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NEVB-NPS4053 load switch evaluation board

Abstract:

The NEVB-NPS4053 evaluation board is a two-layer PCB containing the NPS4053 load switch device.
The VIN and VOUT connections to the device and the PCB layout routing are capable of handling highcontinuous currents and provide a low-resistance pathway into and out of the device under test. Test
point connections allow the EVB user to control the device with user-defined test conditions and makeaccurate RON measurements.

Keywords:

Load switch, evaluation board (EVB)

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NEVB-NPS4053 load switch evaluation board

1. Introduction
The NEVB-NPS4053 is a dedicated PCB featuring the Nexperia load switch IC NPS4053 in a
HWSON6 package (NPS4053GH). The PCB can also be used to evaluate the device in a TSOP6
package (NPS4053GV) see Fig. 1, Fig. 2 and Fig. 3.
The board is a 2-layer PCB with a substantial ground layer. The PCB layout routing is capableof handling high continuous currents and provide a low-resistance pathway into and out of thedevice under test. The test points are designed as separate voltage sensing connections on the
PCB for accurate voltage and RON measurements where the test results are not influenced byvoltage drops created by the load current. Solid input and output connections are provided withconvenient test-point connection pins as well as robust solder pins. There are several connection
terminals for GND and test points at the input and output of the load switch to allow a simple andvery convenient connection of oscilloscope probes.

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User manualFig. 1.

NEVB-NPS4053; evaluation board for load switch IC NPS4053 top view (U1 is not
fitted)Fig. 2.

NEVB-NPS4053; evaluation board for load switch IC NPS4053 bottom view (U2 isfitted)All information provided in this document is subject to legal disclaimers.

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Note: if U1 is fitted U2 should be removed.
Fig. 3.

NEVB-NPS4053; evaluation board for load switch IC NPS4053 top view with U1
fitted

1.1. Key Parameters
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•
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•
•
•
•
•
•
•
•
•

EVB name = NEVB-NPS4053
Device = NPS4053
Input operating voltage range (VIN): 2.5 V to 5.5 V
Rated currents of 2 A
ON resistance (RON): 55 mΩ±6% current accuracy at 1.2 A
LIM pin protection: can be shorted to ground or be floating
No body diode when disabled (no current path from OUT to IN)
Active reverse input - output voltage protection
Built in soft start
UL 62368 Recognition
15 KV ESD protection per IEC 61000-4-2 (with external capacitance)

1.2. Features
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•
•
•
•

•

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Input voltage can be supplied via the test points J1 (VIN), VIN can range from 2.5 V to 5.5 V.
A test load can be connected to terminal J3 (VOUT).
Alternatively, there are GND test points at TP6, TP7, TP8, and TP9.
Decouplingcapacitors are connected to VIN at the input of the EVB and close to the load switch
IC. The same holds for the output.
The enable pin (ON) has a smart pull-down resistor built in which disables the load switch if theenable pin is not terminated. For an activated load switch, the pull-down resistor is decoupled.
This avoids current flowing through a pull-down that is not needed for the high state of thecontrol input.
VIN_Sense (TP1) and VOUT_Sense (TP5) are used when accurate measurements of the input
or output are required. Make RON measurements using these Kelvin sense connections whenmeasuring the voltage drop from VIN to VOUT.

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2. SchematicFig. 4 shows the schematic diagram of the NEVB-NPS4053 evaluation board. The components,
solder pins, connectors and test points described in the feature list above can be found here.

Note: if U1 is fitted U2 should be removed.
Fig. 4.

NEVB-NPS4053 schematic diagram

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3. PCB layout
Fig. 5 shows the PCB layout of the NEVB-NPS4053. The PCB has two layers, the top layer isshown in Fig. 5 a), the bottom layer is shown in Fig. 5 b).

a) top layerb) bottom layer
Fig. 5.

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NEVB-NPS4053 PCB layouts

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4. Bill of Materials (BOM)
Table 1. NEVB-NPS4053 Bill of Materials
Component
Description

Designator

Quantity

PCB

Printed Circuit Board

CL21X106KOQNNNE

10 µF+/-10% 16V X6S 2 0805

C1

1

LMK212SD104KG-T

0.1 µF ±10% 10 V Ceramic Capacitor 0805 (2012
Metric)C2, C3

2

293D127X96R3D2TE3

120 µF Molded Tantalum Capacitors 6.3 V 2917 (7343
Metric) 700 mΩ

C4

1

1715022

TERM BLK 2POS SIDE ENTRY 5 mm PCB

J1, J3,2

5-146278-2

CONN HEADER VERT 2POS 2.54 mm

J2

1

RNCS0805BKE10K0

RES 10 KΩ 1% 1/8W 0805

R1, R2

2

ERA-6AEB203V

RES 20 KΩ 0.1% 1/8W 0805

R3

1

RC0805FR-07191KL

RES 191 KΩ 1% 1/8W 0805

R4

1

5-146278-3

CONN HEADER VERT 3POS 2.54 mm

S1

1

5019

PC TEST POINT MINIATURE

TP1, TP2, TP3, TP4, TP5, 9
TP6, TP7, TP8, TP9

NPS4053GVNPS4053 TSOP6 package [1]

U1

DNP

NPS4053GH

NPS4053 WSON6 package [1]

U2

1

[1]

1

The NEVB-NPS4053 can accommodate the WSON6 or the TSOP-6 package. The WSON6 package is located on the back of the EVB
and the TSOP-6 package is located on the front.

5. Set up and operation
The NEVB-NPS4053 board is quite easy to set up and operate. This chapters gives some
instructions for proper use.

5.1. Input supply
The input voltage source VIN is connected to the points J1(IN), VIN. This is where the positive leadis connected. The points J1(GND), J3 (GND), TP6, TP7, TP8, TP9. are the ground connections.
For experiments with higher current, the cables from the power supply to the EVB should be
adequate regarding resistance in order to avoid higher voltage losses from the power supply to theload switch board.

5.2. Load switch output
Loads at the output can be connected via the test points labeled OUT. The direct groundconnections are appropriately labeled across the EVM

5.3. Enable control
Connector S1 connects the enable input EN of the load switch IC to either VIN or GND, hence
turning the load switch IC on or off. External control signals can be applied via S1 pin 2 from anexternal function generator for example see Fig. 6. The limits from the data sheet must be obeyed
for the voltage applied at the enable pin. Furthermore, make sure S1 pin 2 isn’t jumpered to Pins 1
or 3.

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VIN
S1

1
2
3

10K

IN

OUT

/FLT

ILIM

ON

GND

aaa-036767

Fig. 6.

NEVB-NPS4053 enable options

5.4. Voltage sense test points
The NEVB-NPS4053 includes Kelvin sense test points for VIN and VOUT, these are labeled
VIN_Sense and VOUT_Sense. These test pins allow for precise measurement of the input andoutput voltages present at the package pins of the load switch IC. At these test points there is no
influence from voltage drop due to the impedance of the PCB traces. Ron can be evaluated withexact results at these test points as:

R ON =( VIN_Sense - VOUT_Sense(
I OUT

(1)

5.5. Start-up operation
To start operating the NEVB-NPS4053, connect a power supply with 2.5 V to 5.5 V to VIN. The
load switch needs to be enabled by applying a jumper to S1 pins 3 and 2 or applying a high-level
input signal to the enable pin as described in Section 5.3. With a load connected to the VOUT
terminals, a maximum continuous output current of 2 A can be supported by the NPS4053.

6. Test configurations
6.1. Measurement set-up for on-resistance
The NEVB-NPS4053 supports accurate measurement of the load switch IC on-resistance. Using a
voltmeter, DC power supply, and a load connected at the output, on-resistance measurements of
the IC can be made. A typical load current for this measurement is around 200 mA.
Fig. 7 shows connections for a voltmeter, input voltage source and load.

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Voltmeter

DC Power
SupplyFig. 7.

E-LoadMeasurement set-up for RON

6.2. Dynamic parameter testing
Dynamic parameters like the smooth turn-on of the NPS4053 can be measured at VOUT_Sense
using an oscilloscope. At S1 pin 2 the enable signal can be accessed and used as trigger signal.
Fig. 8 shows the oscilloscope connection points for measurement of VIN and VOUT with triggeringfrom the enable input. With the same set-up the fall time of VOUT can be measured.

DC Power
SupplyFig. 8.

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E-LoadMeasurement set-up for dynamic parameters e.g. VOUT rise and fall times

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7. Revision history
Table 2. Revision history
Revision
Date
numberDescription

2.0

2024-08-06

Fig. 1 updated, Fig. 2 added, minor text updates.

1.0

2023-07-08

Initial version.

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8. Legal information
Definitions
Draft — The document is a draft version only. The content is still underinternal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included hereinand shall have no liability for the consequences of use of such information.

Disclaimers
Limited warranty and liability — Information in this document is believed
to be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy
or completeness of such information and shall have no liability for theconsequences of use of such information. Nexperia takes no responsibility
for the content in this document if provided by an information source outsideof Nexperia.
In no event shall Nexperia be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removalor replacement of any products or rework charges) whether or not suchdamages are based on tort (including negligence), warranty, breach ofcontract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with theTerms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make changes
to information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-criticalsystems or equipment, nor in applications where failure or malfunctionof an Nexperia product can reasonably be expected to result in personal
injury, death or severe property or environmental damage. Nexperia and its
suppliers accept no liability for inclusion and/or use of Nexperia products insuch equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.
Applications — Applications that are described herein for any of theseproducts are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia accepts no liability forany assistance with applications or customer product design. It is customer’ssole responsibility to determine whether the Nexperia product is suitableand fit for the customer’s applications and products planned, as well as
for the planned application and use of customer’s third party customer(s).
Customers should provide appropriate design and operating safeguards tominimize the risks associated with their applications and products.
Nexperia does not accept any liability related to any default, damage, costs
or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for thecustomer’s applications and products using Nexperia products in order toavoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Nexperia does not accept any
liability in this respect.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a priorauthorization from competent authorities.
Translations — A non-English (translated) version of a document is forreference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.

Trademarks
Notice: All referenced brands, product names, service names andtrademarks are the property of their respective owners.

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List of Tables
Table 1. NEVB-NPS4053 Bill of Materials........................... 6
Table 2. Revision history......................................................9UM90023
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List of Figures
Fig. 1. NEVB-NPS4053; evaluation board for load
switch IC NPS4053 top view (U1 is not fitted)..................... 2
Fig. 2. NEVB-NPS4053; evaluation board for load
switch IC NPS4053 bottom view (U2 is fitted)..................... 2
Fig. 3. NEVB-NPS4053; evaluation board for load
switch IC NPS4053 top view with U1 fitted..........................3
Fig. 4. NEVB-NPS4053 schematic diagram.........................4
Fig. 5. NEVB-NPS4053 PCB layouts...................................5
Fig. 6. NEVB-NPS4053 enable options............................... 7
Fig. 7. Measurement set-up for RON...................................8
Fig. 8. Measurement set-up for dynamic parameters
e.g. VOUT rise and fall times.............................................. 8

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Contents
1. Introduction................................................................... 2
1.1. Key Parameters...........................................................3
1.2. Features.......................................................................3
2. Schematic......................................................................4
3. PCB layout.................................................................... 5
4. Bill of Materials (BOM)................................................. 6
5. Set up and operation................................................... 6
5.1. Input supply................................................................. 6
5.2. Load switch output...................................................... 6
5.3. Enable control..............................................................6
5.4. Voltage sense test points............................................ 7
5.5. Start-up operation........................................................ 7
6. Test configurations.......................................................7
6.1. Measurement set-up for on-resistance........................ 7
6.2. Dynamic parameter testing..........................................8
7. Revision history............................................................9
8. Legal information........................................................10© Nexperia B.V. 2024. All rights reserved

For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 6 August 2024

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