ISL78235EVAL2Z

ISL78235EVAL2Z Datasheet

ISL7823xEVAL2Z Evaluation Board User Guide

Part	Datasheet
ISL78235EVAL2Z	ISL78235EVAL2Z (pdf)

Related Parts	Information
ISL78233EVAL2Z	ISL78233EVAL2Z
ISL78234EVAL2Z	ISL78234EVAL2Z

PDF Datasheet Preview
User Guide UG062 ISL7823xEVAL2Z Evaluation Board User Guide The ISL78233EVAL2Z, ISL78234EVAL2Z and ISL78235EVAL2Z evaluation boards are used to demonstrate the performance of the ISL78233, ISL78234 and ISL78235 low quiescent current, high efficiency synchronous buck regulators. The evaluation boards are intended for use by customers with requirements for point-of-load automotive applications with 2.7V to 5.5V input supply voltage, output voltages down to 0.8V and up to a 5A output current. The ISL78233, ISL78234 and ISL78235 are offered in a 5x5mm 16 Ld Wettable Flank QFN WFQFN package with 0.9mm maximum height. Specifications PART IOUT MAX NUMBER A fSW RANGE MHz VOUT RANGE PART SIZE ISL78235 5 ISL78234 Programmable to 1MHz to 4MHz ISL78233 4 PCB SPECIFICATION Board Dimension 2.025inx2.725in # of Layers 4 FR-4 Thickness 1.57mm Copper Weight 2oz. NOTES The evaluation board default VOUT = 1.8V. The evaluation board default fSW = 2MHz. Key Features • 2.7V to 5.5V input voltage range • Synchronous buck regulator up to 95% efficiency • 1% reference accuracy over temperature • Resistor adjustable frequency from 500kHz to 4MHz; Default set to 2MHz • External synchronization from 1MHz to 4MHz • 100ns maximum phase minimum on time allows wide output regulation operating at 2MHz • Internal soft-start set to 1ms adjustable with external soft-start capacitor • Over-temperature, overcurrent, overvoltage and negative overcurrent protection References • ISL78235 Datasheet • ISL78233, ISL78234 Datasheet Ordering Information ISL78235EVAL2Z Evaluation Board for 5A Synchronous Buck ISL78235 ISL78234EVAL2Z Evaluation Board for 4A Synchronous Buck ISL78234 ISL78233EVAL2Z Evaluation Board for 3A Synchronous Buck ISL78233 December 9, 2015 UG06.0 2.7V TO 5.5V CIN 16 15 14 VIN 1 VDD 2 PG 3 ISL78235 SYNC 4 VIN PHASE COUT 13 PGND 12 PGND 11 10 SGND 9 FB 8 VOUT 5A LOAD DSP, FPGA Pin Compatible ISL78233 - 3A BUCK ISL78234 - 4A BUCK EN FS SS COMP FIGURE ISL7823xEVAL2Z BLOCK DIAGRAM CAUTION These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 \| Copyright Intersil Americas LLC All Rights Reserved Intersil and design is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. User Guide UG062 Recommended Equipment The following equipment is recommended to perform testing • 0V to 5V power supply with 10A source current capability • Electronic load capable of sinking current up to 10A • Digital Multimeters DMMs • 500MHz quad-trace oscilloscope • Signal generator for EN and/or SYNC pins Quick Setup Guide Ensure that the circuit is correctly connected to the supply and loads prior to applying any power. Connect the bias supply to VIN, the plus terminal to VIN P4 and the negative return to PGND P5 . Connect the output load to VOUT, the plus terminal to VOUT P3 and the negative return to PGND P7 . Verify that SW2 is in the proper position for PFM or PWM. Verify that the position is ON for SW1. Turn on the power supply and set for 2.7V to 5.0V. Verify the output voltage is 1.8V for VOUT. Functional Description The ISL78233EVAL2Z, ISL78234EVAL2Z and ISL78235EVAL2Z evaluation boards are used to demonstrate the performance of the ISL78233, ISL78234 and ISL78235 low quiescent current, high efficiency synchronous buck regulators. The evaluation boards are intended for use by customers with requirements for point-of-load automotive applications with 2.7V to 5.5V input supply voltage, output voltages down to 0.8V and up to a 5A output current. The ISL78233, ISL78234 and ISL78235 are offered in a 5x5mm 16 Ld Wettable Flank QFN WFQFN package with 0.9mm maximum height. The schematics for the evaluation boards are shown in Figure 4 on page The evaluation boards include all components to easily evaluate the performance of the buck regulator. Hardware included on the evaluation boards allows the user to operate the following functions Toggle switch for Enable/Disable, Toggle switch for PFM/forced PWM operation and test points for monitoring the switching node and output voltage. Operating Voltage Range The ISL78233EVAL2Z, ISL78234EVAL2Z and ISL78235EVAL2Z evaluation boards are designed to operate with 2.7V to 5.5V VIN and the outputs are preset to 1.8V for VOUT. The output voltage can be adjusted from 0.8V to 3.3V. The output voltage programming

PDF Datasheet Preview

User Guide UG062

ISL7823xEVAL2Z Evaluation Board User Guide

The ISL78233EVAL2Z, ISL78234EVAL2Z and ISL78235EVAL2Z evaluation boards are used to demonstrate the performance of the ISL78233, ISL78234 and ISL78235 low quiescent current, high efficiency synchronous buck regulators. The evaluation boards are intended for use by customers with requirements for point-of-load automotive applications with 2.7V to 5.5V input supply voltage, output voltages down to 0.8V and up to a 5A output current.

The ISL78233, ISL78234 and ISL78235 are offered in a 5x5mm 16 Ld Wettable Flank QFN WFQFN package with 0.9mm maximum height.

Specifications

PART

IOUT MAX

NUMBER A
fSW RANGE MHz

VOUT

RANGE PART SIZE

ISL78235 5

ISL78234

Programmable to 1MHz to 4MHz

ISL78233 4

PCB SPECIFICATION Board Dimension 2.025inx2.725in # of Layers 4 FR-4 Thickness 1.57mm Copper Weight 2oz.

NOTES The evaluation board default VOUT = 1.8V. The evaluation board default fSW = 2MHz.

Key Features
• 2.7V to 5.5V input voltage range
• Synchronous buck regulator up to 95% efficiency
• 1% reference accuracy over temperature
• Resistor adjustable frequency from 500kHz to 4MHz;

Default set to 2MHz
• External synchronization from 1MHz to 4MHz
• 100ns maximum phase minimum on time allows wide
output regulation operating at 2MHz
• Internal soft-start set to 1ms adjustable with external
soft-start capacitor
• Over-temperature, overcurrent, overvoltage and negative
overcurrent protection

References
• ISL78235 Datasheet
• ISL78233, ISL78234 Datasheet
Ordering Information

ISL78235EVAL2Z Evaluation Board for 5A Synchronous Buck ISL78235

ISL78234EVAL2Z Evaluation Board for 4A Synchronous Buck ISL78234

ISL78233EVAL2Z Evaluation Board for 3A Synchronous Buck ISL78233

December 9, 2015 UG06.0
2.7V TO 5.5V

CIN 16 15 14

VIN 1

VDD 2 PG 3
*ISL78235

SYNC 4

VIN PHASE

COUT
13 PGND
12 PGND
11 10 SGND 9 FB 8

VOUT 5A LOAD DSP, FPGA
*Pin Compatible ISL78233 - 3A BUCK ISL78234 - 4A BUCK

EN FS SS COMP

FIGURE ISL7823xEVAL2Z BLOCK DIAGRAM

CAUTION These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC All Rights Reserved

Intersil and design is a trademark owned by Intersil Corporation or one of its subsidiaries.

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

User Guide UG062

Recommended Equipment

The following equipment is recommended to perform testing
• 0V to 5V power supply with 10A source current capability
• Electronic load capable of sinking current up to 10A
• Digital Multimeters DMMs
• 500MHz quad-trace oscilloscope
• Signal generator for EN and/or SYNC pins

Quick Setup Guide

Ensure that the circuit is correctly connected to the supply and loads prior to applying any power.

Connect the bias supply to VIN, the plus terminal to VIN P4 and the negative return to PGND P5 .

Connect the output load to VOUT, the plus terminal to VOUT P3 and the negative return to PGND P7 .

Verify that SW2 is in the proper position for PFM or PWM.

Verify that the position is ON for SW1.

Turn on the power supply and set for 2.7V to 5.0V.

Verify the output voltage is 1.8V for VOUT.

Functional Description

The ISL78233EVAL2Z, ISL78234EVAL2Z and ISL78235EVAL2Z evaluation boards are used to demonstrate the performance of the ISL78233, ISL78234 and ISL78235 low quiescent current, high efficiency synchronous buck regulators. The evaluation boards are intended for use by customers with requirements for point-of-load automotive applications with 2.7V to 5.5V input supply voltage, output voltages down to 0.8V and up to a 5A output current. The ISL78233, ISL78234 and ISL78235 are offered in a 5x5mm 16 Ld Wettable Flank QFN WFQFN package with 0.9mm maximum height.

The schematics for the evaluation boards are shown in Figure 4 on page The evaluation boards include all components to easily evaluate the performance of the buck regulator. Hardware included on the evaluation boards allows the user to operate the following functions Toggle switch for Enable/Disable, Toggle switch for PFM/forced PWM operation and test points for monitoring the switching node and output voltage.

Operating Voltage Range

The ISL78233EVAL2Z, ISL78234EVAL2Z and ISL78235EVAL2Z
evaluation boards are designed to operate with 2.7V to 5.5V VIN and the outputs are preset to 1.8V for VOUT. The output voltage can be adjusted from 0.8V to 3.3V. The output voltage programming

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ISL78235EVAL2Z Datasheet file may be downloaded here without warranties.

Datasheet ID: ISL78235EVAL2Z 639200