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
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