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Maxim产品 - MAX15462介绍

MAX15462 - 42V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

MAX15462是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX15462是42V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters，本站介绍了MAX15462的封装应用图解、特点和优点、功能等，并给出了与MAX15462相关的Maxim元器件型号供参考。

MAX15462 - 42V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters - DC-DC开关调节器 - Industry’s Smallest High-Voltage Synchronous Buck Regulator - 美信半导体

产品概述

The MAX15462 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integrated MOSFETsoperates over a 4.5V to 42V input voltage range. Theconverter delivers output current up to 300mA at 3.3V(MAX15462A), 5V (MAX15462B), and adjustable outputvoltages (MAX15462C). The device operates over the-40°C to +125°C temperature range and is available in acompact 8-pin (2mm x 2mm) TDFN package. Simulationmodels are available.

The device employs a peak-current-mode control architecturewith a MODE pin that can be used to operate thedevice in the pulse-width modulation (PWM) or pulsefrequencymodulation (PFM) control schemes. PWM operationprovides constant frequency operation at all loadsand is useful in applications sensitive to variable switchingfrequency. PFM operation disables negative inductorcurrent and additionally skips pulses at light loads for highefficiency. The low-resistance on-chip MOSFETs ensurehigh efficiency at full load and simplify the PCB layout.

To reduce input inrush current, the device offers aninternal soft-start. The device also incorporates an EN/UVLO pin that allows the user to turn on the part at thedesired input-voltage level. An open-drain active-low RESET pin canbe used for output-voltage monitoring.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Eliminates External Components and ReducesTotal Cost
  • No SchottkySynchronous Operation for HighEfficiency and Reduced Cost
  • Internal Compensation
  • Internal Feedback Divider for Fixed 3.3V, 5VOutput Voltages
  • Internal Soft-Start
  • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
  • Wide 4.5V to 42V Input Voltage Range
  • Fixed 3.3V and 5V Output Voltage Options
  • Adjustable 0.9V to 0.89 x VIN Output Voltage Option
  • Delivers Up to 300mA Load Current
  • Configurable Between PFM and Forced-PWMModes
  • Reduces Power Dissipation
  • Peak Efficiency = 92%
  • PFM Feature for High Light-Load Efficiency
  • Shutdown Current = 2.2μA (typ)
  • Operates Reliably in Adverse Industrial Environments
  • Hiccup-Mode Current Limit and Autoretry Startup
  • Built-In Output Voltage Monitoring with Open-DrainActive-Low RESET Pin
  • Programmable EN/UVLO Threshold
  • Monotonic Startup into Prebiased Output
  • Overtemperature Protection
  • -40°C to +125°C Automotive/IndustrialTemperature Range
    • 热门应用
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  • 替代高压LDO
  • HVAC与楼宇控制
  • 工业传感器
  • 过程控制
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