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Linear Technology Electronic Components Datasheet

LTC4089-3 Datasheet

USB Power Manager

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LTC4089-3
USB Power Manager with
High Voltage Switching Charger
FEATURES
DESCRIPTION
n Seamless Transition Between Power Sources: Li-Ion
Battery, USB, and 6V to 36V External Supply
n High Efficiency 1.2A Charger from 6V to 36V Input
with Adaptive Output Control
n 3.95V Float Voltage Improves Battery Lifespan and
High Temperature Safety Margin
n Load Dependent Charging from USB Input
Guarantees Current Compliance
n 215m Internal Ideal Diode plus Optional External
Ideal Diode Controller Provides Low Loss Power
Path When External Supply/USB Not Present
n Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
without Risk of Overheating
n Selectable 100% or 20% Current Limit (e.g., 500mA/
100mA) from USB Input
n Preset 3.95V Charge Voltage with ±0.8% Accuracy
n C/10 Charge Current Detection Output
n NTC Thermistor Input for Temperature Qualified
Charging
n Tiny (6mm × 3mm × 0.75mm) 22-Lead DFN Package
APPLICATIONS
n Portable USB Devices—GPS Receivers, Cameras,
MP3 Players, PDAs
The LTC®4089-3 is a USB power manager plus high voltage
Li-Ion battery charger. This device controls the total cur-
rent used by the USB peripheral for operation and battery
charging. Battery charge current is automatically reduced
such that the sum of the load current and the charge cur-
rent does not exceed the programmed input current limit.
The LTC4089-3 also accommodates high voltage power
supplies, such as 12V AC/DC wall adapters, Firewire, or
automotive power.
The LTC4089-3 provides an adaptive output that tracks
the battery voltage for high efficiency charging from the
high voltage input. This 3.95V version of the the standard
LTC4089 is intended for applications which have extended
battery lifetime requirements or those that require high
temperature (approximately >60°C) operation or stor-
age. Under these conditions, a reduced float voltage will
trade-off initial cell capacity for the benefit of increased
capacity retention over the life of the battery. The charge
current is programmable and an end-of-charge status
output (CHRG) indicates full charge. Also featured are
programmable total charge time, an NTC thermistor input
used to monitor battery temperature while charging and
automatic recharging of the battery.
L, LT, LTC and LTM are registered trademarks and Bat-Track, PowerPath 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, 6700364, 7733061.
TYPICAL APPLICATION
HIGH (6V-36V)
VOLTAGE INPUT
5V (NOM)
FROM USB
CABLE VBUS
1µF
4.7µF
0.1µF
HVIN
HVEN
BOOST
0.1µF
SW
HVOUT
IN HVPR
LTC4089-3
OUT
TIMER
BAT
CLPROG GND PROG
2k 100k
10µH
10µF
1k
+
Li-Ion BATTERY
VOUT (TYP)
VBAT + 0.3V
5V
VBAT
TO LDOs
4.7µF REGS, ETC.
AVAILABLE INPUT
HV INPUT
USB ONLY
BAT ONLY
40893 TAO1a
For more information www.linear.com/4089-3
LTC4089 High Voltage
Battery Charger Efficiency
90 CC CURRENT = 970mA
85 NO OUTPUT LOAD
80
FIGURE 10 SCHEMATIC
WITH RPROG = 52k
75
70
65
60
55
50
45
40
2.5
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
3 3.5 4
BATTERY VOLTAGE (V)
4.5
40893 TA01b
40893f
1


Linear Technology Electronic Components Datasheet

LTC4089-3 Datasheet

USB Power Manager

No Preview Available !

LTC4089-3
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3, 4, 5)
Terminal Voltage
BOOST ....................................................... –0.3V to 50V
BOOST above SW......................................................25V
HVIN, HVEN ............................................... –0.3V to 40V
IN, OUT, HVOUT
t < 1ms and Duty Cycle < 1%................... –0.3V to 7V
DC............................................................. –0.3V to 6V
BAT............................................................... –0.3V to 6V
NTC, TIMER, PROG, CLPROG........–0.3V to (VCC + 0.3V)
CHRG, HPWR, SUSP, HVPR.......................... –0.3V to 6V
Pin Current, DC
IN, OUT, BAT (Note 6)................................................2.5A
Operating Temperature Range.................. –40°C to 85°C
Maximum Operating Junction Temperature........... 110°C
Storage Temperature Range.................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
GND 1
22 HVEN
GND 2
21 HVIN
HVOUT 3
20 BOOST
VC 4
NTC 5
19 SW
18 HVOUT
VNTC 6
23 17 TIMER
HVPR 7
16 SUSP
CHRG 8
15 HPWR
PROG 9
14 CLPROG
GATE 10
13 OUT
BAT 11
12 IN
DJC PACKAGE
22-LEAD (6mm × 3mm) PLASTIC DFN
TJMAX = 110°C, θJA = 4°C/W
EXPOSED PAD (PIN 23) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC4089EDJC-3#PBF
LTC4089EDJC-3#TRPBF 40893
22-Lead (6mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
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
LTC4089 OPTIONS
PART NUMBER
LTC4089
LTC4089-1
LTC4089-3
LTC4089-5
FLOAT VOLTAGE
4.2V
4.1V
3.95V
4.2V
NTC HOT THRESHOLD
29% VVNTC
32.6% VVNTC
32.6% VVNTC
29% VVNTC
Bat-Track™ ADAPTIVE HV OUTPUT
Yes
No
Yes
No
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
tHePmWpRer=at5uVr,eRraPnROgGe,=o1th0e0rkw, iRsCeLsPpReOcGi=fic2akt,ioSnUsSaPre=a0tVT,Aun=l2e5ss°Co.thHeVrIwNis=e1n2oVt,eBdO. OST = 17V, VIN = 5V, VBAT = 3.7V, HVEN = 12V,
SYMBOL
PARAMETER
USB Input Current Limit
VIN USB Input Supply Voltage
IIN Input Bias Current
CONDITIONS
IN
IBAT = 0 (Note 7)
Suspend Mode; SUSP = 5V
MIN TYP MAX
l 4.35
5.5
l 0.5 1
l 50 100
UNITS
V
mA
µA
40893f
2 For more information www.linear.com/4089-3


Part Number LTC4089-3
Description USB Power Manager
Maker Linear
Total Page 24 Pages
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