background image

7

Rinc

D1

L1

Rfbt

VIN

U1

SW

FB

LMR10530YSD

SW

8

VOUT

Rfbb

Cff

Cinc

Co2

Ren

Co1

Cin

9

5

4

6

10

2

1

11

3

SW

SW

NC

PGND

SGND

DAP

VINC

EN

EN

VIND

VIND

GND

User's Guide

SNVU192A – October 2012 – Revised April 2013

AN-2280 LMR10530 Evaluation Module

1

Introduction

The LMR10530 evaluation module is designed to provide the power supply design engineer with a fully
functional regulator design using the LMR10530 3MHz switching regulator in an WSON-10 package. The
evaluation module is configured to provide an output of 1.2V at up to 3A from an input voltage range of 3V
to 5.5V.

The printed circuit board consists of 4 layers of copper on FR4 material. The middle layers are solid
ground layers with the first middle layer having a small polygon cut out for the V

IN

node. The intermediate

ground layer helps in minimizing the AC current loop. The LMR10530 is thermally tied to the other layers
by thermal vias directly underneath the device. This user's guide contains the evaluation module
schematic, a quick setup procedure, and a Bill-of-Materials (BOM). For complete circuit design
information, see LMR10530 SIMPLE SWITCHER 5.5Vin, 3.0A Step-Down Voltage Regulator in WSON-10
(

SNVS814

).

The module has a C

ff

capacitor footprint reserved for applications requiring higher V

OUT

. The C

ff

cap also

helps to minimize the output voltage overshoot during sluggish startup. For suggested cap values, see the
LMR10530 datasheet (

SNVS814

). The module also has a reserved footprint for an additional output cap,

C

o2

, for certain applications requiring more capacitance.

The performance of the evaluation board is:

Input Range: 3 to 5.5V

Output Voltage: 1.2V

Output Current: 0 to 3A

Frequency of Operation: 3000 kHz

Board Size: 2.016 × 1.08 inches (51.2 × 27.43 mm)

2

Evaluation Board Schematic

Figure 1. LMR10530 Evaluation Module Schematic

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1

SNVU192A – October 2012 – Revised April 2013

AN-2280 LMR10530 Evaluation Module

Submit Documentation Feedback

Copyright © 2012–2013, Texas Instruments Incorporated

Summary of Contents for LMR10530

Page 1: ...tly underneath the device This user s guide contains the evaluation module schematic a quick setup procedure and a Bill of Materials BOM For complete circuit design information see LMR10530 SIMPLE SWITCHER 5 5Vin 3 0A Step Down Voltage Regulator in WSON 10 SNVS814 The module has a Cff capacitor footprint reserved for applications requiring higher VOUT The Cff cap also helps to minimize the output ...

Page 2: ... Step 6 Slowly sweep the input voltage from 3 to 5 5V VOUT should remain in regulation with a nominal 1 2V output 3 2 Starting Up By default VINC is connected to VIN through a low pass filter to remove any high frequency noise present at the input EN is connected to VINC through a 100kΩ resistor A separate logic signal at the EN terminal can be used if startup and shutdown need to be controlled Th...

Page 3: ...iderations 3 4 Typical Test Setup Figure 2 Efficiency Measurements Figure 3 Voltage Ripple Measurements 3 SNVU192A October 2012 Revised April 2013 AN 2280 LMR10530 Evaluation Module Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 4: ... 3 4 5 6 A B C D E F VIN VOUT GND Powering and Loading Considerations www ti com Figure 4 Edge Connector Schematic 4 AN 2280 LMR10530 Evaluation Module SNVU192A October 2012 Revised April 2013 Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 5: ...com Board Images 4 Board Images Figure 5 Top Side 5 SNVU192A October 2012 Revised April 2013 AN 2280 LMR10530 Evaluation Module Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 6: ...oard Images www ti com Figure 6 Bottom Side 6 AN 2280 LMR10530 Evaluation Module SNVU192A October 2012 Revised April 2013 Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 7: ...2V Vin 5 5V VOUT 1 2V 500 mV Div 1V Div 100 Ps DIV VIN 5 5V 2A Div IOUT 3A www ti com Typical Performance Characteristics 5 Typical Performance Characteristics Efficiency vs Load Current VOUT 1 2V Startup Steady state CCM Mode Steady state DCM Mode VIN 3V IOUT 3A VIN 5 5V IOUT 0 025A Load Transient VIN 5 5V IOUT 0 3A to 3A 7 SNVU192A October 2012 Revised April 2013 AN 2280 LMR10530 Evaluation Modu...

Page 8: ...CMS01 Toshiba Rfbt 2 00kΩ 1 1 8W 0603 CRCW06032K00FKEA Vishay Rfbb 2 00kΩ 1 1 8W 0603 CRCW06032K00FKEA Vishay Rinc 10 0Ω 1 1 8W 0603 CRCW060310R0FKEA Vishay Ren 100kΩ 1 1 8W 0603 CRCW0603100KFKEA Vishay VIN Test Point Loop 5010 Keystone SW Test Point Loop 5012 Keystone GND Test Point Loop 5011 Keystone GND Test Point Loop 5011 Keystone VOUT Test Point Loop 5013 Keystone EN Test Point Loop 5014 Key...

Page 9: ...ayout 7 Layout Figure 7 Top Copper Figure 8 Top Overlay 9 SNVU192A October 2012 Revised April 2013 AN 2280 LMR10530 Evaluation Module Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 10: ...com Figure 9 Internal Plane 1 Figure 10 Internal Plane 2 10 AN 2280 LMR10530 Evaluation Module SNVU192A October 2012 Revised April 2013 Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 11: ...ayout Figure 11 Bottom Overlay Figure 12 Bottom Copper 11 SNVU192A October 2012 Revised April 2013 AN 2280 LMR10530 Evaluation Module Submit Documentation Feedback Copyright 2012 2013 Texas Instruments Incorporated ...

Page 12: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

Page 13: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments LMR10530YSDEVM NOPB ...

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