Analog Devices ADP3405 Datasheet

a

GSM Power Management System

ADP3405

FEATURES
Handles all GSM Baseband Power Management

Functions
Four LDOs Optimized for Specific GSM Subsystems
Charges Li-Mn Coin Cell 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

GENERAL DESCRIPTION

The ADP3405 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 ADP3405 ideal for both single cell Li-Ion
and three cell NiMH designs. The current consumption of the
ADP3405 has been optimized for maximum battery life, featuring
a ground current of only 150 µA when the phone is in standby
(digital 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 avail­able for power-up during battery charging, keypad interface, and
charging of an auxiliary backup battery for the real-time clock.
These allow an easy interface between ADP3405, GSM proces­sor, charger, and keypad. Furthermore, a reset circuit and a
thermal shutdown function have been implemented to support
reliable system design.

PWRONKEY

ROWX

PWRONIN

ANALOGON

RESCAP

CHRON

SIMBAT

CAP+

CAPⴚ

SIMPROG

SIMON

SIMGND

RESETIN

CLKIN

DATAIO

FUNCTIONAL BLOCK DIAGRAM

VBAT

ADP3405

DIGITAL

LDO

RTC LDO

POWER-UP

SEQUENCING

AND

PROTECTION

LOGIC

CHARGE

PUMP

LOGIC LEVEL

TRANSLATION

I/O

REF

RSTCLK

+

XTAL OSC

LDO

ANALOG

LDO

BUFFER

VCC

RESET

VRTC

VTCXO

VCCA

VSIM

REFOUT

DGND

AGND

anyCAP is a registered trademark of Analog Devices, Inc.

REV. 0

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site:www.analog.com
Fax: [phone] © Analog Devices, Inc., 2001

ADP3405–SPECIFICATIONS

(–20ⴗC ≤ TA ≤ +85ⴗC, VBAT = 3 V to 7 V, C
C

VRTC

= 0.1 ␮F, C

= 0.22 ␮F, C

VTCXO

= C

= C

VBAT

SIMBAT

= 0.1 ␮F, min. loads applied on all outputs, unless

VCAP

= 10 ␮F, C

VSIM

VCC

= C

VCCA

= 2.2 ␮F,

otherwise noted.)

ELECTRICAL CHARACTERISTICS

1

Parameter Symbol Conditions Min Typ Max Unit

SHUTDOWN SUPPLY CURRENT I

BAT

VBAT = Low (UVLO Low) VBAT = 2.7 V 3 20 µA
VBAT = High (UVLO High) VBAT = 3.6 V, VRTC On 12 30 µA

OPERATING GROUND CURRENT I

GND

VCC and VRTC On Minimum Loads, VBAT = 3.6 V 100 140 µA
VCC, VRTC and VSIM On Minimum Loads, VBAT
All LDOs and VSIM On Minimum Loads, VBAT

= 3.6 V 150 240 µA
= 3.6 V 260 400 µA

All LDOs and VSIM On Maximum Loads, VBAT = 3.6 V 15 mA

UVLO CHARACTERISTICS

UVLO On Threshold VBAT

UVLO

3.2 3.3 V

UVLO Hysteresis 200 mV

INPUT CHARACTERISTICS

Input High Voltage V

IH

PWRONIN and ANALOGON 2 V
PWRONKEY 0.7  VBAT V
Input Low Voltage V

IL

PWRONIN and ANALOGON 0.4 V
PWRONKEY 0.3  VBAT V

PWRONKEY INPUT PULL-UP

RESISTANCE TO VBAT 15 20 25 kΩ

CHRON CHARACTERISTICS

CHRON Threshold V
CHRON Hysteresis Resistance R
CHRON Input Bias Current I

T

IN

B

2.38 < CHRON < V
CHRON > V

T

T

2.38 2.48 2.58 V
108 125 138 kΩ

0.5 µA

ROWX CHARACTERISTICS

ROWX Output Low Voltage V

ROWX Output High Leakage I

OL

IH

PWRONKEY = Low 0.4 V
I

= 200 µA

OL

PWRONKEY = High 1 µA

Current V(ROWX) = 5 V

SHUTDOWN

Thermal Shutdown Threshold

2

Junction Temperature 160 ºC

Thermal Shutdown Hysteresis Junction Temperature 35 ºC

DIGITAL LDO (VCC)

Output Voltage VCC Line, Load, Temp 2.710 2.765 2.820 V
Line Regulation DVCC 3 V < VBAT < 7 V, Min Load 2 mV
Load Regulation DVCC 50 µA < I

Output Capacitor

3

Dropout Voltage V

C

O

DO

VBAT = 3.6 V

VO = V
I

= 100 mA

LOAD

< 100 mA, 15 mV

LOAD

2.2 µF

– 100 mV 215 mV

INITIAL

ANALOG LDO (VCCA)

Output Voltage VCCA Line, Load, Temp 2.710 2.765 2.820 V
Line Regulation DVCCA 3 V < VBAT < 7 V, Min Load 2 mV
Load Regulation DVCCA 200 µA < I

Output Capacitor

3

Dropout Voltage V

C

O

DO

VBAT = 3.6 V

VO = V

INITIAL

= 130 mA

I

LOAD

< 130 mA, 15 mV

LOAD

2.2 µF

– 100 mV 215 mV

Ripple Rejection DVBAT/ f = 217 Hz (t = 4.6 ms) 65 70 dB

DVCCA VBAT = 3.6 V

Output Noise Voltage V

NOISE

f = 10 Hz to 100 kHz 75 µV rms
I

= 130 mA, VBAT = 3.6 V

LOAD

–2–

REV. 0

ADP3405

Parameter Symbol Conditions Min Typ Max Unit

CRYSTAL OSCILLATOR LDO (VTCXO)

Output Voltage VTCXO Line, Load, Temp 2.710 2.765 2.820 V
Line Regulation ∆VTCXO 3 V < VBAT < 7 V, Min Load 2 mV
Load Regulation ∆VTCXO 100 µA < I

Output Capacitor

3

Dropout Voltage V

C

O

DO

VBAT = 3.6 V

VO = V

INITIAL

I

= 5 mA

LOAD

Ripple Rejection ∆VBAT/ f = 217 Hz (t = 4.6 ms), 65 72 dB

∆VTCXO VBAT = 3.6 V

Output Noise Voltage V

NOISE

f = 10 Hz to 100 kHz 80 µV rms
I

= 5 mA, VBAT = 3.6 V

LOAD

VOLTAGE REFERENCE (REFOUT)

Output Voltage V
Line Regulation ∆V

REFOUT

REFOUT

Line, Load, Temp 1.192 1.210 1.228 V
3 V < VBAT < 7 V, Min Load 2 mV

< 5 mA, 1 mV

LOAD

0.22 µF

– 100 mV 150 mV

Load Regulation ∆V

REFOUT

0 µA < I

< 50 µA, 0.5 mV

LOAD

VBAT = 3.6 V

Ripple Rejection ∆VBAT/ f = 217 Hz (t = 4.6 ms), 65 75 dB

VBAT = 3.6 V

100 pF

f = 10 Hz to 100 kHz 40 µV rms

Maximum Capacitive Load C
Output Noise Voltage V

∆V

O

NOISE

REFOUT

VBAT = 3.6 V

REAL-TIME CLOCK LDO/
BATTERY CHARGER (VRTC)

Maximum Output Voltage VRTC I
Current Limit I
Off Reverse Leakage

Current

Dropout Voltage V

MAX

I

L

DO

≤ 10 µA 2.810 2.850 2.890 V

LOAD

3.050 V < VBAT < 7 V 175 µA

2.0 V < VBAT < UVLO 1 µA
VO = V
I

LOAD

= 10 µA

– 10 mV 170 mV

INITIAL

SIM CHARGE PUMP (VSIM)

Output Voltage for 5 V SIM Modules VSIM 0 mA ≤ I

≤ 10 mA 4.70 5.00 5.30 V

LOAD

SIMPROG = High

Output Voltage for 3 V SIM Modules VSIM 0 mA ≤ I

≤ 6 mA 2.82 3.00 3.18 V

LOAD

SIMPROG = Low

GSM/SIM LOGIC TRANSLATION
(GSM INTERFACE)

Input High Voltage (SIMPROG, SIMON, V

IH

VCC – 0.6 V
RESETIN, CLKIN)
Input Low Voltage (SIMPROG, SIMON, V

IL

0.6 V
RESETIN, CLKIN)
DATAIO V

DATAIO Pull-Up Resistance to VCC R

IL

V

, V

IH

OH

I

IL

V

OL

IN

VOL(I/O) = 0.4 V, 0.230 V
I

(I/O) = 1 mA

OL

V

(I/O) = 0.4 V, 0.335 V

OL

(I/O ) = 0 mA

I

OL

IIH, IOH = ±10 µA VCC – 0.4 V
VIL = 0 V –0.9 mA
VIL (I/O) = 0.4 V 0.420 V

16 20 24 kΩ

–3–REV. 0

ADP3405

Parameter Symbol Conditions Min Typ Max Unit

SIM INTERFACE

VSIM = 5 V
RST V
RST V
CLK V
CLK V
I/O V
I/O V
I/O I
I/O V

OL

OH

OL

OH

IL

, V

IH

OH

IL

OL

VSIM = 3 V
RST V
RST V
CLK V
CLK V
I/O V
I/O V
I/O I
I/O V

I/O Pull-Up Resistance to VSIM R
Max Frequency (CLK) f
Prop Delay (CLK) t
Output Rise/Fall Times (CLK) t
Output Rise/Fall Times (I/O, RST) t

OL

OH

OL

OH

IL

IH

IL

OL

IN

MAX

D

, t

R

, t

R

, V

F

F

OH

Duty Cycle (CLK) D D CLKIN = 50% 47 53 %

RESET GENERATOR (RESET)

Output High Voltage V
Output Low Voltage V
Delay Time Per Unit Capacitance t

OH

OL

D

Applied to RESCAP Pin

NOTES

1

All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods .

2

This 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.

3

Required for stability.

Specifications subject to change without notice.

I = +200 µA 0.6 V
I = –20 µA VSIM – 0.7 V
I = +200 µA 0.5 V
I = –20 µA 0.7  VSIM V

0.4 V
IIH, IOH = ±20 µA VSIM – 0.4 V
VIL = 0 V –0.9 mA
IOL = +1 mA 0.4 V
DATAIO ≤ 0.23 V

I = +200 µA 0.2  VSIM V
I = –20 µA 0.8  VSIM V
I = +20 µA 0.2  VSIM V
I = –20 µA 0.7  VSIM V

0.4 V
IIH, IOH = ±20 µA VSIM – 0.4 V
VIL= 0 V –0.9 mA
IOL = 1 mA 0.4 V
DATAIO ≤ 0.23 V

81012kΩ

CL = 30 pF 5 MHz

30 50 ns
CL = 30 pF 9 18 ns
CL = 30 pF 1 µs

f = 5 MHz

IOH = –15 µA VCC – 0.3 V
IOL = –15 µA 0.3 V

1.0 ms/nF

–4–

REV. 0