XRP7724 Datasheet, PDF (4/29 Pages) Exar Corporation – Quad Channel Digital PWM/PFM Programmable Power Management System

XRP7724
Quad Channel Digital PWM/PFM
Programmable Power Management System
CURRENT AND AUX ADC (MONITORING ADCS)
Parameter
Current Sense Accuracy
Current Sense ADC INL
DNL
Current Limit Set Point
Resolution and Current
Sense ADC Resolution
Current Sense ADC Range
VOUT ADC Resolution
VOUT ADC Accuracy
VCC ADC Range
UVLO WARN SET
UVLO WARN CLEAR
UVLO FAULT SET (Note 4)
VCC ADC Resolution
VCC ADC Accuracy
Die Temp ADC Resolution
Die Temp ADC Range
Min.
-3.75
-10
-5
-12.5
-120
-280
-1
4.6
4.4
4.4
4.2
-1
-44
Typ.
±1.25
±2.5
+/-0.4
0.27
1.25
2.5
15
30
60
200
5
Max.
3.75
10
5
+12.5
20
40
1
25
4.72
4.72
4.55
1
156
Units
mV
mV
mV
mV
LSB
mV
mV
mV
mV
LSB
V
V
V
V
mV
LSB
°C
°C
Conditions
Low Range (≤120mV) Note 2
• -60mV applied
High Range (≤280mV)
• -150mV
Low Range (≤120mV)
High Range (≤280mV)
Low Range (≤120mV)
High Range (≤280mV)
Low Range
Mid Range
High Range
Note 3
UVLO WARN set point 4.6V, VCC=LDO5
UVLO WARN set point 4.6V, VCC=LDO5
UVLO FAULT set point 4.4V, VCC=LDO5
Vin <= 20V
Output value is in Kelvin
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
LDO5 Output Voltage
Min.
4.85
LDO5 Current Limit
LDO5 UVLO
LDO5 PGOOD Hysteresis
LDO5 Bypass Switch Resistance
Bypass Switch Activation
Threshold
Bypass Switch Activation
Hysteresis
LDO3_3 Output Voltage
LDO3_3 Current Limit
Maximum total LDO loading
during ENABLE start-up
135
4.74
2.5
3.15
53
Typ.
5.0
155
375
1.1
150
3.3
Max.
5.15
180
1.5
2.5
3.45
85
30
Units
V
mA
V
mV
Ω
%
mV
V
mA
mA
Conditions
5.5V ≤ VCC ≤ 25V
• 0mA < I_LDO5OUT < 130mA, LDO3_3 Off
• LDO5 Fault Set
• VCC Rising
VCC Falling
• V5EXT Rising, % of threshold setting
V5EXT Falling
•
4.6V ≤ LDO5 ≤ 5.5V
0mA < ILDO3_3OUT < 50mA
• LDO3_3 Fault Set
ENABLE transition from logic low to
high. Once LDO5 in regulation above
limits apply.
© 2012 Exar Corporation
4/29
Rev. 1.0.1