LTC4089/LTC4089-5
USB Power Manager with
High Voltage Switching Charger
FEATURES
■
■
DESCRIPTIO
■
■
■
■
■
■
■
■
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
with Adaptive Output Control (LTC4089)
Load Dependent Charging from USB Input
Guarantees Current Compliance
215m 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 4.2V 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
The LTC
®
4089/LTC4089-5 are USB power managers plus
high voltage Li-Ion battery chargers. These devices control
the total current used by the USB peripheral for operation
and battery charging. Battery charge current is automati-
cally reduced such that the sum of the load current and
the charge current does not exceed the programmed input
current limit. The LTC4089/LTC4089-5 also accommodate
high voltage power supplies, such as 12V AC-DC wall
adapters, FireWire, or automotive power.
The LTC4089 provides an adaptive output that tracks the
battery voltage for high efficiency charging from the high
voltage input. The LTC4089-5 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.
Burst Mode is a registered trademark of Linear Technology Corporation.
Protected by U.S. Patents including 6522118 and 6700364.
APPLICATIO S
■
Portable USB Devices—GPS Receivers, Cameras,
MP3 Players, PDAs
TYPICAL APPLICATIO
HIGH (6V-36V)
VOLTAGE INPUT
HVIN
1µF
HVEN
BOOST
0.1µF
SW
10µH
90
10µF
HVOUT
IN
4.7µF
LTC4089
1k
OUT
BAT
TIMER
CLPROG GND PROG
0.1µF
2k
100k
VOUT (TYP)
V
BAT
+0.3V
5V
5V
V
BAT
AVAILABLE INPUT
HV INPUT (LTC4089)
HV INPUT (LTC4089-5)
USB ONLY
BAT ONLY
4.7µF
TO LDOs
R
EGS
, ETC.
HVPR
EFFICIENCY (%)
5V (NOM)
FROM USB
CABLE V
BUS
+
Li-Ion BATTERY
U
LTC4089 High Voltage
Battery Charger Efficiency
CC CURRENT = 970mA
85
NO OUTPUT LOAD
FIGURE 10 SCHEMATIC
80
WITH R
PROG
= 52k
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 TA01b
4089 TAO1
U
U
LTC4089
LTC4089-5
40895fb
1
LTC4089/LTC4089-5
ABSOLUTE
(Notes 1, 2, 3, 4, 5)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
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
LTC4089E................................................. –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 PART NUMBER
LTC4089EDJC
LTC4089EDJC-5
DJC PART MARKING
4089
40895
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
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
)
USB Input Current Limit
IN
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.
CONDITIONS
●
●
●
●
●
MIN
4.35
TYP
MAX
5.5
UNITS
V
mA
µA
mA
mA
A
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
IN
(V
IN
– V
OUT
) V
IN
Rising
(V
IN
– V
OUT
) V
IN
Falling
0.5
50
475
90
500
100
2.4
0.215
1
100
525
110
●
●
0.98
0.98
20
–80
1.00
1.00
5
50
–50
1.02
1.02
80
–20
mA/µs
mV
mV
40895fb
2
U
V
V
W
U
U
W W
W
LTC4089/LTC4089-5
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
(4.2V)
V
BAT
= 2V, R
PROG
= 100k
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
V
IN
Powers Part, Rising Threshold
V
IN
Rising – V
IN
Falling
●
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 (LTC4089)
Assumes HVOUT to OUT Connection (LTC4089-5)
V
HVIN
Rising
V
HVOUT
> 3.95V
V
HVOUT
= 0V
●
●
36
1.9
0.01
2.5
2
4.6
5.15
5
815
V
mA
µA
V
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
3.45
4.85
V
BAT
+0.3
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
4.165
4.158
465
900
0.98
0.98
0.085
35
2.75
4.200
4.200
500
1000
1.2
1.00
1.00
0.1
50
2.9
55
80
●
27
35
100
4.235
4.242
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
40895fb
3
LTC4089/LTC4089-5
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
●
ELECTRICAL CHARACTERISTICS
MIN
TYP
125
215
MAX
UNITS
Internal Ideal Diode
m
m
50
mV
mV
mV
V
mA
A
mV
0.4
0.3
2
6
0.01
●
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
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
●
0.1
2.3
V
V
V
µA
µA
µA
V
µA
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
●
●
1.4
4.4
2.5
4.85
0
0.74•V
VNTC
0.02•V
VNTC
0.29•V
VNTC
0.01•V
VNTC
3.5
mA
V
µA
V
V
V
V
±1
●
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/LTC4089-5 are guaranteed to meet specified
performance from 0°C to 85°C and are designed, characterized and
expected to meet these extended temperature limits, but are 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.
40895fb
4
LTC4089/LTC4089-5
TYPICAL PERFORMANCE CHARACTERISTICS
V
FLOAT
Load Regulation
4.30
4.25
4.20
V
FLOAT
(V)
V
FLOAT
(V)
4.15
4.10
4.190
4.05
4.00
0
200
400
600
I
BAT
(mA)
800
1000
40895 G01
T
A
= 25°C, unless otherwise specified.
Battery Current and Voltage vs
Time (LTC4089)
5
1500
Battery Regulation (Float)
Voltage vs Temperature
4.220
4.215
4.210
4.205
4.200
4.195
V
IN
= 5V
I
BAT
= 2mA
V
BAT
, V
OUT
, V
CHRGB
(V)
R
PROG
= 34k
4
3
V
BAT
V
OUT
V
CHRGB
I
BAT
1200
900
I
BAT
(mA)
2
1250mAh
CELL
HVIN = 12V
R
PROG
= 50k
0
50
100
TIME (MIN)
C/10
600
1
4.185
4.180
–50
–25
50
25
TEMPERATURE (°C)
0
75
100
40895 G02
TERMINATION
300
0
150
0
200
40895 G03
Charging from USB, I
BAT
vs V
BAT
600
V
IN
= 5V
V
OUT
= NO LOAD
500
R
PROG
= 100k
R
CLPROG
= 2k
600
HPWR = 5V
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
40895 G06
400
I
BAT
(mA)
300
200
100
0
0
0.5
1
1.5
2 2.5
V
BAT
(V)
3
3.5
4
4.5
HPWR = 0V
300
200
100
V
IN
= 5V
V
BAT
= 3.5V
θ
JA
= 50°C/W
0
50
25
75
–50 –25
0
TEMPERATURE (°C)
100
125
0
40895 G04
40895 G05
Ideal Diode Current vs Forward
Voltage and Temperature with
External Device
5000
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
4085 G17
LTC4089 High Voltage Regulator
Efficiency vs Output Load
100
95
HVIN = 12V
90
EFFICIENCY (%)
85
80
75
70
65
60
55
50
0
0.2
FIGURE 10 SCHEMATIC
V
BAT
= 4.21V (I
BAT
= 0)
0.6
0.4
I
OUT
(A)
0.8
1.0
40895 G08
LTC4089-5 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
= 4.21V (I
BAT
= 0)
0.6
0.4
I
OUT
(A)
0.8
1.0
40895 G09
HVIN = 8V
HVIN = 8V
HVIN = 24V
HVIN = 36V
HVIN = 24V
HVIN = 36V
40895fb
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