XR77128 Datasheet, PDF (4/28 Pages) Exar Corporation – Quad Output Digital PWM/PFM

XR77128
Symbol
Parameter
Conditions
Min
Typ
Max
Current and AUX ADC (Monitoring ADCs)
V_{A_CS}
Current Sense Accuracy
Low Range (≤120mV), -60mV applied
-2.5 ±1.25
2.5

-6.25
6.25
High Range (≤280mV), 150mV applied
-5
±2.5
5

-12.5
12.5
INL_CS
Current Sense ADC INL
±0.4
DNL_CS
Current Sense DNL
±0.4
V_{SET_CS} Current Limit Set Point Resolution
Low Range (≤120mV)
1.25
and Current Sense ADC Resolution
High Range (≤280mV)
2.5
V_CS
Current Sense ADC Range
Low Range (≤120mV)
High Range (≤280mV)
-120
20
-280
40
V_{ADC_VO} VOUT ADC Resolution
Low Range
15
Mid Range
30
High Range
60
LSB_ADC VOUT ADC Accuracy
-1
1
V_ADC
VCC ADC Range
4.6
25
V_{R_ADC} VCC ADC Resolution
200
V_{A_ADC}
VCC ADC Accuracy
VCC ≤ 20V
-1
1
T_{R_ADC} Die Temp ADC Resolution
5
T_ADC
Die Temp ADC Range
Output value is in Kelvin
-44
156
Linear Regulators
V_{O_LDO5} LDO5 Output Voltage
5.5V ≤ VCC ≤ 25V
0mA < I_LDO5OUT < 130mA, LDOOUT off

4.85
5.0
5.15
I_{CL_LDO5}
LDO5 Current Limit
LDO5 UVLO
LDO5 Fault Set
VCC Rising

135
155
180

4.6
LDO5 PGOOD Hysteresis
VCC Falling
375
LDO5 Bypass Switch Resistance
1.1
1.5
Bypass Switch Activation Threshold V5EXT Rising, % of threshold setting

2.5
2.5
Bypass Switch Activation Hysteresis V5EXT Falling
150
LDOOUT Output Voltage
4.6V ≤ LDO5 ≤ 5.5V
0mA < I_LDOOUT < 50mA
LDOOUT set to 3.3V

3.15
3.3
3.45
LDOOUT Current Limit
LDOOUT Fault Set, LDOOUT set to 3.3V

50
85
Maximum total LDO loading during
ENABLE transition from logic low to high.
75
ENABLE start-up
Once LDO5 in regulation, above limits
apply.
Units
mV
mV
mV
mV
LSB
LSB
mV
mV
mV
mV
mV
mV
mV
LSB
V
mV
LSB
°C
°C
V
mA
V
mV
Ω
%
mV
V
mA
mA
© 2014 Exar Corporation
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exar.com/XR77128
Rev 1A