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AS1322
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
T AMB = -40 to +85oC, V IN = +1.2V, V OUT = +3.3V, V SHDNN = +1.2V (unless otherwise specified). Typ values @ T AMB = +25oC.
Table 4. Electrical Characteristics
Symbol
Parameter
Minimum Start-Up Voltage
Minimum Operating Voltage
Output Voltage Adjust Range
Conditions
I LOAD = 1mA
SHDNN = V IN
T AMB = 25oC
1
Min
2.5
Typ
0.85
0.65
Max
1
0.85
5
Units
V
V
V
V FB = 1.4V , AS1322B only
V FB
I FB
I QPWS
I QSHDNN
I Q
I NMOSSWL
I PMOSSWL
R ONNMOS
R ONPMOS
I NMOS
I PS
f SW
Feedback Voltage
Feedback Input Current
Quiescent Current
(Powersave Operation)
Quiescent Current (Shutdown)
Quiescent Current (Active)
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
NMOS Current Limit
Powersave Operation Current
Threshold
Max Duty Cycle
Switching Frequency
T AMB = T MIN to T MAX
2
V FB = 1.25V
3
V FB = 1.4V , AS1322A only
V SHDNN = 0V
3
V SW = 5V
V SW = 0V
V OUT = 3.3V
V OUT = 5V
V OUT = 3.3V
V OUT = 5V
V IN = 2.5V
2
AS1322A only
V FB = 1V, T AMB = T MIN to T MAX
T AMB = 25oC
T AMB = T MIN to T MAX
1.192
80
0.95
0.85
1.23
1
30
0.01
150
0.1
0.1
0.35
0.20
0.45
0.30
850
3
87
1.2
1.2
1.268
50
1
300
5
5
0.8
0.7
0.8
0.7
1.5
1.5
V
nA
μA
μA
μA
μA
μA
?
?
mA
mA
%
MHz
V SHDNNH
V SHDNNL
SHDNN Input High
SHDNN Input Low
1
0.35
V
V
I SHDNN
SHDNN Input Current
V SHDNN = 5.0V
0.01
1
μA
1. Minimum V IN operation after start-up is only limited by the battery’s ability to provide the necessary power as it enters a deeply dis-
charged state.
2. Specification is guaranteed by design and not 100% production tested.
3. I QPWS is measured at V OUT . Multiply this value by V OUT /V IN to get the equivalent input (battery) current.
Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality
Control) methods.
www.ams.com/DC-DC_Step-Up/AS1322
Revision 1.10
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