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参数资料
型号： LTC3419IMS#PBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： 1.2 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10
封装： LEAD FREE, PLASTIC, MSOP-10
文件页数： 10/16页
文件大小： 266K
代理商： LTC3419IMS#PBF
LTC3419
3
3419fa
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 to 125°C
operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3419I and LTC3419I-1 are guaranteed to meet specied performance
over the full –40°C to 125°C operating junction temperature range.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
VIN Operating Voltage
●
2.5
5.5
V
VUV
VIN Undervoltage Lockout
VIN Low to High
●
2.1
2.5
V
IFB
Feedback Pin Input Current
LTC3419
LTC3419-1
●
3
±30
5
nA
μA
VFBREG1
Regulated Feedback Voltage (Channel 1) LTC3419E, 0°C < TJ < 85°C
LTC3419E, –40°C < TJ < 85°C
LTC3419E-1, –40°C < TJ < 85°C
LTC3419I, –40°C < TJ < 125°C
LTC3419I-1, –40°C < TJ < 125°C
●
0.590
0.588
1.544
0.582
1.533
0.600
1.575
0.6
1.575
0.610
0.612
1.606
0.618
1.617
V
VFBREG2
Regulated Feedback Voltage (Channel 2) LTC3419E, 0°C < TJ < 85°C
LTC3419E, –40°C < TJ < 85°C
LTC3419E-1, –40°C < TJ < 85°C
LTC3419I, –40°C < TJ < 125°C
LTC3419I-1, –40°C < TJ < 125°C
●
0.590
0.588
1.764
0.582
1.753
0.600
1.8
0.6
1.8
0.610
0.612
1.836
0.618
1.847
V
ΔVLINE REG
Reference Voltage Line Regulation
VIN = 2.5V to 5.5V (Note 7)
0.3
0.5
%/V
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
junction temperature range, otherwise specications are at TA = 25°C, VIN = 3.6V, unless otherwise noted.
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
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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