23
6201C–PMAAC–31-Jul-07
AT73C239
13.5 High Performance Bandgap (HPBG)
13.6 Low Power Bandgap (LPBG)
13.7 Power On Reset on VBAT (POR1)
13.8 Power On Reset on VDD3 (POR2)
Table 13-14. HPBG Parametric Table
Symbol Parameter Conditions Min Typ Max Units
V
BG
Output voltage Factory trimmed 1.231 V
I
SC
Shutdown current encore = en = 0, dcrun = 0 (1) 1 6 µA
I
QC
Quiescent current 30 µA
t
S
Startup time C
F
= 100 nF 1 2 ms
V
N
Output noise BW 10 Hz to 100 kHz 7 µV
RMS
PSRR Power Supply Rejection Ratio F = 100 Hz 65 dB
Table 13-15. External Components
Schematic Reference Description
C
F
X5R 100 nF ± 20% ceramic capacitor minimum
Table 13-16. LPBG 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 4 7.5 µA
t
S
Startup time 100 µs
V
LPBG
Bandgap Voltage 1.15 1.2 1.25 V
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
Table 13-18. POR2 Parametric Table
Symbol Parameter Conditions Min Typ Max Unit
V
DD3
Operating supply voltage Switching regulated 0 3.6 V
I
QC
Quiescent current 3 µA
V
PON
POR2 on threshold 1.45 V
V
POFF
POR1 off threshold 1.5 V
