Voltages .......................................... –0.3V to V
CC
+ 0.3V
Operating Junction Temperature Range.. –40°C to 125°C
Maximum Junction Temperature ......................... 125°C
Storage Temperature Range .................. –65°C to 150°C
Peak Reflow Temperature ..................................... 260°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
NTCBIAS 1
NTC 2
ADJ 3
HBO 4
9
8
7
6
5
V
CC
DRV
LBO
GND
NTCBIAS
NTC
ADJ
HBO
1
2
3
4
8
7
6
5
V
CC
DRV
LBO
GND
9
MS8E PACKAGE
8-LEAD PLASTIC MSOP
DDB PACKAGE
8-LEAD (3mm 2mm) PLASTIC DFN
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
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
ORDER INFORMATION
LEAD FREE FINISH
LTC4070EDDB#PBF
LTC4070IDDB#PBF
LTC4070EMS8E#PBF
LTC4070IMS8E#PBF
TAPE AND REEL
LTC4070EDDB#TRPBF
LTC4070IDDB#TRPBF
LTC4070EMS8E#TRPBF
LTC4070IMS8E#TRPBF
PART MARKING*
LFPD
LFPD
LTFMT
LTFMT
PACKAGE DESCRIPTION
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–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/
The
l
denotes the specifications which apply over the full operating
junction temperature range. V
NTC
= V
CC
, 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)
SYMBOL
V
FLOAT
PARAMETER
Programmable Float Voltage
10μA ≤ I
CC
≤ 50mA
Maximum Shunt Current
V
CC
Operating Current
Low Bat V
CC
Operating Current
CONDITIONS
V
ADJ
= 0V
V
ADJ
= Float
V
ADJ
= V
CC
V
CC
> V
FLOAT
V
HBO
Low
V
CC
= 3.1V
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
3.96
4.06
4.16
50
TYP
4.0
4.1
4.2
450
300
MAX
4.04
4.14
4.24
1040
UNITS
V
V
V
mA
nA
nA
4070f
I
CCMAX
I
CCQ
I
CCQLB
2
LTC4070
ELECTRICAL CHARACTERISTICS
SYMBOL
V
HBTH
V
HBHY
V
LBTH
V
LBHY
V
OL
V
OH
PARAMETER
HBO Threshold (V
FLOAT
– V
CC
)
Hysteresis
LBO Threshold
Hysteresis
CMOS Output Low
CMOS Output High
I
SINK
= 1mA, V
CC
= 3.7V
V
LBO
: V
CC
= 3.1V, I
SOURCE
= –100μA
V
HBO
: I
CC
= 1.5mA, I
SOURCE
= –500μA
Input Logic Low Level
Input Logic High Level
I
ADJ(Z)
NTC
I
NTC
I
NTCBIAS
ΔV
FLOAT(NTC)
NTC Leakage Current
Average NTCBIAS Sink Current
Delta Float Voltage per NTC Comparator
Step
0V< NTC < V
CC
Pulsed Duty Cycle < 0.002%
I
CC
= 1mA, NTC Falling Below One of the
NTC
TH
Thresholds
ADJ = 0V
ADJ = Float
ADJ = V
CC
V
NTC
as % of V
NTCBIAS
Amplitude
35.5
28.0
21.8
16.8
Hysteresis
DRV Output Source Current
DRV Output Sink Current
V
CC
= 3.1V, V
DRV
= 0V
I
CC
= 1mA, R
DRV
= 475k (Note 3)
–50
0
30
50
nA
pA
Allowable ADJ Leakage Current in
Floating State
l
l
The
l
denotes the specifications which apply over the full operating
junction temperature range. V
NTC
= V
CC
, 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)
CONDITIONS
V
CC
Rising
l
MIN
15
TYP
40
100
MAX
60
UNITS
mV
mV
High Battery Status
Low Battery Status
V
CC
Falling
l
3.08
220
3.2
290
3.34
350
0.5
V
mV
V
V
Status Outputs HBO/LBO
V
CC
– 0.6
3-State Selection Input: ADJ
V
ADJ
ADJ Input Level
l
l
l
0.3
V
CC
– 0.3
±3
V
V
μA
–50
–75
–100
36.5
29.0
22.8
17.8
30
–1
3
37.5
30.0
23.8
18.8
mV
mV
mV
%
%
%
%
mV
mA
μA
NTC
TH1
NTC
TH2
NTC
TH3
NTC
TH4
NTC
HY
Drive Output
I
DRV(SOURCE)
I
DRV(SINK)
NTC Comparator Falling Thresholds
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 LTC4070E is guaranteed to meet performance specifications
for junction temperatures from 0°C to 85°C. Specifications over the –40°C
to 85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC4070I is guaranteed over the full –40°C to 125°C operating junction
temperature range. Note that the maximum ambient temperature is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
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