LTC4089-1
USB Power Manager with
High Voltage Switching Charger
FEATURES
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DESCRIPTION
The LTC
®
4089-1 is a USB power manager plus high
voltage Li-Ion battery charger. This device controls the
total current 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 current does not exceed the programmed input
current limit. The LTC4089-1 also accommodates high
voltage power supplies, such as 12V AC-DC wall adapters,
Firewire, or automotive power.
The LTC4089-1 provides a fixed 5V output from the high
voltage input to charge single cell Li-Ion batteries. The
charge current is programmable and an end-of-charge
status output (CHRG) indicates full charge. Also featured
is programmable total charge time, an NTC thermistor
input used to monitor battery temperature while charging
and automatic recharging of the battery.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6522118 and 6700364.
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Seamless Transition Between Power Sources: Li-Ion
Battery, USB, and 6V to 36V External Supply
High Efficiency 1.2A Charger from 6V to 36V Input
Load Dependent Charging from USB Input
Guarantees Current Compliance
215mΩ Internal Ideal Diode plus Optional External
Ideal Diode Controller Provides Low Loss Power
Path When External Supply/USB Not Present
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
without Risk of Overheating
Selectable 100% or 20% Current Limit (e.g., 500mA/
100mA) from USB Input
Preset 4.1V Charge Voltage with 0.8% Accuracy
C/10 Charge Current Detection Output
NTC Thermistor Input for Temperature Qualified
Charging
Tiny (6mm
×
3mm
×
0.75mm) 22-Pin DFN Package
APPLICATIONS
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Portable USB Devices—GPS Receivers, Cameras,
MP3 Players, PDAs
TYPICAL APPLICATION
0.1μF
HIGH (6V-36V)
VOLTAGE INPUT
HVIN
1μF
HVEN
HVOUT
LTC4089-1
OUT
BAT
TIMER
CLPROG GND PROG
0.1μF
2k
100k
V
OUT
(TYP)
5V
5V
V
BAT
AVAILABLE INPUT
HV INPUT (LTC4089-1)
USB ONLY
BAT ONLY
4089-1 TAO1
10μH
90
10μF
LTC4089-1 High Voltage
Battery Charger Efficiency
CC CURRENT = 970mA
85 NO OUTPUT LOAD
FIGURE 10 SCHEMATIC
80 WITH R
PROG
= 52k
EFFICIENCY (%)
75
70
65
60
55
50
45
40
2.5
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
3.5
3
4
BATTERY VOLTAGE (V)
4.5
4089-1 TA01b
BOOST
SW
5V (NOM)
FROM USB
CABLE V
BUS
IN
4.7μF
HVPR
1k
4.7μF
TO LDOs
R
EGS
, ETC.
LTC4089-1
+
Li-Ion BATTERY
40891fa
1
LTC4089-1
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3, 4, 5)
PIN CONFIGURATION
TOP VIEW
GND
GND
HVOUT
V
C
NTC
VNTC
HVPR
CHRG
PROG
1
2
3
4
5
6
7
8
9
23
22 HVEN
21 HVIN
20 BOOST
19 SW
18 HVOUT
17 TIMER
16 SUSP
15 HPWR
14 CLPROG
13 OUT
12 IN
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 (V
CC
+ 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 125°C
GATE 10
BAT 11
DJC PACKAGE
22-LEAD (6mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 23) IS GND
(MUST BE SOLDERED TO PCB)
T
JMAX
= 110°C,
JA
= 40°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC4089EDJC-1#PBF
TAPE AND REEL
LTC4089EDJC-1#TRPBF
PART MARKING
40891
PACKAGE DESCRIPTION
22-Lead (6mm
×
3mm) Plastic DFN
TEMPERATURE RANGE
– 40°C to 85°C
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/
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = 12V, BOOST = 17V, V
IN
= 5V, V
BAT
= 3.7V, HVEN = 12V,
HPWR = 5V, R
PROG
= 100k, R
CLPROG
= 2k, SUSP = 0V, unless otherwise noted.
SYMBOL
V
IN
I
IN
I
LIM
I
IN(MAX)
R
ON
V
CLPROG
I
SS
V
CLEN
PARAMETER
USB Input Supply Voltage
Input Bias Current
Current Limit
Maximum Input Current Limit
ON Resistance V
IN
to V
OUT
CLPROG Pin Voltage
Soft-Start Inrush Current
Input Current Limit Enable
Threshold Voltage (V
IN
– V
OUT
)
(V
IN
– V
OUT
) Rising
(V
IN
– V
OUT
) Falling
20
–80
I
BAT
= 0 (Note 7)
Suspend Mode; SUSP = 5V
R
CLPROG
= 2k, HPWR = 5V
R
CLPROG
= 2k, HPWR = 0V
(Note 8)
I
OUT
= 80mA Load
R
CLPROG
= 2k
R
CLPROG
= 1k
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ELECTRICAL CHARACTERISTICS
CONDITIONS
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MIN
4.35
TYP
MAX
5.5
UNITS
V
mA
μA
mA
mA
A
USB Input Current Limit
0.5
50
475
90
500
100
2.4
0.215
0.98
0.98
1.00
1.00
5
50
–50
80
–20
1.02
1.02
V
V
mA/μs
mV
mV
40891fa
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100
525
110
2
LTC4089-1
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = 12V, BOOST = 17V, V
IN
= 5V, V
BAT
= 3.7V, HVEN = 12V,
HPWR = 5V, R
PROG
= 100k, R
CLPROG
= 2k, SUSP = 0V, unless otherwise noted.
SYMBOL
V
UVLO
dV
UVLO
PARAMETER
Input Undervoltage Lockout
Input Undervoltage Lockout
Hysteresis
HVIN Supply Voltage
HVIN Bias Current
Output Voltage with HVIN Present
High Voltage Input Undervoltage
Lockout
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
Minimum Boost Voltage Above SW
BOOST Pin Current
Input Voltage
Battery Drain Current
I
SW
= 1A
I
SW
= 1A
BAT
V
BAT
= 4.3V, Charging Stopped
Suspend Mode; SUSP = 5V
V
HVIN
= V
IN
= 0V, BAT Powers OUT, No Load
I
BAT
= 2mA
I
BAT
= 2mA; (0°C – 85°C)
R
PROG
= 100k, No Load
R
PROG
= 50k, No Load; (0°C – 85°C)
(Note 8)
R
PROG
= 100k
R
PROG
= 50k
V
BAT
= V
FLOAT
(4.1V)
V
BAT
= 2V, R
PROG
= 100k
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ELECTRICAL CHARACTERISTICS
CONDITIONS
V
IN
Powers Part, Rising Threshold
V
IN
Rising – V
IN
Falling
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MIN
3.6
TYP
3.8
130
MAX
4
UNITS
V
mV
High Voltage Regulator
V
HVIN
I
HVIN
V
OUT
V
HVUVLO
f
SW
DC
MAX
I
SW(MAX)
V
SAT
I
LK
V
SWD
I
BST
V
BAT
I
BAT
6
Not Switching
Shutdown; HVEN = 0V
Assumes HVOUT to OUT Connection
V
HVIN
Rising
V
HVOUT
> 3.95V
V
HVOUT
= 0V
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1.9
0.01
2.5
2
5.15
5
815
V
mA
μA
V
V
kHz
kHz
%
A
mV
μA
V
mA
V
μA
μA
μA
V
V
mA
mA
A
V
V
mA/mA
mA
V
mV
mV
4.85
5
4.7
685
88
1.5
750
35
95
1.95
330
(Note 9)
I
SW
= 1A
2.3
2
1.85
30
2.2
50
4.3
Battery Management
15
22
60
4.066
4.059
465
900
0.98
0.98
0.085
35
2.75
4.100
4.100
500
1000
1.2
1.00
1.00
0.1
50
2.9
55
80
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35
100
4.134
4.141
535
1080
1.02
1.02
0.11
60
3
V
FLOAT
I
CHG
I
CHG(MAX)
V
PROG
k
EOC
I
TRIKL
V
TRIKL
V
CEN
V
RECHRG
t
TIMER
Regulated Output Voltage
Current Mode Charge Current
Maximum Charge Current
PROG Pin Voltage
Ratio of End-of-Charge Current to
Charge Current
Trickle Charge Current
Trickle Charge Threshold Voltage
Charger Enable Threshold Voltage
(V
OUT
– V
BAT
) Falling; V
BAT
= 4V
(V
OUT
– V
BAT
) Rising; V
BAT
= 4V
65
–10
V
BAT
= 4.3V
Percent of Total Charge Time
Percent of Total Charge Time, V
BAT
< 2.8V
Recharge Battery Threshold Voltage V
FLOAT
- V
RECHRG
TIMER Accuracy
Recharge Time
Low Battery Trickle Charge Time
100
50
25
105
135
10
mV
%
%
%
°C
T
LIM
Junction Temperature in Constant
Temperature Mode
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LTC4089-1
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = 12V, BOOST = 17V, V
IN
= 5V, V
BAT
= 3.7V, HVEN = 12V,
HPWR = 5V, R
PROG
= 100k, R
CLPROG
= 2k, SUSP = 0V, unless otherwise noted.
SYMBOL
R
FWD
R
DIO,ON
V
FWD
PARAMETER
Incremental Resistance, V
ON
Regulation
ON Resistance V
BAT
to V
OUT
CONDITIONS
I
BAT
= 100mA
I
BAT
= 600mA
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ELECTRICAL CHARACTERISTICS
Internal Ideal Diode
MIN
TYP
125
215
MAX
UNITS
mΩ
mΩ
Voltage Forward Drop (V
BAT
- V
OUT
) I
BAT
= 5mA
I
BAT
= 100mA
I
BAT
= 600mA
Diode Disable Battery Voltage
Load Current Limit, for V
ON
Regulation
Diode Current Limit
External Diode Forward Voltage
Output Low Voltage (CHRG,
HVPR)
Input High Voltage
Input Low Voltage
Logic Input Pull Down Current
HVEN Pin Bias Current
Charger Shutdown Threshold
Voltage on TIMER
Charger Shutdown Pull-Up Current
on TIMER
VNTC Pin Current
VNTC Bias Voltage
NTC Input Leakage Current
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Voltage
V
TIMER
= 0V
I
SINK
= 5mA
HVEN, SUSP, HPWR Pin Low to High
HVEN, SUSP, HPWR Pin High to Low
SUSP, HPWR
V
HVEN
= 2.3V
V
HVEN
= 0V
10
30
55
160
2.8
550
2.2
20
50
mV
mV
mV
V
mA
A
mV
V
OFF
I
FWD
I
D(MAX)
V
FWD, EXT
Logic
V
OL
V
IH
V
IL
I
PULLDN
I
HVEN
V
CHG,SD
I
CHG,SD
NTC
I
VNTC
V
VNTC
I
NTC
V
COLD
V
HOT
V
DIS
External Ideal Diode
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0.1
2.3
0.4
0.3
V
V
V
μA
μA
μA
V
μA
2
6
0.01
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20
0.1
0.4
0.14
5
14
V
VNTC
= 2.5V
I
VNTC
= 500μA
V
NTC
= 1V
Rising Threshold
Hysteresis
Falling Threshold
Hysteresis
NTC Input Voltage to GND (Falling)
Hysteresis
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1.4
4.4
2.5
4.85
0
0.738 • V
VNTC
0.018 • V
VNTC
0.326 • V
VNTC
0.015 • V
VNTC
3.5
±1
mA
V
μA
V
V
V
V
l
75
100
35
125
mV
mV
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
V
CC
is the greater of V
IN
, V
OUT
or V
BAT
Note 3:
All voltage values are with respect to GND.
Note 4:
This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when over-temperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may result in device degradation or failure.
Note 5:
The LTC4089-1 is guaranteed to meet specified performance from
0°C to 85°C and are designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40°C and 85°C.
Note 6:
Guaranteed by long term current density limitations.
Note 7:
Total input current is equal to this specification plus 1.002 • I
BAT
where I
BAT
is the charge current.
Note 8:
Accuracy of programmed current may degrade for currents greater
than 1.5A.
Note 9:
Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at high duty cycle.
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LTC4089-1
TYPICAL PERFORMANCE CHARACTERISTICS
V
FLOAT
Load Regulation
4.20
4.15
4.10
V
FLOAT
(V)
V
FLOAT
(V)
4.05
4.00
4.090
3.95
3.90
0
200
400
600
I
BAT
(mA)
800
1000
4089-1 G01
T
A
= 25°C, unless otherwise specified.
Battery Current and Voltage
vs Time
5
1500
Battery Regulation (Float)
Voltage vs Temperature
4.120
4.115
4.110
4.105
4.100
4.095
V
IN
= 5V
I
BAT
= 2mA
V
BAT
, V
OUT
, V
CHRG
(V)
R
PROG
= 34k
4
3
V
BAT
V
OUT
V
CHRG
I
BAT
1200
900
I
BAT
(mA)
2
1250mAh
CELL
HVIN = 12V
R
PROG
= 50k
0
50
100
TIME (MIN)
C/10
TERMINATION
600
1
4.085
4.080
–50
–25
50
25
TEMPERATURE (°C)
0
75
100
0
300
150
0
200
4089-1 G03
4089-1 G02
Charging from USB, I
BAT
vs V
BAT
600
V
IN
= 5V
V
OUT
= NO LOAD
500 R
PROG
= 100k
R
CLPROG
= 2k
600
500
400
I
BAT
(mA)
Charge Current vs Temperature
(Thermal Regulation)
1000
Ideal Diode Current vs Forward
Voltage and Temperature
(No External Device)
V
BAT
= 3.7V
900 V
IN
= 0V
800
700
I
OUT
(mA)
600
500
400
300
200
100
–50°C
0°C
50°C
100°C
0
50
100
V
FWD
(mV)
150
200
4089-1 G06
400
I
BAT
(mA)
300
200
HPWR = 5V
HPWR = 0V
100
0
0
0.5
1
1.5
2 2.5
V
BAT
(V)
3
300
200
100 V
IN
= 5V
V
BAT
= 3.5V
JA
= 50°C/W
0
50
–50 –25
25
75
0
TEMPERATURE (°C)
3.5
4
4.5
100
125
0
4089-1 G04
4089-1 G05
Ideal Diode Current vs Forward
Voltage and Temperature with
External Device
V
BAT
= 3.7V
4500 V
IN
= 0V
Si2333 PFET
4000
EFFICIENCY (%)
3500
I
OUT
(mA)
3000
2500
2000
1500
1000
500
0
0
20
60
40
V
FWD
(mV)
80
–50°C
0°C
50°C
100°C
100
4089-1 G17
High Voltage Regulator Efficiency
vs Output Load
100
95 HVIN = 12V
90
85
80
75
70
65
60
55
50
0
0.2
FIGURE 10 SCHEMATIC
V
BAT
= 4.11V (I
BAT
= 0)
0.6
0.4
I
OUT
(A)
0.8
1.0
4089-1 G09
5000
HVIN = 8V
HVIN = 24V
HVIN = 36V
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