LTC3406AE 查看數據表（PDF） - Linear Technology
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LTC3406AE Datasheet PDF : 16 Pages
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LTC3406A
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.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RNFET
ILSW
tSOFT-START
VRUN
IRUN
RDS(ON) of N-Channel FET
SW Leakage
Soft-Start Time
RUN Threshold
RUN Leakage Current
ISW = –100mA
0.21 0.35
Ω
VRUN = 0V, VSW = 0V or 5V, VIN = 5V
±0.01 ±1
μA
VFB from 10% to 90% Full-Scale
0.6
0.9
1.2
ms
● 0.3
1
1.5
V
●
±0.01 ±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 LTC3406AE 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. The LTC3406AI is guaranteed to meet the
specified performance over the full –40°C to 125°C operating temperature
range.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
LTC3406A: TJ = TA + (PD)(250°C/W)
Note 4: The LTC3406A is tested in a proprietary test mode that connects
VFB to the output of the error amplifier.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: 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.
Note 7: Limited by long term current density considerations.
TYPICAL PERFORMANCE CHARACTERISTICS
(From Front Page Figure Except for the Resistive Divider Resistor Values)
Efficiency vs Input Voltage
100
90
80
70
60
50
40
30
20
IL = 10mA
10
IL = 100mA
VOUT = 1.8V
IL = 600mA
0
2
3
4
5
6
INPUT VOLTAGE (V)
3406A G01
Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
VIN = 2.7V
10
VIN = 3.6V
VOUT = 1.2V
0
VIN = 4.2V
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
3406A G02
Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
VIN = 2.7V
10
VIN = 3.6V
0 VOUT = 2.5V
VIN = 4.2V
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
3406A G03
3406afa
3
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