PRM48BF480T500A00 Datasheet, PDF (12/45 Pages) Vicor Corporation – PRM™ Regulator

PRM48B x 480 y 500A00
REF / REF_EN
REF: REFERENCE (ADAPTIVE LOOP OPERATION ONLY)
• Functions as REF pin in Adaptive Loop operation
• REF represents the internal voltage reference for the voltage control circuit
• V_OUT approximately equal to 20 times REF voltage
Signal Type
Analog Output
State
Regular
Operation
Transition
Attribute
REF Voltage
REF to V_OUT Scale
Factor
REF Resistance
(External)
REF Capacitance
(External)
REF Voltage Ripple
ENABLE to REF Delay
VAUX to REF Delay
Symbol
V_REF
G_{REF_VOUT}
R_{REF_EXT}
C_{REF_EXT}
V_{REF_PP}
t_{ENABLE_REF}
t_{VAUX_REF}
Conditions / Notes
V_OUT = 48V, Trim inactive
V_OUT / V_REF
includes burst mode, 20MHz BW
ENABLE low to REF low
VAUX = 8.1 V to REF soft start ramp initiated
REF_EN: REFERENCE ENABLE (REMOTE SENSE AND SLAVE OPERATION ONLY)
• Functions as REF_EN pin in Remote Sense and Slave operation
• REF_EN signals successful start up and powertrain ready to operate
• Intended to power and enable the external feedback circuit reference in Remote Sense operation
• 3.25V, 4mA regulated voltage source
Signal Type
Analog Output
State
Regular
Operation
Transition
Attribute
REF_EN Voltage
REF_EN Source
Impedance
REF_EN Available
Current
REF_EN Capacitance
(External)
REF_EN Voltage Ripple
ENABLE to REF_EN
Delay
VAUX to REF_EN Delay
Symbol
V_{REF_EN}
R_{OUT_REF_EN}
I_{REF_EN}
C_{REF_EN_EXT}
V_{REF_EN_PP}
t_{ENABLE_REF_EN}
t_{VAUX_REF_EN}
Conditions / Notes
REF_EN unloaded
includes burst mode, 20MHz BW
ENABLE low to REF_EN low
VAUX = 8.1 V to REF_EN high
Min
Typ
Max
Unit
2.4
V
20
V/V
10
MΩ
200
pF
25
mV
120
s
1
ms
Min
Typ
Max
Unit
2.72
3.25
3.37
V
50
100
Ω
4
mA
0.1
F
25
mV
1
ms
1
ms
- 12 -
Rev. 1.0
11/2012