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MAXREFDES1269: 5V/20A, Synchronous Step-Down Converter Using the MAX20098

MAXREFDES1269

参考设计免责声明 参照  重要声明和免责声明  涵盖参考设计和其他Maxim资源

描述

The MAXREFDES1269 demonstrates how to build a DC-DC buck converter using the MAX20098 step-down controller for 5V DC output applications from a 6V to 36V input. This reference design delivers up to 20A at 5V output. The design uses a six-layer board. Table above shows an overview of the design specification.

The MAX20098 is a 3.5V to 36V synchronous, step-down DC-DC controller. It uses a current-mode control architecture and can operate in the pulse-width modulation (PWM) or skip-mode control schemes. The device can operate in dropout conditions at a 99% duty cycle. The external sync pin (FSYNC) logic input, under light-load applications, allows the device to operate either in the skip-mode or fixed-frequency forced-PWM (FPWM) mode to minimize electromagnetic interference (EMI). The output voltage is programmable from 1V to 10V with fixed 3.3V/5V options. The feedback (FB) regulation is accurate within ±1% over -40°C to +125°C.

特征

  • Efficiency = 88% at Full Load
  • Output-Voltage Ripple < 50mV across Line and Load Conditions
  • Overshoot < 150mV for 50% Load Step
  • Continuous Conduction Mode (CCM) Operation
  • Internal Soft-Start
  • Overall Solution Size = 572mm2

Icon

设计, 制作, 测试

图中的电路板已经完成封装和测试。不可售。

 

示意图

PCB布局

物料清单(BOM)

试验结果

参数化

输入类型 Vin(Min) Vin(Max) Iout(Max) 单路/多路输出 Vout(V) Pout(W) 隔离/非隔离 拓扑
DC 6 36 20 - 5 100 Non-Isolated Synchronous Buck

参数化

输入类型 DC
Vin(Min) 6
Vin(Max) 36
Iout(Max) 20
单路/多路输出 -
Vout(V) 5
Pout(W) 100
隔离/非隔离 Non-Isolated
拓扑 Synchronous Buck

Maxim设备 (1)

器件号 名称 产品线 购买 设计套件和评估模块
MAX20098 通用36V 2.2MHz Buck控制器,具有3.5µA IQ 开关稳压器 立即购买 Design Kits

Maxim设备 (1)

器件号 产品线
开关稳压器
通用36V 2.2MHz Buck控制器,具有3.5µA IQ

设计资料 (5)

标题 类型 尺寸 日期
maxrefdes1269-schematic PDF 16KB 2020-09-15
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 665KB 2020-09-15
maxrefdes1269-bom CSV 4KB 2020-09-15
maxrefdes1269-pcb PDF 1MB 2020-09-15
maxrefdes1269-bom XLSX 13KB 2020-09-15
日期 类型
2020-09-15

maxrefdes1269-schematic

(PDF, 16KB)

2020-09-15

TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 665KB)

2020-09-15

maxrefdes1269-bom

(CSV, 4KB)

2020-09-15

maxrefdes1269-pcb

(PDF, 1MB)

2020-09-15

maxrefdes1269-bom

(XLSX, 13KB)

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