19-4166; Rev 1; 4/09
KIT
ATION
EVALU
BLE
AVAILA
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
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.
♦
♦
♦
♦
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
♦
♦
♦
♦
♦
Typical Operating Circuit
USB/AC-TO-DC
ADAPTER
DC
DLIM1
DLIM2
BAT
+
ENABLE SYSTEM
ENABLE CHARGER
ENABLE BACKLIGHT
SYS
EN123
CEN
EN4
LX4
OVP4
LX2
LX1
OUT1
I/O
Li+/Li-Poly
BATTERY
SYS
Applications
MP3 Players
Portable GPS Devices
Low-Power Handheld Products
Cellular Telephones
Digital Cameras
Handheld Instrumentation
PDAs
MAX8819_
Ordering Information
PART
MAX8819AETI+
MAX8819BETI+
MAX8819CETI+
TEMP RANGE
PIN-
PACKAGE
SYS
VOLTAGE
(V)
4.35
5.3
4.35
FB4
LX3
OUT2
MEMORY
OUT3
CORE
-40°C to +85°C 28 TQFN-EP*
-40°C to +85°C 28 TQFN-EP*
-40°C to +85°C 28 TQFN-EP*
CISET
CHG
RST1
CHG
RST1
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
Pin Configuration appears at end of data sheet.
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.
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
MAX8819A/MAX8819B/MAX8819C
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.
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
(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)
PARAMETER
DC POWER INPUT
DC Voltage Range
SYS Regulation Voltage
DC Undervoltage Threshold
DC Overvoltage Threshold
DC Current Limit
(Note 4)
V
DC
V
SYS_REG
V
UVLO_DC
V
OVLO_DC
I
DCLIM
V
DC
= 5.75V
MAX8819A/MAX8819C
MAX8819B
4.1
4.3
5.1
3.95
5.811
90
450
900
4.35
5.3
4.00
5.9
95
475
1000
0.02
1.33
5.5
4.4
5.5
4.05
6.000
100
500
1100
0.035
mA
V
V
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
DC
rising, 500mV typical hysteresis
V
DC
rising, 300mV typical hysteresis
V
DC
= 5.75V, V
SYS
= 5V
DLIM[1:2] = 10
for MAX8819B or V
SYS
=
DLIM[1:2] = 01
4V for MAX8819A/
DLIM[1:2] = 00
MAX8819C
DLIM[1:2] = 11 (suspend)
DLIM[1:2]
≠
11, I
SYS
= 0mA, I
BAT
= 0mA,
EN123 = low, EN4 = low, CEN = high,
V
DC
= 5.5V
DLIM[1:2]
≠
11, I
SYS
= 0mA, EN123 = low,
EN4 = low, CEN = low, V
DC
= 5.5V
DC Quiescent Current
I
DCIQ
mA
0.95
0.330
1.5
0.700
Ω
ms
°C
%/°C
DC-to-SYS Dropout Resistance
DC-to-SYS Soft-Start Time
DC Thermal-Limit Temperature
DC Thermal-Limit Gain
SYSTEM
System Operating Voltage Range
R
DS
t
SS-D-S
V
DC
= 4V, I
SYS
= 400mA, DLIM[1:2] = 01
Die temperature where current limit is
reduced
Amount of input current reduction above
thermal-limit temperature
100
5
V
SYS
2.6
5.5
V
2
_______________________________________________________________________________________
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
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)
PARAMETER
System Undervoltage Lockout
Threshold
BAT-to-SYS Reverse Regulation
Voltage
SYMBOL
CONDITIONS
MIN
2.45
TYP
2.5
MAX
2.55
UNITS
V
MAX8819A/MAX8819B/MAX8819C
V
UVLO_SYS
V
SYS
falling, 100mV hysteresis
DC and BAT are delivering current to SYS;
I
BAT
= 95mA; V
DC
= 4.3V,
MAX8819A/MAX8819C (only)
V
DC
= 0V, EN123 = low, EN4 = low,
V
BAT
= 4V
V
DC
= 5V, DLIM[1:2]
≠
11, EN123 = low,
EN4 = low, V
BAT
= 4V
V
DC
= 0V, EN123 = high, EN4 = low,
V
BAT
= 4V (step-down converters are not in
dropout)
V
DC
= 0V, EN123 = high, EN4 = high,
V
BAT
= 4V (step-down converters are not in
dropout)
V
BSREG
50
66
90
mV
10
0
20
10
μA
Quiescent Current
I
SYS
+
I
PV13
+
I
PV2
128
290
362
730
BATTERY CHARGER (V
DC
= 5.0V)
BAT-to-SYS On-Resistance
BAT Regulation Voltage
(Figure 2)
BAT Recharge Threshold
BAT Prequalification Threshold
R
CISET
Resistance Range
CISET Voltage
V
CISET
V
BATPRQ
R
BS
V
BATREG
V
DC
= 0V, V
BAT
= 4.2V, I
SYS
= 0.9A
T
A
= +25°C
T
A
= -40°C to +85°C
(Note 4)
V
BAT
rising, 180mV hysteresis, Figure 2
Guaranteed by BAT fast-charge current
limit
R
CISET
= 7.5kΩ, I
BAT
= 267mA
DLIM[1:2] = 10, R
CISET
= 3kΩ
DLIM[1:2] = 01, R
CISET
= 3kΩ
BAT Fast-Charge Current Limit
I
CHGMAX
DLIM[1:2] = 00, R
CISET
= 15kΩ
DLIM[1:2] = 00, R
CISET
= 7.5kΩ
DLIM[1:2] = 00, R
CISET
= 3.74kΩ
BAT Prequalification Current
Top-Off Threshold (Note 5)
I
PREQUAL
I
TOPOFF
V
BAT
= 2.5V, R
CISET
= 3.74kΩ
T
A
= +25°C, R
CISET
= 3.74kΩ
V
DC
= 0V, EN123 = low, EN4 = low,
CEN = low, V
BAT
= 4V
V
DC
= 5V, DLIM[1:2] = 11, EN123 = low,
EN4 = low, V
BAT
= 4V
4.174
4.158
-135
2.9
3
0.9
87
450
170
375
740
60
60
1.0
92
472
200
400
802
82
82
10
0
0.073
4.200
4.200
-100
3.0
0.165
4.221
4.242
-65
3.1
15
1.1
100
500
230
425
860
105
105
20
μA
mA
mA
mA
Ω
V
mV
V
kΩ
V
BAT Leakage Current
_______________________________________________________________________________________
3
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
MAX8819A/MAX8819B/MAX8819C
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)
PARAMETER
SYMBOL
Slew rate
Charger Soft-Start Time
t
SS_CHG
Time from 0 to 500mA
Time from 0 to 100mA
Time from 100mA to 500mA
Timer Accuracy
Timer Suspend Threshold
CISET voltage when the fast-charge timer
suspends; 300mV translates to 20% of the
maximum fast-charge current limit
CISET voltage when the fast-charge timer
extends; 750mV translates to 50% of the
maximum fast-charge current limit
t
PREQUAL
t
FSTCHG
t
TOPOFF
t
SS1
, t
SS2
,
t
SS3
t
SS4
C
COMP4
= 0.022μF to GND
T
J
rising
250
300
CONDITIONS
MIN
TYP
333
1.5
0.3
1.2
+15
350
%
mV
ms
MAX
UNITS
mA/ms
Timer Extend Threshold
Prequalification Time
Fast-Charge Time
Top-Off Time
REG1, REG2, REG3 Soft-Start
Time
REG4 Soft-Start Time
REGULATOR THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
700
750
33
660
33
800
mV
min
min
min
POWER SEQUENCING (Figures 6 and 7)
2.6
5
+165
15
PV13 supplied from SYS
L = 4.7μH,
R
LSR
= 0.13Ω
(Note 6)
MAX8819A/MAX8819B
MAX8819C
400
mA
550
600
230
f
OSC
/3
(Note 7)
T
A
= +25°C
T
A
= +85°C
0.997
1
V
FB1
= 1.01V
-50
-5
-10
1
1
190
250
0.565
0.615
0.600
0.650
0.640
0.750
1.01
1.028
V
SYS
+50
mA
mV
Hz
V
V
nA
%
%/D
mΩ
mΩ
A
V
SYS
ms
ms
°C
°C
V
REG1–SYNCHRONOUS STEP-DOWN CONVERTER
Input Voltage
Maximum Output Current
Short-Circuit Current
Short-Circuit Detection Threshold
Short-Circuit Foldback Frequency
FB1 Voltage
Output Voltage Range
FB1 Leakage Current
Load Regulation
Line Regulation
p-Channel On-Resistance
n-Channel On-Resistance
p-Channel Current-Limit
Threshold
L = 4.7μH, R
LSR
= 0.13Ω
I
OUT1
= 100mA to 300mA
(Note 9)
V
PV13
= 4.0V, I
LX1
= 180mA
V
PV13
= 4.0V, I
LX1
= 180mA
MAX8819A/MAX8819B
MAX8819C
4
_______________________________________________________________________________________
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
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)
PARAMETER
Skip-Mode Transition Current
n-Channel Zero-Crossing
Threshold
Maximum Duty Cycle
Minimum Duty Cycle
PWM Frequency
Internal Discharge Resistance in
Shutdown
Input Voltage
Maximum Output Current
Short-Circuit Current
Short-Circuit Detection Threshold
Short-Circuit Foldback Frequency
FB2 Voltage
Output Voltage Range
FB2 Leakage Current
Load Regulation
Line Regulation
p-Channel On-Resistance
n-Channel On-Resistance
p-Channel Current-Limit
Threshold
Skip-Mode Transition Current
n-Channel Zero-Crossing
Threshold
Maximum Duty Cycle
Minimum Duty Cycle
PWM Frequency
Internal Discharge Resistance in
Shutdown
REG2 Disable
Input Voltage
ΔI
SYS
f
OSC
EN123 = low, resistance from LX2 to PG2
V
PV2
= 0V, REG2 disabled (Note 10)
PV13 supplied from SYS
1.8
100
12.5
2.0
1.0
-25
V
SYS
2.2
V
FB2
= 1.01V
T
A
= +25°C
T
A
= +85°C
(Note 7)
0.997
1
-50
-5
-50
1
1
290
200
0.512
0.565
0.550
0.600
80
10
0.595
0.700
f
OSC
EN123 = low, resistance from LX1 to PG1
1.8
100
12.5
2.0
1.0
2.2
SYMBOL
(Note 8)
CONDITIONS
MIN
TYP
80
10
MAX
UNITS
mA
mA
%
%
MHz
kΩ
MAX8819A/MAX8819B/MAX8819C
REG2–SYNCHRONOUS STEP-DOWN CONVERTER
PV2 supplied from SYS
L = 4.7μH,
R
LSR
= 0.13Ω
(Note 6)
MAX8819A/MAX8819B
MAX8819C
300
mA
500
600
230
f
OSC
/3
1.012
1.028
V
SYS
+50
mA
mV
Hz
V
V
nA
%
%/D
mΩ
mΩ
A
mA
mA
%
%
MHz
kΩ
μA
V
V
SYS
V
L = 4.7μH, R
LSR
= 0.13Ω
I
OUT2
= 100mA to 300mA
(Note 9)
V
PV2
= 4.0V, I
LX2
= 180mA
V
PV2
= 4.0V, I
LX2
= 180mA
MAX8819A/MAX8819B
MAX8819C
(Note 8)
REG3–SYNCHRONOUS STEP-DOWN CONVERTER
_______________________________________________________________________________________
5
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