LTC3541-2(RevA) 查看數據表（PDF） - Linear Technology
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LTC3541-2 Datasheet PDF : 20 Pages
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LTC3541-2
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP MAX
IS
Buck + VLDO
LVIN = 1.875V, LVOUT = 1.5V, ENBUCK = VIN,
85
Burst Mode Sleep
ENVLDO = VIN, MODE = 0V, IOUT(VLDO) = 10µA,
VIN Quiescent Current
VVOUT = 2.11V
Buck + VLDO
LVIN = 1.875V, LVOUT = 1.5V, ENBUCK = VIN,
315
Burst Mode Active
ENVLDO = VIN, MODE = 0V, IOUT(VLDO) = 10µA,
VIN Quiescent Current
VVOUT = 1.64V
Buck + VLDO
LVIN = 1.875V, LVOUT = 1.5V, ENBUCK = VIN,
300
Pulse-Skip Mode Active
ENVLDO = VIN, MODE = VIN, IOUT(VLDO) = 10µA,
VIN Quiescent Current
VVOUT = 1.64V
Buck
VVOUT = 2.11V, IOUT(BUCK) = 0A, ENBUCK = VIN,
55
Burst Mode Sleep
ENVLDO = 0V, MODE = 0V
VIN Quiescent Current
Buck
VVOUT = 1.64V, IOUT(BUCK) = 0A, ENBUCK = VIN,
300
Burst Mode Active
ENVLDO = 0V, MODE = 0V
VIN Quiscent Current
Buck
VVOUT = 1.64V, IOUT(BUCK) = 0A, ENBUCK = VIN,
285
Pulse-Skip Mode Active
ENVLDO = 0V, MODE = VIN
VIN Quiescent Current
Linear Regulator VIN Quiescent LVOUT = 1.5V, ENBUCK = 0V, ENVLDO = VIN,
50
Current
IOUT(VLDO) = 10µA
VIN Shutdown Quiescent
ENBUCK = 0V, ENVLDO = 0V
2.5
Current
LVIN Shutdown Quiescent
LVIN = 3.6V, ENBUCK = 0V, ENVLDO = 0V
0.1
Current
fOSC
Oscillator Frequency
l 1.8
2.25
2.7
RPFET
RDS(ON) of P-Channel MOSFET ISW = 100mA
0.25
RNFET
RDS(ON) of N-Channel MOSFET ISW = –100mA
0.35
ILSW
SW Leakage
Enable = 0V, VSW = 0V or 6V, VIN = 6V
±0.01 ±1
VIH
Input Pin High Threshold
MODE, ENBUCK, ENVLDO
l 0.9
VIL
Input Pin Low Threshold
MODE, ENBUCK, ENVLDO
l
0.3
IMODE,
IENBUCK,
IENVLDO
Input Pin Current
l
±0.01 ±1
UNITS
µA
µA
µA
µA
µA
µA
µA
µA
µA
MHz
Ω
Ω
µA
V
V
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 LTC3541-2 is guaranteed to meet performance specifications
from 0°C to 85°C. VLDO/linear regulator output is tested and specified
under pulse load conditions such that TJ ≈ TA, and are 100% production
tested at 25°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: Minimum operating LVIN voltage required for VLDO regulation is:
LVIN ≥ LVOUT + VDROPOUT.
Note 4: Minimum operating VIN voltage required for VLDO and linear
regulator regulation is:
VIN ≥ LVOUT + 1.4V.
Note 5: TJ is calculated from the ambient temperature, TA, and power
dissipation, PD, according to the following formula:
TJ = TA + (PD • 43°C/W)
Note 6: The LTC3541-2 is tested in a proprietary test mode that connects
VBUCKFB to the output of the error amplifier. For the reference regulation
and line regulation tests, the output of the error amplifier is set to the
midpoint. For the load regulation test, the output of the error amplifier is
driven to the minimum and maximum of the signal range.
Note 7: Measurement made in closed loop linear regulator configuration
with LVOUT = 1.5V, ILOAD = 10µA.
Note 8: Measurement made in a proprietary test mode with slope
compensation disabled.
Note 9: Measurement is assured by design, characterization and statistical
process control.
Note 10: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
35412fb
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