LTC4080EMSE View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC4080EMSE Datasheet PDF : 20 Pages
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LTC4080
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at TA = 25°C, VCC = 5V, VBAT = 3.8V, V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 0V, VEN_BUCK = VBAT, VMODE = 0V. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RON_P
RON_N
ILIM_P
ILIM_N
IZERO_CF
IPEAK
IZERO_BM
tSS_BUCK
PMOS Switch On-Resistance
NMOS Switch On-Resistance
PMOS Switch Current Limit
NMOS Switch Current Limit
NMOS Zero Current in Normal Mode
Peak Current in Burst Mode Operation
Zero Current in Burst Mode Operation
Buck Soft-Start Time
MODE = VBAT
MODE = VBAT
From the Rising Edge of EN_BUCK to 90%
of Buck Regulated Output
0.95
Ω
0.85
Ω
375
520
700
mA
700
mA
15
mA
50
100
150
mA
20
35
50
mA
400
μs
Logic
VIH
VIL
VOL
IIH
IIL
R⎯E⎯N⎯_⎯C⎯H⎯R⎯G
I⎯C⎯H⎯R⎯G
I⎯A⎯C⎯P⎯R
Input High Voltage
⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK, MODE Pin Low to High ●
1.2
V
Input Low Voltage
E⎯ ⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK, MODE Pin High to Low ● 0.4
V
Output Low Voltage (⎯C⎯H⎯R⎯G, ⎯A⎯C⎯P⎯R)
ISINK = 5mA
●
60
105
mV
Input Current High
Input Current Low
EN_BUCK, MODE Pins at 5.5V, VBAT = 5V
⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK, MODE Pins at GND
● –1
● –1
1
μA
1
μA
⎯E⎯N⎯_⎯C⎯H⎯R⎯G Pin Input Resistance
⎯C⎯H⎯R⎯G Pin Leakage Current
⎯A⎯C⎯P⎯R Pin Leakage Current
V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V
VBAT = 4.5V, V⎯C⎯H⎯R⎯G = 5V
VCC = 3V, V⎯C⎯H⎯R⎯G = 5V
1
1.7
3.3
MΩ
●
1
μA
●
1
μA
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 LTC4080 is guaranteed to meet performance specifications
from 0°C to 85°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 solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
43°C/W.
Note 4: Although the LTC4080 charger functions properly at 3.75V, full
charge current requires an input voltage greater than the desired final
battery voltage per ΔVUVCL1 specification.
Note 5: The 2.8V maximum buck undervoltage lockout (VUVLO_BUCK) exit
threshold must first be exceeded before the minimum VBAT specification
applies.
Note 6: IC/10 is expressed as a fraction of measured full charge current
with indicated PROG resistor.
4080fb
4
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