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LTC4071EMS8E#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
LTC4071
1
4071fc
Typical applicaTion
DescripTion
Li-Ion/Polymer Shunt
Battery Charger System with
Low Battery Disconnect
The LTC
®
4071 allows simple charging of Li-Ion/Polymer
batteries from very low current, intermittent or continuous
charging sources. A near-zero current low battery latch-
ing disconnect function protects even the lowest capacity
batteries from deep discharge and potentially irreparable
damage. The 550nA to 50mA operating current makes
charging possible from previously unusable sources. With
its low operating current the LTC4071 is well suited to
charge low capacity Li-Ion or thin film batteries in energy
harvesting applications. The unique architecture of the
LTC4071 allows for an extremely simple battery charger
solution, requiring just one external resistor.
The LTC4071 offers a pin selectable float voltage with ±1%
accuracy. The integrated thermal battery qualifier extends
battery lifetime and improves reliability by automatically
reducing the battery float voltage at NTC thermistor tem-
peratures above 40°C. The LTC4071 also provides two
pin selectable low battery disconnect levels and a high
battery status output.
The device is offered in two thermally enhanced packages,
a compact low profile (0.75mm) 8-lead (2mm × 3mm)
DFN and an 8-lead MSOP package.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
FeaTures
applicaTions
n
Charger Plus Pack Protection in One IC
n
Low Operating Current (550nA)
n
Near Zero Current (<0.1nA) Low Battery Disconnect
Function to Protect Batteries from Over-Discharge
n
Pin Selectable Low Battery Disconnect Level:
2.7V or 3.2V
n
1% Float Voltage Accuracy Over Temperature
n
50mA Maximum Internal Shunt Current
n
Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V
n
Ultralow Power Pulsed NTC Float Conditioning for
Li-Ion/Polymer Protection
n
Suitable for Intermittent, Continuous and Very Low
Power Charging Sources
n
High Battery Status Output
n
Thermally Enhanced, Low Profile (0.75mm)
8-Lead (2mm × 3mm) DFN and MSOP Packages
n
Low Capacity, Li-Ion/Polymer Battery Back-Up
n
Thin Film Batteries
n
Energy Scavenging/Harvesting
n
Solar Power Systems with Back-Up
n
Memory Back-Up
n
Embedded Automotive
4071 TA01a
LTC4071
ADJ BAT
R
IN
GND
Li-Ion
NTC
V
CC
V
IN
LBSEL
+
TO SYSTEM LOAD: V
CC
1µF
TEMPERATURE (°C)
–25 0
I
LEAK
(A)
10p
125
4071 TA01b
1p
0.1p
5025 75 100
1n
100p
10n
100n
V
BAT
= 2.65V
Battery Disconnect I
LEAK
vs Temperature
LTC4071
2
4071fc
absoluTe MaxiMuM raTings
I
CC
, I
BAT
.............................................±60mA Continuous
I
BAT
...............................400mA for Single Pulse < 10ms
I
CC
............................... –400mA for Single Pulse < 10ms
ADJ, NTC, NTCBIAS, HBO Voltages .. –0.3V to V
CC
+ 0.3V
(Notes 1, 2)
TOP VIEW
9
GND
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
5
6
7
8
4
3
2
1NTCBIAS
NTC
ADJ
HBO
V
CC
BAT
GND
LBSEL
T
JMAX
= 125°C, θ
JA
= 76°C/W
EXPOSED PAD (PIN 9) IS NOT INTERNALLY CONNECTED,
MUST BE SOLDERED TO PCB, GND TO OBTAIN θ
JA
1
2
3
4
NTCBIAS
NTC
ADJ
HBO
8
7
6
5
V
CC
BAT
GND
LBSEL
TOP VIEW
9
GND
MS8E PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 40°C/W
EXPOSED PAD (PIN 9) IS NOT INTERNALLY CONNECTED,
MUST BE SOLDERED TO PCB, GND TO OBTAIN θ
JA
pin conFiguraTion
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4071EDDB#PBF LTC4071EDDB#TRPBF LFXF
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
LTC4071IDDB#PBF LTC4071IDDB#TRPBF LFXF
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
LTC4071EMS8E#PBF LTC4071EMS8E#TRPBF LTFXG 8-Lead Plastic MSOP –40°C to 125°C
LTC4071IMS8E#PBF LTC4071IMS8E#TRPBF LTFXG 8-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
LBSEL Voltage ............................................. –0.3V to 6V
Operating Junction Temperature Range .. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Peak Reflow Temperature ..................................... 260°C
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
junction temperature range. Conditions are V
NTC
= V
ADJ
= V
CC
, V
LBSEL
= GND, T
A
= 25°C unless otherwise specified. Current into a pin
is positive and current out of a pin is negative. All voltages are referenced to GND unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
FLOAT
Programmable Float Voltage
10µA ≤ I
CC
≤ 25mA
V
ADJ
= 0V, 0°C < Temp < 125°C
V
ADJ
= 0V
l
3.96
3.88
4.0
4.0
4.04
4.04
V
V
V
ADJ
= Float, 0°C < Temp < 125°C
V
ADJ
= Float
l
4.06
3.98
4.1
4.1
4.14
4.14
V
V
V
ADJ
= V
CC
, 0°C < Temp < 125°C
V
ADJ
= V
CC
l
4.16
4.07
4.2
4.2
4.24
4.24
V
V
I
CCMAX
Maximum Shunt Current V
CC
> V
FLOAT
l
50 mA
I
CCQ
V
CC
Operating Current V
HBO
Low, ADJ = V
CC
l
550 1200 nA
LTC4071
3
4071fc
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 LTC4071 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC4071E is guaranteed to meet performance specifications
for junction temperatures from 0°C to 85°C. Specifications over the
The l denotes the specifications which apply over the full operating
junction temperature range. Conditions are V
NTC
= V
ADJ
= V
CC
, V
LBSEL
= GND, T
J
= 25°C unless otherwise specified. Current into a pin
is positive and current out of a pin is negative. All voltages are referenced to GND unless otherwise noted. (Note 2)
–40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTC4071I is guaranteed over the full –40°C to 125°C operating
junction temperature range. Note that the maximum ambient temperature
consistent with these specifications is determined by specific operation
conditions in conjunction with board layout, the rated package thermal
impedance and other environmental factors.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Low Battery Disconnect
I
LEAK
Battery Disconnect Leakage
Current
V
CC
< V
BAT
= 2.65V
l
0.01
0.01
25 nA
nA
R
DSON
Resistance of V
CC
– BAT Switch I
BAT
= –1mA, V
HBO
High 4 6 Ω
V
LBD
Low Battery Disconnect V
BAT
Falling, I
BAT
= –1mA, LBSEL = V
CC
, 0°C < Temp < 125°C 2.60 2.70 2.79 V
V
BAT
Falling, I
BAT
= –1mA, LBSEL = V
CC
l
2.52 2.70 2.79 V
V
BAT
Falling, I
BAT
= –1mA, LBSEL = GND, 0°C < Temp < 125°C 3.05 3.20 3.28 V
V
BAT
Falling, I
BAT
= –1mA, LBSEL = GND
l
2.95 3.20 3.28 V
V
LBC_BAT
Low Battery Connect V
BAT
Rising, I
BAT
= –1mA, LBSEL = V
CC
2.97 V
V
BAT
Rising, I
BAT
= –1mA, LBSEL = GND 3.53 V
V
LBC_VCC
Low Battery Connect V
CC
Rising, LBSEL = V
CC
V
CC
Rising, LBSEL = GND
3.6
4.19
V
V
High Battery Status
V
HBTH
HBO Threshold (V
FLOAT
– V
CC
) V
CC
Rising
l
15 40 75 mV
V
HBHY
Hysteresis 100 mV
Status Output: HBO
V
OL
CMOS Output Low I
SINK
= 1mA, V
CC
= 3.7V 0.5 V
V
OH
CMOS Output High I
SOURCE
= –0.5mA, I
CC
= 1.5mA V
CC
– 0.6 V
Selection Inputs: ADJ, LBSEL
V
ADJ_IL
ADJ V
IL
Input Logic Low Level
l
0.3 V
V
ADJ_IH
ADJ V
IH
Input Logic High Level
l
V
CC
– 0.3 V
I
ADJ(Z)
Allowable ADJ Leakage Current
in Floating State
l
±3 µA
V
LBSEL_IL
LBSEL V
IL
Input Logic Low Level
l
250 mV
V
LBSEL_IH
LBSEL V
IH
Input Logic High Level
l
1.4 V
I
LBSEL
LBSEL Leakage Current 0 ≤ LBSEL ≤ V
CC
l
–5 0 5 nA
NTC
I
NTC
NTC Leakage Current 0V ≤ NTC ≤ V
CC
l
–5 0 5 nA
I
NTCBIAS
Average NTCBIAS Sink Current Pulsed Duty Cycle < 0.002% 30 50 pA
NTC
TH1
NTC Comparator Falling
Thresholds
V
NTC
as Percentage of V
NTCBIAS
Amplitude 35.5 36.5 38 %
NTC
TH2
28.0 29.0 30.5 %
NTC
TH3
21.8 22.8 23.8 %
NTC
TH4
16.8 17.8 18.8 %
NTC
HY
Hysteresis 30 mV
∆V
FLOAT(NTC)
Delta Float Voltage per NTC
Comparator Step
NTC Falling Below One of the NTC
TH
Thresholds
ADJ = 0V
ADJ = Floating
ADJ = V
CC
–57
–82
–107
–50
–75
–100
–43
–68
–93
mV
mV
mV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

LTC4071EMS8E#PBF

Mfr. #:
Buy LTC4071EMS8E#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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