PRM48BF480T500A00 Datasheet, PDF (11/45 Pages) Vicor Corporation – PRM™ Regulator

PRM48B x 480 y 500A00
AL: ADAPTIVE LOOP (ADAPTIVE LOOP OPERATION ONLY)
• Provides Adaptive Loop load line programming in Adaptive Loop operation
• Internal pullup to V_{CC_INT} through10kΩ resistor
• Sampled prior to every start up to detect if Adaptive Loop load line is active or inactive
• Leave open to disable Adaptive Loop load line
• Not used in Remote Sense operation
Signal Type
Analog Input
State
Start up
Normal
Operation
Attribute
AL Enable Threshold
AL Disable Threshold
Minimum AL Disable
Resistance
AL Capacitance
(External)
AL Sample Delay
Internally generated
VCC
Internal Pullup
Resistance to V_{CC_INT}
AL Pin Analog Range
AL Gain
AL Load Line Accuracy
Symbol
V_{AL_EN}
V_{AL_DIS}
R_{AL_DIS_MIN}
C_{AL_EXT}
t_{ENABLE_AL}
V_{CC_INT}
R_{AL_INT}
V_{AL_RANGE}
G_AL
%_{ACC_LL_AL}
AL load line resolution
Maximum output referred
compensation
AL Latency
AL Bandwidth
LL_{AL_RES}
V_{OUT_AL_MAX}
t_{AL_LAT}
BW_AL
Conditions / Notes
Min
Pull below this value during start up to enable AL load line
Pull above this value to disable AL load line
3.20
Minimum AL resistance required to disable AL load line
10
From ENABLE high to AL sampled
100
3.20
0.5 % tolerance resistor
9.83
0
Positive correction slope, VT inactive
Full load slope accuracy exclusive of external resistor
tolerance
Maximum increase from no load setpoint, V_OUT ≤ 55V
60
-3dB point
Typ
140
3.28
10
0.5
0.5
3
120
1.2
Max
Unit
3.10
V
V
MΩ
100
pF
200
µs
3.36
V
10.18
kΩ
3.10
V
Ω/V
2
%
mΩ
5
V
240
s
kHz
VT: VTM TEMPERATURE (ADAPTIVE LOOP OPERATION ONLY)
• VTM temperature compensation for Adaptive Loop regulation
• Adjusts the slope of the Adaptive Loop load line to account for changes in VTM output resistance over temperature
• Connect to TM pin of compatible downstream VTM to enable temperature compensation
• Leave disconnected to disable temperature compensation
Signal Type
State
Attribute
Internal Resistance to
SGND
VT Enable Threshold
VT Disable Threshold
VT Disable Default
Temperature
Symbol
R_{VT_INT}
V_{VT_EN}
V_{VT_DIS}
T_{VT_DIS}
Conditions / Notes
Pull below this value to disable VT
temperature compensation
Default AL temperature setting when VT
disabled
Min
Typ
Max
Unit
80
kΩ
2.1
V
1.9
V
25
°C
Analog Input
Normal VT analog range
Operation
VT Temperature
Coefficient
VT Resolution
VT Latency
Bandwidth
V_{VT_OP}
2.18
3.98
V
TC_VT
VT within active range, referenced to 2.98V
30
%/V
TC_VT
VTM TM voltage applied, .01V/°K, referenced
to 25C
0.3
%/C
TC_{VT_RES}
t_{VT_LAT}
BW_VT
VTM TM voltage applied, .01V/°K
-3dB point
0.4
°C
60
120
240
s
1.5
kHz
- 11 -
Rev. 1.0
11/2012