Datasheet
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1418
Notes: 1. A 4.7 µF 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 2.2 µF 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 0.1Ω to 10Ω.
Solid tantalum and multilayer ceramic capacitors are all suitable as output capacitor.
A 100 nF 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 voltage +0.5V)
Table 47-3. 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
= 0.8 mA to 80 mA (after trimming) -4 4 %
I
LOAD
I
LOAD-START
Maximum DC Output
Current
Maximum Peak Current
during startup
V
VDDIN
> 1.8V
V
VDDIN
≤ 1.8V
—
—
—
—
120
70
mA
(3)
— — 400 mA
D
DROPOUT
Dropout Voltage V
VDDIN
= 1.6V, I
Load
= 70mA — 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; t
r
= t
f
= 5µs; I
Load
Max
CD
OUT
= 4.7µF
—
—
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
t
r
= t
f
= 5 µs
CD
OUT
= 4.7 µF
—
—
25
45
60
210
mV
I
Q
Quiescent Current
Normal Mode;
@ I
Load
= 0 mA
@ I
Load
= 120 mA
Standby Mode;
—
—
—
5.5
350
0.06
—
—
—
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
Ω
t
ON
Turn on Time
CD
OUT
= 2.2 µF, V
VDDOUT
reaches 1.2V
(+/- 3%)
—300—µs
t
OFF
Turn off Time CD
OUT
= 2.2 µF; V
VDDIN
≥ 1.8V — — 9.5 ms