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LTC4062 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4062
Description  Standalone Linear Li-Ion Battery Charger with Micropower Comparator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4062 Datasheet(HTML) 3 Page - Linear Technology

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LTC4062
3
4062fb
ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted.
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 LTC4062 is guaranteed to meet performance specifications
from 0
°C to 70°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: Failure to correctly solder the exposed pad of the package to the
PC board will result in a thermal resistance much higher than 40
°C/W.
Note 4: Supply current includes PROG pin current and IDET pin current
(approximately 100
µA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions.
Overtemperature protection will become active at a junction temperature
greater than the maximum operating temperature. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VEN
EN Input Threshold Voltage
EN Rising, 4.3V < VCC < 8V
0.4
0.7
1
V
Hysteresis
70
mV
VCT
Charge Termination Mode Threshold
VTIMER from High to Low
0.4
0.7
1
V
Voltage
Hysteresis
50
mV
VUT
User Termination Mode Threshold
VTIMER from Low to High
3.9
4.2
V
Voltage
Hysteresis
50
mV
IDETECT
Charge Current Detection Threshold
RDET = 1k, 0 ≤ TA ≤ 85°C
90
100
110
mA
RDET = 2k, 0 ≤ TA ≤ 85°C45
50
55
mA
RDET = 10k, 0 ≤ TA ≤ 85°C8
10
12
mA
RDET = 20k, 0 ≤ TA ≤ 85°C
3.8
5
6.2
mA
∆VRECHRG
Recharge Threshold Voltage
VFLOAT – VRECHRG, 0 ≤ TA ≤ 85°C
65
100
135
mV
tSS
Soft-Start Time
IBAT from 0 to ICHG
100
µs
tTERM
Termination Comparator Filter Time
Current Termination Mode
0.8
1.5
2.5
ms
tRECHRG
Recharge Comparator Filter Time
3
7
14
ms
tTIMER
Charge Cycle Time
CTIMER = 0.1µF
2.55
3
3.45
hr
RC/5
C/5 Pin Pull-Down Resistor
2
3.4
5
M
VC/5
C/5 Input Threshold Voltage
C/5 Rising, 4.3V < VCC < 8V
0.4
0.7
1
V
Hysteresis
70
mV
TLIM
Junction Temperature in Constant
105
°C
Temperature Mode
RON
Power FET “ON” Resistance
VBAT = 3.85V, ICC = 175mA, RPROG = 2k
375
m
(Between VCC and BAT)
Comparator
VIN+
IN+ Pin Threshold Voltage
VIN+ Falling
0.988
1
1.012
V
Hysteresis
50
mV
VBAT-MIN
Minimum VBAT Supply Voltage for the VCC = 0V, VBAT Falling
2.4
2.5
2.6
V
Low Power Comparator
Hysteresis
100
mV
IBAT
Supply Current for the Low Power
VCC = 0V, VBAT = 2.5V
7
9
13
µA
Comparator


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