Datasheet

LTM8062/LTM8062A
3
8062fd
For more information www.linear.com/LTM8062
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 LTM8062E/LTM8062AE are guaranteed to meet performance
specifications from 0°C to 125°C internal. Specifications over the full
–40°C to 125°C internal operating temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTM8062I/LTM8062AI are guaranteed to meet specifications over
the full –40°C to 125°C internal operating temperature range. Note that
The l denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. RUN = 2V.
the maximum internal temperature is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.
Note 3: This parameter is valid for programmed output battery float
voltages ≤ 4.2V. For other float voltages, V
IN
Start is 3.3V above the
programmed output battery float voltage. This parameter is guaranteed by
design, characterization, and correlation with statistical process controls.
Note 4: The maximum BAT charging current is reduced by thermal
foldback. See the Typical Performance Characteristics for details.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Maximum Operating Voltage 32 V
V
IN
Start Voltage V
BAT
= 4.2V (Note 3) 7.5 V
V
IN
OVLO Threshold V
IN
Rising 32 35 40 V
V
IN
OVLO Hysteresis 1 V
V
IN
UVLO Threshold V
IN
Rising 4.6 4.95 V
V
IN
UVLO Hysteresis 0.3 V
V
INA
to V
IN
Diode Forward Voltage Drop V
INA
Current = 2A 0.55 V
Maximum BAT Float Voltage LTM8062
LTM8062A
14.7
19.3
V
V
Input Supply Current Standby Mode
RUN = 0, V
INREG
= 15V
85
18
µA
µA
Maximum BAT Charging Current (Note 4) 1.8 2.1 A
ADJ Float Reference Voltage
l
3.275
3.25
3.3 3.325
3.34
V
V
ADJ Recharge Threshold Voltage Threshold Relative to ADJ Float Reference 82.5 mV
ADJ Precondition Threshold Voltage ADJ Rising 2.3 V
ADJ Precondition Threshold Hysteresis Voltage Relative to ADJ Precondition Threshold 95 mV
ADJ Input Bias Current Charging Terminated
CV Operation
65
110
nA
nA
V
INREG
Reference Voltage ADJ = 3V, I
BAT
= 1A
l
2.61 2.7 2.83 V
V
INREG
Bias Current V
INREG
= 2.7V 27 µA
NTC Range Limit (High) Voltage V
NTC
Rising 1.25 1.36 1.45 V
NTC Range Limit (Low) Voltage V
NTC
Falling 0.27 0.29 0.315 V
NTC Disable Impedance 250 500 kΩ
NTC Bias Current V
NTC
= 0.8V 45 53 µA
NTC Threshold Hysteresis For Both High and Low Range Limits 20 %
RUN Threshold Voltage V
RUN
Rising 1.15 1.20 1.25 V
RUN Hysteresis Voltage 120 mV
RUN Input Bias Current –10 nA
CHRG, FAULT Output Low Voltage 10mA Load 0.4 V
TMR Charge/Discharge Current 25 µA
TMR Disable Threshold Voltage 0.25 V
Operating Frequency 0.85 1 1.15 MHz