PRM48BH480T250A00 Datasheet, PDF (10/44 Pages) Vicor Corporation – PRM™ Regulator

PRM48BH480 X 250A00
• 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
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
Mode Detect
Attribute
Internally generated
VCC
Internal Pullup
Resistance to V_{CC_INT}
Mode Detection Delay
Remote Sense Enable
Threshold
Symbol
V_{CC_INT}
R_{TRIM_INT}
t_{MODE_DETECT}
V_{RS_MODE_EN}
Conditions / Notes
Min
3.20
0.5% tolerance resistor
9.83
From ENABLE high to mode detected, after V_IN first applied
100
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
0.55
TRIM (ADAPTIVE LOOP OPERATION ONLY)
Typ
3.28
10
140
Max
Unit
3.36
V
10.18
kΩ
200
µs
0.45
V
V
• Provides dynamic trim control over the PRM output voltage in Adaptive Loop operation
• Sampled prior to every startup 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 startup is initiated
Signal Type
Analog Input
State
Attribute
Symbol
Conditions / Notes
Min
Typ
Trim Enable Threshold
V_{TRIM_EN}
Pull below this value during startup to enable trim control
Startup
Trim Disable Threshold
Minimum Trim Disable
Resistance
Trim Capacitance
(External)
V_{TRIM_DIS}
R_{TRIM_DIS_MIN}
C_{TRIM_EXT}
Pull above this value during startup to disable trim control
Minimum TRIM resistance required to disable trim
3.20
10
Trim Sample Delay
t_{ENABLE_TRIM}
From ENABLE high to TRIM sampled
100
140
TRIM Pin Analog Range
V_{TRIM_RANGE}
See Figure 26
1.00
TRIM Gain
G_TRIM
V_OUT / V_TRIM, V_TRIM applied within active range
20
Normal
Trim Accuracy
%_{ACC_TRIM}
Vout accuracy, exclusive of external resistor tolerance
0.5
Operation
V_OUT referred trim
resolution
V_{OUT_RES}
200
Trim latency
Trim Bandwidth
t_{TRIM_LAT}
BW_TRIM
-3dB point
60
120
1.2
Max
Unit
3.10
V
V
MΩ
100
pF
200
µs
2.75
V/V
2
%
mV
240
s
kHz
- 10 -
Rev. 1.0
11/2012