FeaTures
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LTC4099
I
2
C Controlled
USB Power Manager/Charger
with Overvoltage Protection
DescripTion
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Switching Regulator with Bat-Track™ Adaptive Output
Control Makes Optimal Use of Limited Input Power
I
2
C Port for Optimal System Performance and
Status Information
Input Overvoltage Protection
Bat-Track Control of External Step-Down Switching
Regulator Maximizes Efficiency from Automotive
and Other High Voltage Sources
Instant-On Operation with Low Battery
Optional Overtemperature Battery Conditioner
Improves High Temperature Battery Safety Margin
Ideal Diode Seamlessly Connects Battery When Input
Power is Limited or Unavailable
Full-Featured Li-Ion/Polymer Battery Charger
1.5A Maximum Charge Current with Thermal Limiting
Slew Control Reduces Switching EMI
20-Lead 3mm × 4mm × 0.75mm QFN Package
Media Players
Portable Navigation Devices
Smart Phones
Industrial Handhelds
Portable Medical Instruments
The LTC
®
4099 is an I
2
C controlled high efficiency USB
PowerPath™ controller and full-featured Li-Ion/Polymer
battery charger. It seamlessly manages power distribution
from multiple sources including USB, a wall adapter and
a Li-Ion/Polymer battery.
The LTC4099 automatically limits its input current for
USB compatibility. For automotive and other high volt-
age applications, the LTC4099 interfaces with an external
switching regulator. Both the USB input and the auxiliary
input controller feature Bat-Track optimized charging to
provide maximum power to the application and reduced
heat in high power density applications.
The I
2
C port allows digital control of important application
parameters including input current limit, charge current
and float voltage. Several status bits can also be read back
via I
2
C.
An overvoltage protection circuit guards the LTC4099
from high voltage damage on the low voltage V
BUS
pin.The
LTC4099 is available in a 20-Lead 3mm × 4mm × 0.75mm
QFN Package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. PowerPath, Bat-Track and ThinSOT are trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6522118, 6570372, 6700364, 6819094. Other patents
pending.
applicaTions
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Typical applicaTion
OVERVOLTAGE
USB PROTECTION
I
2
C Controlled High Efficiency Battery Charger/
USB Power Manager
V
BUS
OVGATE
OVSENS
2
I
2
C
CLPROG PROG
SW
V
OUT
LTC4099
BAT
BATSENS
NTCBIAS
GND
NTC
100k
T
POWER DISSIPATION (W)
3.3µH
10µF
SYSTEM
LOAD
10µF
Reduced Power Dissipation
vs Linear Battery Charger
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Li-Ion
4099 TA01a
LINEAR BATTERY
CHARGER
V
IN
= 5V
I
CHARGE
= 1A
ADDITIONAL POWER
AVAILABLE FOR CHARGING
6.2k
TO µCONTROLLER
SWITCHING BATTERY
CHARGER
0.1µF
3.01k
1.02k
100k
+
0
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4099 TA01b
BATTERY VOLTAGE (V)
4099fd
LTC4099
(Notes 1, 2, 3)
absoluTe MaxiMuM raTings
pin conFiguraTion
TOP VIEW
CLPROG
OVSENS
ACPR
SDA
16 SCL
15 DV
CC
21
GND
14 SW
13 V
BUS
12 V
OUT
11 BAT
7
PROG
8
IRQ
9 10
GND
IDGATE
V
BUS
, WALL (Transient) t < 1ms,
Duty Cycle < 1% ...................................... –0.3V to 7V
V
BUS
, WALL (Static), BAT, BATSENS, IRQ,
NTC, DV
CC
............................................... –0.3V to 6V
SDA, SCL .......... –0.3V to Max (V
BUS
, V
OUT
, BAT) + 0.3V
.
I
OVSENS
................................................................±10mA
I
CLPROG
....................................................................3mA
I
PROG
,
I
NTCBIAS
.........................................................2mA
I
OUT
, I
SW
, I
BAT
, I
VBUS
..............................................2.25A
Maximum Junction Temperature........................... 125°C
Operating Temperature Range.................. –40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
.
I
IRQ
........................................................................50mA
.
I
ACPR
......................................................................±5mA
20 19 18 17
OVGATE 1
NTC 2
NTCBIAS 3
V
C
4
WALL 5
BATSENS 6
T
JMAX
= 125°C, θ
JA
= 38°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
UDC PACKAGE
20-LEAD (3mm 4mm) PLASTIC QFN
orDer inForMaTion
LEAD FREE FINISH
LTC4099EPDC#PBF
LTC4099EUDC#PBF
TAPE AND REEL
LTC4099EPDC#TRPBF
LTC4099EUDC#TRPBF
PART MARKING
DQKT
LFPY
PACKAGE DESCRIPTION
20-Lead (3mm × 4mm) Plastic UTQFN
20-Lead (3mm × 4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C (OBSOLETE)
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
elecTrical characTerisTics
SYMBOL
V
BUS
I
BUS(LIM)
PARAMETER
Input Supply Voltage
Total Input Current
Input Power Supply
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, DV
CC
= 3.3V, R
PROG
= 1.02k, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
l
MIN
4.35
88
460
580
725
920
1150
0.30
1.6
TYP
MAX
5.5
UNITS
V
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
100mA Mode
500mA Mode
620mA Mode
790mA Mode
1A Mode
1.2A Mode
Low Power Suspend Mode
High Power Suspend Mode
100mA Mode
500mA, 620mA, 790mA, 1A, 1.2A Modes
Low Power Suspend Mode
High Power Suspend Mode
l
l
l
l
93
485
620
790
965
1220
0.37
2.05
6
15
0.039
0.037
100
500
650
850
1000
1295
0.5
2.5
I
VBUSQ
(Note 4) Input Quiescent Current
4099fd
LTC4099
elecTrical characTerisTics
SYMBOL
h
CLPROG
(Note 4)
PARAMETER
Ratio of Measured V
BUS
Current to
CLPROG Program Current
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, DV
CC
= 3.3V, R
PROG
= 1.02k, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
100mA Mode
500mA Mode
620mA Mode
790mA Mode
1A Mode
1.2A Mode
Low Power Suspend Mode
High Power Suspend Mode
0.23
1.6
MIN
TYP
220
1200
1540
1980
2420
3080
10.9
65
135
672
840
1080
1251
1550
0.30
2.16
1.18
102
3.90
4.30
4.00
200
50
4.3
3.5
4.5
1.96
4.5
3.6
4.6
2.25
0.18
0.30
500mA to 1.2A Input Limit Modes
3
16
4.200V Setting Selected by I
2
C
l
MAX
UNITS
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
I
VOUT
V
OUT
Current Available Before Discharging 100mA Mode, BAT = 3.3V
Battery
500mA Mode, BAT = 3.3V
620mA Mode, BAT = 3.3V
790mA Mode, BAT = 3.3V
1A Mode, BAT = 3.3V
1.2A Mode, BAT = 3.3V
Low Power Suspend Mode
High Power Suspend Mode
CLPROG Servo Voltage in Current Limit
V
BUS
Undervoltage Lockout
V
BUS
to BAT Differential Undervoltage
Lockout
V
OUT
Voltage
Switching Modes
Suspend Modes
Rising Threshold
Falling Threshold
V
BUS–BAT
Rising Threshold
V
BUS–BAT
Falling Threshold
Switching Modes, BAT = 4.2V,
I
VOUT
= 0mA, Battery Charger Off
Switching Modes, BAT < 3.0V,
I
VOUT
= 0mA, Battery Charger Off
USB Suspend Modes, I
VOUT
= 250µA
0.41
2.46
mA
mA
mA
mA
mA
mA
mA
mA
V
mV
V
CLPROG
V
UVLO
V
DUVLO
V
OUT
4.35
V
V
mV
mV
4.7
3.75
4.7
2.65
V
V
V
MHz
Ω
Ω
A
Ω
f
OSC
R
PMOS
R
NMOS
I
PEAK
R
SUSP
Battery Charger
V
FLOAT
Switching Frequency
PMOS On-Resistance
NMOS On-Resistance
Peak Inductor Current Clamp
Suspend LDO Output Resistance
BAT Regulated Output Voltage
4.179
4.165
4.079
4.065
4.200
4.200
4.100
4.100
500-1200
4.221
4.235
4.121
4.135
V
V
V
V
mA
4.100V Default Setting
l
I
CHG_RANGE
I
CHG500mA
I
CHG1200mA
I
CHG_STEP
I
BATQ
Constant-Current Mode Charge Current
Range
Zero-Scale Battery Charge Current
Full-Scale Battery Charge Current
Charge Current I
2
C Step Size
Battery Drain Current
I
LIM2/1/0
= 101, Selectable by I
2
C
I
LIM2/1/0
= 101, I
CHARGE2/1/0
= 000
I
LIM2/1/0
= 101, I
CHARGE2/1/0
= 111
I
LIM2/1/0
= 101
V
BUS
> V
UVLO
, Battery Charger Off,
I
VOUT
= 0µA
V
BUS
= 0V, I
VOUT
= 0µA
(Ideal Diode Mode)
475
1100
500
1200
100
3.7
23
525
1300
5
35
mA
mA
mA
µA
µA
4099fd
LTC4099
elecTrical characTerisTics
SYMBOL
V
PROG,TRKL
h
PROG
V
TRKL
ΔV
TRKL
V
RECHRG
t
TERM_RANGE
t
BADBAT
V
C/x
PARAMETER
PROG Pin Servo Voltage in Trickle Charge
Ratio of I
BAT
to PROG Pin Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
Recharge Battery Threshold Voltage
Safety Timer Termination Period Range
Bad Battery Termination Time
Full Capacity Charge Indication PROG
Voltage (Note 5)
Threshold Voltage Relative to V
FLOAT
Selectable by I
2
C, Timer Starts When
BAT = V
FLOAT
BAT < V
TRKL
COVERX1/0 = 00
COVERX1/0 = 01
COVERX1/0 = 10
COVERX1/0 = 11
R
ON_CHG
T
LIM
Battery Charger Power FET
On-Resistance (Between V
OUT
and BAT)
Junction Temperature in Constant
Temperature Mode
Absolute WALL Input Threshold
Differential WALL Input Threshold
Regulation Target Under V
C
Control
WALL Quiescent Current
ACPR Pull-Down Strength
ACPR High Voltage
ACPR Low Voltage
Overvoltage Protection Threshold
OVGATE Output Voltage
OVGATE Voltage with 1µA Load
OVSENS Quiescent Current
OVGATE Time to Reach Regulation
Overtemperature Battery Discharge
Current
Maximum Allowed Overtemperature
Battery Voltage
I
ACPR
= 0mA
I
ACPR
= 0mA
Rising Threshold, R
OVSENS
= 6.2k
Input Below V
OVCUTOFF
Input Above V
OVCUTOFF
5V Through 6.2k into OVSENS
V
OVSENS
= 5V
C
OVGATE
= 1nF
Only When Enabled via I
2
C Control,
BAT = 4.2V
Only When Enabled via I
2
C Control
8
6.10
I
BAT
= 200mA
Selectable by I
2
C
0.4
90
40
190
490
–75
BAT Rising
2.7
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, DV
CC
= 3.3V, R
PROG
= 1.02k, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
BAT < V
TRKL
MIN
TYP
0.100
1030
2.85
130
–100
1-8
0.5
100
50
200
500
0.18
85, 105
0.6
110
60
210
510
–125
3
MAX
UNITS
V
mA/mA
V
mV
mV
Hour
Hour
mV
mV
mV
mV
Ω
°C
Bat-Track External Switching Regulator Control
V
WALL
ΔV
WALL
V
OUT
I
WALLQ
R
ACPR
VH
ACPR
VL
ACPR
V
OVCUTOFF
V
OVGATE
V
OVGATELOAD
I
OVSENSQ
t
RISE
I
DISCHARGE
V
ALLOW
Rising Threshold
Falling Threshold
WALL–BAT Rising Threshold
WALL–BAT Falling Threshold
4.15
0
3.5
4.3
3.2
90
37
BAT + 0.3
130
150
V
OUT
0
6.35
6.70
4.45
50
V
V
mV
mV
V
µA
Ω
V
V
V
V
V
V
µA
ms
mA
V
Overvoltage Protection
1.88 • V
OVSENS
12
0
8.6
40
2.5
180
3.85
Overtemperature Battery Conditioner
4099fd
LTC4099
elecTrical characTerisTics
SYMBOL
NTC
V
TOO_COLD
V
TOO_WARM
V
OVERTEMP
I
NTC
Ideal Diode
V
FWD
R
DROPOUT
I
MAX
I
2
C Port
DV
CC
I
DVCCQ
V
DVCC_UVLO
ADDRESS
I
2
C Logic Reference
DV
CC
Current
DV
CC
UVLO
I
2
C Address
SCL/SDA = 0kHz
1.6
0.2
1
5.5
V
µA
V
Forward Voltage
Internal Diode On-Resistance, Dropout
Diode Current Limit
I
VOUT
= 10mA
I
VOUT
= 200mA
2
15
0.18
mV
Ω
A
Cold Temperature Fault Threshold Voltage Rising Threshold
Hysteresis
Hot Temperature Fault Threshold Voltage
Critically High Temperature Fault
Threshold Voltage
NTC Leakage Current
Falling Threshold
Hysteresis
Falling Threshold
Hysteresis
NTC = NTCBIAS
72.3
31.3
21.9
–50
73.8
3.6
32.6
3.3
22.8
50
75.3 %NTCBIAS
%NTCBIAS
33.9 %NTCBIAS
%NTCBIAS
23.7 %NTCBIAS
mV
50
nA
PARAMETER
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, DV
CC
= 3.3V, R
PROG
= 1.02k, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
MIN
TYP
MAX
UNITS
R
0001001
W
I
IRQ
= 5mA
V
IRQ
= 5V
0.7 •
DV
CC
0.3 •
DV
CC
SDA, SCL = DV
CC
SDA, SCL = 0V
I
SDA
= 3mA
1.3
0.6
0.6
0.6
0
0
100
1.3
0.6
50
900
–1
–1
1
1
0.4
400
65
0
100
1
mV
µA
V
V
µA
µA
V
kHz
µs
µs
µs
µs
ns
ns
ns
µs
µs
ns
V
IRQ
I
IRQ
V
IH
, SDA, SCL
V
IL
, SDA, SCL
I
IH
, SDA, SCL
I
IL
, SDA, SCL
V
OL
f
SCL
t
BUF
t
HD_SDA
t
SU_SDA
t
SU_STO
t
HD_DAT(OUT)
t
HD_DAT(IN)
t
SU_DAT
t
LOW
t
HIGH
t
SP
IRQ Pin Output Low Voltage
IRQ Pin Leakage Current
Input High Threshold
Input Low Threshold
Input Leakage High
Input Leakage Low
Digital Output Low (SDA)
Clock Operating Frequency
Bus Free Time Between Stop and Start
Condition
Hold Time After (Repeated) Start
Condition
Repeated Start Condition Set-Up Time
Stop Condition Time
Data Hold Time
Input Data Hold Time
Data Set-Up Time
Clock Low Period
Clock High Period
Spike Suppression Time
4099fd
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