LTC4067
USB Power Manager
with OVP and
Li-Ion/Polymer Charger
FEATURES
Programmable Input Current Limit:
■
Single Resistor at CLPROG Pin to Set and Monitor
Input Current
Battery Charger/Ideal Diode/Controller:
■
13V Overvoltage Protection
■
Full Featured Battery Charger with 4.2V Float
■
Up to 1.25A Programmable Charge Current
■
Thermal Regulation Maximizes Charge Current
Without Risk of Overheating
■
Internal 2 Hour Termination Timer from Onset of
Voltage Mode Charging
■
Automatic Load Switchover to Battery Power with
Internal Ideal Diode and Drive Output for Optional
External MOSFET
■
NTC Thermistor Input
■
Bad Battery Time-Out Detection
■
4mm × 3mm 12-Lead DFN Package
DESCRIPTIO
The LTC
®
4067 is a USB power management and Li-Ion/
Polymer battery charger designed for portable battery
powered applications. The part controls total current used
by the USB peripheral for operation and battery charging.
The total input current may be left unregulated, or it may
be limited to 20% or 100% of the programmed value up
to 1.5A (typically 500mA). Battery charge current is au-
tomatically reduced such that the sum of the load current
and the charge current does not exceed the programmed
input current.
With the addition of an external P-channel MOSFET the
LTC4067 can withstand voltages up to 13V.
The LTC4067 includes a complete constant current/con-
stant voltage linear charger for single cell Li-Ion batteries.
The float voltage applied to the battery is held to a tight
0.4% tolerance, and charge current is programmed using
an external resistor to ground. An end-of-charge status
output,
⎯
C
⎯
H
⎯
R
⎯
G, indicates full charge. Also featured is an
NTC thermistor input used to monitor battery temperature
while charging.
The LTC4067 is available in a 12-lead low profile 4mm
×
3mm DFN package.
APPLICATIO S
■
■
■
Automatic Battery Charging/Load Switchover
Backup Battery Charger
Uninterrupted Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
OVI
WALL
OR
USB
10nF
OVP
IN
1μF
10μF
I
LOAD
OUT
10μF
V
OVI
5V/DIV
5V TO 12V
I
IN
500mA/DIV
V
OUT
5V/DIV
BAT
LTC4067
1-CELL
Li-Ion
I
LIM0
I
LIM1
CLPROG
2k
4067 TA01
CHRG
PROG
GND
2k
I
LIM0
L
L
H
H
I
LIM1
H
L
H
L
I
IN(MAX)
O (SUSPEND)
200V/R
CLPROG
1000V/R
CLPROG
FIXED (2A)
V
OVP
5V/DIV
1ms/DIV
4067 TA01b
U
OVP Response to Ramp Input at OVI
V
BAT
= 4.2V
4067f
U
U
1
LTC4067
ABSOLUTE
(Note 1)
AXI U RATI GS
IN, OUT, BAT Voltage
(t < 1ms, Duty Cycle < 1%)...................... –0.3V to 7V
Steady State, IN, OUT, BAT Voltage .............. –0.3V to 6V
NTC, I
LIM0
, I
LIM1
, PROG, CLPROG,
⎯
C
⎯
H
⎯
R
⎯
G, GATE
Voltages (Note 6) ....................................–0.3V to V
CC
OVI, OVP Voltages ..................................... –0.3V to 13V
Operating Temperature Range ................. –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
Max Junction Temperature (T
JMAX
) ..................... 125°C
The
●
denotes the specifications which apply over the full operating
temperature range (Note 3), otherwise specifications are at T
A
= 25°C. Note 2 unless otherwise noted, V
IN
= 5V, V
BAT
= 3.7V,
V
ILIM0
= 0V, V
ILIM1
= 0V, R
PROG
= 2k, R
CLPROG
= 2k, V
OVI
= 0V, V
NTC
= V
IN
/2.
SYMBOL
V
IN
I
IN
PARAMETER
IN Supply Voltage
Input Supply Current
V
NTC
= 5V (Forces I
BAT
= I
PROG
= 0)
SUSPEND: V
ILIM0
= 0V, V
ILIM1
= 5V, No Load
SHUTDOWN: V
PROG
= 5V
V
BAT
= 4.3V, Charging Stopped
SUSPEND: V
ILIM0
= 0V V
ILIM1
= 5V, No Load, V
IN
= 5.5V
SHUTDOWN: V
PROG
= 5V
IDEAL DIODE: V
IN
= Float, BAT Powers OUT, No Load
V
OUT
= 4V, I
LIM0
= 5V I
LIM1
= 0V (Note 7)
CONDITIONS
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
I
BAT
Battery Supply Current
I
IN(MAX)
Maximum Input Current Limit
2
U
W W
W
PACKAGE/ORDER INFORMATION
TOP VIEW
CLPROG
CHRG
NTC
I
LIM0
I
LIM1
OVI
1
2
3
13
4
5
6
9
8
7
GATE
PROG
OVP
12 IN
11 OUT
10 BAT
DE PACKAGE
12-LEAD (4mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LTC4067EDE
DE PART MARKING
4067
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.
MIN
TYP
0.4
52
12
14
6
2.5
60
MAX
5.5
1.2
90
30
30
12
5
100
UNITS
V
mA
μA
μA
μA
μA
μA
μA
A
1.5
2
4067f
LTC4067
The
●
denotes the specifications which apply over the full operating
temperature range (Note 3), otherwise specifications are at T
A
= 25°C. Note 2 unless otherwise noted, V
IN
= 5V, V
BAT
= 3.7V,
V
ILIM0
= 0V, V
ILIM1
= 0V, R
PROG
= 2k, R
CLPROG
= 2k, V
OVI
= 0V, V
NTC
= V
IN
/2.
SYMBOL
V
IUVLO
V
BUVLO
Current Limit
R
FWD,IN
I
LIM
V
CLPROG
I
SS
V
FLOAT
I
CC-CHG
I
CHG(MAX)
V
PROG
On-Resistance of Input Power FET
Input Current Limit
CLPROG Pin Servo Voltage
Soft Start Inrush Current
Regulated Output Voltage
Constant-Current Mode Charge
Current
Maximum Charge Current
PROG Pin Servo Voltage
I
OUT
= 200mA
HPWR Mode: V
ILIM0
= V
ILIM1
= 5V
LPWR Mode
HPWR Mode: V
ILIM0
= V
ILIM1
= V
CC
, V
OUT
= 4V
LPWR Mode : V
OUT
= 4V
R
CLPROG
= 4k, Short at OUT (Note 8)
I
BAT
= –2mA
(0°C – 85°C); I
BAT
= –2mA
R
PROG
= 2k, No Load at OUT
R
PROG
= 1k, No Load at OUT, R
CLPROG
= 1k
R
PROG
= R
CLPROG
= 0 (Note 7)
R
PROG
= 2k; I
BAT
= –500mA
R
PROG
= 1k; I
BAT
= –1A
R
PROG
= 2k, V
BAT
< V
TRIKL
, I
BAT
= I
TRIKL
V
BAT
= 4.2V; As A Ratio to Full BAT Charge Current
(I
CC-CHG
)
V
BAT
= 2V
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
PARAMETER
IN Undervoltage Lockout
BAT Undervoltage Lockout
CONDITIONS
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
●
MIN
3.5
2.5
TYP
3.8
3.675
2.8
2.7
220
MAX
4
3
UNITS
V
V
V
mΩ
525
110
1.05
0.22
mA
mA
V
V
mA/μs
4.215
4.234
530
1060
1020
1020
110
0.106
60
135
2.3
V
V
mA
mA
A
mV
mV
mV
mA/mA
mA
mV
hrs
%
°C
475
90
0.95
0.18
500
98
1
0.2
0.3
Battery Charger
4.185
4.167
470
940
980
980
90
0.08
35
65
1.7
Percent of Total Charge Time, V
BAT
< 2.8V
(Note 4)
4.2
4.2
500
1000
2
1000
1000
100
0.093
50
100
2
25
105
I
EOC
I
TRIKL
V
RECHRG
t
TIMER
T
LIM
Ideal Diode
R
FWD
R
DIO,ON
V
FWD
End-of-Charge BAT Current
Trickle Charge Current
TIMER Period
Low Battery Trickle Charge Time
Junction Temperature in Constant
Temperature Mode
On-Resistance, V
ON
Regulation
On-Resistance V
BAT
to V
OUT
Recharge Battery Threshold Voltage V
FLOAT
– V
RECHRG
V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V, I
OUT
= –200mA,
Measured as
ΔV/ΔI
V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V, I
OUT
= –1A
●
200
220
10
25
70
240
2.1
1.9
1.9
40
mΩ
mΩ
mV
mV
mV
A
mA
mA
Voltage Forward Drop (V
BAT
– V
OUT
) V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V, I
OUT
= –1mA
V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V, I
OUT
= –200mA
V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V, I
OUT
= –1A
Ideal Diode Current Limit
GATE Pin Output Pull Up Current
V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V (Notes 4, 5)
V
OUT
> V
BAT
, V
GATE
= 0V
I
D(MAX)
I
GPU
I
GPD
1.5
GATE Pin Output Pull Down Current V
ILIM0
= 0V, V
ILIM1
= 5V, V
BAT
= 4.3V, I
OUT
= 1A,
V
GATE
= 4.3V
4067f
3
LTC4067
ELECTRICAL CHARACTERISTICS
SYMBOL
NTC
I
NTC
V
COLD
V
HOT
V
DIS
Logic
F
MOD
F
PW
F
TF
V
OL
V
IH
V
lL
I
PULLDN
V
OVTH
V
PROG,SD
Serrated Fault Pulse Modulation
Frequency at
⎯
C
⎯
H
⎯
R
⎯
G Pin
⎯ ⎯
Serrated Fault Pulse Width at CH
⎯
R
⎯
G
Pin
Serrated Fault Pulse Frequency at
⎯
C
⎯
H
⎯
R
⎯
G Pin
⎯ ⎯ ⎯ ⎯
Output Low Voltage (CHRG)
Enable Input High Voltage
Enable Input Low Voltage
Logic Input Pull Down Current
Overvoltage Protection Threshold
(OVI Pin)
Shutdown Threshold
(V
DIS
< V
NTC
< V
HOT
) or (V
NTC
> V
COLD
)
V
BAT
< 2.9V for Longer Than Trickle Charge Time
(V
DIS
< V
NTC
< V
HOT
) or (V
NTC
> V
COLD
)
V
BAT
< 2.9V for Longer Than Trickle Charge Time
(V
DIS
< V
NTC
< V
HOT
) or (V
NTC
> V
COLD
) or
V
BAT
< 2.9V for Longer Than Trickle Charge Time
I
SINK
= 5mA
ILIM0, ILIM1 Pin Low to High
ILIM0, ILIM1 Pin High to Low
ILIM0, ILIM1
V
OVI
Rising Threshold
Hysteresis
V
CC
– V
PROG
Rising (Note 6)
Hysteresis
5.8
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range (Note 3), otherwise specifications are at T
A
= 25°C. Note 2 unless otherwise noted, V
IN
= 5V, V
BAT
= 3.7V,
V
ILIM0
= 0V, V
ILIM1
= 0V, R
PROG
= 2k, R
CLPROG
= 2k, V
OVI
= 0V, V
NTC
= V
IN
/2.
PARAMETER
NTC Input Leakage Current
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Voltage
CONDITIONS
V
NTC
= 2.5V
Rising Threshold
Hysteresis
Falling Threshold
Hysteresis
NTC Input voltage to GND (Falling)
Hysteresis
●
MIN
TYP
0
MAX
±1
UNITS
μA
V
V
V
V
mV
mV
Hz
Hz
μs
μs
kHz
0.725 • V
IN
0.733 • V
IN
0.741 • V
IN
0.02 • V
IN
0.287 • V
IN
0.29 • V
IN
0.293 • V
IN
0.02 • V
IN
80
100
30
1.5
6
1.33
2.62
35
1.5
1.2
0.4
2
6
250
1.4
50
3.5
6.2
120
V
V
V
μA
V
mV
V
mV
μA
I
PROG,PULLUP
PROG Pin Shutdown Sense Current V
PROG
= 1V
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:
Current into a pin is positive and current out of a pin is negative.
All Voltages referenced to GND
Note 3:
The LTC4067 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C ambient
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4:
Specification is guaranteed by design and not 100% tested in
production.
Note 5:
This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature exceeds 125°C when over-temperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
Note 6:
V
CC
is the greater of V
IN
, V
OUT
or V
BAT
.
Note 7:
Accuracy of programmed current may degrade for currents greater
than 1A.
Note 8:
CLPROG soft-start scales with inverse of CLPROG resistor. If
R
CLPROG
= 2k, then I
SS
= 0.6mA/μs.
4067f
4
LTC4067
TYPICAL PERFOR A CE CHARACTERISTICS
Input Supply Current vs
Temperature (Shutdown Mode)
16
14
12
I
Q(SUSP)
(μA)
I
Q(SD)
(μA)
10
8
6
4
2
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4067 G01
50
40
30
20
10
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4067 G02
I
Q
(μA)
Battery Current vs Temperature
90
IN = OUT = FLOAT
80 V
BAT
= 3.7V
70
I
Q(BATSD)
(μA)
I
Q(BAT)
(μA)
60
50
40
30
20
2
10
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4067 G04
6
4
I
LIM
(mA)
Input Current Limit vs
Temperature (Low Power)
102
V
CLPROG
100
98
I
LIM
(mA)
I
LIM
96
94
92
90
–50
192
188
184
180
125
200
800
V
CLPROG
(mV)
196
204
1000
600
V
OUT
= 4V
R
CLPROG
= 2k
400
I
OUT
= 200mA
LPWR
200
R
ON
(mΩ)
–25
0
25
50
75
TEMPERATURE (°C)
U W
100
4067 G06
Input Supply Current vs
Temperature (Suspend Mode)
90
80
70
60
450
400
350
300
250
200
150
100
50
Input Supply Current vs
Temperature
CHARGER ENTERS
THERMAL REGULATION
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4067 G03
Battery Current vs Temperature
(Shutdown)
12
10
8
510
Input Current Limit vs
Temperature (High Power)
1010
V
CLPROG
505
500
I
LIM
495
490
485
480
–50 –25
980
25 50 75 100 125 150
TEMPERATURE (°C)
4067 G05
1000
V
CLPROG
(mV)
990
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4067 G09
0
V
CLPROG
vs Temperature
at I
IN
= 500mA
240
HPWR
R
ON
vs Temperature
V
IN
= 4.45V
R
CLPROG
= 0k
220 HPWR
200
V
CLPROG
(mV)
180
160
140
120
R
ON
, 1A
R
ON
, 500mA
R
ON
, 200mA
R
ON
, 100mA
–25
0
25
50
75
TEMPERATURE (°C)
100
125
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
4067 G07
100
–50
4067 G08
4067f
5
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