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28V、PWM、升压型DC-DC转换器

高压、大电流升压转换器,QSOP封装,还可提供SEPIC、反激拓扑

产品详情

主要特征

应用/用途

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 28
VOUT1 (V) (min) 3
VOUT1 (V) (max) 28
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 12
Output Adjust. Method Resistor
ICC (mA) (typ) 0.5
Shutdown Mode Supply Current (µA) (typ) 3
Shutdown Mode Supply Current (µA) (max) 8
# DC-DC Outputs 1
Switching Frequency (kHz) 250
Package/Pins QSOP/16
Budgetary
Price (See Notes)
4.26
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简化框图

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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 28
VOUT1 (V) (min) 3
VOUT1 (V) (max) 28
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 12
Output Adjust. Method Resistor
ICC (mA) (typ) 0.5
Shutdown Mode Supply Current (µA) (typ) 3
Shutdown Mode Supply Current (µA) (max) 8
# DC-DC Outputs 1
Switching Frequency (kHz) 250
Package/Pins QSOP/16
Budgetary
Price (See Notes)
4.26

主要特征

  • Adjustable Output Voltage Up to +28V
  • Up to 93% Efficiency
  • Wide Input Voltage Range (+3V to +28V)
  • Up to 500mA Output Current at +12V
  • 500µA Quiescent Supply Current
  • 3µA Shutdown Current
  • 250kHz Switching Frequency
  • Small 1W, 16-Pin QSOP Package

应用/用途

  • 工业+24V和+28V系统
  • LCD显示器
  • 掌上电脑

描述

The MAX618 CMOS, PWM, step-up DC-DC converter generates output voltages up to 28V and accepts inputs from +3V to +28V. An internal 2A, 0.3Ω switch eliminates the need for external power MOSFETs while supplying output currents up to 500mA or more. A PWM control scheme combined with Idle Mode™ operation at light loads minimizes noise and ripple while maximizing efficiency over a wide load range. No-load operating current is 500µA, which allows efficiency up to 93%.

A fast 250kHz switching frequency allows the use of small surface-mount inductors and capacitors. A shutdown mode extends battery life when the device is not in use. Adaptive slope compensation allows the MAX618 to accommodate a wide range of input and output voltages with a simple, single compensation capacitor.

The MAX618 is available in a thermally enhanced 16-pin QSOP package that is the same size as an industry-standard 8-pin SO but dissipates up to 1W. An evaluation kit (MAX618EVKIT) is available to help speed designs.

简化框图

MAX618:典型工作电路 MAX618:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心