- 您现在的位置：买卖IC网 > PDF目录14220 > AP1509-50SG-U (Diodes Inc)IC REG BUCK 5V 2A 8SOIC PDF资料下载
参数资料
| 型号： | AP1509-50SG-U |
| 厂商： | Diodes Inc |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V 2A 8SOIC |
| 标准包装： | 100 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 4.5 V ~ 22 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 150kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-SOP |
AP1509
150KHz, 2A PWM BUCK DC/DC CONVERTER
Functions Description
Pin Functions
+V IN
This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be
presented at this pin to minimize voltage transients and to supply the switching currents needed by the
regulator.
Ground
Circuit ground.
Output
Internal switch. The voltage at this pin switches between (+V IN – V SAT ) and approximately – 0.5V, with a duty
cycle of approximately V OUT / V IN . To minimize coupling to sensitive circuitry, the PC board copper area
connected to this pin should be minimized.
Feedback
Senses the regulated output voltage to complete the feedback loop.
SD
Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input
supply current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns
the regulator on, and pulling this pin above 1.3V (up to a maximum of 18V) shuts the regulator down. If this
shutdown feature is not needed, the SD pin can be wired to the ground pin.
Thermal Considerations
The SOP-8L package needs a heat sink under most conditions. The size of the heat sink depends on the input
voltage, the output voltage, the load current and the ambient temperature. The AP1509 junction temperature
rises above ambient temperature for a 2A load and different input and output voltages. The data for these
curves was taken with the AP1509 (SOP-8L package) operating as a buck-switching regulator in an ambient
temperature of 25 o C (still air). These temperature increments are all approximate and are affected by many
factors. Higher ambient temperatures require more heat sinker.
For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper
should be used in the board layout (One exception is the output (switch) pin, which should not have large areas
of copper). Large areas of copper provide the best transfer of heat (lower thermal resistance) to the surrounding
air, and moving air lowers the thermal resistance even further.
Package thermal resistance and junction temperature increments are all approximate. The increments are
affected by a lot of factors. Some of these factors include board size, shape, thickness, position, location, and
even board temperature. Other factors are, trace width, total printed circuit copper area, copper thickness,
single or double-sided, multi-layer board and the amount of solder on the board.
The effectiveness of the PC board to dissipate heat also depends on the size, quantity and spacing of other
components on the board, as well as whether the surrounding air is still or moving. Furthermore, some of these
components such as the catch diode will add heat to the PC board and the heat can vary as the input voltage
changes. For the inductor, depending on the physical size, type of core material and the DC resistance, it could
either act as a heat sink taking heat away from the board, or it could add heat to the board.
AP1509
Document number: DS31016 Rev. 4 - 2
10 of 13
June 2010
? Diodes Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| HSC13DREH-S13 | CONN EDGECARD 26POS .100 EXTEND |
| GBC44DRTN-S13 | CONN EDGECARD 88POS .100 EXTEND |
| GBC44DRTH-S13 | CONN EDGECARD 88POS .100 EXTEND |
| ECC30DREN-S13 | CONN EDGECARD 60POS .100 EXTEND |
| ECC30DREH-S13 | CONN EDGECARD 60POS .100 EXTEND |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AP1509-50SL | 制造商:ANACHIP 制造商全称:Anachip Corp 功能描述:150KHz, 2A PWM Buck DC/DC Converter |
| AP1509-50SL-13 | 功能描述:直流/直流开关转换器 150KHZ 2.0A 1.4V 22V 5.0V RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| AP1509-50SLA | 制造商:ANACHIP 制造商全称:Anachip Corp 功能描述:150KHz, 2A PWM Buck DC/DC Converter |
| AP1509-50SL-U | 功能描述:直流/直流开关转换器 150KHZ 2.0A 1.4V 22V 5.0V RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| AP1509-5V | 制造商:ANACHIP 制造商全称:Anachip Corp 功能描述:150KHz, 2A PWM Buck DC/DC Converter |
发布紧急采购，3分钟左右您将得到回复。