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MAX8819CETI+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29
General Description
The MAX8819_ is a complete power solution for MP3
players and other handheld applications. The IC
includes a battery charger, step-down converters, and
WLED power. It features an input current-limit switch to
power the IC from an AC-to-DC adapter or USB port, a
1-cell lithium ion (Li+) or lithium polymer (Li-Poly) charg-
er, three step-down converters, and a step-up converter
with serial step dimming for powering two to six white
LEDs. All power switches for charging and switching the
system load between battery and external power are
included on-chip. No external MOSFETs are required.
The MAX8819C offers a sequenced power-up/power-
down of OUT1, OUT2, and then OUT3.
Maxim’s Smart Power Selector™ makes the best use of
AC-to-DC adapter power or limited USB power. Battery
charge current and input current limit are independent-
ly set. Input power not used by the system charges the
battery. Charge current is resistor programmable and
the input current limit can be selected as 100mA,
500mA, or 1A. Automatic input selection switches the
system load from battery to external power. In addition,
on-chip thermal limiting reduces the battery charge rate
to prevent charger overheating.
Applications
MP3 Players
Portable GPS Devices
Low-Power Handheld Products
Cellular Telephones
Digital Cameras
Handheld Instrumentation
PDAs
Features
♦ Smart Power Selector
♦ Operates with No Battery Present
♦ USB/AC Adapter One-Cell Li+ Charger
♦ Three 2MHz Step-Down Converters
95% Peak Efficiency
100% Duty Cycle
±3% Output Accuracy over Load/Line/
Temperature
♦ 2 to 6 Series WLED Driver with Dimming Control
♦ Active-Low REG1 Reset Output
♦ Short-Circuit/Thermal-Overload/Input
Undervoltage/Overvoltage Protection
♦ Power-Up/Down Sequencing (MAX8819C)
♦ Total Solution Size: Less Than 90mm
2
MAX8819A/MAX8819B/MAX8819C
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
________________________________________________________________
Maxim Integrated Products
1
19-4166; Rev 1; 4/09
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.
EVALUATION KIT
AVAILABLE
Pin Configuration appears at end of data sheet.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
USB/AC-TO-DC
ADAPTER
ENABLE SYSTEM
ENABLE CHARGER
ENABLE BACKLIGHT
SYS
DC
DLIM1
DLIM2
EN123
CEN
EN4
LX4
OVP4
FB4
LX3
LX2
CISET
BAT
SYS
Li+/Li-Poly
BATTERY
OUT1
I/O
OUT2
MEMORY
OUT3
CORE
CHG CHG
LX1
RST1
RST1
MAX8819_
+
Typical Operating Circuit
Ordering Information
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
PART
TEMP RANGE
PIN-
PACKAGE
SYS
VOLTAGE
(V)
MAX8819AETI+
-40°C to +85°C 28 TQFN-EP*
4.35
MAX8819BETI+
-40°C to +85°C 28 TQFN-EP*
5.3
MAX8819CETI+
-40°C to +85°C 28 TQFN-EP*
4.35
MAX8819A/MAX8819B/MAX8819C
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
2 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(DC, LX_ unconnected; V
EP
= V
GND
= 0V, V
BAT
= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V
FB1
= V
FB2
= V
FB3
= 1.1V, V
FB4
= 0.6V,
PV13 = PV2 = SYS, T
A
= -40°C to +85°C, capacitors as shown in Figure 1, R
CISET
= 3kΩ, unless otherwise noted.) (Note 3)
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC POWER INPUT
DC Voltage Range V
DC
4.1 5.5 V
MAX8819A/MAX8819C 4.3 4.35 4.4
SYS Regulation Voltage V
SYS_REG
V
DC
= 5.75V
MAX8819B 5.1 5.3 5.5
V
DC Undervoltage Threshold V
UVLO_DC
V
DC
rising, 500mV typical hysteresis 3.95 4.00 4.05 V
DC Overvoltage Threshold V
OVLO_DC
V
DC
rising, 300mV typical hysteresis 5.811 5.9 6.000 V
DLIM[1:2] = 10 90 95 100
DLIM[1:2] = 01 450 475 500
DC Current Limit
(Note 4)
I
DCLIM
V
DC
= 5.75V, V
SYS
= 5V
for MAX8819B or V
SYS
=
4V for MAX8819A/
MAX8819C
DLIM[1:2] = 00 900 1000 1100
mA
DLIM[1:2] = 11 (suspend) 0.02 0.035
DLIM[1:2] ≠ 11, I
SYS
= 0mA, I
BAT
= 0mA,
EN123 = low, EN4 = low, CEN = high,
V
DC
= 5.5V
1.33
DC Quiescent Current I
DCIQ
DLIM[1:2] ≠ 11, I
SYS
= 0mA, EN123 = low,
EN4 = low, CEN = low, V
DC
= 5.5V
0.95
mA
DC-to-SYS Dropout Resistance R
DS
V
DC
= 4V, I
SYS
= 400mA, DLIM[1:2] = 01 0.330 0.700 Ω
DC-to-SYS Soft-Start Time t
SS-D-S
1.5 ms
DC Thermal-Limit Temperature
Die temperature where current limit is
reduced
100 °C
DC Thermal-Limit Gain
Amount of input current reduction above
thermal-limit temperature
5%/°C
SYSTEM
System Operating Voltage Range V
SYS
2.6 5.5 V
ABSOLUTE MAXIMUM RATINGS
DC, SYS, BAT, CISET, DLIM1, DLIM2, EN123
CEN, EN4, CHG, RST1, FB1, FB2, FB3 to GND....-0.3V to +6V
PV2 to GND...............................................-0.3V to (V
SYS
+ 0.3V)
PV13 to SYS...........................................................-0.3V to +0.3V
PG1, PG2, PG3, PG4 to GND................................-0.3V to +0.3V
COMP4, FB4 to GND ................................-0.3V to (V
SYS
+ 0.3V)
LX4 to PG4 .............................................................-0.3V to +33V
OVP4 to GND .........................................................-0.3V to +33V
LX1, LX2, LX3 Continuous Current (Note 1) .........................1.5A
LX4 Current ................................................................750mA
RMS
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN Single-Layer Board (derate 20.8mW/°C
above +70°C)...........................................................1666.7mW
28-Pin Thin QFN Multilayer Board (derate 28.6mW/°C
above +70°C)...........................................................2285.7mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 2)
28-Lead Thin QFN...........................................................3°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature........................................-40°C to +125°C
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: LX1, LX2, LX3 have clamp diodes to their respective PG_ and PV_. Applications that forward bias these diodes must take
care not to exceed the package power dissipation limits.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to http://www.maxim-ic.com/thermal-tutorial
.
MAX8819A/MAX8819B/MAX8819C
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
System Undervoltage Lockout
Threshold
V
UVLO_SYS
V
SYS
falling, 100mV hysteresis 2.45 2.5 2.55 V
BAT-to-SYS Reverse Regulation
Voltage
V
BSREG
DC and BAT are delivering current to SYS;
I
BAT
= 95mA; V
DC
= 4.3V,
MAX8819A/MAX8819C (only)
50 66 90 mV
V
DC
= 0V, EN123 = low, EN4 = low,
V
BAT
= 4V
10 20
V
DC
= 5V, DLIM[1:2] ≠ 11, EN123 = low,
EN4 = low, V
BAT
= 4V
010
V
DC
= 0V, EN123 = high, EN4 = low,
V
BAT
= 4V (step-down converters are not in
dropout)
128 290
Quiescent Current
I
SYS
+
I
PV13
+
I
PV2
V
DC
= 0V, EN123 = high, EN4 = high,
V
BAT
= 4V (step-down converters are not in
dropout)
362 730
μA
BATTERY CHARGER (V
DC
= 5.0V)
BAT-to-SYS On-Resistance R
BS
V
DC
= 0V, V
BAT
= 4.2V, I
SYS
= 0.9A 0.073 0.165 Ω
T
A
= +25°C 4.174 4.200 4.221
BAT Regulation Voltage
(Figure 2)
V
BATREG
T
A
= -40°C to +85°C 4.158 4.200 4.242
V
BAT Recharge Threshold (Note 4) -135 -100 -65 mV
BAT Prequalification Threshold V
BATPRQ
V
BAT
rising, 180mV hysteresis, Figure 2 2.9 3.0 3.1 V
R
CISET
Resistance Range
Guaranteed by BAT fast-charge current
limit
315kΩ
CISET Voltage V
CISET
R
CISET
= 7.5kΩ, I
BAT
= 267mA 0.9 1.0 1.1 V
DLIM[1:2] = 10, R
CISET
= 3kΩ 87 92 100
DLIM[1:2] = 01, R
CISET
= 3kΩ 450 472 500
DLIM[1:2] = 00, R
CISET
= 15kΩ 170 200 230
DLIM[1:2] = 00, R
CISET
= 7.5kΩ 375 400 425
BAT Fast-Charge Current Limit I
CHGMAX
DLIM[1:2] = 00, R
CISET
= 3.74kΩ 740 802 860
mA
BAT Prequalification Current I
PREQUAL
V
BAT
= 2.5V, R
CISET
= 3.74kΩ 60 82 105 mA
Top-Off Threshold (Note 5) I
TOPOFF
T
A
= +25°C, R
CISET
= 3.74kΩ 60 82 105 mA
V
DC
= 0V, EN123 = low, EN4 = low,
CEN = low, V
BAT
= 4V
10 20
BAT Leakage Current
V
DC
= 5V, DLIM[1:2] = 11, EN123 = low,
EN4 = low, V
BAT
= 4V
0
μA
ELECTRICAL CHARACTERISTICS (continued)
(DC, LX_ unconnected; V
EP
= V
GND
= 0V, V
BAT
= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V
FB1
= V
FB2
= V
FB3
= 1.1V, V
FB4
= 0.6V,
PV13 = PV2 = SYS, T
A
= -40°C to +85°C, capacitors as shown in Figure 1, R
CISET
= 3kΩ, unless otherwise noted.) (Note 3)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29

MAX8819CETI+

Mfr. #:
Buy MAX8819CETI+
Manufacturer:
Maxim Integrated
Description:
Power Management Specialized - PMIC PMIC w/Charger & Smart Power Selector
Lifecycle:
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