Input:
Output:
35-75 V
1.8 V
Current:
Package:
40 A
Quarter-brick
Technical Specification
See Fig. 15
10 µH
See Fig. 14
source
impedance
See Fig. 16
iS
iC
DC/DC
Converter
VOUT
VSOURCE
10
µ
Ω
F,
ESR
1 µF
47 µF,
ceramic
100m
≅1
Ω ESR
capacitor
tantalum
electrolytic
capacitor
capacitor
Figure 13: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 14), Input Reflected Ripple Current
(Figure 15) and Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, i , at full rated output cur-
c
rent and nominal input voltage with 10
µH source impedance and 47µF
electrolytic capacitor (100 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, i , through a 10 µH source
inductor at nominal input voltage and rated load current (10 mA/div).
See Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated
load current (20 mV/div). Load capacitance: 1 F ceramic capacitor
and 10 F tantalum capacitor. Bandwidth: 500 MHz. See Figure 13.
s
µ
µ
Figure 17: Output voltage response to step-change in input voltage
Figure 18: Load current (50A/div) as a function of time when the con-
verter attempts to turn on into a 1 m short circuit. Bottom trace
(2ms/div) is an expansion of the on-time portion of the top trace.
(50V to 100V in 40
µs). Load cap: 10
µ
F, 100 m
Ω
ESR tantalum capaci-
Ω
tor and 1 F ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Vin (20V/div).
µ
Product # PQ60018QTA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT618C Rev. C
09/08/05
Page 7
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