Semtech SC3303 Evaluation Board User guide

Brand: Semtech

Model: SC3303 Evaluation Board

Type: User guide

Semtech SC3303 Evaluation Board is a device designed to provide a working demonstration of the SC3303, a 3A integrated MOSFET regulator with LDO. This board features one 3A integrated MOSFET regulator with LDO, allowing for efficient power management. It provides test points and jumpers for accessing various parameters and circuit capabilities, making it adaptable to specific application requirements. The SC3303 EVB can operate in both continuous conduction mode and power save mode, making it suitable for a wide range of applications.

POWER MANAGEMENT

SC3303 EVB

Evaluation Board

User’s Guide

Description

SC3303 EVB provides one 3A integrated MOSFET regula-

tor with LDO. The EVB is designed to provide a working

demonstration of the SC3303.

This guide contains information on how to use the EVB

and should be used in conjunction with the datasheet for

the device. The datasheet contains detailed information

including the electrical characteristics, operating proce-

dures, circuit design procedures, a typical application

circuit, and other application information.

This guide helps the user to get familiar with the features

of the device. The procedures used to begin EVB operation

are provided. This EVB has many test points and jumpers

in order to access various parameters and circuit capabili-

ties. The user’s can eliminate these test points and jumpers

to simplify the circuit for a specic application.

Revision 2.0

Feature Content

Jumper Settings

Operation

Schematic

Bill of Materials

Layout

•

SC3303 EVB — R4

SC3303 EVB

Jumper Settings

Notes and General Operation

Check the jumper setting per the above

illustration.

Connect a 24V supply at the proper polar-

ity to the input voltage connection (J1).

Connect an output load as required (J2).



The SC3303 EVB (as shipped) operates in

the PSAVE mode with a minimum 25kHz

switching frequency at light load condi-

tions to improve eciency.



J2 — Output

Connector

JP1 — ENABLE / DISABLE

Enable — Connect pins 1-2

Disable — Connect pins 2-3

J1 — Input

Connector

TP3 — LX

TP4 — LDO

SC3303 EVB

Operation

Power Inputs/Outputs

J1 — Input — VIN

J2 — Output — VOUT

Test Points

TP2 — VOUT

TP3 — LX

TP4 — Internal LDO power output (+)

TP8 — VIN

TP10 — FB

Jumper Settings

The jumper settings are found in following table.

Jumper Description

JP1— EN

ENABLE Enable regulator

DISABLE Disable regulator

Operating Instructions

The SC3303 EVB is congured to supply 3.3V @ 3A from

the regulator and 5V @ 100mA from the LDO.

Basic Operation Instructions

The following steps are used for this option.

Verify that all power sources are either o or have

their outputs disabled before proceeding.

Disable the regulator by installing a shorting jumper

in DISABLE position.

Connect a load to the power output ba-

nana jacks at J2 (observe correct polarity).

Note: If using a passive resistive load, any value greater

than 1.1Ω can be used. When using an electronic load,

set for a constant current value equal to or less than

3A. Use hookup wire of at least 16 AWG or greater

with a length as short as possible to the load.

Connect a high current power supply to the banana

jacks at J1, using correct polarity. Note: Standard ba-

nana jack-to-cabling is used.

Turn on or enable the high current power input supply.

Move jumper (JP1) to the ENABLE position. The fol-

lowing conditions should be observed:

VOUT should measure approximately 3.3V and

be sourcing current to the load

A typical waveforms for high and low current operation

are illustrated in the following gures.

Continuous Conduction Mode Operation (3A Load)

Power Save Operation (0A Load)

•

SC3303 EVB

EVB Schematic

TP4

LDO

JP1 - EN

SC3303

BST

VIN

PGND

TON

AGND

LDO

PGOOD

TP1

PGOOD

CBST

CTOP

RTON

RTOP

C13

10nF

820pF

VESR

Enable = Pins 1-2

Disable = Pins 2-3

COUT2

COUT3

VOUT

COUT1

TP2

VOUT

+0.75V to 7.5V

at up to 3A max.

TP3

10nF

TP11

AGND

TP10 - FB

VIN

CLDO2

1μF

1.00kΩ

100kΩ

0.1μF

10μH

34kΩ

TP9

AGND

TP5

PGND

TP7

PGND

TP6

PGND

Position as close to IC as possible

0Ω

RBOT

10kΩ

47μF47μF47μF

154kΩ

CLDO1

1μF

VIN

TP8

VIN

CIN

VIN

10μF

@25V

33kΩ

SC3303 EVB

Bill of Materials

Reference

(1)

Value Footprint Hardware Notes

CIN 10µF/25V SM/C_1206 Murata GRM31CR61E106KA12L

CBST 0.1µF SM/C_0603 Murata GRM188R71H104KA93D

COUT1,C OUT2, COUT3 47µF SM/C_12010 Murata GRM32ER61C476ME15L

CL 10nF SM/C_0603 Murata GRM188R71H103MA01D

C13 10nF SM/C_0603 Murata GRM188R71H103MA01D

C8, CTOP NO_POP Not Used

CC 820pF SM/C_0603

CLDO1, CLDO2 1µF SM/C_0603 Murata GRM188R61A105MA61D

JP1 TH/CON_3_100 Molex 22-03-2031

J1-2

(2)

0.750 Johnson Components TH/BJACK_PAIR_0.750 108-0740-001

(3)

10µH Coilcraft XAL6060-103MEB

MH1-4

(4)

TH/MH_128_PTH Commercial — not specied

R1 100KΩ SM/R_0603 Panasonic ERJ-3EKF1003V

RL 33KΩ SM/R_0603

RTOP 34.0KΩ SM/R_0603 Panasonic ERJ-3EKF3402V

RBOT 10KΩ SM/R_0603 Panasonic ERJ-3EKF1002V

RTON 154KΩ SM/R_0603

R7 1.00KΩ SM/R_0603 Panasonic ERJ-3EKF1001V

R8 0Ω SM/R_0603 Panasonic ERJ-3GEY0R00V

TP1-11 TH/TP_0.040 Mill-Max 3101-2-00-21-00-00-08-0

U1 SC3303 SM/MLPD_3X3-10 Semtech IC

Note:

(1) Critical components are in bold type.

(2) Two parts are used for each jack (four parts total) which are mounted to PCB with a nut on solder side of PCB.

(3) Do not use adhesive under the part

(4) Each mounting hole (MH1-4) uses a hex stando and #4 screw per mounting position.

= 24V, V

OUT

= 3.3V, and I

OUT MAX

= 3A — Standard conguration only, components may vary per specic customer requirements.

SC3303 EVB

Layout Drawings — Top Components

SC3303 EVB

Layout Drawings — Top Layer

SC3303 EVB

Layout Drawings — Inner, Layer 1

SC3303 EVB

Layout Drawings — Inner, Layer 2

SC3303 EVB

Layout Drawings — Bottom Layer

SC3303 EVB

Layout Drawings — Bottom Components

Semtech Corporation

Power Management Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: (805) 498-2111 Fax: (805) 498-3804

www.semtech.com

Contact Information

SC3303 EVB

owner. The information presented in this document does not form part of any quotation or contract, is believed to be

accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any conse-

quence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or

intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected

operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or elec-

trical stress including, but not limited to, exposure to parameters beyond the specied maximum ratings or operation

outside the specied range.

SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-

SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF SEMTECH PRODUCTS

IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer

purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold

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owners.

Semtech SC3303 Evaluation Board User guide

Brand: Semtech

Model: SC3303 Evaluation Board

Type: User guide

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Semtech SC3303 Evaluation Board User guide

Semtech SC3303 Evaluation Board User guide

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