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MAXREFDES1048: Two-Layer Board, 3.3V/3A, Wide-Input, Synchronous, Step-Down DC-DC Converter Using the MAX17504

MAXREFDES1048

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 MAX17504 high-efficiency, high-voltage, synchronously rectified step-down converter with dual integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 3.5A and generates output voltage from 0.9V to 90% VIN. Built-in compensation across the output voltage range eliminates the need for external components. The feedback (FB) regulation is accurate to within ±1.1% over -40°C to +125°C. The devices are available in a compact (5mm x 5mm) TQFN lead (Pb)- free package with an exposed pad. Simulation models are available. The MAX17504 features a peak-current-mode control architecture with a MODE feature that can be used to operate the device in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous mode (DCM) control schemes.

PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and skips pulses at light loads for high efficiency, allowing the DCM to feature constant frequency operation down to lighter loads than PFM mode. A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/ undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. An open-drain RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.

特征

  • Eliminates External Components and Reduces Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation
  • Operates Reliably

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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

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 18 36 3 - 3.3 9.9 Non-Isolated Synchronous Buck

参数化

输入类型 DC
Vin(Min) 18
Vin(Max) 36
Iout(Max) 3
单路/多路输出 -
Vout(V) 3.3
Pout(W) 9.9
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
MAX17504 4.5V–60V、3.5A、高效率、同步降压DC-DC转换器,带内部补偿 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
4.5V–60V、3.5A、高效率、同步降压DC-DC转换器,带内部补偿

设计资料 (4)

标题 类型 尺寸 日期
maxrefdes1048-test-results PDF 558KB 2019-07-09
maxrefdes1048-pcb PDF 1MB 2019-07-09
maxrefdes1048-bom PDF 202KB 2019-07-09
maxrefdes1048-schematic PDF 14KB 2019-07-09
日期 类型
2019-07-09

maxrefdes1048-test-results

(PDF, 558KB)

2019-07-09

maxrefdes1048-pcb

(PDF, 1MB)

2019-07-09

maxrefdes1048-bom

(PDF, 202KB)

2019-07-09

maxrefdes1048-schematic

(PDF, 14KB)

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