19-5843; Rev 0; 5/11
TION KIT
EVALUA BLE
AVAILA
System Power Management
for Mobile Handset
Two 25mA Individually Programmable Current
Regulators
I
2
C Programmable Output Current (50µA to
25.25mA) with 128-Step Pseudo Log Dimming
Individually Programmable Ramp (Up/Down)
Timers
Low Dropout (150mV max)
Linear One-Cell Li+ Battery Charger
No External MOSFET, Reverse Blocking Diode,
or Current-Sense Resistor
Programmable Fast-Charge Current (1.5A
RMS
max)
Programmable Top-Off Current Threshold
Proprietary Die Temperature Regulation Control
4.1V to 10V Input Voltage Range with Input
Overvoltage Protection Up to 28V
Low-Dropout Voltage (300mV at 500mA)
Input Power-Source Detection Output
Input Overvoltage Protected 4.75V Output
(SAFE_OUT) from IN
Charge Current Monitor Output
Indicator LED
Hardware Input Enable
5s Watchdog Feature During Charge
Four Low-Noise LDOs
1x 400mA, 2 x 200mA and 1x 100mA Output
Current
High 65dB (typ) PSRR
Low Noise (45µV
RMS
typ)
1.7V to 3.2V Programmable Output Voltage
Low Quiescent Current (25µA typ)
400mA LDO with Hardware Enable Input
Vibrator Driver
Guaranteed 200mA Output Current
Programmable Output Voltage 1.3V to V
INVIB
Repetition Frequency 23.8kHz
PWM Speed Control in 70 steps
Active Stop Brake
Control Interface for 61XX Baseband
MAX8939 Control Through I
2
C
RESET_IN
Reset Input
Charger Detect PWR_ON_CMP Output
IRQ
Interrupt Output
2.7V to 5.5V Supply Voltage Range
Thermal Shutdown
General Description
The MAX8939 power management IC contains the nec-
essary supplies and features for supporting cell phone
designs based on the Intel Mobile Communications (IMC)
61XX 3G platform. Designed to power all peripheral com-
ponents in the platform, the MAX8939 also provides the
necessary signals to control the 61XX baseband processor.
The integrated lithium-ion (Li+) charger is protected up
to 28V input and features a protected output voltage
for supply of a USB transceiver. Proprietary thermal-
regulation circuitry limits the die temperature during
fast-charging or when the IC is exposed to high ambient
temperatures, allowing maximum charging current with-
out damaging the IC. A dedicated current regulator is
included for driving a charge indicator LED.
Four programmable low-noise, low-dropout linear regula-
tors (LDOs) provide the supply for noise sensitive periph-
erals. A high power vibrator driver is I
2
C programmable
in 70 PWM levels and 4 output voltages. The MAX8939
also offers two step-up converters; one high power, low
voltage (5V) to supply an external audio amplifier or
camera flash, and a high voltage (28V) supply for the
display and keyboard backlight. Two integrated 25mA
current regulators provide independent ramp-up and
ramp-down control, programmable through I
2
C.
The MAX8939 is a highly integrated IC that requires very few
external components and is available in a compact 2.5mm
x 3.0mm, 0.65mm max height wafer level package (WLP).
MAX8939
S
S
S
Applications
Companion Chip for Cell Phones/Smartphones
Features
S
Step-Up Converter
700mA Guaranteed Output Current
I
2
C Programmable Output 3.5V to 5.0V in 16 Steps
Over 90% Efficiency
On-Chip FET and Synchronous Rectifier
Fixed 2MHz PWM Switching
Small 2.2µH to 10µH Inductor
S
WLED Boost Converter
28V Max Step-Up Output Voltage
60mA Output Current
Integrated nMOS Power Switch
Over 90% Efficiency
Fixed 2MHz Switching
Small 4.7µH to 10µH Inductor
S
S
S
Ordering Information
PART
MAX8939EWV+T
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
30 WLP
(0.5mm pitch)
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit appears at end of data sheet.
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
System Power Management
for Mobile Handset
MAX8939
ABSOLUTE MAXIMUM RATINGS
BATT, OUT1, SAFE_OUT, and INVIB to AGND ....-0.3V to +6.0V
CHG_IN, OUT2, LED1, and LED2 to AGND .........-0.3V to +30V
LED3 and CHG_MON to AGND.... -0.3V to (V
SAFE_OUT
+ 0.3V)
COMP2,
IRQ, RESET_IN,
COMP1, SCL, SDA,
CHG,
PWR_ON_CMP, REF, LDO1, LDO2, LDO3, LDO4,
and LDO1_EN to AGND .................... -0.3V to (V
BATT
+ 0.3V)
OUTVIB to AGND .................................. -0.3V to (V
INVIB
+ 0.3V)
PGND1 and PGND2 to AGND .............................-0.3V to +0.3V
LX1, LX2 Current (Note 1) ............................................. 1.7A
RMS
Continuous Power Dissipation (T
A
= +70NC)
WLP (derate 24.4mW/NC above +70NC)..........................1.9W
Junction to Ambient Thermal Resistance (B
JA
)
(Note 2)........................................................................41NC/W
Operating Temperature ...................................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Soldering Temperature (reflow) ......................................+260NC
Note 1:
LX1 has internal clamp diodes to PGND1 and OUT1. LX2 has internal clamp diodes to PGND2 and OUT2. Applications
that forward bias these diodes should take care not to exceed the IC package power dissipation limit.
Note 2:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-lay-
er board. For detailed information on package thermal considerations, refer to
http://www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
BATT
= 3.7V, V
CHG_IN
= 5.0V, circuit of Figure 1, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.)
PARAMETER
BATT
BATT Operating Voltage
BATT Shutdown Supply Current
BATT Standby Supply Current
BATT Biasing Supply Current
Undervoltage Lockout (UVLO)
Threshold
Undervoltage Lockout Hysteresis
THERMAL SHUTDOWN
Threshold
Hysteresis
REFERENCE
Reference Output Voltage
Reference Supply Rejection
LOGIC AND CONTROL INPUTS
Input Low Level
Input High Level
Logic-Input Current
SDA, SCL, LDO1_EN,
CHG,
and
RESET_IN
SDA, SCL, LDO1_EN,
CHG,
and
RESET_IN
T
A
= +25NC
SDA, SCL, LDO1_EN,
CHG,
and
RESET_IN,
0 < V
IN
< 5.5V T
A
= +85NC
1.40
-1
0.1
+1
0.4
V
V
FA
1.200
0.2
V
mV
+160
20
NC
NC
All outputs off, I
2
C disabled,
V
SCL
= V
SDA
= V
RESET_IN
= 0V
All outputs off, V
SCL
= V
SDA
=
V
RESET_IN
= 1.8V, I
2
C ready
T
A
= +25NC
T
A
= +85NC
T
A
= +25NC
T
A
= +85NC
2.9
0.4
0.4
5
5
60
2.6
2.75
100
2.9
10
5.5
1
V
FA
FA
FA
V
mV
CONDITIONS
MIN
TYP
MAX
UNITS
I
2
C ready, one or more outputs on
BATT rising
2
______________________________________________________________________________________
System Power Management
for Mobile Handset
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 3.7V, V
CHG_IN
= 5.0V, circuit of Figure 1, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.)
PARAMETER
LOGIC AND CONTROL OUTPUTS
IRQ
(Open-Drain Output)
Output Low Voltage
PWR_ON_CMP (Open-Drain
Output) Output Low Voltage
SDA Output Low Level
Clock Frequency
Bus-Free Time Between START and
t
BUF
STOP
Hold Time Repeated START
Condition
SCL Low Period
SCL High Period
Setup Time Repeated START
Condition
SDA Hold Time
SDA Setup time
Maximum Pulse Width of Spikes
that Must Be Suppressed by the
Input Filter of Both DATA and CLK
Signals
Setup Time for STOP Condition
CHG_IN
Input Operating Range
V
CHG_IN
- V
BATT
, rising
CHG_IN Trip Point
Input Undervoltage Threshold (UV)
Input Overvoltage Threshold (OVP)
Input Supply Current
Shutdown Input Current
CHG_IN to BATT Dropout
On-Resistance
SAFE_OUT
I
SAFE_OUT
= 15mA, V
CHG_IN
= 5V,
T
A
= 0NC to +85NC
I
SAFE_OUT
= 15mA, V
CHG_IN
= 10V,
T
A
= 0NC to +85NC
100
4.75
4.90
5.00
V
5.2
mA
V
CHG_IN
- V
BATT
, falling
V
CHG_IN
- V
BATT
, hysteresis
V
CHG_IN
rising, 500mV hysteresis (typ)
V
CHG_IN
rising, 200mV hysteresis (typ)
I
BATT
= 0mA
Charger disabled
V
CHG_IN
= 3.7V, V
BATT
= 3.6V
0.4
3.9
10.2
4.1
200
300
100
200
4.0
10.6
750
4.1
11
1500
500
0.8
V
V
FA
FA
I
10
400
mV
V
t
SU_STO
0.6
t
HD_STA
t
LOW
t
HIGH
t
SU_STA
t
HD_DAT
t
SU_DAT
1.3
0.6
1.3
0.6
0.6
0
100
50
I
IRQ
= 2mA
I
PWR_ON_CMP
= 2mA
I
SDA
= 6mA
0.4
0.4
0.4
400
V
V
V
kHz
Fs
Fs
Fs
Fs
Fs
Fs
ns
ns
CONDITIONS
MIN
TYP
MAX
UNITS
MAX8939
I
2
C SERIAL INTERFACE (V
SCL
= V
SDA
= 3V) (Figure 15)
Fs
SAFE_OUT Regulated Output
SAFE_OUT Current Limit
_______________________________________________________________________________________
3
System Power Management
for Mobile Handset
MAX8939
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 3.7V, V
CHG_IN
= 5.0V, circuit of Figure 1, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.)
PARAMETER
CHG_MON
I/V Conversion Factor
I/V Accuracy
Output Voltage
Charge Monitoring Range
Output Impedance
INDICATOR LED
LED3 Current Sink
BATT
BATT Regulation Voltage
I
BATT
= 90mA,
V
BATT
programmed to 4.2V
T
A
= +25NC
T
A
= -40NC to +85NC
4.179
4.158
4.2
4.2
-200
-300
-400
Disable
80
240
400
560
630
700
940
1050
90
270
450
630
765
850
1020
1275
90
2.5
2.55
2.5
0
10
20
-20
From entering fast-charge to V
BATT
< 4.2V, default value
60
30
30
60
120
Disable
2.5
5
10
+20
100
300
500
700
900
1000
1200
1500
100
2.6
mA
V
ms
mA
4.221
4.242
V
V
CHG_IN
= 5V, T
A
= 0NC to +85NC
1.5
3
5
mA
Monitoring voltage to charge current - fast-charge
current = 450mA (Note 3)
Overall range
450mA charge current - fast-charge current = 450mA
(Note 3)
0
10
20
-10
1200
1.2
40
2.666
+10
mV/mA
%
mV
V
kI
CONDITIONS
MIN
TYP
MAX
UNITS
Programmable Restart Fast-Charge
From BATT regulation voltage, default = disable
Threshold
CHG_CONTROL_A.FAST_CHARGE = 000b
001b
010b
CHG_IN Fast-Charge Current
(Note 4)
V
BATT
= 3.5V
011b
100b
101b
110b
111b
CHG_IN Precharge Current
BATT Prequalification Threshold
Voltage
Soft-Start Time
TOP-OFF
Top-Off Threshold
(% of Fast-Charge Current)
TIMER
Timer Accuracy
Fast-Charge Time Limit
Precharge Timer
Top-Off Timer
Watchdog Timer
I
BATT
falling, default value = 0%
V
BATT
= 2V
V
BATT
rising hysteresis 140mV (typ)
Ramp time to fast-charge current
mV
%
%
min
min
min
s
4
______________________________________________________________________________________
System Power Management
for Mobile Handset
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 3.7V, V
CHG_IN
= 5.0V, circuit of Figure 1, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.)
PARAMETER
THERMAL LOOP
Thermal Limit Temperature
Junction temperature when the charge current is
reduced, T
J
rising, default value
2.9
2MHz switching, V
OUT
= 5V, no load
500mA load, default value, T
A
= +85NC
V
BATT
R
3.2V, V
OUT1
= 5.0V
V
BATT
= 2.9V to 4.2V
0 to 500mA load
LX1 to PGND1, I
LX1
= 200mA
LX1 to OUT1, I
LX1
= -200mA
V
LX1
= 5.5V
T
A
= +25NC
T
A
= +85NC
1.8
65
During shutdown or UVLO
1mA at V
BATT
= V
INVIB
= 5.5V, 150mA at V
BATT
=
V
INVIB
= 3.4V, default value
V
OUTVIB
= 0V
I
LOAD
= 135mA, T
A
= +25NC
3.4V
P
V
BATT
= V
INVIB
< 5.5V, I
LOAD
= 100mA
1mA < I
LOAD
< 200mA
f = 10Hz to 10kHz, I
LOAD
= 30mA
100Hz to 100kHz, I
LOAD
= 30mA
T
OFF
90% to 5%, C = 1FF
nFET on-resistance
nFET on duration
I
LOAD
= 1mA default 2.9V setting
V
LDO1
= 0V
I
LOAD
= 200mA
3.4V
P
V
BATT
P
5.5V, I
LOAD
= 100mA
2.813
400
600
200
2.4
400
4.8
550
2.0
0.1
0.5
0.1
0.15
0.1
1
2
75
8
220
2.2
0.2
0.3
5
11
5.0
700
5.2
+100
NC
CONDITIONS
MIN
TYP
MAX
UNITS
MAX8939
OUT1 STEP-UP DC-DC CONVERTER
Input Voltage (V
BATT
)
Input Supply Current
OUT1 Voltage Accuracy
Maximum Output Current
nFET Current Limit
Line Regulation
Load Regulation
LX1 nFET On-Resistance
LX1 pFET On-Resistance
LX1 Leakage
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
COMP Discharge Resistance
VIBRATOR
Programmable Output Voltage
OUTVIB
Output Current
Current Limit
Dropout Voltage
Line Regulation
Load Regulation
Power-Supply Rejection
DV
INVIB
/DV
OUTVIB
Output Noise
Discharge Time Constant
Active Stop
Active Brake on Shutdown
LDO1
Output Voltage Accuracy
Maximum Output Current
Current Limit
Dropout Voltage
Line Regulation
2.9
2.987
V
mA
mA
mV
mV
400
150
2.2
25
40
65
0.1
1
85
3
200
600
300
V
mA
mA
mV
mV
mV
dB
FV
RMS
ms
I
ms
5.5
V
mA
V
mA
A
%/V
%/A
I
I
FA
MHz
%
%
I
_______________________________________________________________________________________
5
意法半导体-低功耗射频
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
