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CUI Inc

│ SERIES: PDM2-S │ DESCRIPTION: DC-DC CONVERTER

date 01/18/2021

│ page 4 of 6

EMC RECOMMENDED CIRCUIT

TEST CONFIGURATION

Recommended external circuit components

Vin

(Vdc)

C1, C2

CY

LDM

5

4.7μF/50V

--

6.8μH

12

4.7μF/50V

--

6.8μH

15

4.7μF/50V

--

6.8μH

24

4.7μF/50V

1nF/2kV

6.8μH

External components

Lin

4.7μH

Cin

220μF, ESR < 1.0Ω

at 100 kHz

Vin

GND

+Vo

-Vo

(0V)

DC/DC

LOAD

LDM

C1

Vin

GND

Cout

C2

CY

DC

Cin

Lin

DC

Load

Oscilloscope

Current

Probe

DERATING CURVES

Rated Output Voltage

Output Current Percentage (%)

(Nominal Input Voltage)

Tolerance Envelope Curve

(all other models)

10 20

40

60

80

100

10

0

5

-5

Rated Output Voltage

1.0

-7.5

-15

Output Current Percentage (%)

(Nominal Input Voltage)

Tolerance Envelope Curve

(3.3 Vdc output only)

Typical

Load

Line

-10

-15

10 20

40

60

80

100

10

0

5

-5

2.5

-2.5

Typical

Load Line

-10

-15

-7.5

Max

Max

Min

Min

Figure 1

Figure 2

Table 1

Table 2

Note:

1. Input reflected-ripple current is measured with an inductor Lin and capacitor Cin to simulate source impedance.

100

80

60

40

20

Ambient Temperature (°C)

-40-20

0204060

85

105 120

Temperature Derating Curve

Safe operating area

Note:

1. See Table 3 for Cout values.

Additional Resources: Product Page | 3D Model | PCB Footprint