AT73C239_14 Datasheet, PDF (23/31 Pages) ATMEL Corporation – Independent 2.5V to 3.6V Auxiliary Supply for Backup Section

AT73C239
13.5 High Performance Bandgap (HPBG)
Table 13-14. HPBG Parametric Table
Symbol
Parameter
Conditions
Min
V_BG
I_SC
I_QC
t_S
V_N
PSRR
Output voltage
Shutdown current
Quiescent current
Startup time
Output noise
Power Supply Rejection Ratio
Factory trimmed
encore = en = 0, dcrun = 0 (1)
C_F= 100 nF
BW 10 Hz to 100 kHz
F = 100 Hz
Typ
1.231
1
1
7
65
Max
6
30
2
Units
V
µA
µA
ms
µV_RMS
dB
Table 13-15. External Components
Schematic Reference
C_F
13.6 Low Power Bandgap (LPBG)
Description
X5R 100 nF ± 20% ceramic capacitor minimum
Table 13-16. LPBG Parametric Table
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V_BAT
I_QC
t_S
V_LPBG
Operating supply voltage
Quiescent current
Startup time
Bandgap Voltage
Backup Battery or Supercap
2.5
3.6
V
4
7.5
µA
100
µs
1.15
1.2
1.25
V
13.7 Power On Reset on VBAT (POR1)
Table 13-17. POR1 Parametric Table
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V_BAT
Operating supply voltage
Backup Battery or Supercap
2.5
3.6
V
I_QC
Quiescent current
3
µA
V_PON
POR1 on threshold
1.45
V
V_POFF
POR1 off threshold
1.5
V
13.8 Power On Reset on VDD3 (POR2)
Table 13-18. POR2 Parametric Table
Symbol
Parameter
V_DD3
I_QC
V_PON
V_POFF
Operating supply voltage
Quiescent current
POR2 on threshold
POR1 off threshold
Conditions
Switching regulated
Min
Typ
Max
Unit
0
3.6
V
3
µA
1.45
V
1.5
V
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6201C–PMAAC–31-Jul-07