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LTC4070EMS8ETRPBF Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4070EMS8ETRPBF
Description  Li-Ion/Polymer Shunt Battery Charger System
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4070EMS8ETRPBF Datasheet(HTML) 3 Page - Linear Technology

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LTC4070
3
4070f
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 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
factors.
The
l denotes the specifications which apply over the full operating
junction temperature range. VNTC = VCC, TJ = 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)
Note 3: The IDRV(SNK) current is tested by pulling the DRV pin up to VCC
through a 475k resistor, RDRV. Pulling the DRV pin up to VCC with low
impedance disables the regulator.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
High Battery Status
VHBTH
HBO Threshold (VFLOAT – VCC)VCC Rising
l
15
40
60
mV
VHBHY
Hysteresis
100
mV
Low Battery Status
VLBTH
LBO Threshold
VCC Falling
l
3.08
3.2
3.34
V
VLBHY
Hysteresis
220
290
350
mV
Status Outputs HBO/LBO
VOL
CMOS Output Low
ISINK = 1mA, VCC = 3.7V
l
0.5
V
VOH
CMOS Output High
VLBO: VCC = 3.1V, ISOURCE = –100μA
VHBO: ICC = 1.5mA, ISOURCE = –500μA
l
VCC – 0.6
V
3-State Selection Input: ADJ
VADJ
ADJ Input Level
Input Logic Low Level
l
0.3
V
Input Logic High Level
l
VCC – 0.3
V
IADJ(Z)
Allowable ADJ Leakage Current in
Floating State
l
±3
μA
NTC
INTC
NTC Leakage Current
0V< NTC < VCC
–50
0
50
nA
INTCBIAS
Average NTCBIAS Sink Current
Pulsed Duty Cycle < 0.002%
30
pA
ΔVFLOAT(NTC)
Delta Float Voltage per NTC Comparator
Step
ICC = 1mA, NTC Falling Below One of the
NTCTH Thresholds
ADJ = 0V
ADJ = Float
ADJ = VCC
–50
–75
–100
mV
mV
mV
NTCTH1
NTC Comparator Falling Thresholds
VNTC as % of VNTCBIAS Amplitude
35.5
36.5
37.5
%
NTCTH2
28.0
29.0
30.0
%
NTCTH3
21.8
22.8
23.8
%
NTCTH4
16.8
17.8
18.8
%
NTCHY
Hysteresis
30
mV
Drive Output
IDRV(SOURCE)
DRV Output Source Current
VCC = 3.1V, VDRV = 0V
–1
mA
IDRV(SINK)
DRV Output Sink Current
ICC = 1mA, RDRV = 475k (Note 3)
3
μA


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