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Linear Technology Electronic Components Datasheet

LTC4099EPDC Datasheet

I2C Controlled USB Power Manager/Charger

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LTC4099
I2C Controlled
USB Power Manager/Charger
with Overvoltage Protection
Features
n Switching Regulator with Bat-Track™ Adaptive Output
Control Makes Optimal Use of Limited Input Power
n I2C Port for Optimal System Performance and
Status Information
n Input Overvoltage Protection
n Bat-Track Control of External Step-Down Switching
Regulator Maximizes Efficiency from Automotive
and Other High Voltage Sources
n Instant-On Operation with Low Battery
n Optional Overtemperature Battery Conditioner
Improves High Temperature Battery Safety Margin
n Ideal Diode Seamlessly Connects Battery When Input
Power is Limited or Unavailable
n Full-Featured Li-Ion/Polymer Battery Charger
n 1.5A Maximum Charge Current with Thermal Limiting
n Slew Control Reduces Switching EMI
n 20-Lead 3mm × 4mm × 0.75mm QFN Package
Applications
n Media Players
n Portable Navigation Devices
n Smart Phones
n Industrial Handhelds
n Portable Medical Instruments
Description
The LTC®4099 is an I2C 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 I2C 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 I2C.
An overvoltage protection circuit guards the LTC4099
from high voltage damage on the low voltage VBUS 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.
Typical Application
OVERVOLTAGE
USB PROTECTION
I2C Controlled High Efficiency Battery Charger/
USB Power Manager
VBUS
10µF
SW
VOUT
3.3µH
6.2k
OVGATE
LTC4099
BAT
OVSENS
BATSENS
2
TO µCONTROLLER
NTCBIAS
I2C CLPROG PROG GND NTC
100k
0.1µF 3.01k 1.02k
100k
T
+
Li-Ion
SYSTEM
LOAD
10µF
4099 TA01a
Reduced Power Dissipation
vs Linear Battery Charger
1.8
LINEAR BATTERY
VIN = 5V
1.6
CHARGER
ICHARGE = 1A
1.4
1.2
ADDITIONAL POWER
1.0 AVAILABLE FOR CHARGING
0.8
0.6
SWITCHING BATTERY
0.4
CHARGER
0.2
0
3.3 3.4 3.5 3.6 3.7 3.8 3.9
BATTERY VOLTAGE (V)
4 4.1
4099 TA01b
4099fd



Linear Technology Electronic Components Datasheet

LTC4099EPDC Datasheet

I2C Controlled USB Power Manager/Charger

No Preview Available !

LTC4099
Absolute Maximum Ratings
(Notes 1, 2, 3)
VBUS, WALL (Transient) t < 1ms,
Duty Cycle < 1%....................................... –0.3V to 7V
VBUS, WALL (Static), BAT, BATSENS, IRQ,
NTC, DVCC................................................ –0.3V to 6V
SDA, SCL........... –0.3V to Max (VBUS, VOUT, BAT) + 0.3V
IOVSENS.................................................................±10mA
ICLPROG.....................................................................3mA
IPROG, INTCBIAS..........................................................2mA
IOUT, ISW, IBAT, IVBUS...............................................2.25A
Maximum Junction Temperature........................... 125°C
Operating Temperature Range.................. –40°C to 85°C
Storage Temperature Range...................–65°C to 125°C
IIRQ.........................................................................50mA
IACPR.......................................................................±5mA
pIN CONFIGURATION
TOP VIEW
OVGATE 1
NTC 2
NTCBIAS 3
VC 4
WALL 5
BATSENS 6
20 19 18 17
16 SCL
15 DVCC
21
14 SW
GND
13 VBUS
12 VOUT
11 BAT
7 8 9 10
UDC PACKAGE
20-LEAD (3mm s 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 38°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC4099EPDC#PBF
LTC4099EPDC#TRPBF DQKT
20-Lead (3mm × 4mm) Plastic UTQFN
LTC4099EUDC#PBF
LTC4099EUDC#TRPBF LFPY
20-Lead (3mm × 4mm) Plastic QFN
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/
TEMPERATURE RANGE
–40°C to 85°C (OBSOLETE)
–40°C to 85°C
Electrical Characteristics The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, DVCC = 3.3V, RPROG = 1.02k, RCLPROG = 3.01k, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Input Power Supply
VBUS
IBUS(LIM)
Input Supply Voltage
Total Input Current
100mA Mode
500mA Mode
620mA Mode
790mA Mode
1A Mode
1.2A Mode
Low Power Suspend Mode
High Power Suspend Mode
l 4.35
5.5
V
l 88
93
100
mA
l 460
485
500
mA
580
620
650
mA
725
790
850
mA
920
965
1000
mA
1150
1220
1295
mA
l 0.30
0.37
0.5
mA
l 1.6
2.05
2.5
mA
IVBUSQ (Note 4) Input Quiescent Current
100mA Mode
500mA, 620mA, 790mA, 1A, 1.2A Modes
Low Power Suspend Mode
High Power Suspend Mode
6
mA
15
mA
0.039
mA
0.037
mA
4099fd



Part Number LTC4099EPDC
Description I2C Controlled USB Power Manager/Charger
Maker Linear
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