FEATURES
■
■
■
LTC4090/LTC4090-5
USB Power Manager with
2A High Voltage Bat-Track
Buck Regulator
DESCRIPTION
The LTC
®
4090/LTC4090-5 are USB power managers plus
high voltage Li-Ion/Polymer battery chargers. The devices
control 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 LTC4090/LTC4090-5 also accom-
modate high voltage power supplies, such as 12V AC/DC
wall adapters, FireWire, or automotive power.
The LTC4090 provides a Bat-Track adaptive output that
tracks the battery voltage for high efficiency charging from
the high voltage input. The LTC4090-5 provides a fixed 5V
output from the high voltage input to charge single cell
Li-Ion bateries. The charge current is programmable and an
end-of-charge status output (
⎯
C
⎯
H
⎯
R
⎯
G) 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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Bat-Track is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
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Seamless Transition Between Power Sources: Li-
Ion Battery, USB, and 6V to 36V Supply (60V Max)
2A Output High Voltage Buck Regulator with Bat-
Track
TM
Adaptive Output Control (LTC4090)
Internal 215mΩ Ideal Diode Plus Optional External
Ideal Diode Controller Provides Low Loss Power
Path When External Supply / USB Not Present
Load Dependent Charging from USB Input Guaran-
tees Current Compliance
Full Featured Li-Ion Battery Charger
1.5A Maximum Charge Current with Thermal Limiting
NTC Thermistor Input for Temperature Qualified
Charging
Tiny (3mm
×
6mm
×
0.75mm) 22-Pin DFN Package
APPLICATIONS
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■
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HDD-Based Media Players
Personal Navigation Devices
Other USB-Based Handheld Products
Automotive Accessories
TYPICAL APPLICATION
0.47μF
HIGH (6V-36V)
VOLTAGE INPUT
5V WALL
ADAPTER
IN
USB
4.7μF
V
C
TIMER
RT
0.1μF
40.2k
CLPROG
2k
GND
LTC4090
OUT
4.7μF
BAT
PROG
100k
HVIN
1μF
HVOUT
HVPR
1k
BOOST
SW
22μF
6.8μH
LTC4090/LTC4090-5 High Voltage
Battery Charger Efficiency
90
FIGURE 12 SCHEMATIC
WITH R
PROG
= 52k
80
NO OUTPUT LOAD
LTC4090
EFFICIENCY (%)
LOAD
70
LTC4090-5
60
50
40
30
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
2.5
3.5
3.0
V
BAT
(V)
4.0
4.5
4090 TA01b
59k
270pF
+
Li-Ion BATTERY
V
OUT
(TYP)
V
BAT
+ 0.3V
5V
5V
V
BAT
AVAILABLE INPUT
HV INPUT (LTC4090)
HV INPUT (LTC4090-5)
USB ONLY
BAT ONLY
20
2.0
4090 TAO1
4090fa
1
LTC4090/LTC4090-5
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3, 4)
PIN CONFIGURATION
TOP VIEW
SYNC
PG
R
T
V
C
NTC
VNTC
HVPR
CHRG
PROG
1
2
3
4
5
6
7
8
9
23
22 HVEN
21 HVIN
20 SW
19 BOOST
18 HVOUT
17 TIMER
16 SUSP
15 HPWR
14 CLPROG
13 OUT
12 IN
HVIN, HVEN (Note 9) ................................................60V
BOOST ......................................................................56V
BOOST above SW .....................................................30V
PG, SYNC ..................................................................30V
IN, OUT, HVOUT
t < 1ms and Duty Cycle < 1% .................. –0.3V to 7V
Steady State............................................. –0.3V to 6V
BAT, HPWR, SUSP, V
C
,
⎯
C
⎯
H
⎯
R
⎯
G,
⎯
H
⎯
V
⎯
P
⎯
R ........... –0.3V to 6V
NTC, TIMER, PROG, CLPROG ..........–0.3V to V
CC
+ 0.3V
I
IN
, I
OUT
, I
BAT
(Note 5) ..............................................2.5A
Operating Temperature Range ..................... –40 to 85°C
Junction Temperature ........................................... 110°C
Storage Temperature Range....................... –65 to 125°C
GATE 10
BAT 11
DJC PACKAGE
22-LEAD (6mm
×
3mm) PLASTIC DFN
T
JMAX
= 110°C,
θ
JA
= 47°C/W
EXPOSED PAD (PIN 23) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC4090EDJC#PBF
LTC4090EDJC-5#PBF
TAPE AND REEL
LTC4090EDJC#TRPBF
LTC4090EDJC-5#TRPBF
PART MARKING
4090
40905
PACKAGE DESCRIPTION
22-Lead (6mm
×
3mm) Plastic DFN
22-Lead (6mm
×
3mm) Plastic DFN
TEMPERATURE RANGE
–40°C to 85°C
–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/
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
I
IN
I
LIM
I
IN(MAX)
R
ON
V
CLPROG
I
SS
PARAMETER
USB Input Supply Voltage
Input Bias Current
Current Limit
Maximum Input Current Limit
On-Resistance V
IN
to V
OUT
CLPROG Servo Voltage in Current Limit
Soft-Start Inrush Current
USB Input Current Limit
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = HVEN = 12V, BOOST = 17V, V
IN
= HPWR = 5V, V
BAT
= 3.7V,
R
PROG
= 100k, R
CLPROG
= 2k and SUSP = 0V, unless otherwise noted.
CONDITIONS
●
MIN
4.35
TYP
MAX
5.5
UNITS
V
mA
μA
mA
mA
A
Ω
I
BAT
= 0 (Note 6)
Suspend Mode; SUSP = 5V
HPWR = 5V
HPWR = 0V
(Note 7)
I
OUT
= 80mA
R
CLPROG
= 2k
R
CLPROG
= 1k
●
●
●
●
0.5
50
475
90
500
100
2.4
0.215
1
100
525
110
●
●
0.98
0.98
1.00
1.00
10
1.02
1.02
V
V
mA/μs
4090fa
2
LTC4090/LTC4090-5
ELECTRICAL CHARACTERISTICS
SYMBOL
V
CLEN
V
UVLO
ΔV
UVLO
V
HVIN
V
OVLO
I
HVIN
V
OUT
V
OUT
f
SW
PARAMETER
Input Current Limit Enable Threshold
Voltage (V
IN
- V
OUT
)
Input Undervoltage Lockout
Input Undervoltage Lockout Hysteresis
HVIN Supply Voltage
HVIN Overvoltage Lockout Threshold
HVIN Bias Current
Output Voltage with HVIN Present
Output Voltage with HVIN Present
Switching Frequency
Shutdown; HVEN = 0.2V
Not Switching, HVOUT = 3.6V
Assumes HVOUT to OUT Connection,
0 ≤ V
BAT
≤ 4.2V (LTC4090)
Assumes HVOUT to OUT Connection
(LTC4090-5)
R
T
= 8.66k
R
T
= 29.4k
R
T
= 187k
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = HVEN = 12V, BOOST = 17V, V
IN
= HPWR = 5V, V
BAT
= 3.7V,
R
PROG
= 100k, R
CLPROG
= 2k and SUSP = 0V, unless otherwise noted.
CONDITIONS
(V
IN
- V
OUT
) Rising
(V
IN
- V
OUT
) Falling
V
IN
Rising
V
IN
Rising – V
IN
Falling
●
●
●
●
MIN
20
–80
3.6
TYP
50
–50
3.8
130
MAX
80
–20
4
UNITS
mV
mV
V
mV
High Voltage Regulator
6
36
41.5
0.01
130
3.45
4.85
2.1
0.9
160
3.0
V
BAT
+ 0.3
5
2.4
1.0
200
60
3.5
500
0.02
●
60
45
0.5
200
4.6
5.15
2.7
1.15
240
150
4.0
2
2.1
35
27
35
100
4.235
4.242
535
1080
1.02
1.02
0.11
60
3.0
V
V
μA
μA
V
V
MHz
MHz
kHz
ns
A
mV
μA
V
mA
μA
μA
μA
V
V
mA
mA
A
V
V
mA/mA
mA
V
mV
mV
t
OFF
I
SW(MAX)
V
SAT
I
R
V
B(MIN)
I
BST
I
BAT
Minimum Switch Off-Time
Switch Current Limit
Switch V
CESAT
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 8)
BOOST Pin Current
Battery Drain Current
I
SW
= 1A
V
BAT
= 4.3V, Charging Stopped
Suspend Mode, SUSP = 5V
V
IN
= 0V, BAT Powers OUT, No Load
I
BAT
= 2mA
I
BAT
= 2mA; 0 ≤ T
A
≤ 85°C
Duty Cycle = 5%
I
SW
= 2A
SW = 10V, HVOUT = 0V
1.5
22
Battery Management
●
●
●
15
22
60
4.165
4.158
4.200
4.200
500
1000
1.5
1.00
1.00
0.1
50
2.9
55
80
V
FLOAT
I
CHG
I
CHG(MAX)
V
PROG
k
EOC
I
TRKL
V
TRKL
V
CEN
ΔV
RECHRG
V
BAT
Regulated Output Voltage
Constant-Current Mode Charge Current, R
PROG
= 100k
No Load
R
PROG
= 50k, 0 ≤ T
A
≤ 85°C
Maximum Charge Current
PROG Pin Servo Voltage
Ratio of End-of-Charge Indication
Current to Charge Current
Trickle Charge Current
Trickle Charge Threshold Voltage
Charge Enable Threshold Voltage
Recharge Battery Threshold Voltage
R
PROG
= 100k
R
PROG
= 50k
V
BAT
= V
FLOAT
(4.2V)
BAT = 2V
BAT Rising
(V
OUT
– V
BAT
) Falling; V
BAT
= 4V
(V
OUT
– V
BAT
) Rising; V
BAT
= 4V
Threshold Voltage Relative to V
FLOAT
●
465
900
0.98
0.98
0.085
35
●
●
●
●
2.75
●
–65
–100
–135
mV
4090fa
3
LTC4090/LTC4090-5
ELECTRICAL CHARACTERISTICS
SYMBOL
t
TIMER
PARAMETER
TIMER Accuracy
Recharge Time
Low Battery Trickle Charge Time
T
LIM
Junction Temperature in Constant
Temperature Mode
Incremental Resistance, V
ON
Regulation I
OUT
= 100mA
On-Resistance V
BAT
to V
OUT
Voltage Forward Drop (V
BAT
– V
OUT
)
I
OUT
= 600mA
I
OUT
= 5mA
I
OUT
= 100mA
I
OUT
= 600mA
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = HVEN = 12V, BOOST = 17V, V
IN
= HPWR = 5V, V
BAT
= 3.7V,
R
PROG
= 100k, R
CLPROG
= 2k and SUSP = 0V, unless otherwise noted.
CONDITIONS
V
BAT
= 4.3V
Percent of Total Charge Time
Percent of Total Charge Time,
V
BAT
<2.9V
MIN
–10
50
25
105
TYP
MAX
10
UNITS
%
%
%
°C
Internal Ideal Diode
R
FWD
R
DIO, ON
V
FWD
125
215
10
30
55
160
2.7
550
2.2
20
●
mΩ
mΩ
50
mV
mV
mV
V
mA
A
mV
0.4
V
μA
0.4
0.4
V
V
V
V
0.3
V
μA
10
μA
V
mV
1
μA
μA
V
0.8
V
μA
V
OFF
I
FWD
I
D(MAX)
V
FWD, EXT
V
CHG, SD
I
CHG, SD
V
OL
V
IH
V
IL
V
HVEN, H
V
HVEN, L
I
PULLDN
I
HVEN
V
PG
ΔV
PG
I
PGLK
I
PG
V
SYNC, L
V
SYNC, H
I
SYNC
Diode Disable Battery Voltage
Load Current Limit for V
ON
Regulation
Diode Current Limit
External Diode Forward Voltage
Charger Shutdown Threshold Voltage
on TIMER
Charger Shutdown Pull-Up Current on
TIMER
Output Low Voltage
Input High Voltage
Input Low Voltage
HVEN High Threshold
HVEN Low Threshold
Logic Input Pull-Down Current
HVEN Pin Bias Current
PG Threshold
PG Hysteresis
PG Leakage
PG Sink Current
SYNC Low Threshold
SYNC High Threshold
SYNC Pin Bias Current
V
SYNC
= 0V
PG = 5V
PG = 0.4V
●
External Ideal Diode
Logic (
⎯
C
⎯
H
⎯
R
⎯
G,
⎯
H
⎯
V
⎯
P
⎯
R, TIMER, SUSP, HPWR, HVEN, PG, SYNC)
0.14
5
14
0.1
1.2
2.3
SUSP, HPWR
HVEN = 2.5V
HVOUT Rising
2
5
2.8
35
0.1
100
0.5
0.1
900
V
TIMER
= 0V
⎯
(C
⎯
H
⎯
R
⎯
G,
⎯
H
⎯
V
⎯
P
⎯
R); I
SINK
= 5mA
SUSP, HPWR
SUSP, HPWR
●
●
4090fa
4
LTC4090/LTC4090-5
ELECTRICAL CHARACTERISTICS
SYMBOL
NTC
I
VNTC
V
VNTC
I
NTC
V
COLD
V
HOT
V
DIS
VNTC Pin Current
VNTC Bias Voltage
NTC Input Leakage Current
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Threshold Voltage
VNTC = 2.5V
I
VNTC
= 500μA
NTC = 1V
Rising NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. HVIN = HVEN = 12V, BOOST = 17V, V
IN
= HPWR = 5V, V
BAT
= 3.7V,
R
PROG
= 100k, R
CLPROG
= 2k and SUSP = 0V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
1.4
4.4
TYP
2.5
4.85
0
0.738 • VNTC
0.02 • VNTC
0.29 • VNTC
0.01 • VNTC
75
100
35
125
±1
MAX
3.5
UNITS
mA
V
μA
V
V
V
V
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:
The LTC4090/LTC4090-5 are guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may result in device degradation or failure.
Note 4:
V
CC
is the greater of V
IN
, V
OUT
, and V
BAT
Note 5:
Guaranteed by long term current density limitations.
Note 6:
Total input current is equal to this specification plus 1.002 • I
BAT
where I
BAT
is the charge current.
Note 7:
Accuracy of programmed current may degrade for currents
greater than 1.5A.
Note 8:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 9:
Absolute Maximum Voltage at HVIN and HVEN pins is for non-
repetative 1 second transients; 40V for continuous operation.
TYPICAL PERFORMANCE CHARACTERISTICS
V
FLOAT
Load Regulation
4.30
4.25
4.20
V
FLOAT
(V)
V
FLOAT
(V)
4.15
4.10
4.05
4.00
0
200
400
600
I
BAT
(mA)
800
1000
4090 G01
Battery Regulation (Float)
Voltage vs Temperature
4.220
4.215
4.210
4.205
4.200
4.195
4.190
4.185
4.180
–50
–25
50
25
TEMPERATURE (°C)
0
75
100
4090 G02
Battery Current and Voltage vs
Time (LTC4090)
5
1500
R
PROG
= 34k
V
IN
= 5V
I
BAT
= 2mA
V
BAT
, V
OUT
, V
CHRGB
(V)
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
TERMINATION
300
0
150
0
200
4090 G03
4090fa
5
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