参数资料
| 型号： | LT3493IDCB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/20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
High Temperature Considerations
The die temperature of the LT3493 must be lower than the
maximum rating of 125°C. This is generally not a concern
unless the ambient temperature is above 85°C. For higher
temperatures, care should be taken in the layout of the
circuit to ensure good heat sinking of the LT3493. The
maximum load current should be derated as the ambient
temperature approaches 125°C. The die temperature is
calculated by multiplying the LT3493 power dissipation by
the thermal resistance from junction to ambient. Power
dissipation within the LT3493 can be estimated by calcu-
lating the total power loss from an ef?ciency measure-
ment and subtracting the catch diode loss. The resulting
temperature rise at full load is nearly independent of input
voltage. Thermal resistance depends on the layout of the
circuit board, but 64°C/W is typical for the (2mm × 3mm)
DFN (DCB) package.
Outputs Greater Than 6V
For outputs greater than 6V, add a resistor of 1k to 2.5k
across the inductor to damp the discontinuous ringing
of the SW node, preventing unintended SW current. The
12V Step-Down Converter circuit in the Typical Applica-
tions section shows the location of this resistor. Also note
that for outputs above 6V, the input voltage range will be
limited by the maximum rating of the BOOST pin. The 12V
circuit shows how to overcome this limitation using an
additional zener diode.
Other Linear Technology Publications
Application notes AN19, AN35 and AN44 contain more
detailed descriptions and design information for Buck
regulators and other switching regulators. The LT1376
data sheet has a more extensive discussion of output
ripple, loop compensation and stability testing. Design
Note DN100 shows how to generate a bipolar output
supply using a Buck regulator.
TYPICAL APPLICATIONS
0.78V Step-Down Converter
1N4148
V IN
3.6V TO 25V
V IN
BOOST
ON OFF
LT3493
SHDN
SW
0.1μF 3.3μH
V OUT
0.78V
MBRM140
1.2A
GND
FB
47μF
2.2μF
3493 TA02
1.8V Step-Down Converter
1N4148
V IN
3.6V TO 25V
V IN
BOOST
ON OFF
LT3493
SHDN
SW
0.1μF
5μH
V OUT
1.8V
MBRM140
26.1k
1.2A
2.2μF
GND
FB
20k
22μF
3493 TA03
3493fb
17
相关PDF资料 |
PDF描述 |
|---|---|
| LT3494EDDB#TRPBF | IC REG BOOST ADJ 0.18A 8DFN |
| LT3495EDDB-1#TRMPBF | IC REG BOOST ADJ 0.35A 10DFN |
| LT3501IFE#TRPBF | IC REG BUCK ADJ 3A DL 20TSSOP |
| LT3502IMS#TRPBF | IC REG BUCK ADJ 0.5A 10MSOP |
| LT3503EDCB#TRPBF | IC REG BUCK ADJ 1A 6DFN |
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 |
发布紧急采购，3分钟左右您将得到回复。