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ADP3404ARU
GSM Power Management System
REV.0
FEATURES
Handles all GSM Baseband Power Management
Functions
Four LDOs Optimized for Specific GSM Subsystems
Charges Back-Up Capacitor for Real-Time Clock
Charge Pump and Logic Level Translators for 3 V and 5 V
GSM SIM Modules
Narrow Body 4.4 mm 28-Lead TSSOP Package
APPLICATIONS
GSM/DCS/PCS Handsets
TeleMatic Systems
ICO/Iridium Terminals
GSM Power Management System
FUNCTIONAL BLOCK DIAGRAMVCC
VRTC
VTCXO
PWRONKEY
ROWX
PWRONIN
RESET
ANALOGON
VBAT
REFOUT
AGND
VCCA
RESCAP
CHRON
SIMBAT
CAP+
CAP�
SIMPROG
SIMON
SIMGND
RESETIN
CLKIN
DATAIO
I/ORSTCLK
VSIM
DGND
GENERAL DESCRIPTIONThe ADP3404 is a multifunction power management system IC
optimized for GSM cell phones. The wide input voltage range of
3.0 V to 7.0 V makes the ADP3404 ideal for both single cell
Li-Ion and three cell NiMH designs. The current consumption
of the ADP3404 has been optimized for maximum battery life,
featuring a ground current of only 230 µA when the phone is in
standby (digital LDO, analog LDO, and SIM card supply active).
An undervoltage lockout (UVLO) prevents the startup when
there is not enough energy in the battery. All four integrated
LDOs are optimized to power one of the critical sub-blocks of the
phone. Their novel anyCAP® architecture requires only very
small output capacitors for stability, and the LDOs are insensitive
to the capacitors’ equivalent series resistance (ESR). This makes
them stable with any capacitor, including ceramic (MLCC) types
for space-restricted applications.
A step-up converter is implemented to supply both the SIM
module and the level translation circuitry to adapt logic signals
for 3 V and 5 V SIM modules. Sophisticated controls are avail-
able for power-up during battery charging, keypad interface and
charging of an auxiliary back-up capacitor for the real-time clock.
These allow an easy interface between ADP3404, GSM proces-
sor, charger, and keypad. Furthermore, a reset circuit and a
thermal shutdown function have been implemented to support
reliable system design.
anyCAP is a registered trademark of Analog Devices, Inc.
ADP3404–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS1INPUT CHARACTERISTICS
PWRONKEY INPUT PULLUP
CHRON CHARACTERISTICS
SHUTDOWN
DIGITAL LDO (VCC)
(–20�C ≤ TA ≤ +85�C, VBAT = 3 V to 7 V, CVBAT = CSIMBAT = CVSIM = 10 �F, CVCC = CVCCA = 2.2 �F,
CVRTC = 0.1 �F, CVTCXO = 0.22 �F, CVCAP = 0.1 �F, minimum loads applied on all outputs,
unless otherwise noted.)
ADP3404
ADP3404–SPECIFICATIONSRESET GENERATOR (RESET)
NOTESAll limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
2This feature is intended to protect against catastrophic failure of the device. Maximum allowed operating junction temperature is 125°C. Operation beyond 125°C
could cause permanent damage to the device.
3Required for stability.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin with Respect to Any
GND Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V, +10 V
Voltage on Any Pin May Not Exceed VBAT, with the
Following Exceptions: VRTC,
VSIM, CAP+, PWRONIN, I/O, CLK, RST
Storage Temperature Range . . . . . . . . . . . .–65°C to +150°C
Operating Temperature Range . . . . . . . . . . .–20°C to +85°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . .125°C
θJA, Thermal Impedance (TSSOP-28) . .4-Layer Board 68°C/W
θJA, Thermal Impedance (TSSOP-28) . .6-Layer Board 62°C/W
Lead Temperature Range (Soldering, 60 sec) . . . . . . . .300°C
*This is a stress rating only, operation beyond these limits can cause the device to
be permanently damaged.
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP3404 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.
PIN CONFIGURATION
PIN FUNCTION DESCRIPTIONS
ORDERING GUIDE
ADP3404
Table I.LDO Control LogicX = Don’t care
Bold denotes the active control signal.
Table II.VSIM Control LogicX = Don’t care
