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ISL85014EVAL1Z Evaluation Board User Guide

Description

The 

ISL85014

 is a 3.8V to 18V input, 14A synchronous buck 

regulator for applications with input voltage from multi-cell 
batteries or regulated 5V and 12V power rails. The device also 
provides an integrated bootstrap diode for the high-side gate 
driver to reduce the external parts count. The ISL85014EVAL1Z 
platform allows quick evaluation of the high-performance 
features of the ISL85014 buck regulator.

Specifications

This board has been configured and optimized for the following 
operating conditions: 

• Input voltage ranges from 4.5V to 18V
• 1.8V nominal output voltage
• Up to 14A output current capability
• Default internally set to 600kHz switching frequency
• Default internally set to 3ms soft-start
• Operating temperature range: -40°C to +85°C 

Key Features

• Switch selectable EN (enabled/disabled)
• Frequency synchronization option
• Jumper selectable mode (DEM/Forced CCM) 
• Jumper selectable OCP mode (Hiccup/Latch-off)
• Jumper selectable frequency (600kHz/300kHz)
• Connectors and test points for easy probing
• Compact  design

Related Literature

• For a full list of related documents, visit our website

-

ISL85014

 product pages

Ordering Information

PART NUMBER

DESCRIPTION

ISL85014EVAL1Z

Evaluation board for ISL85014FRZ

FIGURE 1. BLOCK DIAGRAM

PVIN

9

FB

COMP

EN

PG

DNC

DNC

BOOT

VDD

FREQ

SYNC

1

2

3

4

5

6

10

11

12

13

14

15

MODE

VIN

C

IN

L1

C

OUT

V

OUT

GND

C

3

PVIN

GND

C

4

R

3

4.5V TO 18V

1.8V/14A

DE
M

F

CCM

LA
T

C

H

-O

F

F

HI

C

CUP

3

00k
H

z

60

0k

H

z

E

N

ABL

E

DI

S

ABL

E

PHASE

8

GND

7

R

2

R

1

C

1

February 15, 2017
UG113.0

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 2017. 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 113

Содержание ISL85014EVAL1Z

Страница 1: ...equency synchronization option Jumper selectable mode DEM Forced CCM Jumper selectable OCP mode Hiccup Latch off Jumper selectable frequency 600kHz 300kHz Connectors and test points for easy probing Compact design Related Literature For a full list of related documents visit our website ISL85014 product pages Ordering Information PART NUMBER DESCRIPTION ISL85014EVAL1Z Evaluation board for ISL85014...

Страница 2: ...he load current to 0 1A and turn on the power supply The output voltage should be in regulation with a nominal 1 8V output 7 Slowly increase the load up to 14A while monitoring the output voltage which should remain in regulation with a nominal 1 8V output 8 Slowly sweep VIN from 4 5V to 18V The output voltage should remain in regulation with a nominal 1 8V output 9 Decrease the input voltage to 0...

Страница 3: ...he input capacitors and place them as close to the IC as possible 3 Place the VDD decoupling capacitor close to the IC between VDD and GND A 1µF ceramic capacitor is typically used 4 Place a bootstrap capacitor close to the IC between the BOOT and PHASE pins A 0 1µF ceramic capacitor is typically used 5 Connect the feedback resistor divider between the output capacitor positive terminal and AGND p...

Страница 4: ...G C11 100uF J2 1 R7 20 J4 1 R5 DNP C7 1nF J11 1 2 3 R9 0 J1 1 C16 DNP J3 1 C9 22uF VOUT SYNC C14 22uF VDD C6 330uF 25V J7 1 2 C8 2 2uF R2 100k PVIN R6 100k C10 100uF SW5 SW SPDT U1 ISL85014 SYNC 1 2 MODE 3 FREQ PG 4 VDD 5 BOOT 6 7 GND 9 PVIN 8 PHASE FB 10 COMP 11 NC 12 NC1 13 EN 14 VIN 15 VIN R1 200k R4 100k R3 DNP C4 100n C13 22uF C1 DNP EN L1 0 68uH C2 DNP GND J9 1 2 3 C5 1u C3 DNP J6 1 2 J10 1 ...

Страница 5: ...HITE ROHS 5002 KEYSTONE J9 J10 J11 3 CONN HEADER 1x3 BREAKAWY 1x36 2 54mm ROHS 68001 203HLF BERG FCI L1 1 COIL PWR CHOKE SMD 10x10x9 0mm 0 68µH 20 ROHS 7443330068 WURTH ELEKTRONIK R7 1 RES SMD 0402 20Ω 1 16W 1 TF ROHS ERJ2RKF20R0 PANASONIC R9 1 RES SMD 0402 0Ω 1 16W 5 TF ROHS CR0402 16W 00T VENKEL R2 R4 R6 3 RES SMD 0402 100k 1 16W 1 TF ROHS ERJ2RKF1003 PANASONIC R10 1 RES SMD 0402 200Ω 1 16W 1 TF...

Страница 6: ...User Guide 113 UG113 0 February 15 2017 Submit Document Feedback 6 ISL85014EVAL1Z PCB Layout FIGURE 4 TOP LAYER FIGURE 5 LAYER 2 FIGURE 6 LAYER 3 FIGURE 7 BOTTOM LAYER ...

Страница 7: ...February 15 2017 Submit Document Feedback Typical Performance Curves VIN 12V VOUT 1 8V L 0 68µH fSW 600kHz TA 25 C unless otherwise noted FIGURE 8 EFFICIENCY vs LOAD FIGURE 9 START UP WITH EN IOUT 14A FIGURE 10 LOAD TRANSIENT 0A 14A 0A 2 5A µs FIGURE 11 OUTPUT VOLTAGE RIPPLE IOUT 14A 30 40 50 60 70 80 90 100 0 2 4 6 8 10 12 14 OUTPUT CURRENT A VIN 12V fsw 600kHz DEM VIN 5V fsw 600kHz DEM EFFICIENC...

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