19-0732; Rev 2; 12/10
KIT
ATION
EVALU
BLE
AVAILA
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
General Description
Features
o
Two 95%-Efficient 1MHz Buck Regulators
Main Regulator: 0.98V to V
IN
at 1200mA
Core Regulator: 0.98V to V
IN
at 900mA
o
1MHz Boost WLED Driver
Drives Up to 7 White LEDs at 30mA (max)
PWM and Analog Dimming Control
o
Four Low-Dropout Linear Regulators
1.7V to 5.5V Input Range
15µA Quiescent Current
o
Single-Cell Li+ Charger
Adapter or USB Input
Thermal-Overload Protection
o
Smart Power Selector (SPS)
AC Adapter/USB or Battery Source
Charger-Current and System-Load Sharing
MAX8662/MAX8663
The MAX8662/MAX8663 power-management ICs
(PMICs) are efficient, compact devices suitable for
smart cellular phones, PDAs, Internet appliances, and
other portable devices. They integrate two synchronous
buck regulators, a boost regulator driving two to seven
white LEDs, four low-dropout linear regulators (LDOs),
and a linear charger for a single-cell Li-ion (Li+) battery.
Maxim’s Smart Power Selector™ (SPS) safely distrib-
utes power between an external power source (AC
adapter, auto adapter, or USB source), battery, and the
system load. When system load peaks exceed the
external source capability, the battery supplies supple-
mental current. When system load requirements are
small, residual power from the external power source
charges the battery. A thermal-limiting circuit limits bat-
tery-charge rate and external power-source current to
prevent overheating. The PMIC also allows the system
to operate with no battery or a discharged battery.
The MAX8662 is available in a 6mm x 6mm, 48-pin TQFN
package, while the MAX8663, without the LED driver, is
available in a 5mm x 5mm, 40-pin TQFN package.
Ordering Information
PART
MAX8662ETM+
MAX8663ETL+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
48 TQFN-EP*
6mm x 6mm x 0.8mm
40 TQFN-EP*
5mm x 5mm x 0.8mm
Applications
Smart Phones and PDAs
MP3 and Portable Media Players
Palmtop and Wireless Handhelds
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Pin Configurations
CC3
OVP
PG2
PG1
EN2
PV2
PV1
EN1
LX2
FB2
LX1
CS
Typical Operating Circuit
DC/USB
INPUT
PWR OK
DC
POK
CHG
CEN
EN1
EN2
EN3
(MAX8662 ONLY)
EN4
EN5
EN6
OUT4
EN7
OUT4–OUT7
VOLTAGE
SELECT
SL1
SL2
OUT5
OUT6
OUT7
500mA
150mA
300mA
150mA
CS
LX2
LX3
SYS
BAT
TO SYSTEM
POWER
Li+
BATTERY
OUT1
0.98V TO V
IN
/ 1.2A
OUT2
0.98V TO V
IN
/ 0.9A
TO SYS
OUT3
30mA
WLED
TOP VIEW
36 35 34 33 32 31 30 29 28 27 26 25
EN6
EN7
LX3
PG3
OUT6
IN67
OUT7
VL
SL1
SL2
PSET
POK
37
38
39
40
41
42
43
44
45
46
47
48
1
PEN1
2
PEN2
3
EN3
4
DC1
5
DC2
6
SYS1
7
SYS2
8
BAT1
9
BAT2
10 11 12
BRT
CHG
CEN
EP
24
23
22
21
20
19
FB1
PWM
EN5
EN4
OUT5
IN45
OUT4
GND
REF
CT
ISET
THM
CHARGE
STATUS
CHARGE
ENABLE
MAX8662
MAX8663
LX1
MAX8662
18
17
16
15
14
13
TQFN
(6mm x 6mm)
Pin Configurations continued at end of data sheet.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
1
________________________________________________________________
Maxim Integrated Products
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.
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
MAX8662/MAX8663
ABSOLUTE MAXIMUM RATINGS
LX3 to GND ............................................................-0.3V to +33V
DC_ to GND..............................................................-0.3V to +9V
BAT_,
CEN, CHG,
EN_, PEN_,
POK,
PV_, PWM,
SYS_, LX1, CS, LX2 to GND .................................-0.3V to +6V
VL to GND ................................................................-0.3V to +4V
BRT, CC3, FB_, IN45, IN67, OVP, REF,
SL_ to GND ...........................................-0.3V to (V
SYS
+ 0.3V)
CT, ISET, PSET, THM to GND .....................-0.3V to (V
VL
+ 0.3V)
OUT4, OUT5 to GND................................-0.3V to (V
IN45
+ 0.3V)
OUT6, OUT7 to GND................................-0.3V to (V
IN67
+ 0.3V)
PG_ to GND...........................................................-0.3V to +0.3V
BAT1 + BAT2 Continuous Current ...........................................3A
SYS1 + SYS2 Continuous Current (2 pins) ..............................3A
LX_ Continuous Current ........................................................1.5A
Continuous Power Dissipation (T
A
= +70°C)
40-Pin 5mm x 5mm TQFN
(derate 35.7mW/°C above +70°C)
(multilayer board) .......................................................2857mW
48-Pin 6mm x 6mm TQFN
(derate 37mW/°C above +70°C) (multilayer board)...2963mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature Range ............................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
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 (Input Limiter and Battery Charger)
(V
DC
= 5V, V
BAT
= 4V, V
CEN
= 0V, V
PEN_
= 5V, R
PSET
= 3kΩ, R
ISET
= 3.15kΩ, C
CT
= 0.068µF, T
A
= -40°C to +85°C, unless otherwise
noted.) (Note 1)
PARAMETER
INPUT LIMITER
DC Operating Range
DC Undervoltage Threshold
DC Overvoltage Threshold
DC Supply Current
DC Shutdown Current
DC-to-SYS Dropout
On-Resistance
DC-to-BAT Dropout
Threshold
VL Voltage
SYS Regulation Voltage
R
DC_SYS
V
DR_DC_BAT
V
VL
V
SYS_REG
V
DC
V
DC_L
V
DC_H
(Note 2)
V
DC
rising, 500mV hysteresis
V
DC
rising, 100mV hysteresis
I
SYS
= I
BAT
= 0mA, V
CEN
= 0V
I
SYS
= I
BAT
= 0mA, V
CEN
= 5V
V
DC
= 5V, V
CEN
= 5V, V
PEN1
= V
PEN2
= 0V (USB
suspend mode)
V
DC
= 5V, I
SYS
= 400mA, V
CEN
= 5V
When V
SYS
regulation and charging stops, V
DC
falling, 150mV hysteresis
I
VL
= 0 to 10mA
V
DC
= 5.8V, I
SYS
= 1mA, V
CEN
= 5V
V
PEN1
= 5V, V
PEN2
= 5V,
R
PSET =
1.5kΩ
V
PEN1
= 5V, V
PEN2
= 5V,
R
PSET
= 3kΩ
DC Input Current Limit
I
DC_LIM
V
DC
= 5V, V
SYS
= 4.0V
V
PEN1
= 5V, V
PEN2
= 5V,
R
PSET
= 6kΩ
V
PEN1
= 0V, V
PEN2
= 5V
(500mA USB mode)
V
PEN1
= V
PEN2
= 0V
(100mA USB mode)
PSET Resistance Range
Input Limiter Soft-Start Time
R
PSET
Guaranteed by SYS current limit
T
SS_DC_SYS
Current-limit ramp time
20
3.1
5.2
1800
900
450
450
80
1.5
1.5
4.1
3.9
6.6
4.0
6.9
1.5
0.9
110
0.1
50
3.3
5.3
2000
1000
500
475
90
180
0.2
85
3.5
5.4
2200
1100
550
500
100
6.0
kΩ
ms
mA
8.0
4.1
7.2
V
V
V
mA
µA
Ω
mV
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
ELECTRICAL CHARACTERISTICS (Input Limiter and Battery Charger) (continued)
(V
DC
= 5V, V
BAT
= 4V, V
CEN
= 0V, V
PEN_
= 5V, R
PSET
= 3kΩ, R
ISET
= 3.15kΩ, C
CT
= 0.068µF, T
A
= -40°C to +85°C, unless otherwise
noted.) (Note 1)
PARAMETER
BATTERY CHARGER
BAT-to-SYS On-Resistance
BAT-to-SYS Reverse
Regulation Voltage
BAT Regulation Voltage
BAT Recharge Threshold
BAT Fast-Charge Current
V
BAT_REG
R
BAT_REG
V
DC
= 0V, V
BAT
= 4.2V, I
SYS
= 1A
V
DC
= 5V, V
PEN1
= V
PEN2
= 0V (USB 100mA mode),
I
SYS
= 200mA (BAT to SYS voltage drop during SYS
overload)
I
BAT
= 0mA
T
A
= +25°C
T
A
= -40°C to +85°C
R
ISET
= 1.89kΩ
R
ISET
= 3.15kΩ
R
ISET
= 7.87kΩ
675
50
4.179
4.158
-140
40
100
4.200
4.200
-100
1250
750
300
75
1.57
2
1.5
2.9
3.0
0.01
0.01
3.1
5
5
7.87
mA
kΩ
V/A
ms
V
µA
825
mA
80
150
4.221
4.242
-60
mΩ
mV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX8662/MAX8663
V
mV
BAT voltage drop to restart charging
I
SYS
= 0mA,
R
PSET
= 1.5kΩ,
V
PEN1
= V
PEN2
= 5V
BAT Prequalification Current
ISET Resistance Range
V
ISET
-to-I
BAT
Ratio
Charger Soft-Start Time
BAT Prequalification
Threshold
BAT Leakage Current
t
SS_CHG
R
ISET
V
BAT
= 2.5V, R
ISET
= 3.15kΩ (prequalification
current is 10% of fast-charge current)
Guaranteed by BAT charging current
(1.5A to 300mA)
R
ISET
= 3.15kΩ (ISET output voltage to actual
charge-current ratio)
Charge-current ramp time
V
BAT
rising, 180mV hysteresis
V
BAT
= 4.2V,
outputs disabled
I
BAT
where
CHG
goes
high, and top-off timer;
I
BAT
falling (7.5% of
fast-charge current)
I
BAT
falling (Note 3)
C
CT
= 0.068µF
t
PREQUAL
t
FST-CHG
t
TOP-OFF
From
CEN
high to end of prequalification charge,
V
BAT
= 2.5V, C
CT
= 0.068µF
From
CEN
high to end of fast charge,
C
CT
= 0.068µF
From
CHG
high to end of fast charge,
C
CT
= 0.068µF
(Note 4)
R
PSET
= 3kΩ
V
DC
= 0V
V
DC
= V
CEN
= 5V
CHG
and Top-Off Threshold
R
ISET
= 3.15kΩ
56.25
mA
Timer-Suspend Threshold
Timer Accuracy
Prequalification Time
Charge Time
Top-Off Time
Charger Thermal-Limit
Temperature
Charger Thermal-Limit Gain
250
-20
300
350
+20
mV
%
Min
Min
Min
°C
mA/°C
30
300
30
100
50
_______________________________________________________________________________________
3
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
MAX8662/MAX8663
ELECTRICAL CHARACTERISTICS (Input Limiter and Battery Charger) (continued)
(V
DC
= 5V, V
BAT
= 4V, V
CEN
= 0V, V
PEN_
= 5V, R
PSET
= 3kΩ, R
ISET
= 3.15kΩ, C
CT
= 0.068µF, T
A
= -40°C to +85°C, unless otherwise
noted.) (Note 1)
PARAMETER
THERMISTOR INPUT (THM)
THM Internal Pullup
Resistance
THM Resistance Threshold,
Hot
THM Resistance Threshold,
Cold
THM Resistance Threshold,
Disabled
Input Logic-High Level
Input Logic-Low Level
Logic Input-Leakage Current
Logic Output-Voltage Low
Logic Output-High Leakage
Current
V
LOGIC
= 0V to 5.5V, T
A
= +25°C
V
LOGIC
= 5.5V, T
A
= +85°C
I
SINK
= 1mA
V
LOGIC
= 5.5V
T
A
= +25°C
T
A
= +85°C
-1
+0.001
0.01
10
0.001
0.01
100
1
Resistance falling (1% hysteresis)
Resistance rising (1% hysteresis)
Resistance falling
3.73
26.98
270
10
3.97
28.7
300
4.21
30.42
330
kΩ
kΩ
kΩ
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC I/O (POK,
CHG,
PEN_, EN_, PWM,
CEN)
1.3
0.4
+1
V
V
µA
mV
µA
ELECTRICAL CHARACTERISTICS (Output Regulator)
(V
SYS_
= V
PV_
= V
IN45
= V
IN67
= 4.0V, V
BRT
= 1.25V, circuit of Figure 1, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYSTEM
SYS Operating Range
SYS Undervoltage Threshold
V
SYS
V
UVLO_SYS
V
SYS
rising, 100mV hysteresis
Extra supply current when at least one output is on
OUT1 on, V
PWM
= 0V
OUT2 on, V
PWM
= 0V
SYS Bias Current Additional
Regulator Supply Current
OUT3 on
Not including
SYS bias current
OUT4 on (current into IN45)
OUT5 on (current into IN45)
OUT6 on (current into IN67)
OUT7 on (current in IN67)
Internal Oscillator Frequency
BUCK REGULATOR 1
Supply Current
Output Voltage Range
Maximum Output Current
V
OUT1
I
OUT1
I
SYS
+ I
PV1
, no load,
not including SYS
bias current
V
PWM
= 0V
V
PWM
= 5V
0.98
1200
16
2.9
3.30
35
µA
mA
V
mA
PWM frequency of OUT1, OUT2, and OUT3
0.9
2.6
2.4
2.5
35
16
16
1
20
16
17
16
1.0
5.5
2.6
70
35
35
2
30
25
27
25
1.1
MHz
µA
mA
µA
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Guaranteed by FB accuracy
4
_______________________________________________________________________________________
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
ELECTRICAL CHARACTERISTICS (Output Regulator) (continued)
(V
SYS_
= V
PV_
= V
IN45
= V
IN67
= 4.0V, V
BRT
= 1.25V, circuit of Figure 1, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
FB Regulation Accuracy
FB1 Input Leakage Current
pMOS On-Resistance
nMOS On-Resistance
pMOS Current Limit
Skip Mode Transition Current
nMOS Zero-Cross Current
LX Leakage
Soft-Start Time
BUCK REGULATOR 2
Supply Current
Output Voltage Range
Maximum Output Current
FB Regulation Accuracy
FB2 Input Leakage Current
pMOS On-Resistance
nMOS On- Resistance
pMOS Current Limit
Skip Mode Transition Current
nMOS Zero-Cross Current
LX Leakage
Soft-Start Time
BOOST REGULATOR FOR LED DRIVER
Supply Current
Output Range
Minimum Duty Cycle
Maximum Duty Cycle
CS Regulation Voltage
OVP Regulation Voltage
OVP Sink Current
OVP Soft-Start Period
Time for I
OVP
to ramp from 0 to 20µA (Note 5)
V
OUT3
D
MIN
D
MAX
V
CS
Duty = 90%, I
LX3
= 0mA
90
0.29
1.225
19.2
At SYS, no load, not
including SYS bias current
Switching
V
SYS
10
92
0.32
1.250
20.0
1.25
0.35
1.275
20.8
1
30
mA
V
%
%
V
V
µA
ms
V
EN2
= 0V, V
SYS
= 5.5V,
T
A
= +25°C
V
LX2
= V
PV2
= 5.5V
V
LX2
= 0V, V
PV2
= 5.5V
-5.00
I
LX2
= 100mA
I
LX2
= 100mA
V
PV2
= 3.3V
V
PV2
= 2.6V
V
PV2
= 3.3V
V
PV2
= 2.6V
1.07
From V
FB2
= 0.98V, I
OUT2
= 0 to 600mA,
V
OUT2
= 0.98V to 3.3V
I
SYS
+ I
PV2
, no load, not
including SYS bias current
Guaranteed by FB accuracy
V
PWM
= 0V
V
PWM
= 5V
0.98
900
-3
0.01
0.2
0.3
0.2
0.3
1.30
90
25
0.01
-0.01
400
1.00
1.55
0.4
+3
0.10
0.4
16
2.1
3.30
35
µA
mA
V
mA
%
µA
Ω
Ω
A
mA
mA
µA
µs
V
EN1
= 0V, V
SYS
= 5.5V,
T
A
= +25°C
V
LX1
= V
PV1
= 5.5V
V
LX1
= 0V, V
PV1
= 5.5V
-5.00
I
LX1
= 100mA
I
LX1
= 100mA
V
PV1
= 3.3V
V
PV1
= 2.6V
V
PV1
= 3.3V
V
PV1
= 2.6V
1.4
SYMBOL
CONDITIONS
From V
FB1
= 0.98V, I
OUT1
= 0 to 1200mA,
V
OUT1
= 0.98V to 3.3V
MIN
-3
0.01
0.12
0.15
0.2
0.3
1.8
90
25
0.01
-0.01
400
1.00
2.2
0.4
TYP
MAX
+3
0.10
0.24
UNITS
%
µA
Ω
Ω
A
mA
mA
µA
µs
MAX8662/MAX8663
_______________________________________________________________________________________
5
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
