PRM48BF480T500A00 Datasheet, PDF (10/45 Pages) Vicor Corporation – PRM™ Regulator

• All control signals must be referenced to this pin, with the exception of VC
• SGND is internally connected to –IN and –OUT
Signal Type
Analog Input / Output
State
Any
Attribute
Maximum Allowable
Current
PRM48B x 480 y 500A00
SGND: SIGNAL GROUND
Symbol
I_SGND
Conditions / Notes
Min
Typ
Max
Unit
-100
100
mA
TRIM
• TRIM is used to select operating mode and trim the output voltage in Adaptive Loop operation
• Internal pullup to V_{CC_INT} through10kΩ resistor
• When pulled below 0.45V during power up, Remote Sense / Slave operation is selected
• When allowed to pull up above 0.55 during power up, Adaptive Loop operation is selected
• Operating mode is latched during power up and cannot be changed unless input power is cycled
Signal Type
Analog Input
State
Normal
Operation
Attribute
Internally generated
VCC
Internal Pullup
Resistance to V_{CC_INT}
Mode Detection Delay
Symbol
V_{CC_INT}
R_{TRIM_INT}
t_{MODE_DETECT}
Conditions / Notes
0.5% tolerance resistor
From ENABLE high to mode detected, after V_IN first
applied
Mode Detect
Remote Sense Enable
Threshold
V_{RS_MODE_EN}
Pull below this value during application of power to enable
Remote Sense / Slave operation
Remote Sense Disable
Threshold
V_{RS_MODE_DIS}
Pull above this value during application of power to enable
Adaptive Loop operation
TRIM (ADAPTIVE LOOP OPERATION ONLY)
• Provides dynamic trim control over the PRM output voltage in Adaptive Loop operation
• Sampled prior to every start up to detect if trim is active or inactive
• Output voltage is equal to 20 times the voltage at the TRIM pin when applied TRIM voltage is within the active range
• Trim state is latched during normal operation and cannot be changed until start up is initiated
Signal Type
Analog Input
State
Start up
Normal
Operation
Attribute
Trim Enable Threshold
Trim Disable Threshold
Minimum Trim Disable
Resistance
Trim Capacitance
(External)
Trim Sample Delay
TRIM Pin Analog Range
TRIM Gain
Trim Accuracy
V_OUT referred trim
resolution
Trim latency
Trim Bandwidth
Symbol
V_{TRIM_EN}
V_{TRIM_DIS}
R_{TRIM_DIS_MIN}
C_{TRIM_EXT}
t_{ENABLE_TRIM}
V_{TRIM_RANGE}
G_TRIM
%_{ACC_TRIM}
V_{OUT_RES}
t_{TRIM_LAT}
BW_TRIM
Conditions / Notes
Pull below this value during start up to enable trim control
Pull above this value during start up to disable trim control
Minimum TRIM resistance required to disable trim
From ENABLE high to TRIM sampled
See Figure 26
V_OUT / V_TRIM, V_TRIM applied within active range
Vout accuracy, exclusive of external resistor tolerance
-3dB point
Min
3.20
9.83
100
0.55
Min
3.20
10
100
1.00
60
Typ
Max
Unit
3.28
3.36
V
10
10.18
kΩ
140
200
µs
0.45
V
V
Typ
Max
Unit
3.10
V
V
MΩ
100
pF
140
200
µs
2.75
20
V/V
0.5
2
%
200
mV
120
240
s
1.2
kHz
- 10 -
Rev. 1.0
11/2012