- 您现在的位置：买卖IC网 > PDF目录1825 > LT3495EDDB-1#TRMPBF (Linear Technology)IC REG BOOST ADJ 0.35A 10DFN PDF资料下载
参数资料
| 型号： | LT3495EDDB-1#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.35A 10DFN |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.24 V ~ 40 V |
| 输入电压： | 2.3 V ~ 16 V |
| PWM 型： | 混合物 |
| 频率 - 开关： | 可调至 45kHz |
| 电流 - 输出： | 350mA |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-DFN-EP（3x2） |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
| 其它名称： | LT3495EDDB-1#TRMPBFDKR |
LT3495/LT3495B/
LT3495-1/LT3495B-1
APPLICATIONS INFORMATION
V SHDN
? V SHDN – 1.235 ?
canbesetbythevalueofR CTRL andC CTRL .Thefollowing
expression can be used to design the soft-start time:
? ?
T START ? UP = R CTRL ? C CTRL ? In ? ?
where V SHDN is the voltage at SHDN pin when the part is
enabled. To ensure soft-start will work, the initial voltage
at CTRL pin when the part is enabled should be close to
0V. The soft-start may not work if this initial condition is
not satisfied.
Output Disconnect
The LT3495 series has an output disconnect PMOS that
blocks the load from the input during shutdown. During
normal operation, the maximum current through the PMOS
is limited by circuitry inside the chip. When the CAP and
V OUT voltage difference is more than 8.7V (typ), the cur-
rent through the PMOS is no longer limited, and can be
much higher. As a result, forcing 8.7V or higher voltage
from the CAP to the V OUT pins can damage the PMOS.
In cases when the CAP voltage is high and/or a large ca-
pacitor is used at the CAP pin, shorting V OUT to GND can
cause large PMOS currents to flow. Under this condition,
the PMOS peak current should be kept at less than 1A.
GND
GND
Also be aware of the thermal dissipation in the PMOS at
all times. In addition, if the input voltage is more than 8V,
the PMOS will turn on during shutdown, resulting in the
output voltage no longer being blocked from the input.
Under this condition, the output voltage will be about 8V
lower than the input voltage.
Board Layout Considerations
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
To maximize efficiency, switch rise and fall times are made
as short as possible. To prevent electromagnetic interfer-
ence (EMI) problems, proper layout of the high frequency
switching path is essential. The voltage signal of the
SW pin has sharp rising and falling edges. Minimize the
length and area of all traces connected to the SW pin and
always use a ground plane under the switching regulator
to minimize interplane coupling. In addition, the FB pin
feeds into the internal error amplifier and is sensitive to
noise. Minimizing the length and area of all traces to this
pin is recommended. Connect the feedback resistor R1
directly from the V OUT pin to the FB pin and keep the trace
as short as possible. Recommended component placement
is shown in Figure 6.
SW
CAP
V CC
CTRL
SHDN
GND
CAP
V OUT
FB
GND
3495 F06
CTRL SHDN
VIAS TO GROUND PLANE REQUIRED
TO IMPROVE THERMAL PERFORMANCE
VIAS FOR CAP GROUND RETURN THROUGH
SECOND METAL LAYER, CAPACITOR GROUNDS
MUST BE RETURNED DIRECTLY TO IC GROUND
Figure 6. Recommended Board Layout
3495b1b1fa
12
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| LT3505IMS8E#TRPBF | IC REG BUCK ADJ 1.2A 8MSOP |
| LT3506IDHD#PBF | IC REG BUCK ADJ 1.6A DL 16DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3495EDDB-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect |
| LT3495EDDB-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect |
| LT3495EDDB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect |
| LT3496 | 制造商:LINER 制造商全称:Linear Technology 功能描述:16-Channel 50mA LED |
| LT3496EFE#PBF | 功能描述:IC LED DRVR WT/RGB BCKLT 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
发布紧急采购，3分钟左右您将得到回复。