Input:
Outputs:
Current:
Package:
35-75V
5.0V & 3.3V
40W
Quarter-brick
Technical Specification
3.3Vout
5.0Vout
3.3Vout
5.0Vout
Figure 19: Turn-on transient at full rated load current (resistive load)
(10 ms/div). Input voltage pre-applied. Ch 1: 3.3Vout (1V/div); Ch 2:
5.0Vout (2V/div), Ch 3: ON/OFF input (5V/div)
Figure 20: Turn-on transient at zero load current (10 ms/div). Ch 1:
3.3Vout (1V/div); Ch 2: 5.0Vout (2V/div), Ch 3: ON/OFF input
(5V/div).
3.3Vout
3.3Vout
3.3Iout
3.3Iout
5.0Vout
5.0Vout
5.0Iout
5.0Iout
Figure 21: Output voltage response to step-change in Iout1 (50%-75%-50% of Imax;
Figure 22: Output voltage response to step-change in Iout2 (50%-75%-50% of Imax;
dI/dt = 0.1A/
µ
s). Load cap: 15
µ
F, 300 m
Ω
ESR tantalum cap & 1
µ
F ceramic cap.
dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum cap & 1µF ceramic cap..
Vout (200mV/div), Iout (5A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2
Vout (200mV/div), Iout (5A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2
See Fig. 25
10 µH
See Fig. 24
source
See Fig. 26
impedance
VOUT2
+
iS
iC
DC/DC
Converter
VOUT1
+
VSOURCE
15
µ
Ω
F,
ESR
1 µF
47 µF,
ceramic
300m
<1
Ω ESR
capacitors
tantalum
electrolytic
capacitor
capacitors
COM (-)
Figure 23: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 24), Input Reflected Ripple Current
(Figure 25) and Output Voltage Ripple (Figure 26).
Figure 24: Input Terminal Ripple Current, 3.3V & 5.0V outputs at 50%
rated output current and nominal input voltage with 10µH source
impedance and 100
µ
F electrolytic capacitor (200 mA/div). (see Fig. 23)
11/11/04 Page 8
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
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