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Not Recommended for New Designs
Electrical Specifications (continued)
Output Specs (Conditions are at 45 Vin, 48 Vf, full load, and 25°C ambient unless otherwise specified)
V?I Chip Regulator
Parameter
Output voltage range
Output power
Output current
DC current limit
Average short circuit current
Min
26
0
0
3.7
Typ
48
4.2
Max
55
170
3.5
4.7
0.5
Unit
Vdc
W
Adc
Adc
A
Note
Factorized Bus voltage (Vf) set by R OS
I L pin floating
Auto recovery
Set point accuracy
1.5
%
Line regulation
Load regulation
Load regulation (at VTM output)
Current share accuracy
0.1
0.1
1.0
5
0.2
0.2
2.0
10
%
%
%
%
Low line to high line
No CD resistor
Adaptive Loop
Efficiency
Full load
96.7
%
See Figure 6,7 & 8
Output overvoltage set point
56
59.4
Vdc
Output ripple voltage
No external bypass
With 10 μF capacitor
1.25
0.75
1.75
1.0
%
%
Factorized Bus, see Figure 13
Factorized Bus, see Figure 14
Switching frequency
1.35
1.45
1.56
MHz
Fixed frequency - across entire operating range
Output turn-on delay
From application of power
From PC pin high
Internal output capacitance
Factorized Bus capacitance
180
100
5
230
47
ms
μs
μF
μF
See Figure 2
See Figure 3
Ceramic
vicorpower.com
800-735-6200
V?I Chip Regulator
P045F048T17AL
Rev. 2.6
Page 4 of 14
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