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| 型号： | LTC3419EDD-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ .6A DL 8DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 600mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-DFN-EP（3x3） |
LTC3419
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
junction temperature range, otherwise speci?cations are at T A = 25°C, V IN = 3.6V, unless otherwise noted.
SYMBOL
V IN
V UV
I FB
PARAMETER
V IN Operating Voltage
V IN Undervoltage Lockout
Feedback Pin Input Current
CONDITIONS
V IN Low to High
LTC3419
LTC3419-1
●
●
●
●
MIN
2.5
TYP
2.1
3
MAX
5.5
2.5
±30
5
UNITS
V
V
nA
μA
V FBREG1
V FBREG2
Δ V LINE REG
Δ V LOAD REG
I S
Regulated Feedback Voltage (Channel 1) LTC3419E, 0°C < T J < 85°C
LTC3419E, –40°C < T J < 85°C
LTC3419E-1, –40°C < T J < 85°C
LTC3419I, –40°C < T J < 125°C
LTC3419I-1, –40°C < T J < 125°C
Regulated Feedback Voltage (Channel 2) LTC3419E, 0°C < T J < 85°C
LTC3419E, –40°C < T J < 85°C
LTC3419E-1, –40°C < T J < 85°C
LTC3419I, –40°C < T J < 125°C
LTC3419I-1, –40°C < T J < 125°C
Reference Voltage Line Regulation
V IN = 2.5V to 5.5V (Note 7)
Output Voltage Load Regulation
I LOAD = 0mA to 600mA (Note 7)
Input DC Supply Current
V FB1 = V FB2 = 0.95 × V FBREG
Active Mode (Note 4)
V FB1 = V FB2 = 1.05 × V FBREG , V IN = 5.5V
Sleep Mode
Shutdown
RUN1 = RUN2 = 0V, V IN = 5.5V
●
●
●
●
●
●
●
●
0.590
0.588
1.544
0.582
1.533
0.590
0.588
1.764
0.582
1.753
0.600
0.600
1.575
0.6
1.575
0.600
0.600
1.8
0.6
1.8
0.3
0.5
500
35
0.1
0.610
0.612
1.606
0.618
1.617
0.610
0.612
1.836
0.618
1.847
0.5
700
60
1
V
V
V
V
V
V
V
V
V
V
%/V
%
μA
μA
μA
f OSC
Oscillator Frequency
V FB = V FBREG
●
1.8
2.25
2.7
MHz
I LIM
Peak Switch Current Limit
V IN = 3V, V FB < V FBREG , Duty Cycle < 35%
Channel 1 (600mA)
Channel 2 (600mA)
900
900
1200
1200
mA
mA
R DS(ON)
I SW(LKG)
Channel 1 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Channel 2 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
V IN = 3.6V, I SW = 100mA
V IN = 3.6V, I SW = 100mA
V IN = 3.6V, I SW = 100mA
V IN = 3.6V, I SW = 100mA
V IN = 5V, V RUN = 0V
0.4
0.4
0.4
0.4
0.01
0.6
0.6
0.6
0.6
1
Ω
Ω
Ω
Ω
μA
t SOFTSTART
V RUN
I RUN
V MODE
I MODE
V BURST
Soft-Start Time
RUN Threshold High
RUN Leakage Current
MODE Threshold High
MODE Leakage Current
Output Ripple in Burst Mode Operation
V FB from 10% to 90% Full Scale
V OUT = 1.5V, C OUT = 10μF
●
●
●
●
0.1
0.4
0.4
0.95
1
0.01
1
0.01
20
1.3
1.2
1
1.2
1
ms
V
μA
V
μA
mV P-P
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 speci?ed
performance from 0°C to 85°C. Speci?cations 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 speci?ed performance
over the full –40°C to 125°C operating junction temperature range.
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 speci?ed 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 ampli?er to the SW pin, which is connected to an
external servo loop.
3419fa
3
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