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Linear Technology Electronic Components Datasheet

LTC4088EDE-1 Datasheet

High Efficiency Battery Charger/USB Power Manager

No Preview Available !

LTC4088-1/LTC4088-2
High Efficiency Battery
Charger/USB Power Manager
with Regulated Output Voltage
Features
Description
n Switching Regulator Makes Optimal Use of Limited The LTC®4088-1/LTC4088-2 is a high efficiency USB
Power Available from USB Port to Charge Battery
PowerPath™ controller and Li-Ion/Polymer battery char-
and Power Application
ger. It includes a synchronous switching input regulator,
n 180mΩ Internal Ideal Diode Plus External Ideal Diode a full-featured battery charger and an ideal diode. De-
Controller Seamlessly Provide Low Loss Power Path signed specifically for USB applications, the LTC4088-1/
When Input Power is Limited or Unavailable
LTC4088-2’s switching regulator automatically limits its
n Automatic Charge Current Reduction Maintains 3.6V input current to either 100mA, 500mA or 1A via logic
Minimum VOUT
n Full Featured Li-Ion/Polymer Battery Charger
control. The LTC4088-1 powers-up with the charger off;
the LTC4088-2 powers-up with the charger on.
n
n
n
n
n
n
VBUS Operating Range: 4.25V to 5.5V (7V Absolute
Maximum—Transient)
1.2A Maximum Input Current Limit
1.5A Maximum Charge Current with Thermal Limiting
Bat-Track™ Adaptive Output Control
Slew Control Reduces Switching EMI
Low Profile (0.75mm) 14-Lead 4mm × 3mm DFN Package
The switching input stage provides power to VOUT where
power sharing between the application circuit and the
battery charger is managed. Charge current is automati-
cally reduced to maintain a regulated 3.6V VOUT during
low-battery conditions. As the battery is charged, VOUT
tracks VBAT for high efficiency charging. This feature al-
lows the LTC4088-1/LTC4088-2 to provide more power
Applications
n Media Players
n Digital Cameras
n GPS
n PDAs
to the application and eases thermal issues in constrained
applications.
An ideal diode ensures that system power is available
from the battery when the input current limit is reached
or if the USB or wall supply is removed.
n Smart Phones
The LTC4088-1/LTC4088-2 is available in the low profile
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath and Bat-Track are tradmearks of Linear Technology Corporation. All other trademarks
are the property of their respective owners. Protected by U.S. Patents, including 6522118.
14-Lead 4mm × 3mm × 0.75mm DFN surface mount
package.
Typical Application
High Efficiency Battery Charger/USB Power Manager
WALL
USB
10µF
3.3µH
VBUS
D0
D1
D2
SW VOUT
VOUTS
LTC4088-1/LTC4088-2 GATE
CHRG
BAT
CLPROG PROG C/X GND NTC
8.2Ω
0.1µF
2.94k
499Ω
+
Li-Ion
SYSTEM
LOAD
10µF
408812 TA01a
Switching Regulator Efficiency to
System Load (POUT/PBUS)
100
90
80
70 BAT = 4.2V
60
BAT = 3.3V
50
40
30
20
10
0
0.01
VBUS = 5V
IBAT = 0mA
10x MODE
0.1
IOUT (A)
1
408812 TA01b
40881fc
1


Linear Technology Electronic Components Datasheet

LTC4088EDE-1 Datasheet

High Efficiency Battery Charger/USB Power Manager

No Preview Available !

LTC4088-1/LTC4088-2
Absolute Maximum Ratings
(Note 1)
VBUS (Transient) t < 1ms, Duty Cycle < 1%... –0.3V to 7V
VBUS (Static), BAT, CHRG, NTC, D0,
D1, D2........................................................... –0.3V to 6V
ICLPROG.....................................................................3mA
IPROG, IC/X.................................................................2mA
ICHRG.......................................................................75mA
IOUT..............................................................................2A
ISW...............................................................................2A
IBAT..............................................................................2A
Maximum Operating Junction Temperature........... 125°C
Operating Temperature Range..................–40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
NTC 1
CLPROG 2
VOUTS 3
D2 4
C/X 5
PROG 6
CHRG 7
14 D1
13 D0
12 SW
15
11 VBUS
10 VOUT
9 BAT
8 GATE
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING PACKAGE DESCRIPTION
LTC4088EDE-1#PBF
LTC4088EDE-1#TRPBF 40881
14-Lead (4mm x 3mm x 0.75mm) Plastic DFN
LTC4088EDE-2#PBF
LTC4088EDE-2#TRPBF 40882
14-Lead (4mm x 3mm x 0.75mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part markings, 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
–40°C to 85°C
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, RCLPROG = 2.94k, unless otherwise noted.
SYMBOL
PARAMETER
Input Power Supply
VBUS
IBUS(LIM)
Input Supply Voltage
Total Input Current
IBUSQ (Note 4) Input Quiescent Current
hCLPROG (Note 4) Ratio of Measured VBUS Current to
CLPROG Program Current
CONDITIONS
1x Mode
5x Mode
10x Mode
Low Power Suspend Mode
High Power Suspend Mode
1x Mode
5x Mode
10x Mode
Low Power Suspend Mode
High Power Suspend Mode
1x Mode
5x Mode
10x Mode
Low Power Suspend Mode
High Power Suspend Mode
MIN
l 4.35
l 92
l 445
l 815
l 0.32
l 1.6
TYP
97
470
877
0.39
2.05
6
14
14
0.038
0.038
224
1133
2140
11.3
59.4
MAX UNITS
5.5
V
100
mA
500
mA
1000
mA
0.5
mA
2.5
mA
mA
mA
mA
mA
mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
40881fc
2


Part Number LTC4088EDE-1
Description High Efficiency Battery Charger/USB Power Manager
Maker Linear
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LTC4088EDE-1 Datasheet PDF






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