MIL-COTS
MP028F036M12AL
PRM
TM
Regulator
28 Vdc Input
• Vin range 16 – 50 Vdc
• High density – 414
W/in
3
• Small footprint – 108 W/in
2
• Low weight – 0.5 oz (15 g)
• Surface-mount or Through-Hole
package
• Adaptive Loop feedback
• ZVS buck-boost regulator
• 1.3 MHz switching frequency
• 95% efficiency
• -55˚C to 125˚C operation (Tj)
Vin = 16 – 50 V
V
f
= 26 – 50 V
P
f
= 120 W
I
f
= 3.3 A
©
Product Description
The V•I Chip Pre-Regulator Module is a very efficient
non-isolated regulator capable of both boosting and
bucking a wide range input voltage. It is specifically
designed to provide a controlled Factorized Bus
distribution voltage for powering downstream V•I Chip
Voltage Transformation Modules — fast, efficient,
isolated, low noise Point-of-Load (POL) converters. In
combination, PRMs and VTMs
TM
form a complete
DC-DC converter subsystem offering all of the unique
benefits of Vicor’s Factorized Power Architecture (FPA):
high density and efficiency; low noise operation;
architectural flexibility; extremely fast transient response;
and elimination of bulk capacitance at the Point-of-Load
(POL).
In FPA systems, the POL voltage is the product of the
Factorized Bus voltage delivered by the PRM and the
"K-factor" (the fixed voltage transformation ratio) of a
downstream VTM. The PRM controls the Factorized Bus
voltage to provide regulation at the POL. Because VTMs
perform true voltage division and current multiplication,
the Factorized Bus voltage may be set to a value that is
substantially higher than the bus voltages typically
found in "intermediate bus" systems, reducing
distribution losses and enabling use of narrower
distribution bus traces. A Military PRM-VTM chip set can
provide up to 100 A or 115 W at a FPA system density
of 172 A/in
3
or 198 W/in
3
— and because the PRM can
be located, or "factorized," remotely from the POL,
these power densities can effectively be doubled.
The Military PRM described in this data sheet features a
unique "Adaptive Loop" compensation feedback: a
single wire alternative to traditional remote sensing and
feedback loops that enables precise control of an
isolated POL voltage without the need for either a direct
connection to the load or for noise sensitive, bandwidth
limiting, isolation devices in the feedback path.
TM
Absolute Maximum Ratings
Parameter
+In to -In
PC to -In
PR to -In
IL to -In
VC to -In
+Out to -Out
SC to -Out
VH to -Out
OS to -Out
CD to -Out
SG to -Out
Continuous output current
Continuous output power
Case temperature during reflow
Operating junction temperature
Storage temperature
Values
-1.0 to 60.0
-0.3 to 6.0
-0.3 to 9.0
-0.3 to 6.0
-0.3 to 18.0
-0.3 to 59
-0.3 to 3.0
-0.3 to 9.5
-0.3 to 9.0
-0.3 to 9.0
100
3.3
120
225
-55 to 125
-65 to 125
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
Adc
W
°C
°C
°C
Notes
MSL 5
M-Grade
M-Grade
DC-DC Converter
VC
PC
TM
IL
NC
PR
VH
SC
SG
OS
NC
CD
+In
PRM-AL
Factorized
Bus (V
f
)
+In
+Out
+Out
TM
VC
PC
VTM
K
Ro
-Out
Vout
+Out
Vin
–In
–Out
-In
-Out
The MP028F036M12AL is used with any 036 input series VTM to provide a regulated and
isolated output.
vicorpower.com
800-735-6200
V•I Chip Pre-Regulator Module
MP028F036M12AL
Rev. 2.4
Page 1 of 14
VICOR [ VICOR CORPORATION ]
