www.recom-power.com REV.: 1/2019 P-1
RPM-1.0-EVM-1
Evaluation Module
Features
Evaluation
Module
• Evaluation platform for RPM-1.0
buck regulator modules
• Thermal design considerations included
• EMI Class B filter
• Easy evaluation of trimming, sequencing, soft start,
enable and sensing functions
Description
The RPM3.3-1.0-EVM-1 and RPM5.0-1.0-EVM-1 generate a constant output voltage with an
output current up to 1A from an external DC Source. All the functions of the RPM3.3-1.0 and
RPM5.0-1.0 like trimming, sequencing, soft-start, enable and sensing can be evaluated. Also the
behavior in overload or over temperature can be evaluated easily before it is designed in. There are also
evaluation modules with other output currents available.
Selection Guide
Part Input Output Output
Number Voltage Range Voltage Current
[VDC] [VDC] [A]
RPM3.3-1.0-EVM-1 3 - 17 3.3 1
RPM5.0-1.0-EVM-1 3 - 17 5 1
Caution:
ESD sensitive. Always follow ESD preventative procedures when
handling the product!
Quick Start Guide
1) Connect CON1 to power supply
2) Connect CON2 to a Load
3) Connect sense to the required potential
The sense preset is via R3 directly at the power module, so the preset voltage is very accurate
at the output of the RPM. To equalize ohmic losses of the filter, remove the resistor at R3, and
solder a 0Ω resistor at R4. To sense directly at the load, desolder R3 and R4, and connect
Pin3 of CON2 to the positive potential of the load.
Notice: if voltage drop from the output to the load is too high, voltage overshoots may occur
– especially during load jumps.
4) Disable the device via CON3
The device is preset as normally on. It can be disabled by pulling the enable pin to GND.
Short R1 to disable the device.
www.recom-power.com REV.: 1/2019 P-2
Evaluation Module
Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
RPM-1.0-EVM-1
Pin Name Description
1,2 Vin Positive Input Voltage (observe correct polarity!)
3 NC Not connected
4,5 GND Negative Input Voltage (Common GND)
Pin Name Description
1 ON Connect to Vin
2 EN Enable Pin (leae open if not used)
3 OFF Connected to GND
Pin Name Description
1,2 Vout Positive Output Voltage
3 SENSE Output Voltage Sense Pin (leave open if not used)
4,5 GND Negative Output Voltage (Common GND)
Pin Name Description
1 PG Power Good Signal
2 SEQ Sequencing and soft start
3 MODE Not used
4 VSEL Not used
Connector Description
Con1
Con3
Con2
Con4
Component Placement
CON1
L2
L1
L6
R6
C7
R1
C3
C2
R5
R7
IC1
L3
C1
C4
CON2
C6
CON4
C5
C9
R2
L8
R8
R4
R3
CON3
L7
L5
C8 L4
PG
VOUT
SEQ
RECOM 12.2x12.2mm Evaluation Board
version 03
VSEL
OFFON
SENSE
GND
EN
VIN
1
2
3
4
5
1
2
3
4
5
MODE
GND
www.recom-power.com REV.: 1/2019 P-3
Evaluation Module
Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
RPM-1.0-EVM-1
vi
1
2
C9
1206
1
2
L5 0805
1
2
L7
1
2
C5
1206
1 2
R7
0603
1 2
R4
0603
2
CON1-B
4
CON1-D
3
CON3-C
3
CON4-C
12
vsel
R8
0E0
0603
100mW
1
2
L2 0805
4
CON2-D
A1
A2
C1
E1
A3
A4
E2
B1
E5
D1
C5
B5
A5
TRIM
GND2
GND
GND3
V
OUT
V
IN
EN
SENSE
NC
NC
MODE
IC1
E4
IC1-M
1
CON4-A
3
sense
CON2-C
1
2
L1 0603
1
2
vin
L3 1206
1
2
L4 0603
1
2
vout
L6 1206
4
CON4-D
1
2
C1
1206
1 2
R6 0603
1
2
C3
1206
1 2
R2
0603
1
2
C8
1206
5
CON1-E
1 2
R3
0603
5
CON2-E
2
CON4-B
1
2
C2
1210
1
2
vo
C4
1210
1
2
L8
2
CON2-B
1
2
C6
1206
1
2
C7
1206
1 2
R1
0603
2
en
CON3-B
1
CON1-A
12
R5
0603
1
CON3-A
1
CON2-A
V
OUT
VSEL
GND
PG
EN
V
IN
GND
SEQ
SENSE
MODE
Schematic
Description
IC1: RPM-1.0 power module.
C1,C2,L1,L2,L3,L7,C5,C6: allow placement of various sized components to test input filter design. The populated filter is designed to meet
EN55032 class B.
C7,C8,L4,L5,L6,L8,C3,C4: allow placement of various sized components to test output filter design. The populated filter is designed to meet
EN55032 class B.
R1 and R2: configure enable pin. These resistors are not populated. The preset of IC1 is always on. Refer to IC1 datasheet for more information.
C9: sets soft-start time. Refer to IC1 datasheet for more information.
R3: populated 0Ω resistor for direct output voltage measurement. If sense is desired at a different location, for example after the filter or directly
at the load, unsolder R3, and connect sense to the new measurement point.
R4: sense point for output voltage after the filter. To set sense point here, remove R3 and solder a 0Ω resistor at R4.
R7 and R8: no function on this board.
R5 and R6: trim the output voltage between 0.9V and 6.0V
www.recom-power.com REV.: 1/2019 P-4
Evaluation Module
Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
RPM-1.0-EVM-1
OUTPUT VOLTAGE TRIMMING
The RPM series offers the feature of trimming the output voltage over a range between 0.9V and 6V by using external trim resistors. The values
for trim resistors shown in trim tables below are according to standard E96 values; therefore, the specified voltage may slightly vary.
Trim up Trim down
Voutnom R1R2R3Vref
3.3VDC 376kW
1kW471kW
0.81VDC
5VDC 344kW431kW
Practical Example RPM3.3-1.0:
Calculation:
Voutnom = nominal output voltage [VDC]
Voutset = trimmed output voltage [VDC]
Vref = reference voltage [VDC]
Rup = trim up resistor [W]
Rdown = trim down resistor [W]
R1, R2, R3 = internal resistors [W]
Rup =376k - 1k =375kW
4.3 - 3.3
Rup according to E96 ≈ 374kWRdown according to E96 ≈ 309kW
Rdown =(1.8 - 0.81) x 471k = 311kW
3.3 - 1.8
Rdown =(Voutset - Vref) x R3
Voutnom - Voutset
Rup =R1 - R2
Voutset - Vnom
Voutset =3.5 3.7 3.9 4.1 4.3 4.5 4.7 5.0 5.5 6.0 [VDC]
Rup (E96) ≈1M87 931k 619k 464k 374k 309k 267k 221k 169k 137k [W]
RPM3.3-1.0
Trim up
Trim up
Trim down
Trim down
Voutset =3.0 2.7 2.5 2.2 2.0 1.8 1.5 1.2 1.0 0.9 [VDC]
Rdown (E96) ≈ 3M40 1M47 1M 590k 432k 309k 182k 86k6 39k2 17k4 [W]
Voutset =5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 [VDC]
Rup (E96) ≈2M21 1M33 976k 750k 619k 523k 453k 402k 357k 324k [W]
RPM5.0-1.0
Voutset =4.5 4.0 3.5 3.3 2.5 1.8 1.5 1.2 1.0 0.9 [VDC]
Rdown (E96) ≈ 3M16 1M37 768k 634k 294k 133k 84k5 44k2 20k5 9k53 [W]
Rup
+Vout
Trim
Rdown
GND
Trim
www.recom-power.com REV.: 1/2019 P-5
Evaluation Module
Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
RPM-1.0-EVM-1
continued on next page
BOM
Comp. Description Manufacturer Part Number Manufacturer Remarks
C2 10µF ±10% 63V X7R MLCC 1210 GRM32ER71J106KA12L Murata not mounted
C4 10µF ±10% 63V X7R MLCC 1210 GRM32ER71J106KA12L Murata not mounted
C1 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden
C3 22µF 10V X7R 1206 CL31B226MPHNNNE Samsung not mounted
C5 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden not mounted
C6 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden
Layout
Top Layer Layer 2 (GND)
Bottom (GND)
Layer 3 (GND)
Notes:
Note1: Visit www.recom-power.com/eval-ref-boards to download the Gerber files
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Dimension (LxWxH) 90.0 x 60.0 x 26.0mm
Weight 23.3g typ.
www.recom-power.com REV.: 1/2019 P-6
Evaluation Module
Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
RPM-1.0-EVM-1
Comp. Description Manufacturer Part Number Manufacturer Remarks
C7 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden not mounted
C8 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden not mounted
C9 100nF 50V X7R 1206 CL31B104KBCNNNC Samsung not mounted
CON3 RS Pro Header 2.54mm 3 pin W81103T3825RC RS
CON4 RS Pro Header 2.54mm 4 pin W81104T3825RC RS
CON1 RS Pro Header 2.54mm 5 pin W81105T3825RC RS
CON2 RS Pro Header 2.54mm 5 pin W81105T3825RC RS
L7 FERRITE BEAD 70 OHM 2SMD 1LN 742792510 Würth Electronics not mounted
L8 FERRITE BEAD 98 OHM 2SMD 1LN 7427932 Würth Electronics not mounted
L3 FERRITE BEAD 600 OHM 1206 1LN 74279218 Würth Electronics
L6 0 Ohm Resistor free free
L2 FERRITE BEAD 330 OHM 0805 1LN FBMH2012HM331-T Taiyo Yuden not mounted
L5 FERRITE BEAD 330 OHM 0805 1LN FBMH2012HM331-T Taiyo Yuden not mounted
L1 FERRITE BEAD 600 OHM 0603 1LN 742792651 Würth Electronics not mounted
L4 FERRITE BEAD 600 OHM 0603 1LN 742792651 Würth Electronics not mounted
FD1 - FD4 Fiducial 1mm Cu with 3mm Solder Resist
R1 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted
R3 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo
R4 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted
R5 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted
R6 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted
R7 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted
R8 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted
R2 RES SMD 1M OHM 1% 1/10W 0603 RC0603FR-071ML Yageo not mounted
SP1 - SP4 Spacer 4mm 709955000 Würth Electronics
IC1 (3) RPM-1.0 Module RPMxx-1.0 RECOM
Notes:
Note2: IC1 is RPM5.0-1.0 for RPM5.0-1.0-EVM-1 and RPM3.3-1.0 for RPM3.3-1.0-EVM-1
• RPM-1.0-EVM-1 evaluation module
• Terms and conditions
Contents
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause
loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized
use of RECOM products in such safety-critical applications.
PACKAGING INFORMATION
Parameter Type Value
Packaging Dimension (LxWxH) carton 200.0 x 135.0 x 68.0mm
Packaging Quantity 1pcs
