Atmel SAM4S Series, Preliminary Data Sheet

Page: 1096 / 1163

1096
11100B–ATARM–31-Jul-12
SAM4S Series [Preliminary]
Notes: 1. A 10µF or higher ceramic capacitor must be connected between VDDIN and the closest GND pin of the device.
This large decoupling capacitor is mandatory to reduce startup current, improving transient response and noise rejection.
2. To ensure stability, an external 2.2µF output capacitor, CD
OUT
must be connected between the VDDOUT and the closest
GND pin of the device. The ESR (Equivalent Series Resistance) of the capacitor must be in the range 0.1 to 10 ohms.
Solid tantalum, and multilayer ceramic capacitors are all suitable as output capacitor.
A 100nF bypass capacitor between VDDOUT and the closest GND pin of the device helps decreasing output noise and
improves the load transient response.
3. Defined as the current needed to charge external bypass/decoupling capacitor network.
4. At power-up VDDIO needs to reach 0.6V before VDDIN reaches 1.0V
5. VDDIO voltage needs to be equal or below to (VDDIN v0.5V)
Table 42-3. 1.2V Voltage Regulator Characteristics
Symbol Parameter Conditions Min Typ Max Units
V
VDDIN
DC Input Voltage Range
(4) (5)
1.6 3.3 3.6 V
V
VDDOUT
DC Output Voltage
Normal Mode
Standby Mode
1.2
0
V
V
ACCURACY
Output Voltage Accuracy I
Load
= 0.8mA to 80 mA (after trimming) -3 3 %
I
LOAD
I
LOAD-START
Maximum DC Output
Current
Maximum Peak Current
during startup
V
VDDIN
> 1.8V
V
VDDIN
≤
1.8V
80
40
mA
See Note
(3)
. 400 mA
D
DROPOUT
Dropout Voltage V
VDDIN
= 1.6V, I
Load
= Max 400 mV
V
LINE
V
LINE-TR
Line Regulation
Transient Line regulation
V
VDDIN
from 2.7V to 3.6V; I
Load
MAX
V
VDDIN
from 2.7V to 3.6V; tr = tf = 5µs; I
Load
Max
10
50
30
150
mV
V
LOAD
V
LOAD-TR
Load Regulation
Transient Load Regulation
V
VDDIN
≥
1.8V;
I
Load
= 10% to 90% MAX
V
VDDIN
≥
1.8V;
I
Load
= 10% to 90% MAX
tr = tf = 5 µs
20
50
40
150
mV
I
Q
Quiescent Current
Normal Mode;
@ I
Load
= 0 mA
@ I
Load
= 80 mA
Standby Mode;
5
500
1
µA
CD
IN
Input Decoupling Capacitor Cf. External Capacitor Requirements
(1)
4.7 µF
CD
OUT
Output Decoupling
Capacitor
Cf. External Capacitor Requirements
(2)
ESR
1.85
0.1
2.2 5.9
10
µF
Ohm
T
ON
Turn on Time CD
OUT
= 2.2µF, V
VDDOUT
reaches 1.2V (+/- 3%) 300 µs
T
OFF
Turn off Time CD
OUT
= 2.2µF 40 ms