Input:
Outputs:
Current:
Package:
35-75V
5.0V & 3.3V
40W
Quarter-brick
Technical Specification
3.3Vout
5.0Vout
Figure 25: Input reflected ripple current, i , through a 10
µH source
Figure 26: Output voltage ripple at nominal input voltage and 50%
s
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)
rated load current on both outputs (50 mV/div). Load capacitance: 1µF
ceramic cap & 15µF tantalum cap. Bandwidth: 20 MHz. (see Fig. 23)
4.0
3.5
3.0
6.0
5.5
5.0
4.5
4.0
3.5
2.5
35 V
35 V
48 V
75 V
3.0
2.5
2.0
2.0
48 V
75 V
1.5
0
2
4
6
8
10
12
14
16
18
0
1
2
3
4
5
6
7
8
9
10
11 12
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
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 m
Ω
short circuit.
when the converter attempts to turn on into a 10 m
Ω
short circuit. Top
Bottom trace is an expansion of the on-time portion of the top trace.
Product # DQ65033QKA04 Phone 1-888-567-9596
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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