Specifications, continued
OUTPUT (Conditions are at nominal line, full load, and 25°C ambient unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Note
Rated DC current
0
12.5
A
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Peak repetitive current
18.7
A
DC current limit
12.5
16.0
5
20.0
10
A
Current share accuracy
Efficiency
%
See Parallel Operation on page 11
Half load
95.0
95.0
95.8
96.0
1.6
%
%
See Fig.5
See Fig.5
Full load
Internal output inductance
Internal output capacitance
Load capacitance
Output overvoltage setpoint
Output ripple voltage
No external bypass
1µF bypass capacitor
Average short circuit current
Effective switching frequency
Line regulation
nH
µF
µF
V
12
Effective value
1000
150
14.75
90
8
mV
mV
See Figs.7 and 10
See Fig.8
200
3.5
mA
2.8
4.2
0.255
32
MHz
Fixed, 1.75 MHz per phase
VOUT=K•VIN at no load
See Figs.9 and 28
K
0.245
0.250
Load regulation
ROUT
mΩ
Transient response
Voltage undershoot
Voltage overshoot
Response time
148
144
200
1
mV
mV
ns
0-12.5A load step, w/Cin=100µF, see Fig.11
12.5-0A load step, w/Cin =100µF, see Fig.12
See Figs.11 and 12
Recovery time
µs
See Figs.11 and 12
Output overshoot
Input turn-on
0
0
mV
mV
No output filter; See Fig.2
No output filter; See Fig.3
PC enable
Output turn-on delay
From application of power
From release of PC pin
160
320
300
410
ms
µs
See Fig.3
See Fig.2
OUTPUT WAVEFORMS
Efficiency vs. Output Power
Power Dissipation
97
96
95
94
93
92
91
90
89
88
7
6
5
4
3
2
1
0
0
0
20
40
60
80
100
120
140
20
40
60
80
100
120
140
Output Power (W)
Output Power (W)
Figure 5— Efficiency vs. output power at nominal VIN
Figure 6—Power dissipation as a function of output power
Vicor Corporation
Tel: 800-735-6200
V•I Chip Bus Converter
B048K120T15
Rev. 1.2
Page 3 of 16
45 vicorpower.com
VICOR [ VICOR CORPORATION ]
