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MAXREFDES1130: Low Output-Voltage Ripple Design for 0.9V/2A and 1.2V/2A Dual Output Step-Down DC-DC Converter with Integrated Switches Using the MAX17509

MAXREFDES1130

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描述

The MAX17509 integrates two internal switch step-down regulators with programmable features. The device can be configured as two single-phase independent power supplies or as a dual-phase, single-output power supply. The device operates from 4.5V to 16V input and generates independently adjustable output voltage in the ranges of 0.904V to 3.782V and 4.756V to 5.048V, with ±2% system accuracy. The MAX17509 provides maximum flexibility to end-users by allowing them to choose multiple programmable options by connecting resistors to the configuration pins. Two key highlights of the device are the self-configured compensation for any output voltage and the ability to program the slew rate of LX switching nodes to mitigate noise concerns. Noise-sensitive applications, such as high-speed multigigabit transceivers in FPGAs, RF, and audio, benefit from this unique slew-rate control. SYNC input is provided for synchronized operation of multiple devices with system clocks.

The MAX17509 offers output overvoltage (OV) and undervoltage (UV) protection, as well as overcurrent (OC) and undercurrent (UC) protection with a selectable hiccup/latch option.

A dual output buck converter using the MAX17509 is demonstrated for a 0.9V and 1.2V output application. The power supply delivers up to 2A at 0.9V and up to 2A at 1.2V.

特征

  • Reduces Number of DC-DC Regulators in Inventory
  • Output Voltage of 0.904V to 3.782V and 4.756V to 5.048V with 20mV Resolution
  • Configurable Two Independent Outputs or a Dual-Phase Single Output
  • Mitigate Noise Concerns and EMI
  • Adjustable Switching Frequency with Selectable 0/180° Phase Shift
  • External Frequency Synchronization
  • Adjustable Switching Slew Rate
  • Passes EN55022 (CISPR22) Class-B Radiated and Conducted EMI Standard
  • Ease of System Design
  • All Ceramic Capacitors Solution
  • Autoconfigured Internal Compensation Selectable Hiccup or Brick-Wall Mode
  • Adjustable Soft-Start Rise/Fall Time with Soft-Stop Modes and Pre-Bias Startup

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 18 36 2 - 0.9 4.2 Non-Isolated -

参数化

输入类型 DC
Vin(Min) 18
Vin(Max) 36
Iout(Max) 2
单路/多路输出 -
Vout(V) 0.9
Pout(W) 4.2
隔离/非隔离 Non-Isolated
拓扑 -

Maxim设备 (1)

器件号 名称 产品线 购买 设计套件和评估模块
MAX17509 4.5V–16V、双路3A输出、高效、同步降压型DC-DC转换器,带电阻编程功能 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–16V、双路3A输出、高效、同步降压型DC-DC转换器,带电阻编程功能

设计资料 (4)

标题 类型 尺寸 日期
maxrefdes1130_bom PDF 78KB 2019-07-09
maxrefdes1130_schematic PDF 100KB 2019-07-09
maxrefdes1130_pcb PDF 2MB 2019-07-09
maxrefdes1130_test_results PDF 98KB 2019-07-09
日期 类型
2019-07-09

maxrefdes1130_bom

(PDF, 78KB)

2019-07-09

maxrefdes1130_schematic

(PDF, 100KB)

2019-07-09

maxrefdes1130_pcb

(PDF, 2MB)

2019-07-09

maxrefdes1130_test_results

(PDF, 98KB)

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