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参数资料
| 型号： | LTC3547EDDB-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 .3A 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 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 300mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°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（3x2） |
LTC3547
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V CC = 3.6V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R DS(ON)
Channel 1 (Note 4)
Top Switch On-Resistance
Bottom Switch On-Resistance
V IN = 3.6V, I SW = 100mA
V IN = 3.6V, I SW = 100mA
0.8
0.75
1.05
1.05
Ω
Ω
Channel 2 (Note 4)
Top Switch On-Resistance
Bottom Switch On-Resistance
V IN = 3.6V, I SW = 100mA
V IN = 3.6V, I SW = 100mA
0.8
0.75
1.05
1.05
Ω
Ω
I SW(LKG)
Switch Leakage Current
V IN = 5V, V RUN = 0V
0.01
1
μA
t SOFTSTART
V RUN
I RUN
V BURST
Soft-Start Time
RUN Threshold High
RUN Leakage Current
Output Ripple in Burst Mode Operation
V FB From 10% to 90% Full-Scale
V OUT = 1.5V, C OUT = 4.7μF
●
●
0.450
0.4
0.650
1
0.01
20
0.850
1.2
1
ms
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: The LTC3547E is guaranteed to meet speci?ed performance
from 0°C to 85°C. Speci?cations over the –40°C and 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
Note 5: Guaranteed by long term current density limitations.
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 3: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
TYPICAL PERFOR A CE CHARACTERISTICS
Burst Mode Operation
Ef?ciency vs Input Voltage
Supply Current vs Temperature
SW, AC
COUPLED
5V/DIV
V OUT
50mV/DIV
100
90
80
70
V OUT = 1.8V
60
55
50
45
RUN1 = RUN2 = V IN
I LOAD = 0A
V IN = 5.5V
40
I L
50mA/DIV
60
35
V IN = 3.6V
V OUT = 1.8V
I LOAD = 20mA
2.5 μ s/DIV
3547 G01
50
40
30
2.5
I OUT = 0.1mA
I OUT = 1mA
I OUT = 10mA
I OUT = 100mA
I OUT = 300mA
3 3.5
4
4.5
5
5.5
30
25
20
–50
–25
V IN = 2.7V
0 25
50
75
100
V IN (V)
3547 G02
TEMPERATURE (oC)
3547 G03
3547fa
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3548 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous,400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
| LTC3548-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, Fixed Output 2.25MHz Step-Down DC/DC Regulator |
| LTC3548-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, Fixed/Adjustable Output, 2.25MHz Step-Down DC/DC Regulator |
| LTC3548A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
| LTC3548AEDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
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