The thermally enhanced VI BRICK VTM current multiplier excels at speed, density and
efficiency to meet the demands of advanced power applications. Combined with the
VI BRICK PRM regulator they create a DC-DC converter with flexibility to provide isolation
and regulation where needed. The PRM can be located with the VTM at the point of load
or remotely in the back plane or on a daughter card.
Part Numbering
VT
Voltage
Transformation
Module
048
Input
Voltage
Designator
A
Package
Size
080
Output
Voltage
Designator
(=V
OUT
x10)
T
030
Output
Current
Designator
(=I
OUT
)
F
P
Product Grade Temperatures (°C)
Grade
T=
M=
Operating
Storage
Baseplate
F
= Slotted flange
T
= Transverse heat sink
[a]
[a]
Contact
Pin Style
P
= Through hole
-40 to +100 -40 to +125
-55 to +100 -65 to +125
factory
Voltage Transformation Module
VT048A080T030FP
vicorpower.com
Rev. 1.0
Page 1 of 11
SPECIFICATIONS
Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and baseplate temperature,
unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate.
Absolute Maximum Ratings
Parameter
+In to -In
+In to -In
PC to -In
VC to -In
+Out to -Out
Isolation voltage
Output current
Peak output current
Output power
Peak output power
Operating temperature
Storage temperature
Values
-1.0 to 60
100
-0.3 to 7.0
-0.3 to 19.0
-0.5 to 16
2,250
30
45.0
267
400
-40 to +100
-55 to +100
-40 to +125
-65 to +125
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
A
A
W
W
°C
°C
°C
°C
Notes
For 100 ms
Input to output
Continuous
For 1 ms
Continuous
For 1 ms
T-Grade; baseplate
M-Grade; baseplate
T-Grade
M-Grade
Note:
Stresses in excess of the maximum ratings can cause permanent damage to the device. Operation of the device is not implied at these or any other conditions
in excess of those given in the specification. Exposure to absolute maximum ratings can adversely affect device reliability.
Input Specifications
Parameter
Input voltage range
Input dV/dt
Input overvoltage turn-on
Input overvoltage turn-off
Input current
Input reflected ripple current
No load power dissipation
Internal input capacitance
Internal input inductance
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Min
26
55.5
59.5
5.4
120
3.2
3.6
5
5.0
Typ
48
Max
55
1
Unit
Vdc
V/µs
Vdc
Vdc
Adc
mA p-p
W
µF
nH
Using test circuit in Figure 10; See Figure 1
Notes
Max V
IN
= 53 V, operating from -55°C to -40°C
Voltage Transformation Module
VT048A080T030FP
vicorpower.com
Rev. 1.0
Page 2 of 11
SPECIFICATIONS (CONT.)
Output Specifications
Parameter
Output voltage
Rated DC current
Peak repetitive current
Short circuit protection set point
Current share accuracy
Efficiency
Half load
Full load
Internal output inductance
Internal output capacitance
Output overvoltage setpoint
Output ripple voltage
No external bypass
30 µF bypass capacitor
Effective switching frequency
Line regulation
K
Load regulation
R
OUT
Transient response
Voltage overshoot
Response time
Recovery time
200
200
1
mV
ns
µs
30 A load step with 100 µF C
IN
; See Figures 7 and 8
See Figures 7 and 8
See Figures 7 and 8
7.5
10.0
mΩ
See Figure 13
0.1650
1/6
0.1683
V
OUT
= K•V
IN
at no load
3.10
132
17
3.20
3.30
220
mVp-p
mVp-p
MHz
See Figures 2 and 5
See Figure 6
Fixed, 1.6 MHz per phase
9.3
95.2
95.0
96.0
95.8
1.6
48
%
%
nH
µF
Vdc
Effective value
Module will shut down
See Figure 3
See Figure 3
42
5
10
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Min
4.34
4.04
0
Typ
Max
9.16
8.89
30
45.0
Unit
Vdc
Vdc
Adc
A
Adc
%
Note
No load
Full load
26 - 55 V
IN
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Module will shut down
See Parallel Operation on Page 7
WAVEFORMS
Ripple vs. Output Current
150
Output Ripple (mVpk-pk)
130
110
90
70
50
30
10
0
3
6
9
12
15
18
21
24
27
30
Output Current (A)
Figure 1
—
Input reflected ripple current at full load and 48 Vf.
Figure 2
—
Output voltage ripple vs. output current at 48 Vf with no POL
bypass capacitance.
Voltage Transformation Module
VT048A080T030FP
vicorpower.com
Rev. 1.0
Page 3 of 11
SPECIFICATIONS (CONT.)
WAVEFORMS
Efficiency vs. Output Current
98
12
Power Dissipation
Power Dissipation (W)
96
Efficiency (%)
94
92
90
88
86
84
82
0
3
6
9
12
15
18
21
24
27
30
Output Current (A)
10
8
6
4
2
0
3
6
9
12
15
18
21
24
27
30
Output Current (A)
Figure 3
—
Efficiency vs. output current.
Figure 4
—
Power dissipation vs. output current.
Figure 5
—
Output voltage ripple at full load and 48 Vf with no POL bypass
capacitance.
Figure 6
—
Output voltage ripple at full load and 48 Vf with 30 µF ceramic
POL bypass capacitance and 20 nH distribution inductance.
Figure 7
—
0-30 A load step with 100 µF input capacitance and no output
capacitance.
Figure 8
—
30-0 A load step with 100 µF input capacitance and no output
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