ADP3408(Rev0) Ver la hoja de datos (PDF) - Analog Devices
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ADP3408 Datasheet PDF : 16 Pages
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ADP3408
ABSOLUTE MAXIMUM RATINGS*
Voltage on any pin with respect to
any GND Pin . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +10 V Pin
Voltage on any pin may not exceed VBAT, with the following 1
exceptions: CHRIN, GATEDR, ISENSE
Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C 2
Operating Ambient Temperature Range . . . . . –20°C to +85°C 3
Maximum Junction Temperature . . . . . . . . . . . . . . . . . 125°C 4
θJA, Thermal Impedance (TSSOP-28)
5
4-Layer PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68°C/W 6
1-Layer PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98°C/W
Lead Temperature Range (Soldering, 60 sec.) . . . . . . . . 300°C 7
*This is a stress rating only; operation beyond these limits can cause the device 8
to be permanently damaged.
9
ORDERING GUIDE
10
11
Core LDO
Output Temperature Package 12
Model
Voltage Range
Option*
13
14
ADP3408ARU-2.5 2.5 V
–20°C to +85°C RU-28
15
ADP3408ARU-1.8 1.8 V
–20°C to +85°C RU-28
16
*RU = Thin Shrink Small Outline
17
PIN CONFIGURATION
18
19
20
PWRONIN 1
28 TCXOEN
21
PWRONKEY 2
27 AGND
22
ROWX 3
26 REFOUT
23
SIMEN 4
25 VTCXO
24
VRTCIN 5
24 VAN
25
VRTC 6 ADP3408 23 VBAT
26
BATSNS 7 TOP VIEW 22 VCORE
27
MVBAT 8 (Not to Scale) 21 VMEM
28
CHRDET 9
20 VBAT2
CHRIN 10
19 VSIM
GATEIN 11
18 RESET
GATEDR 12
17 RESCAP
DGND 13
16 CHGEN
ISENSE 14
15 EOC
PIN FUNCTION DESCRIPTIONS
Mnemonic
PWRONIN
PWRONKEY
ROWX
SIMEN
VRTCIN
VRTC
BATSNS
MVBAT
CHRDET
CHRIN
GATEIN
GATEDR
DGND
ISENSE
EOC
CHGEN
RESCAP
RESET
VSIM
VBAT2
VMEM
VCORE
VBAT
VAN
VTCXO
REFOUT
AGND
TCXOEN
Function
Power On/Off Signal from
Microprocessor
Power-On/-Off Key
Power Key Interface Output
SIM LDO Enable
RTC LDO Input Voltage
Real-Time Clock Supply/
Coin Cell Battery Charger
Battery Voltage Sense Input
Divided Battery Voltage Output
Charge Detect Output
Charger Input Voltage
Microprocessor Gate Input
Signal
Gate Drive Output
Digital Ground
Charge Current Sense Input
End of Charge Signal
Charger Enable for GATEIN,
NiMH Pulse Charging
Reset Delay Time
Main Reset
SIM LDO Output
Battery Input Voltage 2
Memory LDO Output
Digital Core LDO Output
Battery Input Voltage
Analog LDO Output
TCXO LDO Output
Output Reference
Analog Ground
TCXO LDO Enable and
MVBAT Enable
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADP3408 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. 0
–5–
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