

MARKING

6228HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4A

6228IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4A

PART

technology

TEMP

(°C)

Tape and Reel

PACKAGE

(Pb-Free)

ISL6228

FN9095.2

L28.4x4A

DWG. #

PKG.

Related parts for ISL6228HIEVAL3Z

ISL6228HIEVAL3Z Summary of contents

Page 1

... Ld 4x4 TQFN L28.4x4A Tape and Reel 6228IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4A Tape and Reel Intersil (and design registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2007, 2008. All Rights Reserved PKG. DWG. # L28.4x4A ...

Page 2

Block Diagram VO2 PWM FREQUENCY FSET2 CONTROL − − R PWM − COMP + − EN2 BOOT2 POR UGATE2 DRIVER DIGITAL SOFT- START PHASE2 SHOOT THROUGH PROTECTION LGATE2 DRIVER ...

Page 3

Typical Application R R PGOOD2 PVCC2 C PVCC2 PGOOD2 V IN2 3.3V TO 25V C Q IN2 HIGH_SIDE2 0. SEN2 O2 R OCSET2 R FB2 R R TOP2 C FB2 R ...

Page 4

... Thermal Resistance (Typical, Notes 1, 2) θ TQFN Package . . . . . . . . . . . . . . . . . . Junction Temperature Range .-55°C to +150°C Operating Temperature Range . . . . . . . . . . . . . . . .-40°C to +100°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Recommended Operating Conditions , BOOT +0.3V 1,2 1,2 Ambient Temperature Range .-10°C to +100°C Supply Voltage (VIN to GND 3.3V to 25V VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ± ...

Page 5

Electrical Specifications These specifications apply for T PVCC = 5V; Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. (Continued) PARAMETER ERROR AMPLIFIER FB Input ...

Page 6

Page 7

... GND pin. Unless otherwise stated, only an individual channel is discussed, and the conclusion applies to both channels. Modulator The ISL6228 modulator features Intersil’s R hybrid of fixed frequency PWM control and variable frequency hysteretic control. Intersil’s R simultaneously affect the PWM switching frequency and ...

Page 8

C is provided by a transconductance R amplifier g that measures the VIN and VO pin voltages. m The positive slope of V can be written as Equation ⋅ ⁄ V ...

Page 9

The power for the LGATE gate-driver is sourced directly from the PVCC pin. The power for the UGATE gate- driver is sourced from a “boot” capacitor connected across the BOOT and PHASE pins. The boot capacitor is charged from ...

Page 10

The ISL6228 monitors the OCSET pin and the VO pin voltages. Once the OCSET pin voltage is higher than the VO pin voltage for more than 10µs, the ISL6228 declares an OCP fault. The value then written ...

Page 11

... It is assumed that the reader is familiar with many of the basic skills and techniques referenced in the following section. In addition to this guide, Intersil provides complete reference designs that include schematics, bills of (EQ. 10) materials, and example board layouts. ...

Page 12

RMS current and frequency. Be sure that I is shared by a sufficient quantity of paralleled P-P capacitors so that they operate below the maximum rated RMS current Take into account ...

Page 13

As an example, suppose the high-side MOSFET has a total = 5V, and a ΔV gate charge 25nC 200mV. The calculated bootstrap capacitance is 0.125µF; for a comfortable margin, select a capacitor that ...

Page 14

Typical Performance 100 12V 19V (A) OUT FIGURE 9. CHANNEL 1 EFFICIENCY FB1 ...

Page 15

... 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 ...

Page 16

Package Outline Drawing L28.4x4A 28 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 0, 3/07 4.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 3. 75 TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 16 ISL6228 A ...

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