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AS1322 数据表(PDF) 4 Page - ams AG

部件名 AS1322
功能描述  Low Voltage, Micropower, DC-DC Step-Up Converters
PDF  17 Pages
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制造商  AMSCO [ams AG]
网页  http://www.ams.com
标志 AMSCO - ams AG

AS1322 数据表(HTML) 4 Page - ams AG

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www.austriamicrosystems.com
Revision 1.07
4 - 17
AS1322
Data Sheet - El ectrical Characte ristics
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
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.
0.65
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
2. Specification is guaranteed by design and not 100% production tested.
1
nA
IQPWS
Quiescent Current
(Powersave Operation)
VFB = 1.4V
3
, AS1322A only
3. IQPWS is measured at VOUT. Multiply this value by VOUT/VIN to get the equivalent input (battery) current.
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
0.35
0.8
Ω
VOUT = 5V
0.20
0.7
RONPMOS
PMOS Switch On Resistance
VOUT = 3.3V
0.45
0.8
Ω
VOUT = 5V
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
0.95
1.2
1.5
MHz
TAMB = TMIN to TMAX
0.85
1.2
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



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