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高效率、低电源电流、紧凑的、升压型DC-DC转换器

紧凑的低成本、低噪声设计:电感阻尼开关可有效降低纹波,改善EMI抑制

产品详情

主要特征

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Power Good Signal Yes
Synchronous Switching? Yes
ICC (mA) (typ) 0.016
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.33
缩小

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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Power Good Signal Yes
Synchronous Switching? Yes
ICC (mA) (typ) 0.016
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.33

主要特征

  • 94% Efficient at 200mA Output Current
  • 16µA Quiescent Supply Current
  • Internal Synchronous Rectifier (no external diode)
  • 0.1µA Logic-Controlled Shutdown
  • LBI/LBO Low-Battery Detector
  • Selectable Current Limit for Reduced Ripple
  • Low-Noise, Anti-Ringing Feature (MAX1676)
  • 8-Pin and 10-Pin µMAX Packages
  • Preassembled Evaluation Kit (MAX1676EVKIT)

应用/用途

  • 1节至3节电池供电的手持设备
  • 手持式计算机
  • 医疗设备
  • 寻呼机
  • PDA
  • 射频标记
  • 无线电话

描述

The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small µMAX packages. They feature a built-in synchronous rectifier, which improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. Quiescent supply current is only 16µA.

The input voltage ranges from 0.7V to VOUT, where VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The MAX1674/MAX1675/MAX1676 have a preset, pin-selectable output for 5V or 3.3V. The outputs can also be adjusted to other voltages using two external resistors.

All three devices have a 0.3Ω N-channel MOSFET power switch. The MAX1674 has a 1A current limit. The MAX1675 has a 0.5A current limit, which permits the use of a smaller inductor. The MAX1676 comes in a 10-pin µMAX package and features an adjustable current limit and circuitry to reduce inductor ringing.

简化框图

MAX1674、MAX1675、MAX1676:典型工作电路 MAX1674、MAX1675、MAX1676:典型工作电路 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

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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