Technical Specification
Input:
Outputs:
Current:
Package:
35-75V
5.0V & 3.3V
40W
Quarter-brick
3.3Vout
5.0Vout
Figure 25:
Input reflected ripple current, is, through a 10
µ
H source
inductor at nominal input voltage and rated load current (5 mA/div).
3.3V and 5.0V outputs at 50% rated load current. (see Fig. 23)
4.0
Figure 26:
Output voltage ripple at nominal input voltage and 50%
rated load current on both outputs (50 mV/div). Load capacitance: 1
µ
F
ceramic cap & 15
µ
F tantalum cap. Bandwidth: 20 MHz. (see Fig. 23)
6.0
5.5
3.5
Output Voltage
(V)
Output Voltage
(V)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
35 V
48 V
75 V
0
1
2
3
4
5
6
7
8
9
10
11
12
3.0
2.5
35 V
2.0
48 V
75 V
1.5
0
2
4
6
8
10
12
14
16
18
Load Current
(A)
Load Current
(A)
Figure 27:
Output voltage vs. load current showing typical current limit
curves and converter shutdown points for the
3.3V
output. 5.0V load is
at 0A.
Figure 28:
Output voltage vs. load current showing typical current limit
curves and converter shutdown points for the
5.0V
output. 3.3V load is
at 0A.
Figure 29:
Load current for
3.3V
output (10A/div) as a function of time
when the converter attempts to turn on into a 10 mΩ short circuit.
Bottom trace is an expansion of the on-time portion of the top trace.
Product # DQ65033QKA04
Phone 1-888-567-9596
Figure 30:
Load current for
5.0V
output (10A/div) as a function of time
when the converter attempts to turn on into a 10 mΩ short circuit. Top
trace is an expansion of the on-time portion of the bottom trace.
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 9
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