AS1322 Просмотр технического описания (PDF) - austriamicrosystems AG
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AS1322 Datasheet PDF : 17 Pages
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AS1322
Data Sheet
austriamicrosystems
Pin Descriptions
6 Electrical Characteristics
TAMB = -40 to +85ºC, VIN = +1.2V, VOUT = +3.3, VSHDNN = +1.2V (unless otherwise specified). Typ values @ TAMB = +25ºC.
Table 4. Electrical Characteristics
Symbol
Parameter
Conditions
Min Typ Max Units
Minimum Start-Up Voltage
ILOAD = 1mA
0.85
1
V
Minimum Operating Voltage
SHDNN = VIN 1
0.66 0.85
V
Output Voltage Adjust Range
TAMB = 25ºC
2.5
5
V
VFB
Feedback Voltage
TAMB = TMIN to TMAX
1.192 1.23 1.268 V
IFB
Feedback Input Current
VFB = 1.25V 2
1
nA
IQPWS
Quiescent Current
(Powersave Operation)
VFB = 1.4V 3, AS1322A only
30
50
µA
IQSHDNN Quiescent Current (Shutdown)
VSHDNN = 0V
0.01
1
µA
IQ
Quiescent Current (Active)
VFB = 1.4V 3 , AS1322B only
150 300
µA
INMOSSWL
NMOS Switch Leakage
VSW = 5V
0.1
5
µA
IPMOSSWL
PMOS Switch Leakage
VSW = 0V
0.1
5
µA
RONNMOS NMOS Switch On Resistance
VOUT = 3.3V
VOUT = 5V
0.35 0.8
Ω
0.20 0.7
RONPMOS PMOS Switch On Resistance
VOUT = 3.3V
VOUT = 5V
0.45 0.8
Ω
0.30 0.7
INMOS
NMOS Current Limit
VIN = 2.5V
850
mA
IPS
Powersave Operation Current
Threshold
AS1322A only 2
3
mA
Max Duty Cycle
VFB = 1V, TAMB = TMIN to TMAX
80
87
%
fSW
Switching Frequency
TAMB = 25ºC
TAMB = TMIN to TMAX
0.95 1.2
0.85 1.2
1.5
MHz
1.5
VSHDNNH
SHDNN Input High
1
V
VSHDNNL
SHDNN Input Low
0.35
V
ISHDNN
SHDNN Input Current
VSHDNN = 5.0V
0.01
1
µA
1. Minimum VIN operation after start-up is only limited by the battery’s ability to provide the necessary power as it
enters a deeply discharged state.
2. Specification is guaranteed by design and not 100% production tested.
3. IQPWS is measured at VOUT. Multiply this value by VOUT/VIN to get the equivalent input (battery) current.
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Revision 1.03
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