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1节至3节电池、大功率(1A)、低噪声、升压型DC-DC转换器

紧凑的高效、低噪声升压转换器,带有增益电路

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) 2.2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.8
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
ICC (mA) (typ) 0.035
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 20
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.06
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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) 2.2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.8
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
ICC (mA) (typ) 0.035
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 20
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.06

主要特征

  • Up to 96% Efficiency
  • 1.1 VIN Guaranteed Start-Up
  • 0.7V to 5.5V Input Range
  • Up to 800mA Output
  • Step-Up Output (adjustable from 2.5V to 5.5V)
  • PWM/PFM Synchronous-Rectified Topology
  • External Clock or Internal 300kHz Oscillator
  • 3µA Logic-Controlled Shutdown
  • Power-Good Output (MAX1701)
  • Low-Battery Comparator (MAX1701)
  • Uncommitted Gain Block (MAX1701)

应用/用途

  • 数字无绳电话
  • 手持式仪表(PDA、掌上电脑)
  • 掌上电脑
  • PCS电话
  • 个人通信装置
  • 双向寻呼
  • 无线手机

描述

The MAX1700/MAX1701 are high-efficiency, low-noise, step-up DC-DC converters intended for use in battery-powered wireless applications. They use a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs such as one to three NiCd/NiMH cells or one Li-Ion cell. Both devices have an internal 1A, 130mΩ N-channel MOSFET switch and a 250mΩ P-channel synchronous rectifier.

With their internal synchronous rectifier, the MAX1700/ MAX1701 deliver 5% better efficiency than similar nonsynchronous converters. They also feature a pulse-frequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 3µA shutdown mode.

The MAX1700/MAX1701 come in 16-pin QSOP packages (which occupy the same space as an 8-pin SO). The MAX1701 includes two comparators to generate power-good and low-battery warning outputs. It also contains a gain block that can be used to build a linear regulator using an external P-channel pass device.

For higher-power outputs, refer to the MAX1703. For dual outputs (step-up and linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849.

The MAX1701 evaluation kit is available to speed design time.

简化框图

MAX1700、MAX1701:典型工作电路 MAX1700、MAX1701: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

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