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| 型号： | TPS54620RGYR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 11 A SWITCHING REGULATOR, 1760 kHz SWITCHING FREQ-MAX, PQCC14 |
| 封装： | 3.50 X 3.50 MM, GREEN, PLASTIC, MO-241BA, VQFN-14 |
| 文件页数： | 22/44页 |
| 文件大小： | 1827K |
| 代理商： | TPS54620RGYR |
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SLVS949C
– MAY 2009 – REVISED MAY 2011
Figure 54. 3.3V Output Power Supply Design (PMP4854-2) with Fast Transients
Figure 55. Closed Loop Response for PMP4854-2
PCB Layout Guidelines
Layout is a critical portion of good power supply design. See Figure 56 for a PCB layout example. The top layer
contains the main power traces for VIN, VOUT, and VPHASE. Also on the top layer are connections for the
remaining pins of the TPS54620 and a large top side area filled with ground. The top layer ground area should
be connected to the internal ground layer(s) using vias at the input bypass capacitor, the output filter capacitor
and directly under the TPS54620 device to provide a thermal path from the exposed thermal pad land to ground.
The GND pin should be tied directly to the power pad under the IC and the power pad. For operation at full rated
load, the top side ground area together with the internal ground plane, must provide adequate heat dissipating
area. There are several signals paths that conduct fast changing currents or voltages that can interact with stray
inductance or parasitic capacitance to generate noise or degrade the power supplies performance. To help
eliminate these problems, the PVIN pin should be bypassed to ground with a low ESR ceramic bypass capacitor
with X5R or X7R dielectric. Care should be taken to minimize the loop area formed by the bypass capacitor
connections, the PVIN pins, and the ground connections. The VIN pin must also be bypassed to ground using a
low ESR ceramic capacitor with X5R or X7R dielectric. Make sure to connect this capacitor to the quite analog
ground trace rather than the power ground trace of the PVIn bypass capacitor. Since the PH connection is the
switching node, the output inductor should be located close to the PH pins, and the area of the PCB conductor
minimized to prevent excessive capacitive coupling. The output filter capacitor ground should use the same
power ground trace as the PVIN input bypass capacitor. Try to minimize this conductor length while maintaining
Copyright
2009–2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
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| TPS54620RGYT | 功能描述:直流/直流开关调节器 4.5-17Vin 6A Synch St Down SWIFT Cnvtr 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 |
| TPS54620RGYT-P | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| TPS54620RHLR | 功能描述:直流/直流开关转换器 4.5-17Vin,6A Syn Step Down Cnvrtr 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 |
| TPS54620RHLT | 功能描述:直流/直流开关转换器 4.5-17Vin,6A Syn Step Down Cnvrtr 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 |
| TPS54622 | 制造商:TI 制造商全称:Texas Instruments 功能描述:4.5V to 17V Input, 6A Synchronous Step Down SWIFT? Converter With Hiccup |
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