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PDF MAX8662 Data sheet ( Hoja de datos )
| Número de pieza | MAX8662 | |
| Descripción | (MAX8662 / MAX8663) Power Management IC | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-0732; Rev 0; 2/07
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
General Description
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 thin
QFN package, while the MAX8663, without the LED driver,
is available in a 5mm x 5mm, 40-pin thin QFN package.
Applications
Smart Phones and PDAs
MP3 and Portable Media Players
Palmtop and Wireless Handhelds
Pin Configurations
Features
♦ Two 95%-Efficient 1MHz Buck Regulators
Main Regulator: 0.98V to VIN at 1200mA
Core Regulator: 0.98V to VIN at 900mA
♦ 1MHz Boost WLED Driver
Drives Up to 7 White LEDs at 30mA (max)
PWM and Analog Dimming Control
♦ Four Low-Dropout Linear Regulators
1.7V to 5.5V Input Range
15µA Quiescent Current
♦ Single-Cell Li+ Charger
Adapter or USB Input
Thermal-Overload Protection
♦ Smart Power Selector (SPS)
AC Adapter/USB or Battery Source
Charger-Current and System-Load Sharing
Ordering Information
PART
TEMP
RANGE
PIN-PACKAGE
PKG
CODE
MAX8662ETM+
-40°C to
+85°C
48 Thin QFN-EP*
6mm x 6mm x 0.8mm
T4866-1
MAX8663ETL+
-40°C to 40 Thin QFN-EP*
T4055-1
+85°C 5mm x 5mm x 0.8mm
+Denotes a lead-free package.
*EP = Exposed paddle.
Typical Operating Circuit
TOP VIEW
36 35 34 33 32 31 30 29 28 27 26 25
EN6 37
EN7 38
LX3 39
PG3 40
OUT6 41
IN67 42
OUT7 43
VL 44
SL1 45
SL2 46
PSET 47
POK 48
MAX8662
24 FB1
23 PWM
22 EN5
21 EN4
20 OUT5
19 IN45
18 OUT4
17 GND
16 REF
15 CT
14 ISET
13 THM
1 2 3 4 5 6 7 8 9 10 11 12
DC/USB
INPUT
PWR OK
CHARGE
STATUS
CHARGE
ENABLE
OUT4–OUT7
VOLTAGE
SELECT
DC SYS
BAT
POK
CHG MAX8662
MAX8663 LX1
CEN
LX2
EN1
LX3
EN2
EN3
(MAX8662 ONLY)
EN4
EN5 CS
EN6
OUT4
EN7
OUT5
SL1 OUT6
SL2 OUT7
TO SYSTEM
POWER
Li+
BATTERY
OUT1
0.98V TO VIN / 1.2A
OUT2
0.98V TO VIN / 0.9A
TO SYS
OUT3
30mA
WLED
500mA
150mA
300mA
150mA
THIN QFN
(6mm x 6mm)
Pin Configurations continued at end of data sheet.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
www.DataSheet4U.com
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
ELECTRICAL CHARACTERISTICS (Output Regulator) (continued)
(VSYS_ = VPV_ = VIN45 = VIN67 = 4.0V, VBRT = 1.25V, circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
FB Regulation Accuracy
From VFB1 = 0.98V, IOUT1 = 0 to 1200mA,
VOUT1 = 0.98V to 3.3V
-3 +3 %
FB1 Input Leakage Current
0.01 0.10 µA
pMOS On-Resistance
nMOS On-Resistance
pMOS Current Limit
ILX1 = 100mA
ILX1 = 100mA
VPV1 = 3.3V
VPV1 = 2.6V
VPV1 = 3.3V
VPV1 = 2.6V
0.12 0.24
0.15
0.2 0.4
0.3
1.4 1.8 2.2
Ω
Ω
A
Skip Mode Transition Current
90 mA
nMOS Zero-Cross Current
25 mA
LX Leakage
BUCK REGULATOR 2
VEN1 = 0V, VSYS = 5.5V,
TA = +25°C
VLX1 = VPV1 = 5.5V
VLX1 = 0V, VPV1 = 5.5V
0.01
-5.00 -0.01
1.00
µA
Supply Current
Output Voltage Range
ISYS + IPV2, no load, not
including SYS bias current
VPWM = 0V
VPWM = 5V
Guaranteed by FB accuracy
16 35 µA
2.1 mA
0.98 3.30 V
Maximum Output Current
900 mA
FB Regulation Accuracy
From VFB2 = 0.98V, IOUT2 = 0 to 600mA,
VOUT2 = 0.98V to 3.3V
-3 +3 %
FB2 Input Leakage Current
0.01 0.10 µA
pMOS On-Resistance
nMOS On- Resistance
pMOS Current Limit
ILX2 = 100mA
ILX2 = 100mA
VPV2 = 3.3V
VPV2 = 2.6V
VPV2 = 3.3V
VPV2 = 2.6V
0.2 0.4
0.3
0.2 0.4
0.3
1.07 1.30 1.55
Ω
Ω
A
Skip Mode Transition Current
90 mA
nMOS Zero-Cross Current
25 mA
LX Leakage
BOOST REGULATOR FOR LED DRIVER
VEN2 = 0V, VSYS = 5.5V,
TA = +25°C
VLX2 = VPV2 = 5.5V
VLX2 = 0V, VPV2 = 5.5V
0.01
-5.00 -0.01
1.00
µA
Supply Current
At SYS, no load, not
including SYS bias current
Switching
1 mA
Output Range
Minimum Duty Cycle
Maximum Duty Cycle
CS Regulation Voltage
OVP Regulation Voltage
OVP Sink Current
VOUT3
DMIN
DMAX
VCS
Duty = 90%, ILX3 = 0mA
VSYS
90
0.29
1.225
19.2
10
92
0.32
1.250
20.0
30
0.35
1.275
20.8
V
%
%
V
V
µA
OVP Soft-Start Period
Time for IOVP to ramp from 0 to 20µA
1.25 ms
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 =
VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT =
0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, GND = PG1 = PG2 = PG3 = 0, TA = +25°C, unless
otherwise noted.)
VOUT1
AC-COUPLED
OUT1 REGULATOR LIGHT-LOAD
SWITCHING WAVEFORMS
MAX8662/63 toc25
VBAT = 4.0V
IOUT1 = 10mA
50mV/div
VOUT1
AC-COUPLED
OUT1 REGULATOR HEAVY-LOAD
SWITCHING WAVEFORMS
MAX8662/63 toc26
10mV/div
VLX
2V/div
VLX
2V/div
IL
VLX
IOUT1
IL
VOUT1
20μs/div
200mA/div
PWM = 0
OUT1 REGULATOR LOAD-
TRANSIENT RESPONSE
MAX8662/63 toc27
5V/div
1A/div
1A/div
VBAT = 4.0V
IOUT1 = 10mA TO 1200mA TO 10mA
PWM = 0
100mV/div
IL
VBAT = 4.2V
IOUT1 = 1200mA
1μs/div
500mA/div
VSYS
VOUT1
OUT1 REGULATOR LINE-
TRANSIENT RESPONSE
MAX8662/63 toc28
5V
4V IOUT1 = 10mA
PWM = 0
1V/div
50mV/div
5V/div
VLX
IL 200mA/div
40μs/div
100μs/div
OUT1 ENABLE AND DISABLE RESPONSE
MAX8662/63 toc29
VEN1
2V/div
VOUT1
2V/div
1ms/div
IOUT1 = 10mA
100
90
80
70
60
50
40
30
20
10
0
0.1
OUT2 REGULATOR EFFICIENCY
vs. LOAD CURRENT
VBAT = 4.2V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 3.6V
PWM = 0
PWM = 1
VOUT1 = 3.3V
1 10 100
LOAD CURRENT (mA)
1000
OUT2 REGULATOR LOAD REGULATION
1.32
VBAT = 4.2V
1.31
1.30
1.29 VBAT = 3.6V
1.28
1.27
1.26
0.1
1 10 100 1000 10,000
LOAD CURRENT (mA)
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX8662.PDF ] | |
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