Texas Instruments LMR10530 User Manual

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
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
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 , for certain applications requiring more capacitance.
o2
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
VIN
Rinc
Ren
Cin
Cinc
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SNVU192A – October 2012 – Revised April 2013
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AN-2280 LMR10530 Evaluation Module
capacitor footprint reserved for applications requiring higher V
ff
U1
9 8
SW
VIND
10
7
VIND
SW
2 5
EN
EN
FB
4
1
VINC NC
11
DAP
6
3
PGND
SGND
LMR10530YSD
GND
Figure 1. LMR10530 Evaluation Module Schematic
Copyright © 2012–2013, Texas Instruments Incorporated
SNVU192A – October 2012 – Revised April 2013
SW
L1
SW
D1
AN-2280 LMR10530 Evaluation Module
User's Guide
node. The intermediate
IN
. The C cap also
OUT ff
Rfbt
Cff
Co1
Rfbb
VOUT
Co2
1