5 ldo2 – Rainbow Electronics AT73C246 User Manual
Page 16
16
11050A–PMAAC–07-Apr-10
AT73C246
9.5
LDO2
Unless otherwise specified: External components C
OUT
=10
µ
F, C
IN
=10
μF, T
J
= [-40°C ; +125°C].
Notes: 1. Current consumption in V
IN2
without load.
2. Default output voltage are set during manufacturing. Please contact Atmel for other default settings.
3. Threshold level is programmed in register PMU_RST_LVL (0x04)
4. V
DROPOUT
= V
IN2
- V
DD2
when V
DD2
= 98% of V
DD2
obtained with V
IN2
> V
DD2
+ 500mV
Table 9-6.
LDO2 Electrical Characteristics
Symbol
Parameter
Comments
Min
Typ
Max
Units
V
IN
Operating Supply Voltage
V
IN2
1.65
1.8
3.6
V
I
DD
Supply Current
OFF
-
-
1
µA
ON
-
-
250
µA
I
O
Output Current
V
IN2
> V
DD2
+ 500mV.
-
-
300
mA
V
DD2
Default Output Voltage
-
1
-
V
V
DD_RANGE
Programmable Output Voltage
Range
0.8
1.35
V
V
DD_STEP
Output Voltage Steps
50
mV
T
STEP
Step time
With automatic ramping.
570
600
630
µs
V
DD_ACC
DC Output Voltage Accuracy
V
IN2
> V
DD2
+ 500mV
T
J
= 25°C ; I
O
= 0 mA
-1
1
%
V
IN2
> V
DD2
+ 500mV
T
J
= [-40°C ; 125°C] ; I
O
= 0 mA
-1.5
1.5
Δ
VDD_IL
Static Load Regulation
V
IN2
> V
DD2
+ 500mV
I
O
ranging from 0 to I
OMAX
0.05
1
%.V
DD2
Dynamic Load Regulation
V
IN2
> V
DD2
+ 500mV
I
O:
0 to I
OMAX
; 1
μs rise time
-50
mV
V
IN2
> V
DD2
+ 500mV
I
O:
I
OMAX
to 0 ; 1
μs fall time
50
Δ
VDD_VIN
Static Line Regulation
I
O
= 0 mA
V
IN2
from 1.65 to 3.6V
5
mV
V
DROPOUT
Drop Out Voltage
I
O
= 200mA
300
mV
I
O
= 300mA
450
mV
I
INRUSH
Inrush Current
Current from V
IN2
from 0 to 95% of
final value.
200
500
mA
T
START
Start-up Time
V
DD2
OFF and rising to 95% of
final value. I
O
= 0 mA
1
ms
PWRF
DET
Power Fail Detector Threshold
Accuracy
Overload of the programmed
threshold by 10mV / 5us min
-1
-
+1
%.V
DD2