AAT3216 ETC, AAT3216 Datasheet - Page 12

• Manufacturer Part Number: AAT3216
• Description: 150mA MicroPower LDO with PowerOK
• Manufacturer: ETC

must be operated in a duty cycled mode. Refer to
the following calculation for duty cycle operation:
P
I
I
V
V
%DC=100(P
%DC=100(211mW/((4.2V-2.5V)150mA+(4.2Vx150µA))
%DC = 85.54%
For a 150mA output current and a 2.7volt drop
across the AAT3216 at an ambient temperature of
85°C, the maximum on time duty cycle for the
device would be 85.54%.
The following family of curves show the safe oper-
ating area for duty cycled operation from ambient
room temperature to the maximum operating level.
12
GND
OUT
D(MAX)
IN
OUT
= 4.2 volts
= 150mA
= 150µA
= 2.5 volt
is assumed to be 211mW
D(MAX)
/((V
IN
-V
OUT
)I
OUT
+(V
IN
xI
GND
))
150mA MicroPower™ LDO with PowerOK
3.5
2.5
1.5
0.5
3.5
2.5
1.5
0.5
3.5
2.5
1.5
0.5
2
3
1
0
3
2
3
2
1
0
1
0
0
0
0
10
10
10
Device Duty Cycle vs. V
Device Duty Cycle vs. V
Device Duty Cycle vs. V
20
20
20
V
V
V
OUT
OUT
OUT
30
30
30
200mA
= 2.5V @ 85 C
= 2.5V @ 50 C
= 2.5V @ 25 C
Duty Cycle (%)
Duty Cycle (%)
Duty Cycle (%)
40
40
40
50
50
50
150mA
60
60
60
200mA
AAT3216
70
70
70
DROP
3216.2004.01.0.94
DROP
200mA
DROP
80
80
80
150mA
100mA
90
90
90
100
100
100