Input:

Input:

Output:

Output:

Current:

Current:

ackage:

18-60 V

18-60 V

3.3 V

3.3 V

20 A

20 A

Eighth-brick

Eighth-brick

T

pecification

Product # PQ30033EGA20

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2EG33MU Rev. A

3/18/08

Page 7

Figure 18: Input Terminal Ripple Current, ic, at full rated output cur-

electrolytic capacitor (500 mA/div). See Figure 17.

Figure 17: Test set-up diagram showing measurement points for Input

Terminal Ripple Current (Figure 18), Input Reflected Ripple Current

(Figure 19) and Output Voltage Ripple (Figure 20).

source

impedance

DC/DC

Converter

See Fig. 15

See Fig. 14

See Fig. 16

ceramic

capacitor

10 µF,

100m

Ω ESR

tantalum

capacitor

47 µF,

<1

Ω ESR

electrolytic

capacitor

i

S

i

C

Figure 13: Turn-on transient at full load (resistive load) (5 ms/div).

Input voltage pre-applied. Ch 1: Vout (1V/div). Ch 2: ON/OFF input

(5V/div)

Figure 14: Turn-on transient at zero load (5 ms/div).

Ch 1: Vout (1V/div)

Ch 2: ON/OFF input (5V/div)

of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 m

Ω

ESR tantalum capacitor

and 1µF ceramic capacitor. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).

50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 m

Ω

ESR tantalum

capacitor and 1µF ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).