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参数资料
| 型号： | MAX8664EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/26页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX8664 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输入电压： | 4.5 ~ 28 V |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX8664 |
Low-Cost, Dual-Output, Step-Down
Controller with Fast Transient Response
Input Capacitor
The input filter capacitors reduce peak currents drawn
from the power source and reduce noise and voltage
ripple on the input caused by the circuit’s switching.
The input capacitors must meet the ripple current
requirement (I RMS ) imposed by the switching currents.
The ripple current requirement can be estimated by the
following equation:
way that the high-side MOSFET’s drain is close and
near the low-side MOSFET’s source. This allows the
input ceramic decoupling capacitor to be placed
directly across and as close as possible to the
high-MOSFET’s drain and the low-side MOSFET’s
source. This helps contain the high switching cur-
rent within this small loop.
3) Pour an analog ground plane in the second layer
I RMS =
1
V IN
( I OUT 1 ) 2 × V OUT 1 × ( V IN ? V OUT 1 ) + ( I OUT 2 ) 2 × V OUT 2 × ( V IN ? V OUT 2 )
underneath the IC to minimize noise coupling.
4) Connect input, output, and VL capacitors to the
Choose a capacitor that exhibits less than 10°C tem-
perature rise at the maximum operating RMS current for
optimum long-term reliability.
Applications Information
PCB Layout Guidelines
Careful PCB layout is an important factor in achieving
low switching losses and clean, stable operation. The
switching power stage requires particular attention.
Follow these guidelines for good PCB layout:
1) A multilayer PCB is recommended.
2) Place IC decoupling capacitors as close as possi-
ble to the IC pins. Keep separate power ground
and signal ground planes. Place the low-side
MOSFETs near the PGND pin. Arrange the high-
side MOSFETs and low-side MOSFETs in such a
power ground plane; connect all other capacitors to
the signal ground plane.
5) Place the MOSFETs as close as possible to the IC
to minimize trace inductance of the gate drive loop.
If parallel MOSFETs are used, keep the trace
lengths to both gates equal and short.
6) Connect the drain leads of the power MOSFET to a
large copper area to help cool the device. Refer to
the power MOSFET data sheet for recommended
copper area.
7) Place the feedback network components as close
as possible to the IC pins.
8) The current-limit setting RC should be Kelvin con-
nected to the high-side MOSFETs’ drain.
Refer to the MAX8664 evaluation kit for an example layout.
24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8664EVKIT+ | 功能描述:电源管理IC开发工具 MAX8664 Evan Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX8667ETEAA+ | 功能描述:直流/直流开关转换器 1.5MHz Dl Step-Down DC/DC Converter 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 |
| MAX8667ETEAA+T | 功能描述:直流/直流开关转换器 1.5MHz Dl Step-Down DC/DC Converter 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 |
| MAX8667ETEAB+ | 功能描述:直流/直流开关转换器 1.5MHz Dl Step-Down DC/DC Converter 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 |
| MAX8667ETEAB+T | 功能描述:直流/直流开关转换器 1.5MHz Dl Step-Down DC/DC Converter 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 |
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