XRP7724
Quad Channel Digital PWM/PFM
Programmable Power Management System
CURRENT AND AUX ADC (MONITORING ADCS)
Parameter
Min.
Typ.
Max.
Units
Conditions
±1.25
3.75
10
5
mV
mV
mV
mV
LSB
-3.75
-10
-5
Low Range (≤120mV) Note 2
-60mV applied
•
•
Current Sense Accuracy
±2.5
High Range (≤280mV)
-150mV
+12.5
-12.5
Current Sense ADC INL
DNL
+/-0.4
0.27
Current Limit Set Point
Resolution and Current
Sense ADC Resolution
1.25
mV
mV
mV
Low Range (≤120mV)
2.5
High Range (≤280mV)
20
40
Low Range (≤120mV)
-120
-280
Current Sense ADC Range
High Range (≤280mV)
15
30
60
Low Range
Mid Range
High Range
VOUT ADC Resolution
mV
VOUT ADC Accuracy
VCC ADC Range
1
LSB
V
-1
25
Note 3
4.6
UVLO WARN SET
4.72
4.72
4.55
V
V
UVLO WARN set point 4.6V, VCC=LDO5
UVLO WARN set point 4.6V, VCC=LDO5
UVLO FAULT set point 4.4V, VCC=LDO5
4.4
4.4
4.2
UVLO WARN CLEAR
UVLO FAULT SET (Note 4)
VCC ADC Resolution
VCC ADC Accuracy
V
200
5
mV
LSB
°C
°C
1
Vin <= 20V
-1
Die Temp ADC Resolution
Die Temp ADC Range
156
Output value is in Kelvin
-44
Note 2: Final test limits are ±2.5mV or ±2 LSB
Note 3: Although Range of VCC ADC is technically 0V to 25V, below 4.55 the LDO5 hardware UVLO may have tripped.
Note 4: This test ensures an UVLO FAULT flag will be given before the LDO5 hardware UVLO trips.
LINEAR REGULATORS
Parameter
Min.
Typ.
Max.
Units
Conditions
5.5V ≤ VCC ≤ 25V
0mA < ILDO5OUT < 130mA, LDO3_3 Off
LDO5 Output Voltage
5.0
5.15
V
4.85
•
•
•
LDO5 Current Limit
155
180
mA
V
LDO5 Fault Set
VCC Rising
135
LDO5 UVLO
4.74
LDO5 PGOOD Hysteresis
LDO5 Bypass Switch Resistance
375
1.1
mV
Ω
VCC Falling
1.5
2.5
Bypass Switch Activation
Threshold
•
%
V5EXT Rising, % of threshold setting
V5EXT Falling
2.5
Bypass Switch Activation
Hysteresis
150
3.3
mV
4.6V ≤ LDO5 ≤ 5.5V
0mA < ILDO3_3OUT < 50mA
•
•
LDO3_3 Output Voltage
LDO3_3 Current Limit
3.45
85
V
3.15
53
mA
LDO3_3 Fault Set
ENABLE transition from logic low to
high. Once LDO5 in regulation above
limits apply.
Maximum total LDO loading
during ENABLE start-up
30
mA
© 2012 Exar Corporation
4/29
Rev. 1.0.1
EXAR [ EXAR CORPORATION ]
