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4A、低噪声、高频、升压型DC-DC转换器

3V至5V升压型DC-DC,可提供4A输出,内置开关

产品详情

主要特征

应用/用途

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.7
VIN (V) (max) 5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 4
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
ICC (mA) (typ) 0.2
# DC-DC Outputs 1
Switching Frequency (kHz) 600
Package/Pins SOIC (N)/16
TSSOP/28
Budgetary
Price (See Notes)
5.25
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简化框图

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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.7
VIN (V) (max) 5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 4
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
ICC (mA) (typ) 0.2
# DC-DC Outputs 1
Switching Frequency (kHz) 600
Package/Pins SOIC (N)/16
TSSOP/28
Budgetary
Price (See Notes)
5.25

主要特征

  • Integration Reduces External Component Count to Save Space
    • On-Chip 10A Power MOSFET
    • 5V, 4A Output from a 3.3V Input
    • Fixed 3.3V or 5V Output Voltage or Adjustable (2.5V to 5.5V)
    • Input Voltage Range Down to 0.7V
  • ConstantFrequencyReducesPost-Filtering
    • Low-Noise, Constant-Frequency Operation (600kHz)
    • Synchronizable Switching Frequency (350kHz to 1000kHz)
  • Lower Power Consumption Extends Battery Life
    • 1mW Quiescent Power

应用/用途

  • 手持通信装置的3.6V或5V RF PA
  • 本地2.5V至3.3V或5V转换器
  • 本地3.3V至5V转换器
  • 路由器、服务器、工作站、卡架

描述

The MAX1709 sets a new standard of space savings for high-power, step-up DC-DC conversion. It delivers up to 20W at a fixed (3.3V or 5V) or adjustable (2.5V to 5.5V) output, using an on-chip power MOSFET from a +0.7V to +5V supply.

Fixed-frequency PWM operation ensures that the switching noise spectrum is constrained to the 600kHz fundamental and its harmonics, allowing easy postfiltering for noise reduction. External clock synchronization capability allows for even tighter noise spectrum control. Quiescent power consumption is less than 1mW to extend operating time in battery-powered systems.

Two control inputs (ONA, active-low ONB) allow simple push-on, push-off control through a single momentary pushbutton switch, as well as conventional on/off logic control. The MAX1709 also features programmable soft-start and current limit for design flexibility and optimum performance with batteries.

The MAX1709 is supplied in both a high-power TSSOP package, which allows a 10ARMS switch current and a 4A output, and a narrow SO package, which supplies a 2.4A output with a switch rated at 6ARMS. Although the narrow SO device has a lower RMS switch rating, it has the same peak switch current rating as the TSSOP device, and so can supply 4A loads intermittently. If loads of 2A or less are required, refer to the MAX1708.

简化框图

MAX1709:典型工作电路 MAX1709: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