参数资料
| 型号： | LT3493IDCB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.2A 6DFN |
| 标准包装： | 500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.78 V ~ 34.2 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 750kHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 6-DFN-EP（2x3） |
LT3493
APPLICATIONS INFORMATION
V SW
10V/DIV
RUN
SHDN
GND
I L
0.5A/DIV
3493 F07a
V OUT
2V/DIV
V SW
V IN = 12V
V OUT = 3.3V
L = 10μH
C OUT = 10μF
20μs/DIV
RUN
15k
SHDN
10V/DIV
0.1μF
GND
3493 F07b
I L
0.5A/DIV
V OUT
2V/DIV
V IN = 12V
20μs/DIV
V OUT = 3.3V
L = 10μH
C OUT = 10μF
Figure 7. To Soft-Start the LT3493, Add a Resistor and Capacitor to the SHDN Pin. V IN = 12V, V OUT = 3.3V, C OUT = 10μF, R LOAD = 5Ω
D4
a complete discussion). The low loss ceramic capacitor
V IN
V IN
BOOST
LT3493
combined with stray inductance in series with the power
source forms an underdamped tank circuit, and the voltage
SHDN
GND
SW
FB
V OUT
at the V IN pin of the LT3493 can ring to twice the nominal
input voltage, possibly exceeding the LT3493’s rating and
damaging the part. If the input supply is poorly controlled
BACKUP
or the user will be plugging the LT3493 into an energized
supply, the input network should be designed to prevent
D4: MBR0540
3493 F08
this overshoot.
Figure 8. Diode D4 Prevents a Shorted Input from Discharging
a Backup Battery Tied to the Output; It Also Protects the Circuit
from a Reversed Input. The LT3493 Runs Only When the Input
is Present
Figure 9 shows the waveforms that result when an LT3493
circuit is connected to a 24V supply through six feet of
24-gauge twisted pair. The ?rst plot is the response with
3493fb
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3493IDCB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| LT3494 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Noise Boost Converters with Output Disconnect |
| LT3494A | 制造商:LINER 制造商全称:Linear Technology 功能描述:20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN |
| LT3494AEDDB | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Noise Boost Converters with Output Disconnect |
| LT3494AEDDB#PBF | 制造商:Linear Technology 功能描述:BOOST 2.3 - 16V 0.35A 40V 制造商:Linear Technology 功能描述:BOOST, 2.3 - 16V, 0.35A, 40V, 20QFN |
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