7 ldo4 – Rainbow Electronics AT73C246 User Manual
Page 18
18
11050A–PMAAC–07-Apr-10
AT73C246
9.7
LDO4
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
IN4
without load.
2. Default output voltage are set during manufacturing. Please contact Atmel for other default settings.
3. V
DROPOUT
= V
IN4
- V
DD4
when V
DD4
= 98% of V
DD4
obtained with V
IN4
> V
DD4
+ 300mV
Table 9-8.
LDO4 Electrical Characteristics
Symbol
Parameter
Comments
Min
Typ
Max
Units
V
IN
Operating Supply Voltage
V
IN4
2.9
3.6
5.5
V
I
DD
Supply Current
OFF
-
-
1
µA
ON
-
-
350
µA
I
O
Output Current
V
IN4
> V
DD4
+ 300mV.
-
-
200
mA
V
DD4
Default Output Voltage
-
3.3
-
V
V
DD_RANGE
Programmable Output Voltage
Range
2.7
3.6
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
IN4
> V
DD4
+ 300mV
T
J
= 25°C ; I
O
= 0 mA
-1
1
%
V
IN4
> V
DD4
+ 300mV
T
J
= [-40°C ; 125°C] ; I
O
= 0 mA
-1.5
1.5
Δ
VDD_IL
Static Load Regulation
V
IN4
> V
DD4
+ 300mV
I
O
ranging from 0 to I
OMAX
0.05
0.5
%.V
DD4
Dynamic Load Regulation
V
IN4
> V
DD4
+ 300mV
I
O:
0 to I
OMAX
; 1
μs rise time
-40
mV
V
IN4
> V
DD4
+ 300mV
I
O:
I
OMAX
to 0 ; 1
μs fall time
40
Δ
VDD_VIN
Static Line Regulation
V
IN4
> V
DD4
+ 300mV. I
O
= 0 mA
V
IN4
from 2.9 to 5.5V
5
mV
V
DROPOUT
Drop Out Voltage
I
O
= 10mA
50
mV
I
O
= 200mA
250
mV
PSRR
Power Supply Rejection Ratio
V
IN4
> V
DD4
+ 300mV
I
O
= 1mA. DC to 3kHz.
60
dB
V
IN4
> V
DD4
+ 300mV
I
O
= 10mA. DC to 3kHz.
50
I
INRUSH
Inrush Current
Current from V
IN4
from 0 to 95%
of final value.
200
500
mA
T
START
Start-up Time
V
DD4
OFF and rising to 95% of
final value. I
O
= 0 mA
1
ms