EN5319QI 1.5A Synchronous DC/DC Converter Evaluation Board User Guide Enpirion

Enpirion ® Power Evaluation Board User Guide

EN5319QI PowerSoC

EN5319QI 1.5A Synchronous DC/DC Converter

Evaluation Board User Guide

Introduction

Thank you for choosing Altera Enpirion power products!

This evaluation board user guide applies to the EN5319 devices mounted on PCB’s with the part number 08251 rev A on the backside. This user guide should be used together with the latest device datasheet. The datasheet can be found at www.altera.com/enpirion .

Following are the features of this evaluation board.

• Populated with one EN5319QI 1.5A PowerSoC with integrated inductor.

• Pre-tinned pads are available for a wide range of input and output capacitor configurations.

• There are four positions available for the output capacitors. The first position, closest to the IC, can accommodate a 1206, 0805, or 0603 case size while the other three positions can accommodate either 0805 or 0603 capacitor case sizes.

• The base output capacitor configuration is 2 x 22uF 0603 MLCC. Refer to the product datasheet for output capacitor requirements.

• There are two positions for the input capacitors. The first position, closest to the

IC, can accommodate an 0805 or 0603 case size while the other position can accommodate an 0805 case size. The base input capacitor configuration is a single 10uF 0805 MLCC. Refer to the product datasheet for input capacitor requirements.

• Output voltage programming is accomplished via a simple resistor divider.

Jumpers are provided for 4 pre-configured output settings. These settings are as follows:

• 1.0V, 1.2V, 1.5V, 1.8V

• Easy jumpers are provided for the following signals:

• Enable

• Numerous test points are provided as well as clip leads for input and output connections

• The board comes with input decoupling and reverse polarity protection.

Page 1 of 6 www.altera.com/enpirion

Enpirion ® Power Evaluation Board User Guide

EN5319QI PowerSoC

Quick Start Guide

Figure 1 shows a photograph of the evaluation board. Please refer to this figure while configuring the board for evaluation.

STEP 1: Set the “ENABLE” jumper to the Disable Position.

ENABLE DISABLE

STEP 2: Select the desired VOUT voltage setting by placing the jumper J2 on the correct jumper pin. Figure below shows the VOUT jumper options and their nominal voltages. Note that depending on the tolerance of the resistors populated on the board, each output voltage setting may have a larger tolerance than just the VFB pin as specified in the datasheet. Please see

Figure 3 and the Bill of Materials section. Multiple jumpers can be populated to get other output voltages not listed below. With the resistors shown below, if all

4 jumper positions are populated, the output voltage will be approximately

3.7V. Note that for any VOUT higher than 3.3V, the output capacitors need to be changed to 2 x 22uF/0805.

CAUTION: the VOUT jumper settings can only be changed when the device is off. Failure to follow this guideline may result in damage to the part.

Please note: The loop compensation circuit for this evaluation board has been chosen for a wide range of VIN and V

OUT

values. In order to optimize the loop for any specific VIN/V

OUT

operating point, please see the compensation table in the datasheet. See Figures 1 and 3.

STEP 3: Connect a Power Supply to the input power connectors, VIN (J4) and GND

(J5). DO NOT turn the power supply on yet.

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Enpirion ® Power Evaluation Board User Guide

EN5319QI PowerSoC

CAUTION: Be mindful of the input voltage magnitude and polarity. Even though the evaluation board comes with reverse polarity protection diodes, it may not protect the device under all conditions.

STEP 4: Connect an electronic load, or load board to the load to the output connectors

VOUT (J6) and GND (J7).

STEP 5: Turn on the input supply, and move the ENABLE jumper to the enabled position. The EN5319QI is now powered up.

J2 VOUT Jumpers ENABLE

C9 = Ca

Input Capacitor

Figure 1. Evaluation Board top view.

Page 3 of 6 www.altera.com/enpirion

Output Capacitors

Enpirion ® Power Evaluation Board User Guide

EN5319QI PowerSoC

Test Recommendations

To guarantee measurement accuracy, the following precautions should be observed:

Make all input and output voltage measurements at the board using the test points provided (TP5 to TP8). This will eliminate voltage drop across the line and load cables that can produce false readings.

Measure input and output current with series ammeters or accurate shunt resistors. This is especially important when measuring efficiency.

Use a low-loop-inductance scope probe tip similar to the one shown in Figure 2 to measure switching signals and input / output ripple to avoid noise coupling into the probe ground lead. Input ripple, output ripple, and load transient deviation are best measured near the respective input / output capacitors. For more accurate ripple measurement, please see Enpirion App Note regarding this subject

( www.altera.com/enpirion ).

Figure 2. Recommended probe configuration.

If you need to measure radiated EMI, place a 10uF/0805, X7R capacitor at the input and output edges of the PCB (C13 and C14 positions), and connect the

PVIN power and the load to the board at or near these capacitors. The added capacitor at the input edge is for high-frequency decoupling of the input cables.

The one added at the output edge is meant to represent a typical load decoupling capacitor.

Page 4 of 6 www.altera.com/enpirion

Enpirion ® Power Evaluation Board User Guide

EN5319QI PowerSoC

Evaluation Board Schematic

J1

ENABLE

Vin

FB1

TP1

C10

R4

C12

0805

0805

C1

1

VIN

TP8

Vin

1

TP9

POK C9

TP4 TP11 R1

TP5

PGND

TP6

1

1

TP10

C1, C4-6 should be combination 0805/0603.

C3 should be combination

1206/0805/0603.

TP7

VOUT

1

VOUT

1

2

3

4

NC(SW)1

PGND

PGND

VOUT

EN53x9

U1

C3

1206

C4

0805

C5

0805

C6

0805

AVIN

AGND

VFB

NC(13)

16

15

14

13

C11

1 TP3 R7

J2

VIN

J4

TP16

Vin

J5

GND

TP17

TP2

Short across R8 when all other routing completed

R8

TP14 TP15

SCH 06783

PCB 08251

TP12 TP13

Figure 3. Engineering Evaluation board schematic.

Input Protection

C13

VOUT

VOUT

TP18

C8 +

J6

GND

TP19

J7

D1

C14

Page 5 of 6 www.altera.com/enpirion

Enpirion ® Power Evaluation Board User Guide

EN5319QI PowerSoC

Bill of Materials

Designator

C1, C10

C3, C4

C8

C9

C11

C5, C6, C12-C14,

R8

D1

FB1

J1

J2

J4-J7

R1, R3

R2

R4

Qty Description

2 CAP CER 10UF 10V 10% X7R 0805

2 CAP CER 22UF 6.3V X5R 0603

1 CAPACITOR, SMT ELECTROLYTIC, 150UF, 20%, 10V

1 CAP CERM 6.8PF 50V NP0 0805

1 CAPACITOR CER 1UF 10V X5R 0603

6 NOT USED

1 TVS UNIDIRECT 600W 6.5V SMBJ6.5A

1 SMT FERRITE BEAD 4A 0805, Wurth Electronik 742792012

1 CONNECTOR HEADER, 3 POSITION, Samtec ASP-121920-02

1 CONNECTOR HEADER, 8 POSITION Dual, Samtec TSW-104-24-T-D

4 BANANA JACK, KEYSTONE 575-4

2 RES 348K OHM 1/8W 1% 0805

1 RES 523K OHM 1/8W 1% 0805 SMD

1 RES 100K OHM 1/8W 1% 0805 SMD

R5

R6

R7

TP5-TP9,

TP16-TP19

U1

1 RES 232K OHM 1/8W 1% 0805 SMD

1 RES 174K OHM 1/8W 1% 0805 SMD

1 RES ZERO OHM 1/8W 5% 0805 SMD

9 TEST POINT SURFACE MOUNT, KEYSTONE 5016

1 EN5319QI QFN 1.5A

Contact Information

Altera Corporation

101 Innovation Drive

San Jose, CA 95134

Phone: 408-544-7000 www.altera.com

© 2013 Altera Corporation—Confidential. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, HARDCOPY, MAX,

MEGACORE, NIOS, QUARTUS and STRATIX words and logos are trademarks of Altera Corporation and registered in the U.S.

Patent and Trademark Office and in other countries. All other words and logos identified as trademarks or service marks are the property of their respective holders as described at www.altera.com/common/legal.html. Altera warrants performance of its semiconductor products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to any products and services at any time without notice. Altera assumes no responsibility or liability arising out of the application or use of any information, product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are advised to obtain the latest version of device specifications before relying on any published information and before placing orders for products or services.

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