ADP3401 Analog Devices, ADP3401 Datasheet - Page 6

• Manufacturer Part Number: ADP3401
• Description: GSM Power Management System
• Manufacturer: Analog Devices

ADP3401
INPUTS
UVLO
L
H
H
H
H
H
X = Don't care
Bold denotes the active control signal.
PWRONKEY
ANALOGON
PWRONIN
SIMPROG
RESETIN
CHRON
X
H
X
L
L
L
RESCAP
SIMGND
SIMBAT
DATAIO
CHRON
SIMON
ROWX
CLKIN
CAP
CAP+
ADP3401
THRESHOLD
CHARGER
PWRONKEY
X
X
L
H
H
H
3V/5V
EN
ON
CHARGE
PUMP
INPUTS
VCC
Off
On
On
On
On
X = Don't care
TRANSLATION
20k
EN
LOGIC
LEVEL
RESET
L
L
H
H
H
UVLO
PWRONIN
X
X
X
L
H
H
I/O
Figure 1. Functional Block Diagram
CLK
GENERATOR
RESET
Table II. VSIM Control Logic
Table I. LDO Control Logic
RST
UVLO
SIMON
X
X
L
H
H
VBAT
VSIM
OVER
TEMP
ADJ
ANALOGON
X
X
X
X
L
H
–6–
SIMPROG
X
X
X
L
H
OUTPUTS
VRTC
Off
On
On
On
On
On
+
OUTPUTS
VSIM
Off
Off
Off
3 V
5 V
VCC
Off
On
On
Off
On
On
1.210V
POWER GOOD
VBAT
VREF
EN
VBAT
VREF
EN
VBAT
VREF
EN
VBAT
EN
EN
REF
BUFFER
XTAL OSC LDO
ANALOG LDO
DIGITAL LDO
VCCA
Off
On
On
Off
Off
On
RTC LDO
GND
GND
GND
GND
OUT
OUT
OUT
OUT
PG
REFOUT
Off
On
On
Off
Off
On
VCC
2.765V
DGND
VRTC
2.85V
RESET
VTCXO
2.765V
VCCA
2.765V
REFOUT
AGND
VTCXO
Off
On
On
Off
Off
On
REV. 0