Technical Specification
3.3Vout
5.0Vout
Input:
Outputs:
Current:
Package:
35-75V
5.0V & 3.3V
40W
Quarter-brick
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;
dI/dt = 0.1A/µs). Load cap: 15µF, 300 m
Ω
ESR tantalum cap & 1µF ceramic cap.
Vout (200mV/div), Iout (5A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2
Figure 22:
Output voltage response to step-change in Iout2 (50%-75%-50% of Imax;
dI/dt = 0.1A/µs). Load cap: 15µF, 300 m
Ω
ESR tantalum cap & 1µF ceramic cap..
Vout (200mV/div), Iout (5A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2
See Fig. 25
source
impedance
10
µ
H
See Fig. 24
See Fig. 26
V
OUT2+
i
S
V
SOURCE
i
C
DC/DC
Converter
1
µ
F
V
OUT1+
15 µF,
300mΩ ESR
tantalum
capacitors
47 µF,
<1Ω ESR
electrolytic
capacitor
ceramic
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).
Product # DQ65033QKA04
Phone 1-888-567-9596
Figure 24:
Input Terminal Ripple Current, 3.3V & 5.0V outputs at 50%
rated output current and nominal input voltage with 10
µ
H source
impedance and 100
µ
F electrolytic capacitor (200 mA/div). (see Fig. 23)
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 8
SYNQOR [ SYNQOR WORLDWIDE HEADQUARTERS ]
