AS1337
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
V
IN
= V
EN
= +1.2V, V
OUT
= +3.3V, Typ values @ T
AMB
= +25ºC, T
AMB
= -40 to +85ºC (unless otherwise specified);
Table 3. Electrical Characteristics
Symbol
Input
Minimum Start-Up Voltage
Minimum Operating Voltage
V
IN
Maximum Input Voltage
Output Voltage Adjust Range
Regulation
V
FB
I
FB
Feedback Voltage
Feedback Input Current
V
FB
= 1.25V
2
Parameter
Conditions
I
LOAD
= 1mA
EN = V
IN
1
Min
Typ
Max
Units
0.85
0.65
1.15
0.85
4.5
V
V
V
V
2.5
5
1.192
1.23
1
1.268
V
nA
Operating Current
I
QPWS
I
SHDN
Switches
I
NMOSSWL
NMOS Switch Leakage
R
ONNMOS
NMOS Switch On Resistance
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 5V
0.01
0.35
0.20
0.45
0.30
850
V
FB
= 1V
80
0.95
87
1.2
1.5
1
µA
Ω
Ω
mA
%
MHz
Quiescent Current
Shutdown Current
V
FB
= 1.4V
20
0.01
35
1
µA
µA
EN = GND, V
IN
= 3.3V
R
ONPMOS
PMOS Switch On Resistance
I
NMOS
NMOS Current Limit
Max Duty Cycle
f
SW
Shutdown
V
IH
V
IL
I
EN
Power-OK
POK Voltage Low
POK Leakage Current
Power-OK Threshold
Thermal Protection
T
ENM
ΔT
ENM
Overtemperature Protection
Overtemperature Protection
Hysteresis
EN Input Current
Enable Input Threshold
Switching Frequency
1
0.3
EN = 5.0V
0.01
1
V
µA
I
POK
=1mA
V
POK
= V
IN
or V
OUT
Falling Edge
86
0.1
1
88
0.4
100
91
V
nA
%
145
10
ºC
ºC
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 discharged state.
2. I
QPWS
is measured at V
OUT
. Multiply this value by V
OUT
/V
IN
to get the equivalent input (battery) current.
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