FEATURES
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LTC4075HVX
High Voltage Dual Input
Li-Ion/Polymer Battery
Charger
DESCRIPTION
The LTC
®
4075HVX is a standalone linear charger that is
capable of charging a single-cell Li-Ion/Polymer battery
from both wall adapter and USB inputs. The charger can
detect power at the inputs and automatically select the
appropriate power source for charging.
No external sense resistor or blocking diode is required
for charging due to the internal MOSFET architecture. The
LTC4075HVX features a maximum 22V rating for both
wall adapter and USB inputs although charging stops if
the selected power source exceeds the overvoltage limit.
Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The float voltage is fixed at 4.2V and the charge current is
programmed with an external resistor. The LTC4075HVX
terminates the charge cycle when the charge current drops
below the programmed termination threshold after the
final float voltage is reached.
Other features include automatic recharge, undervoltage
lockout, charge status outputs, and “power present” status
outputs to indicate the presence of wall adapter or USB
power. No trickle charge allows full current from the charger
when a load is connected directly to 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, 6700364.
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22V Maximum Voltage for Wall Adapter and
USB Inputs
Charge Single-Cell Li-Ion Batteries from Wall
Adapter and USB Inputs
Automatic Input Power Detection and Selection
Charge Current Programmable up to 950mA from
Wall Adapter Input
Overvoltage Lockout for Wall Adapter and
USB Inputs
No External MOSFET, Sense Resistor or Blocking
Diode Needed
Thermal Regulation Maximizes Charge Rate Without
Risk of Overheating*
Preset Charge Voltage with ±0.35% Accuracy
Programmable Charge Current Termination
40μA USB Suspend Current in Shutdown
Independent “Power Present” Status Outputs
Charge Status Output
Automatic Recharge
Available in a Thermally Enhanced, Low Profile
(0.75mm) 10-Lead (3mm
×
3mm) DFN Package
APPLICATIONS
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Cellular Telephones
Handheld Computers
Portable MP3 Players
Digital Cameras
TYPICAL APPLICATION
Dual Input Battery Charger for Single-Cell Li-Ion
WALL
ADAPTER
USB
PORT
1μF
1μF
LTC4075HVX
DCIN
USBIN
IUSB
ITERM
GND
2k
1%
4075hvx TA01
Charge Current vs Supply Voltage
900
800
700
600
I
BAT
(mA)
CHARGE FROM DCIN
800mA (WALL)
500mA (USB)
R
IDC
= 1.24k
R
IUSB
= 2k
V
BAT
= 3.5V
BAT
+
2k
IDC
1% 1.24k
1%
4.2V
SINGLE CELL
Li-Ion BATTERY
500
400
300
200
100
0
2
3
4
5
6
7
8
SUPPLY VOLTAGE (V)
19
20
CHARGE
FROM USBIN
4075hvx TA01b
4075hvxf
1
LTC4075HVX
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
TOP VIEW
USBIN
IUSB
ITERM
PWR
CHRG
1
2
3
4
5
11
10 DCIN
9 BAT
8 IDC
7 USBPWR
6 ENABLE
Input Supply Voltage (DCIN, USBIN) ............–0.3 to 22V
ENABLE,
⎯
C
⎯
H
⎯
R
⎯
G,
⎯
P
⎯
W
⎯
R, USBPWR, BAT ............–0.3 to 6V
IDC, IUSB, ITERM Pin Current .................................1mA
DCIN, USBIN, BAT Pin Current ....................................1A
BAT Short-Circuit Duration............................Continuous
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 40°C/W (Note 3)
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LTC4075HVXEDD
DD PART MARKING
LCQM
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
DCIN
V
USBIN
I
DCIN
PARAMETER
Operating Supply Voltage
Operating Supply Voltage
DCIN Supply Current
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DCIN
= 5V, V
USBIN
= 5V unless otherwise noted.
CONDITIONS
●
●
MIN
4.3
4.3
TYP
MAX
5.5
5.5
UNITS
V
V
μA
μA
μA
μA
μA
μA
μA
μA
μA
V
V
mA
mA
mA
μA
μA
μA
V
V
Charge Mode (Note 4), R
IDC
= 10k
Standby Mode; Charge Terminated
Shutdown Mode (ENABLE = 5V)
Overvoltage Mode (V
DCIN
= 10V)
Charge Mode (Note 5), R
IUSB
= 10k, V
DCIN
= 2V
Standby Mode; Charge Terminated, V
DCIN
= 2V
Shutdown (V
DCIN
= 2V, ENABLE = 0V)
Overvoltage Mode (V
USBIN
= 10V)
V
DCIN
> V
USBIN
I
BAT
= 1mA
I
BAT
= 1mA, 0°C < T
A
< 85°C
R
IDC
= 1.25k, Constant-Current Mode
R
IUSB
= 2.1k, Constant-Current Mode
R
IDC
= 10k or R
IUSB
= 10k
Standby Mode, Charge Terminated
Shutdown Mode (Charger Disabled)
Sleep Mode (V
DCIN
= 0V, V
USBIN
= 0V)
Constant-Current Mode
Constant-Current Mode
R
ITERM
= 1k
R
ITERM
= 2k
R
ITERM
= 10k
R
ITERM
= 20k
●
●
350
70
40
70
350
70
40
70
23
4.185
4.165
4.2
4.2
800
476
100
–7.5
–7.5
–7.5
1
1
800
120
80
140
800
120
80
140
40
4.215
4.235
855
510
107
–12
–12
–12
I
USBIN
USBIN Supply Current
●
●
V
FLOAT
I
BAT
Regulated Output (Float) Voltage
BAT Pin Current
●
●
●
745
443
93
V
IDC
V
IUSB
I
TERMINATE
IDC Pin Regulated Voltage
IUSB Pin Regulated Voltage
Charge Current Termination Threshold
●
●
●
●
85
42
8
3.5
100
50
10
5
115
58
12
6.5
mA
mA
mA
mA
4075hvxf
2
LTC4075HVX
ELECTRICAL CHARACTERISTICS
V
UVDC
V
UVUSB
V
OVDC
V
OVUSB
V
ASD-DC
V
ASD-USB
V
ENABLE
R
ENABLE
V
OL
ΔV
RECHRG
t
RECHRG
t
TERMINATE
R
ON-DC
R
ON-USB
T
LIM
DCIN Undervoltage Lockout Voltage
USBIN Undervoltage Lockout Voltage
DCIN Overvoltage Lockout Voltage
USBIN Overvoltage Lockout Voltage
V
DCIN
– V
BAT
Lockout Threshold
V
USBIN
– V
BAT
Lockout Threshold
ENABLE Input Threshold Voltage
ENABLE Pulldown Resistance
Output Low Voltage
(
⎯
C
⎯
H
⎯
R
⎯
G,
⎯
P
⎯
W
⎯
R, USBPWR)
Recharge Battery Threshold Voltage
Recharge Comparator Filter Time
Termination Comparator Filter Time
Power FET “ON” Resistance
(Between DCIN and BAT)
Power FET “ON” Resistance
(Between USBIN and BAT)
Junction Temperature in Constant-
Temperature Mode
I
SINK
= 5mA
V
FLOAT
– V
RECHRG
, 0°C < T
A
< 85°C
V
BAT
from High to Low
I
BAT
Drops Below Termination Threshold
90
2.25
1
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DCIN
= 5V, V
USBIN
= 5V unless otherwise noted.
From Low to High
Hysteresis
From Low to High
Hysteresis
From Low to High
Hysteresis
From Low to High
Hysteresis
V
DCIN
from Low to High, V
BAT
= 4.2V
V
DCIN
from High to Low, V
BAT
= 4.2V
V
USBIN
from Low to High
V
USBIN
from High to Low
4
3.8
5.8
5.8
70
10
70
10
0.6
1
4.15
190
3.95
170
6
185
6
185
120
40
120
40
0.9
2
0.12
125
4.1
1.6
600
700
125
4.3
4.1
6.2
6.2
170
70
170
70
1.2
3.5
0.35
160
6.75
2.4
V
mV
V
mV
V
mV
V
mV
mV
mV
mV
mV
V
MΩ
V
mV
ms
ms
mΩ
mΩ
°C
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 LTC4075HVX is guaranteed to meet the 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:
Failure to correctly solder the exposed backside of the package to
the PC board will result in a thermal resistance much higher than 40°C/W.
See Thermal Considerations.
Note 4:
Supply current includes IDC and ITERM pin current (approximately
100μA each) but does not include any current delivered to the battery
through the BAT pin.
Note 5:
Supply current includes IUSB and ITERM pin current
(approximately 100μA each) but does not include any current delivered to
the battery through the BAT pin.
4075hvxf
3
LTC4075HVX
TYPICAL PERFORMANCE CHARACTERISTICS
Regulated Output (Float) Voltage
vs Charge Current
4.26
4.24
4.22
V
FLOAT
(V)
V
FLOAT
(V)
4.20
4.18
4.16
4.14
4.12
4.10
0
100 200 300 400 500 600 700 800 900
I
BAT
(mA)
4075hvx G01
T
A
= 25°C unless otherwise noted.
IDC Pin Voltage vs Temperature
(Constant-Current Mode)
1.008
1.006
1.004
1.002
V
IDC
(V)
1.000
0.998
0.996
0.994
V
DCIN
= 5V
Regulated Output (Float) Voltage
vs Temperature
4.220
V
DCIN
= V
USBIN
= 5V
4.215
4.210
V
DCIN
= V
USBIN
= 5V
R
IDC
= 1.24k
4.205
4.200
4.195
4.190
4.185
4.180
–10
10
30
50
TEMPERATURE (°C)
70
90
R
IDC
= R
IUSB
= 2k
0.992
–10
10
30
50
TEMPERATURE (°C)
70
90
4075hvx G02
4075hvx G03
IUSB Pin Voltage vs Temperature
(Constant-Current Mode)
1.008
1.006
1.004
I
BAT
(mA)
V
IUSB
(V)
1.002
1.000
0.998
0.996
0.994
0.992
–10
10
30
50
TEMPERATURE (°C)
70
90
V
USBIN
= 5V
900
800
700
600
500
400
300
200
100
0
Charge Current vs IDC Pin
Voltage
V
DCIN
= 5V
R
IDC
= 1.24k
900
800
Charge Current vs IUSB Pin
Voltage
V
USBIN
= 5V
R
IUSB
= 1.24k
700
600
I
BAT
(mA)
500
400
300
200
R
IUSB
= 2k
R
IDC
= 2k
R
IDC
= 10k
R
IUSB
= 10k
100
0
1.2
0
0.2
0.4
0.6
0.8
V
IUSB
(V)
1.0
1.2
0
0.2
0.4
0.6
0.8
V
IDC
(V)
1.0
4075hvx G04
4075hvx G05
4075hvx G06
⎯
P
⎯
W
⎯
R Pin I-V Curve
60
50
40
30
20
10
0
0
1
2
3
V
PWR
(V)
4075hvx G07
⎯
C
⎯
H
⎯
R
⎯
G Pin I-V Curve
60
50
40
I
CHRG
(mA)
30
20
10
0
4
5
6
0
1
2
3
V
CHRG
(V)
4075hvx G08
USBPWR Pin I-V Curve
60
50
40
30
20
10
0
4
5
6
0
1
2
3
4
V
USBPWR
(V)
5
6
V
DCIN
= 5V, V
USBIN
= 0V
V
DCIN
= V
USBIN
= 5V
V
DCIN
= V
USBIN
= 5V
I
USBPWR
(mA)
I
PWR
(mA)
4075hvx G09
4075hvxf
4
LTC4075HVX
TYPICAL PERFORMANCE CHARACTERISTICS
Charge Current vs Ambient
Temperature
900
800
700
600
I
BAT
(mA)
I
BAT
(mA)
R
IDC
= 2k
500
400
300
200
V
DCIN
= V
USBIN
= 5V
100 V
BAT
= 4V
θ
JA
= 30°C/W
0
–10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4075hvx G10
T
A
= 25°C unless otherwise noted.
Charge Current vs
Supply Voltage
900
800
700
600
500
400
300
200
100
0
4.0
4.5
5.0
5.5 6.0 6.5
V
DCIN
(V)
R
IDC
= 1.24V
V
BAT
= 4V
θ
JA
= 30°C/W
7.0
7.5
8.0
200
I
BAT
(mA)
600
800
1000
Charge Current vs Battery Voltage
R
IDC
= 1.24k
400
0
2.4
V
DCIN
= V
USBIN
= 5V
R
IDC
= 1.25V
θ
JA
= 30°C/W
2.7
3.0
3.3 3.6
V
BAT
(V)
3.9
4.2
4.5
4075hvx G11
4075hvx G12
DCIN Power FET On-Resistance
vs Temperature
800
750
700
650
600
550
500
–10
V
BAT
= 4V
I
BAT
= 200mA
900
850
800
USBIN Power FET On-Resistance
vs Temperature
V
BAT
= 4V
I
BAT
= 200mA
1000
980
960
V
ENABLE
(V)
940
920
900
650
600
–10
880
ENABLE Pin Threshold Voltage
(On-to-Off) vs Temperature
V
DCIN
= V
USBIN
= 5V
R
DS(ON)
(mΩ)
R
DS(ON)
(mΩ)
750
700
10
30
50
TEMPERATURE (°C)
70
90
10
30
50
TEMPERATURE (°C)
70
90
860
–10
10
30
50
TEMPERATURE (°C)
70
90
4075hvx G13
4075hvx G14
4075hvx G15
USBIN Shutdown Current vs
Temperature
60
55
50
I
USBIN
(μA)
45
40
35
30
25
20
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
V
USBIN
= 4.3V
V
USBIN
= 5V
I
DCIN
(μA)
V
ENABLE
= 0V
60
55
50
45
40
35
30
25
DCIN Shutdown Current vs
Temperature
V
ENABLE
= 5V
2.4
2.3
V
DCIN
= 5V
R
ENABLE
(MΩ)
V
DCIN
= 4.3V
–25
0
25
50
TEMPERATURE (°C)
75
100
2.2
2.1
2.0
1.9
1.8
1.7
ENABLE Pin Pulldown Resistance
vs Temperature
20
–50
1.6
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
4075hvx G16
4075hvx G17
4075hvx G18
4075hvxf
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