FEATURES
n
LTC4160/LTC4160-1
Switching Power Manager
with USB On-The-Go And
Overvoltage Protection
DESCRIPTION
The LTC
®
4160/LTC4160-1 are high efficiency power man-
agement and Li-Ion/Polymer battery charger ICs. They each
include a bidirectional switching PowerPath™ controller
with automatic load prioritization, a battery charger, and
an ideal diode.
The LTC4160/LTC4160-1’s bidirectional switching regulator
transfers nearly all of the power available from the USB
port to the load with minimal loss and heat which eases
thermal constraints in small spaces. These devices feature
a precision input current limit for USB compatibility and
Bat-Track output control for efficient charging. In addition,
the ICs can also generate 5V at 500mA for USB On-The-
Go applications.
An overvoltage circuit protects the LTC4160/LTC4160-1
from high voltage damage on the USB/wall adapter inputs
with an external N-channel MOSFET and a resistor.
The LTC4160/LTC4160-1 are available in the ultra-thin
(0.55 mm) 20-pin 3mm
×
4mm UTQFN surface mount
package.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath
and Bat-Track are a trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 6522118, 6404251.
Other patents pending.
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Bidirectional Switching Regulator Makes Optimal
Use of Limited Power Available from USB Port and
also Provides a 5V Output for USB On-The-Go
Overvoltage Protection Guards Against Damage
180mΩ Internal Ideal Diode Plus Optional External
Ideal Diode Controller Seamlessly Provides Low
Loss PowerPath When Input Power is Limited or
Unavailable
Instant-On Operation with Discharged Battery
Full Featured Li-Ion/Polymer Battery Charger
Bat-Track™ Adaptive Output Control For Efficient
Charging
1.2A Max Input Current Limit
1.2A Max Charge Current with Thermal Limiting
Battery Float Voltage: 4.2V (LTC4160), 4.1V
(LTC4160-1)
Low Battery Powered Quiescent Current (8μA)
Ultra-Thin (0.55mm) 20-pin 3mm
×
4mm QFN
Package
APPLICATIONS
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Media Players and Personal Navigation Devices
Digital Cameras, PDAs, Smart Phones
TYPICAL APPLICATION
USB OTG V
BUS
Voltage
vs V
BUS
Current
5.5
V
OUT
= BAT = 3.8V
USB
V
BUS
= 4.75V
V
BUS
(V)
4.5
I
VBUS
= 500mA
USB 2.0 SPECIFICATIONS
REQUIRE THAT HIGH
POWER DEVICES NOT
OPERATE IN THIS REGION
6.2k
OPTIONAL
OVERVOLTAGE
PROTECTION
10μF
High Efficiency Power Manager/Battery Charger with USB
On-The-Go and Overvoltage Protection
USB
ON-THE-GO
V
BUS
LTC4160/
LTC4160-1
OVGATE
OVSENS
CLPROG
BAT
PROG
Li-Ion
SW
V
OUT
CURRENT (mA)
10μF
3.3μH
SYSTEM
LOAD
750
Battery and V
BUS
Currents
vs Load Current
V
BUS
CURRENT
5.0
500
250
BATTERY CURRENT
(CHARGING)
0
V
BUS
= 5V
BAT = 3.8V
5x MODE
BATTERY CURRENT
(DISCHARGING)
–500
0
200
600
800
400
LOAD CURRENT (mA)
1000
41601 TA01c
4.0
+
3.5
0.1μF
3.01k
1k
41601 TA01a
–250
3.0
0
100
200 300 400 500
V
BUS
CURRENT (mA)
600
700
41601 TA01b
41601f
1
LTC4160/LTC4160-1
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3)
PIN CONFIGURATION
TOP VIEW
NTCBIAS
CLPROG
16 I
LIM1
15 I
LIM0
21
14 SW
13 V
BUS
12 V
OUT
11 BAT
7
ENCHARGER
8
PROG
9 10
CHRG
IDGATE
LDO3V3
NTC
OVGATE 1
OVSENS 2
VBUSGD
3
FAULT
4
ID 5
ENOTG 6
V
BUS
(Transient) t < 1ms, Duty Cycle < 1% .. –0.3V to 7V
V
BUS
(Static), BAT, V
OUT,
NTC, ENOTG, ID,
ENCHARGER, VBUSGD, FAULT, CHRG.........
–0.3V to 6V
I
LIM0
, I
ILIM1
........ –0.3V to Max(V
BUS
, V
OUT
, BAT) + 0.3V
I
OVSENS
...................................................................10mA
I
CLPROG
....................................................................3mA
I
CHRG
, I
VBUSGD
, I
FAULT
.............................................50mA
I
PROG
........................................................................2mA
I
LDO3V3
...................................................................30mA
I
SW
, I
BAT
, I
VOUT
, I
VBUS
..................................................2A
Operating Temperature Range.................. –40°C to 85°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 125°C
20 19 18 17
PDC PACKAGE
20-LEAD (3mm 4mm) PLASTIC UTQFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC4160EPDC#PBF
LTC4160EPDC-1#PBF
TAPE AND REEL
LTC4160EPDC#TRPBF
LTC4160EPDC-1#TRPBF
PART MARKING
FDRT
FDST
PACKAGE DESCRIPTION
20-Lead (3mm
×
4mm) Plastic UTQFN
20-Lead (3mm
×
4mm) Plastic UTQFN
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
BUS
I
BUS(LIM)
PARAMETER
Input Supply Voltage
Total Input Current
PowerPath Switching Regulator – Step-Down Mode
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
MIN
4.35
1x Mode
5x Mode
10x Mode
Suspend Mode
1x Mode
5x, 10x Modes
Suspend Mode
1x Mode
5x Mode
10x Mode
Suspend Mode
l
l
l
l
TYP
MAX
5.5
UNITS
V
mA
mA
mA
mA
mA
mA
mA
mA/mA
mA/mA
mA/mA
mA/mA
41601f
82
440
900
0.32
90
480
955
0.43
7
20
0.050
211
1170
2377
9.6
100
500
1000
0.5
I
VBUSQ
(Note 4)
Input Quiescent Current
h
CLPROG
(Note 4) Ratio of Measured V
BUS
Current to
CL
PROG
Program Current
2
LTC4160/LTC4160-1
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
I
VOUT(POWERPATH)
V
OUT
Current Available Before
Discharging Battery
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
1x Mode, BAT = 3.3V
5x Mode, BAT = 3.3V
10x Mode, BAT = 3.3V
Suspend Mode
Switching Modes
Suspend Mode
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
1x, 5x, 10x Modes, 0V < BAT ≤ 4.2V,
I
VOUT
= 0mA, Battery Charger Off
USB Suspend Mode, I
VOUT
= 250μA
3.5
4.5
1.8
3.95
MIN
TYP
121
667
1217
0.34
1.183
100
4.3
4
200
50
BAT + 0.3
4.6
2.25
0.18
0.3
1x Mode (Note 5)
5x Mode (Note 5)
10x Mode (Note 5)
Closed Loop
0 ≤ I
VBUS
≤ 500mA, V
OUT
> 3.2V
l
MAX
UNITS
mA
mA
mA
mA
V
mV
0.26
0.43
V
CLPROG
V
UVLO
V
DUVLO
V
OUT
CLPROG Servo Voltage in Current Limit
V
BUS
Undervoltage Lockout
V
BUS
To BAT Differential Undervoltage
Lockout
V
OUT
Voltage
4.35
V
V
mV
mV
4.7
4.7
2.7
V
V
MHz
Ω
Ω
A
A
A
Ω
f
OSC
Switching Frequency
R
PMOS_POWERPATH
PMOS On-Resistance
R
NMOS_POWERPATH
NMOS On-Resistance
I
PEAK_POWERPATH
Peak Inductor Current Clamp
1
1.6
3
10
4.75
2.9
550
680
1.8
1.6
1.15
2.5
2.6
2.8
7.2
6.1
6.42
1.88 • V
OVSENS
0
1.25
4.179
4.165
4.079
4.065
1120
185
4.2
4.2
4.1
4.1
1219
206
3.8
8
4.221
4.235
4.121
4.135
1320
223
6
12
6.7
12
2.9
5.25
4.2
R
SUSP
V
BUS
V
OUT
I
VBUS
I
PEAK
I
OTGQ
V
CLPROG
V
OUTUVLO
t
SCFAULT
V
OVCUTOFF
V
OVGATE
t
RISE
Battery Charger
V
FLOAT
Suspend LDO Output Resistance
Output Voltage
Input Voltage
Output Current Limit
Peak Inductor Current Limit
V
OUT
Quiescent Current
Output Current Limit Servo Voltage
V
OUT
UVLO – V
OUT
Falling
V
OUT
UVLO – V
OUT
Rising
Short Circuit Fault Delay
Overvoltage Protection Threshold
OVGATE Output Voltage
OVGATE Time To Reach Regulation
BAT Regulated Output Voltage
PowerPath Switching Regulator – Step-Up Mode (USB On-The-Go)
V
V
mA
A
mA
V
V
V
ms
V
V
V
ms
V
V
V
V
mA
mA
μA
μA
41601f
(Note 5)
V
OUT
= 3.8V, I
VBUS
= 0mA (Note 6)
PMOS Switch Off
With 6.2k Series Resistor
V
OVSENS
< V
OVCUTOFF
V
OVSENS
> V
OVCUTOFF
OVGATE C
LOAD
= 1nF
LTC4160
LTC4160-1
Overvoltage Protection
l
l
I
CHG
I
BAT
Constant Current Mode Charger Current
Battery Drain Current
R
PROG
= 845Ω, 10x Mode R
CLPROG
≤ 2.49k
R
PROG
= 5k, 5x or 10x Mode
V
BUS
> V
UVLO
, Suspend Mode,
I
VOUT
= 0μA
V
BUS
= 0V, I
VOUT
= 0μA
(Ideal Diode Mode)
3
LTC4160/LTC4160-1
ELECTRICAL CHARACTERISTICS
SYMBOL
V
PROG
V
PROG_TRKL
V
C/10
h
PROG
I
TRKL
V
TRKL
ΔV
TRKL
ΔV
RECHRG
t
TERM
t
BADBAT
h
C/10
R
ON_CHG
T
LIM
NTC
V
COLD
V
HOT
V
DIS
I
NTC
Ideal Diode
V
FWD
R
DROPOUT
I
MAX_DIODE
V
LDO3V3
R
CL_LDO3V3
R
OL_LDO3V3
V
IL
V
IH
I
PD1
I
PU1
V
VBUSGD
V
CHRG
, V
FAULT
I
CHRG
, I
VBUSGD
,
I
FAULT
Forward Voltage Detection
Internal Diode On-Resistance, Dropout
Diode Current Limit
Regulated Output Voltage
Closed-Loop Output Resistance
Dropout Output Resistance
Logic Low Input Voltage
Logic High Input Voltage
I
LIM0
, I
LIM1
, ENOTG,
ENCHARGER
Pull-Down Current
ID Pull-Up Current
Output Low Voltage
Output Low Voltage
Leakage Current
I
VBUSGD
= 5mA, V
BUS
= 5V
I
CHRG
= I
FAULT
= 5mA, V
OUT
= 3.8V
V
CHRG
= V
VBUSGD
= V
FAULT
= 5V
1.2
1.8
2.5
65
100
100
150
1
0mA < I
LDO3V3
< 20mA
V
BUS
= 0V, I
VOUT
= 10mA
I
VOUT
= 10mA
I
VOUT
= 200mA
2
3.1
3.3
2.7
23
0.4
3.5
2
15
0.18
mV
mV
Ω
A
V
Ω
Ω
V
V
μA
μA
mV
mV
μA
Cold Temperature Fault Threshold
Voltage
Rising Threshold
Hysteresis
75
33.4
0.7
–50
76.5
1.5
34.9
1.8
1.7
50
78
36.4
2.7
50
%NTCBIAS
%NTCBIAS
%NTCBIAS
%NTCBIAS
%NTCBIAS
mV
nA
PARAMETER
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle Charge BAT < V
TRKL
C/10 Threshold Voltage at PROG
Ratio of I
BAT
to PROG Pin Current
Trickle Charge Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
Recharge Battery Threshold Voltage
Safety Timer Termination Period
Bad Battery Termination Time
End of Charge Current Ratio
Battery Charger Power FET
On-Resistance (Between V
OUT
and BAT)
Junction Temperature in Constant
Temperature Mode
Threshold Voltage Relative to V
FLOAT
Timer Starts when V
BAT
= V
FLOAT
BAT < V
TRKL
(Note 7)
–75
3.9
0.4
0.085
BAT < V
TRKL
BAT Rising
2.7
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, R
CLPROG
= 3.01k, unless
otherwise noted.
CONDITIONS
MIN
TYP
1
0.1
100
1030
100
2.85
135
–100
4.3
0.5
0.1
0.18
110
–125
5.4
0.6
0.115
3
MAX
UNITS
V
V
mV
mA/mA
mA
V
mV
mV
Hour
Hour
mA/mA
Ω
°C
Hot Temperature Fault Threshold Voltage Falling Threshold Hysteresis
NTC Disable Threshold Voltage
NTC Leakage Current
Falling Threshold
Hysteresis
NTC = NTCBIAS = 5V
Always On 3.3V LDO Supply
Logic (I
LIM0
, I
LIM1
, ID, ENOTG,
ENCHARGER)
Status Outputs (CHRG,
VBUSGD, FAULT)
41601f
4
LTC4160/LTC4160-1
ELECTRICAL CHARACTERISTICS
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 LTC4160E/LTC4160E-1 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:
The LTC4160E/LTC4160E-1 include overtemperature protection
that is intended to protect the device during momentary overload
conditions. Junction temperature will exceed 125°C when overtemperature
protection is active. Continuous operation above the specified maximum
operating junction temperature may impair device reliability.
Note 4:
Total input current is the sum of quiescent current, I
VBUSQ
, and
measured current given by V
CLPROG
/R
CLPROG
• (h
CLPROG
+ 1).
Note 5:
The current limit features of this part are intended to protect the
IC from short term or intermittent fault conditions. Continuous operation
above the maximum specified pin current rating may result in device
degradation or failure.
Note 6:
The bidirectional switcher’s supply current is bootstrapped to
V
BUS
and in the application will reflect back to V
OUT
by (V
BUS
/V
OUT
) •
1/efficiency. Total quiescent current is the sum of the current into the V
OUT
pin plus the reflected current.
Note 7:
h
C/10
is expressed as a fraction of the measured full charge current
with indicated PROG resistor.
TYPICAL PERFORMANCE CHARACTERISTICS
USB Limited Load Current vs Battery
Voltage (Battery Charger Disabled)
900
800
700
LOAD CURRENT (mA)
600
500
400
300
200
100
0
2.7
3.0
3.9
3.6
3.3
BATTERY VOLTAGE (V)
4.2
41601 G01
T
A
= 25°C, unless otherwise noted.
Battery and V
BUS
Currents vs
Load Current
750
V
BUS
CURRENT
USB Limited Load Current vs Battery
Voltage (Battery Charger Disabled)
160
140
LOAD CURRENT (mA)
120
100
80
60
40
–250
20
0
2.7
3.0
3.6
3.3
3.9
BATTERY VOLTAGE (V)
4.2
41601 G02
V
BUS
= 5V
5x MODE
V
BUS
= 5V
1x MODE
500
CURRENT (mA)
250
BATTERY CURRENT
(CHARGING)
0
V
BUS
= 5V
BAT = 3.8V
5x MODE
R
CLPROG
= 3.01k BATTERY CURRENT
R
PROG
= 1k
(DISCHARGING)
0
200
600
800
400
LOAD CURRENT (mA)
1000
41601 G03
–500
USB Limited Battery Charge
Current vs Battery Voltage
700
600
CHARGE CURRENT (mA)
500
400
300
200
100
0
2.7
3.0
3.9
3.6
3.3
BATTERY VOLTAGE (V)
4.2
41601 G04
USB Limited Battery Charge
Current vs Battery Voltage
140
120
CHARGE CURRENT (mA)
100
80
60
40
20
0
V
BUS
= 5V
1x MODE
R
PROG
= 1k
2.7
3.0
3.9
3.6
3.3
BATTERY VOLTAGE (V)
4.2
41601 G05
Battery and V
BUS
Currents
vs Load Current
1000
V
BUS
CURRENT
750
CURRENT (mA)
500
250
0
V
BUS
= 5V
BAT = 3.8V
10x MODE
R
CLPROG
= 3.01k
R
PROG
= 2k
BATTERY CURRENT
(CHARGING)
V
BUS
= 5V
5x MODE
R
PROG
= 1k
–250
–500
BATTERY CURRENT
(DISCHARGING)
1500
0
250
750 1000 1250
500
LOAD CURRENT (mA)
41601 G06
41601f
5
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