Datasheet

DRAFT
1381
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
Notes: 1. A 10 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 4.7 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 0.5–10 Ω.
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 decreases output noise and improves
the load transient response.
3. Defined as the current needed to charge external bypass/decoupling capacitor network.
Table 45-3. 1.8V Voltage Regulator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
DDIN
DC Input Voltage Range 1.8 3.3 3.6 V
V
DDOUT
DC Output Voltage
Normal Mode 1.8
V
Standby Mode 0
V
O(accuracy)
Output Voltage Accuracy I
LOAD
= 0.5–150 mA -3 3 %
I
LOAD
Maximum DC Output Current
V
DDIN
> 2.2V 150
mA
V
DDIN
≤ 2.2V 60
I
LOAD-START
Maximum Peak Current
during startup
(3)
300 mA
V
DROPOUT
Dropout Voltage
V
DDIN
= 1.8V
I
LOAD
= 60 mA
120 240 mV
V
LINE
Line Regulation
V
DDIN
from 2.7V to 3.6V
I
LOAD
MAX
20 50 mV
V
LINE-TR
Transient Line regulation
V
DDIN
from 2.7V to 3.6V
t
r
= t
f
= 5 µs
I
LOAD
Max
CD
OUT
= 4.7 µF
50 100 mV
V
LOAD
Load Regulation
V
DDIN
≥ 2.2V
I
LOAD
= 10% to 90% MAX
20 50
mV
V
LOAD-TR
Transient Load Regulation
V
DDIN
≥ 2.2V
I
LOAD
= 10% to 90% MAX
t
r
= t
f
= 5 µs
CD
OUT
= 4.7 µF
50 100
I
Q
Quiescent Current
Normal Mode @ I
LOAD
= 0 mA 7 10
µANormal Mode @ I
LOAD
= 150 mA 700 1200
Standby Mode 1
CD
IN
Input Decoupling Capacitor
(1)
10 µF
CD
OUT
Output Decoupling Capacitor
(2)
4.7 µF
ESR 0.5 10 Ω
t
on
Turn on Time
CD
OUT
= 4.7 µF
V
DDOUT
reaches V
T+
(core power brownout detector
supply rising threshold)
120 250
µs
CD
OUT
= 4.7 µF
V
DDOUT
reaches 1.8V (± 3%)
200 400