Product # PQ40150QGx07

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2QG157D Rev. C

11/27/12

Page 8

Input:

Output:

Current:

Package:

18-75V

15V

6.25A

Quarter-brick

source

impedance

DC/DC

Converter

See Fig. 19

See Fig. 18

See Fig. 20

ceramic

capacitor

10 µF,

100m ESR

tantalum

capacitor

47 µF,

<1

ESR

electrolytic

capacitor

Figure 13: Turn-on transient at full load (resistive load) (4 ms/div). Input voltage

pre-applied. Ch 1: Vout (5V/div). Ch 2: ON/OFF input (5V/div).

Figure 14:Turn-on transient at zero load (4 ms/div). Ch 1: Vout (5V/div). Ch 2:

ON/OFF input (5V/div).

Figure 15: Output voltage response to step-change in load current (50%-75%-

50% of Iout(max); dI/dt = 0.1A/μ s). Load cap: 10μ F, 100 mΩ ESR tantalum cap

and 1μ F ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (2A/div).

Figure 16: Output voltage response to step-change in load current (50%-75%-

50% of Iout(max): dI/dt = 5A/μs). Load cap: 470μ F, 30mΩ ESR tantalum cap

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

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

Ripple Current (Fig 18), Input Reflected Ripple Current (Fig 19) and Output

Voltage Ripple (Fig 20).

Figure 18: Input Terminal Ripple Current,

nominal input voltage with 10μH source impedance and 47μF electrolytic

capacitor (200mA/div). See Figure 17.

Technical Figures