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参数资料
| 型号： | IR3871MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 17/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 8A PQFN |
| 产品培训模块： | SupIRBuck? Family and POL Design Tools Overview |
| 标准包装： | 4,000 |
| 系列： | SupIRBuck™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.5 V ~ 12 V |
| 输入电压： | 3 V ~ 26 V |
| 频率 - 开关： | 可调至 1MHz |
| 电流 - 输出： | 8A |
| 同步整流器： | 是 |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 17-PowerVQFN |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | PQFN（5x6） |
| 其它名称： | Q5214926 |
IR3871MPBF
LAYOUT RECOMMENDATION
Bypass Capacitor:
One 1μF high quality ceramic capacitor should be
placed as near VCC pin as possible. The other
end of capacitor can be connected to a via or
V IN
connected directly to GND plane. Use a GND
plane instead of a thin trace to the GND pin
because a thin trace have too much impedance.
Q1
ON
V OUT
Boot Circuit:
C BOOT should be placed near the BOOT and
PHASE pins to reduce the impedance when the
IR3871
Q2
OFF
C OUT
C IN
upper MOSFET turns on.
Power Stage:
Figure 24 shows the current paths and their
directions for the on and off periods. The on time
path has low average DC current and high AC
current. Therefore, it is recommended to place the
Figure 24. Current Path of Power Stage
input
ceramic
capacitor,
upper,
and
lower
MOSFET in a tight loop as shown in Figure 24.
The purpose of the tight loop from the input
ceramic
capacitor
is
to suppress
the
high
frequency (10MHz range) switching noise and
reduce Electromagnetic Interference (EMI). If this
path has high inductance, the circuit will cause
voltage spikes and ringing, and increase the
switching loss. The off time path has low AC and
high average DC current. Therefore, it should be
laid out with a tight loop and wide trace at both
ends of the inductor. Lowering the loop resistance
reduces the power loss. The typical resistance
value of 1-ounce copper thickness is 0.5 mΩ per
square inch.
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3876MBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:12A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR |
| IR3876MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:12A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR |
| IR3876MTR1PBF | 功能描述:直流/直流开关调节器 12A SupIRBuck Reg 1000kHz, 3.0-21V in RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| IR3876MTRPBF | 功能描述:直流/直流开关调节器 12A SupIRBuck Reg 1000kHz, 3.0-21V in RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| IR3876TR1PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:12A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR |
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