Infineon TDM3883 User manual

User Manual Please read the Important Notice and Warnings at the end of this document V 1.0
www.infineon.com/optimos-ipol page 1 of 18 2022-04-28
UM_2111_PL12_2111_034836
User manual for TDM3883 evaluation board
3 A synchronous buck voltage regulator with integrated inductor
About this document
Scope and purpose
The TDM3883 3 A point-of-load (POL) module is an easy-to-use, fully integrated and highly efficient DC-DC
module. The module’s pulse width modulation (PWM) controller, MOSFETs and inductor make TDM3883 a
space-efficient solution, providing accurate power delivery. The TDM3883 employs an enhanced stability
engine that makes it stable with ceramic capacitors without compensation.
This user manual contains the schematic and bill of materials (BOM) for the EVAL_TDM3883_3.3Vout
engineering evaluation board. The manual describes operation and use of the evaluation board itself. Detailed
application information for TDM3883 is available in the TDM3883 datasheet.
Intended audience
This document is intended as a guide for design engineers evaluating the performance of TDM3883 with the
engineering EVAL_TDM3883_3.3Vout demo board.
Table of contents
About this document....................................................................................................................... 1
Scope and purpose ......................................................................................................................... 1
Intended audience.......................................................................................................................... 1
Table of contents............................................................................................................................ 1
1Board information.................................................................................................................. 2
1.1 Board picture and overview....................................................................................................................2
1.2 Board features.........................................................................................................................................2
1.3 Connections and operating instructions................................................................................................3
1.4 Power-on procedure ...............................................................................................................................3
1.5 PCB layout ...............................................................................................................................................4
1.6 Schematic................................................................................................................................................7
1.7 Bill of materials........................................................................................................................................8
2Typical operating waveforms .................................................................................................. 9
2.1 PVin = 5 V....................................................................................................................................................9
2.2 PVin = 12 V................................................................................................................................................11
Revision history.............................................................................................................................17

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User manual for TDM3883 evaluation board
3 A synchronous buck voltage regulator with integrated inductor
Board information
1Board information
1.1 Board picture and overview
VOUT [+]
GND
OCSET
SELECT
BODE PLOT
MEASUREMENT
VIN
SELECT
DEM/FCCM
SELECT
VIN [+]
GND
INPUT CAPACITORS
OUPUT CAPACITORS
TDM3883
Figure 1 TDM3883 evaluation board, dimensions (width x length x thickness) = 40 mm x 40 mm x
1.5 mm
1.2 Board features
•PVin = 12 V, Vout = 3.3 V, Iout = 0 A to 3 A
•PVin = 5 V, Vout = 2.5 V, Iout = 0 A to 3 A (change R15 from 6.98 kΩ to 9.76 kΩ)
•Fsw = 800 kHz
•Cin = 1 x 10 µF (25 V, MLCC, 0603) + 2 x 22 µF (25 V, MLCC, 0805) + 1 x 68 µF (25 V, POSCAP) + 1 x 2.2 µF
(16 V, MLCC, 0402)
•Cout = 3 x 22 µF (6.3 V, MLCC, 0805)
•TDM3883 IC size = 2.7 mm x 3.1 mm x 2.3 mm
•Board ID: TDM3883 EVB DB310 REV 5A

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User manual for TDM3883 evaluation board
3 A synchronous buck voltage regulator with integrated inductor
Board information
1.3 Connections and operating instructions
The TDM3883 demo board allows dual configuration +12 V or +5 V for the input power and can deliver up to 3 A
load current. The operation modes and overcurrent protection (OCP) limits can be selected through jumpers.
Table 1 Connections
Label
Description
Input
Vin
[J36] connect input power (+12 V or +5 V) to this pin
GND
[J37] return of input power
Vin SNS
[J46] sense pins for the PVin
Output
Vout
[J38] connect a load (3 A max.) to this pin
GND
[J39] return of Vout
Vout SNS
[J45] sense pins for the Vout
Bode
A
Use [J43] for bode plot measurement
B
Use [J43] for bode plot measurement
OCSET select
OC SET
Use [J29] jumper to select one of three OCP limits: 3 A; 4 A (w/o
jumper); 5 A
PVin select
Vin
Use [J30] jumper to select PVin: +12 V or +5 V
Pgood
Pgood
[TP7] test point, connect a scope probe to this pin to monitor
power good signal
EN
Enable node
[TP8] test point, connect a scope probe to this pin to monitor EN
signal
DEM/FCCM select
DEM/FCCM
Use [J31] jumper to select DEM or FCCM. DEM, FCCM (w/o) jumper
1.4 Power-on procedure
Table 2 Power-on steps
Jumper
Description
J29
Configure jumper to set OCP threshold
J30
Configure jumper to select PVin
J31
Configure jumper to select between FCCM and DEM
Load
Connect load to Vout [+], Vout [-]
Power supply
Connect power supply to Vin [+], Vin [-]
Apply PVin
PVin ≤ 14 V
Apply load current
Iout ≤ 3 A
Note: Make sure the input supply is turned off before reconfiguring any jumper placement.

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User manual for TDM3883 evaluation board
3 A synchronous buck voltage regulator with integrated inductor
Board information
1.5 PCB layout
The PCB is a six-layer board (1.5 in. x 1.5 in.) using FR4 material. Top and bottom layers use 0.5 oz. base copper
plus 1.5 oz. plating. Inner layers use 2 oz. copper. The PCB thickness is 0.062 in. Layer stack-up is top –GND1 –
GND2 –signal –GND3 –bottom.
TDM3883 and other major power components are mounted on the top side of the board.
Figure 2 Layer stack-up –top and bottom

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3 A synchronous buck voltage regulator with integrated inductor
Board information
Figure 3 Layer stack-up –signal (top) and GND 1 (bottom)

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3 A synchronous buck voltage regulator with integrated inductor
Board information
Figure 4 GND 2 (top) and GND 3 (bottom)

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3 A synchronous buck voltage regulator with integrated inductor
Board information
1.6 Schematic
Figure 5 Schematic of the TDM3883 evaluation board

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3 A synchronous buck voltage regulator with integrated inductor
Board information
1.7 Bill of materials
Table 3 Bill of materials
Qty.
Part
reference
Value
Manufacturer
Part number
Description
1
C1
10 µF
Murata
GRM188R61E106MA73J
Ceramic capacitor, 10 µF, 0603, 25 V,
X5R, 20%
1
C2
0.1 µF
TDK
C1005X7R1C104K
Ceramic capacitor, 0.1 µF, 0402, 16 V,
X7R, 10%
1
C3
68 µF
Panasonic
25TQC68MYF
POSCAP, D2L, 25 V, 20%
3
C10, C11,
C12
22 µF
TDK
C2012X5R0J226M
22 µF, 0805, 6.3 V, X5R, 20%
1
C16
2.2 µF
Murata
GRT155R61E225KE13D
2.2 µF, 0402, 25 V, X5R, 10%
1
C17
2.2 µF
TDK
C1005X6S1C225K050BC
Ceramic capacitor, 2.2 µF, 0402, 16 V,
X6S, 10%
1
C18
100 pF
JDI
500R07N101JV4T
100 pF, 0402, 50 V, C0G, 5%
2
C21, C22
22 µF
Murata
GRM21BR61E226ME44L
Ceramic capacitor, 22 µF, 0805, 25 V,
X5R, 20%
1
R5
0
Panasonic
ERJ-3GEY0R00V
Resistor, 0 Ω,1/10 W, 5%, 0603
1
R7
39.2K
Panasonic
ERJ-2RKF3922x
Resistor, 39.2 kΩ, 1/10 W, 1%, 0402
2
R8, R12
49.9K
Panasonic
ERJ-2RKF4992X
Resistor, 49.9 kΩ, 1/10 W, 1%, 0402
1
R11
60.4K
Yageo
RC0402FR-0760K4L
Resistor, 60.4 kΩ,1/10 W, 1%, 0402
1
R13
16.9K
Panasonic
ERJ-2RKF1692X
Resistor, 16.9 kΩ, 1/16 W, 1%, 0402
1
R14
24.9K
Panasonic
ERJ-2RKF2492X
Resistor, 24.9 kΩ,1/10 W, 1%, 0402
1
R15
6.98K
Vishay
541-6.98KLCT-ND
Resistor, 6.98 kΩ, 1/16 W, 1%, 0402
1
U2
TDM3883
Infineon
TDM3883
3 A iPOL synchronous buck voltage
regulator with integrated inductor

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
2Typical operating waveforms
2.1 PVin = 5 V
Figure 6 Start-up, PVin = 5 V, Vout = 2.5 V, Iout = 0 A, FCCM. Ch1 = Vout, Ch2 = PVin, Ch3 = Pgood, Ch4 = VCC,
Ch5 = enable, Ch6 = Vfeedback
Figure 7 Start-up, PVin = 5 V, Vout = 2.5 V, Iout = 3 A, FCCM. Ch1 = Vout, Ch2 = PVin, Ch3 = Pgood, Ch4 = VCC,
Ch5 = enable, Ch6 = Vfeedback

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
Figure 8 Load regulation, PVin = 5 V, Vout = 2.5 V
Note: In Section 2.1, PVin = 5 V. R15 is changed from 6.98 kΩ to 9.76 kΩ to configure Vout = 2.5 V.

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
2.2 PVin = 12 V
Figure 9 Start-up, PVin = 12 V, Vout = 3.3 V, Iout = 0 A, FCCM. Ch1 = Vout, Ch2 = PVin, Ch3 = Pgood, Ch4 = VCC,
Ch5 = enable, Ch6 = Vfeedback
Figure 10 Start-up, PVin = 12 V, Vout = 3.3 V, Iout = 3 A, FCCM. Ch1 = Vout, Ch3 = PVin, Ch3 = Pgood, Ch4 = VCC,
Ch5 = enable, Ch6 = Vfeedback

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
Figure 11 Start-up pre-bias (1 V), PVin = 12 V, Vout = 3.3 V, Iout = 0 A, FCCM. Ch1 = Vout, Ch2 = PVin,
Ch3 = Pgood, Ch4 = VCC, Ch5 = enable, Ch6 = Vfeedback
Figure 12 Short circuit, PVin = 12 V, Vout = 3.3 V, Iout = 3 A, FCCM. Ch1 = Vout, Ch2 = PVin, Ch3 = Pgood,
Ch4 = VCC, Ch5 = enable, Ch6 = Vfeedback

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
Figure 13 Recover from a shorted Vout, PVin = 12 V, Vout = 3.3 V, Iout = 3 A, FCCM. Ch1 = Vout, Ch2 = PVin,
Ch3 = Pgood, Ch4 = VCC, Ch5 = enable, Ch6 = Vfeedback
Figure 14 Vout ripple, PVin = 12 V, Vout = 3.3 V, Iout = 3 A, FCCM. Ch1 = Vout

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
Figure 15 Transient response, PVin = 12 V, Vout = 3.3 V, Iout = 0 A to 3 A, FCCM. Ch1 = Vout, Ch2 = Iout.
Slew rate = 5 A/µS

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
Figure 16 Load regulation, PVin = 12 V, Vout = 3.3 V
Figure 17 Efficiency, PVin = 12 V, Vout = 3.3 V

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3 A synchronous buck voltage regulator with integrated inductor
Typical operating waveforms
Room temperature, no airflow.
Board data:
TDM3883 EVB DB310 REV 5A
Dimensions (width x length x thickness) = 40 mm x 40 mm x 1.5 mm
Figure 18 Thermal image of the board at 3 A load, PVin = 12 V, Vout = 3.3 V, Ta= 25°C

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3 A synchronous buck voltage regulator with integrated inductor
Revision history
Revision history
Document version
Date of release
Description of changes
V 1.0
2022-04-28
Initial release

Published by
Infineon Technologies AG
81726 Munich, Germany
© 2022 Infineon Technologies AG.
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IMPORTANT NOTICE
The information contained in this application note
is given as a hint for the implementation of the
product only and shall in no event be regarded as a
description or warranty of a certain functionality,
condition or quality of the product. Before
implementation of the product, the recipient of this
application note must verify any function and other
technical information given herein in the real
application. Infineon Technologies hereby
disclaims any and all warranties and liabilities of
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any third party) with respect to any and all
information given in this application note.
The data contained in this document is exclusively
intended for technically trained staff. It is the
responsibility of customer’s technical departments
to evaluate the suitability of the product for the
intended application and the completeness of the
product information given in this document with
respect to such application.
For further information on the product, technology,
delivery terms and conditions and prices please
contact your nearest Infineon Technologies office
(www.infineon.com).
WARNINGS
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contain dangerous substances. For information on
the types in question please contact your nearest
Infineon Technologies office.
Except as otherwise explicitly approved by Infineon
Technologies in a written document signed by
authorized representatives of Infineon
Technologies, Infineon Technologies’ products may
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Edition 2022-04-28
UM_2111_PL12_2111_034836
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