Product # DQ63325QGL09

Phone 1-888-567-9596

Doc.# 005-2DQ632D Rev. B

10/7/03

Page 7

Performance Curves

48Vin 3.3/2.5Vout 87W

Quarter

Quarter

Brick Dual

Brick Dual

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).

Figure 18: Input Terminal Ripple Current, 2.5V & 3.3V outputs at full

Figure 13: Turn-on transient at full rated load current (resistive load)

(10 ms/div).

Ch 1: 2.5Vout (1V/div); Ch 2: 3.3Vout (1V/div)

Ch 3: ON/OFF input (5V/div)

Figure 14: Turn-on transient at zero load current (10 ms/div).

Ch 1: 2.5Vout (1V/div); Ch 2: 3.3Vout (1V/div)

Ch 3: ON/OFF input (5V/div)

Imax; dI/dt = 0.1A/µs). Load cap: 15µF, 300 m

Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2

Imax; dI/dt = 0.1A/µs). Load cap: 15µF, 300 m

Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2

source

impedance

DC/DC

Converter

Figure 19

Figure 18

Figure 20

ceramic

capacitors

15 µF,

300m

Ω ESR

tantalum

capacitors

100 µF,

<1

Ω ESR

electrolytic

capacitor

i

S

i

C

COM

(-)

2.5Vout

3.3Iout

2.5Iout

3.3Vout

2.5Vout

3.3Iout

2.5Iout

3.3Vout

2.5Vout

3.3Vout

2.5Vout

3.3Vout