ATA5423 ATMEL Corporation, ATA5423 Datasheet - Page 30

• Manufacturer Part Number: ATA5423
• Manufacturer: ATMEL Corporation

5. Power Supply
Figure 5-1.
30
ATA5423/25/28/29 [Preliminary]
PWR_ON
VSINT
VAUX
(Control Register 3)
(Control Register 1)
Power Supply
(Command via SPI)
VSOUT_EN
VS1
VS2
AVCC_EN
DVCC_OK
T1
T5
OFFCMD
0.55 V
VS1 +
typ.
IN
The supply voltage range of the ATA5423/ATA5425/ATA5428/ATA5429 is 2.4 V to 3.6 V or
4.4 V to 6.6 V.
Pin VS1 is the supply voltage input for the range 2.4 V to 3.6 V and is used in battery applica-
tions using a single lithium 3 V cell. Pin VS2 is the voltage input for the range 4.4 V to 6.6 V
(2-Battery Application and Base–station Application); in this case, the voltage regulator V_REG1
regulates VS1 to typically 3.25 V. If the voltage regulator is active, a blocking capacitor of 2.2 µF
has to be connected to VS1.
Pin VAUX is an input for an additional auxiliary voltage supply and can be connected, for exam-
ple, to an inductive supply (see
with a rectifier or as in the application shown in
open.
Pin VSINT is the voltage input for the Microcontoller_Interface and must be connected to the
power supply of the microcontroller. The voltage range of V
5 on page 35
3.25 V typ.
V_REG2
1
1
(Status Register)
P_On_Aux
EN
S R Q
0 0 no change
0 1 0
1 0 1
1 1 1
IN
R
S
FF1
OUT
and
3.25 V typ.
Q
V_REG1
Figure 5-6 on page
EN
and
OUT
SW_VSOUT
Figure 5-6 on page
36).
SW_AVCC
SW_DVCC
Figure 2.2 on page 8
36). This input can only be used together
2.38 V typ.)
V_Monitor
(2.3 V/
(1.5 V typ.)
VSINT
V_Monitor
is 2.4 V to 5.25 V (see
and must otherwise be left
VSOUT_OK
(to XTO and
Reset Logic)
Low_Batt
(Status Register
and Reset Logic)
DVCC_OK
(to XTO and
Reset Logic)
AVCC
DVCC
VSOUT
4841A–RKE–02/05
Figure 5-