AT73C202
Backup Battery LDO
T AMB = -20°C to 85°C, V BAT = 3V to 4.2V unless otherwise specified.
(V-BCK)
Table 12. Backup Battery LDO (V-BCK) (1) Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V OUT
V OUT
(1)
(1)
Output Voltage
Output Voltage
BB1 = 0
BB1 = 1
2.4
2.65
2.45
2.7
2.50
2.75
V
V
I OUT
(1)
Output Current
2
5
mA
V DROP
Dropout Voltage
50
mV
I QC
PSRR
T R
Quiescent Current
Ripple Rejection
Rise Time
4.8
110
6.6
40
9.7
320
μA
dB
μs
Note:
1. V OUT and I OUT refer to V-BCK.
Table 13. Backup Battery LDO (V-BCK) External Components
Symbol
C OUT
C ESR
Parameter
Output Capacitor Value
Output Capacitor ESR
Conditions
100 KHz
Min
1.98
Typ
2.2
Max
2.42
100
Unit
μF
m ?
RTC LDO
T AMB = -20°C to 85°C, V BAT = 3V to 4.2V unless otherwise specified.
(V-RTC)
Table 14. RTC LDO ( V-RTC ) (1) Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V OUT
(1)
Output Voltage
BB1 = 0
1.45
1.50
1.55
V
BB1 = 1 (not used)
I OUT
(1)
Output Current
0.5
mA
V DROP
Dropout Voltage
50
mV
I QC
I SD
PSRR
T R
Quiescent Current
Shutdown Current
Ripple Rejection
Rise time
4.8
110
6.6
0.1
40
9.7
1
320
μA
μA
dB
μs
Note:
1. V OUT and I OUT refer to V-RTC
Table 15. RTC LDO ( V-RTC ) External Components
Symbol
C OUT
C ESR
Parameter
Output Capacitor Value
Output Capacitor ESR
Conditions
100 KHz
Min
198
Typ
220
Max
242
100
Unit
nF
m ?
13
2740B–PMGMT–05/03
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