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參數(shù)資料
| 型號(hào)： | LTC3419EMS#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.2 A DUAL SWITCHING CONTROLLER, 2250 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大?。?/td> | 264K |
| 代理商： | LTC3419EMS#TR |
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LTC3419
3
3419f
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: Guaranteed by long term current density limitations.
Note 3: The LTC3419E and LTC3419E-1 are guaranteed to meet specied
performance from 0°C to 85°C. Specications over the –40°C and 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ΔVLOAD REG
Output Voltage Load Regulation
ILOAD = 0mA to 600mA (Note 7)
0.5
%
IS
Input DC Supply Current
Active Mode (Note 4)
Sleep Mode
Shutdown
VFB1 = VFB2 = 0.95 × VFBREG
VFB1 = VFB2 = 1.05 × VFBREG, VIN = 5.5V
RUN1 = RUN2 = 0V, VIN = 5.5V
500
35
0.1
700
60
1
μA
fOSC
Oscillator Frequency
VFB = VFBREG
●
1.8
2.25
2.7
MHz
ILIM
Peak Switch Current Limit
Channel 1 (600mA)
Channel 2 (600mA)
VIN = 3V, VFB < VFBREG, Duty Cycle < 35%
900
1200
mA
RDS(ON)
Channel 1 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Channel 2 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
VIN = 3.6V, ISW = 100mA
0.4
0.6
Ω
ISW(LKG)
Switch Leakage Current
VIN = 5V, VRUN = 0V
0.01
1
μA
tSOFTSTART
Soft-Start Time
VFB from 10% to 90% Full Scale
0.1
0.95
1.3
ms
VRUN
RUN Threshold High
●
0.4
1
1.2
V
IRUN
RUN Leakage Current
●
0.01
1
μA
VMODE
MODE Threshold High
●
0.4
1
1.2
V
IMODE
MODE Leakage Current
●
0.01
1
μA
VBURST
Output Ripple in Burst Mode Operation
VOUT = 1.5V, COUT = 10μF
20
mVP-P
ELECTRICAL CHARACTERISTICS The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C, VIN = 3.6V, unless otherwise noted.
Note 5: The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
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 specied maximum operating junction
temperature may impair device reliability.
Note 7: The converter is tested in a proprietary test mode that connects
the output of the error amplier to the SW pin, which is connected to an
external servo loop.
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