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-15V/1.5A Buck-Boost DC-DC Converter Using the Step-Down Controller MAX17504

MAXREFDES1161

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描述

The MAXREFDES1050 is a positive input, negative output power supply that delivers up to 1.5A at -15V from a 18V to 30V supply voltage. It is designed for industrial control equipment that uses analog components like amplifiers and multiplexers that operate on negative supply voltage. Typically operating at ±12V, ±18V or other variations, these voltages are generated from a 24V DC bus. The MAXREFDES1050 illustrates techniques using the synchronous buck regulators to generate negative voltages. This document explains how the MAX17504 synchronous step-down converter can be used to generate -15V from 18V to 30V input voltage. An overview of the design specification is shown in Table 1. The MAX17504/MAX17504S high-efficiency, highvoltage, synchronously rectified step-down converter with dual integrated MOSFETs operates over a 4.5V to 60V input. Maxim’s portfolio of high-voltage synchronous buck regulators offers 50% lower power loss, which allows equipment to operate 50% cooler. The device features a peak-current-mode control architecture with a MODE feature that can be used to operate the device in pulsewidth modulation (PWM), pulse-frequency modulation (PFM), or discontinuous mode (DCM) control schemes. Built-in compensation across the output voltage range eliminates the need for external components. The feedback (FB) regulation accuracy over -40°C to +125°C is ±1.1%. 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 active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage. The device is available in a compact (5mm x 5mm) TQFN lead (Pb)-free package with an exposed pad. Simulation models are available.

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设计,建造,测试

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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 设计套件

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
maxrefdes1050-schematic PDF 12KB 2019-07-09
MAXREFDES1050 - Design Verification Testing PDF 116KB 2019-07-09
maxrefdes1050-bom PDF 84KB 2019-07-09
maxrefdes1050-pcb PDF 2MB 2019-07-09
日期 类型
2019-07-09

maxrefdes1050-schematic

(PDF, 12KB)

2019-07-09

MAXREFDES1050 - Design Verification Testing

(PDF, 116KB)

2019-07-09

maxrefdes1050-bom

(PDF, 84KB)

2019-07-09

maxrefdes1050-pcb

(PDF, 2MB)

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