MAX1703

1节至3节电池、大功率(1.5A)、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


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说明

The MAX1703 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. It uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate a 2.5V to 5.5V output from battery inputs, such as one to three NiCd/NiMH cells or one Li-Ion cell. The device includes a 2A, 75mΩ, N-channel MOSFET switch and a 140mΩ, P-channel synchronous rectifier.

With its internal synchronous rectifier, the MAX1703 delivers up to 5% better efficiency than similar nonsynchronous converters. It also features a pulse-frequency-modulation (PFM) low-power mode to improve efficiency at light loads, and a 1µA shutdown mode.

The MAX1703 comes in a 16-pin narrow SO package and includes an uncommitted comparator that generates a power-good or low-battery-warning output. It also contains a linear gain block that can be used to build a linear regulator.

For lower-power outputs and a smaller package, refer to the MAX1700/MAX1701. For dual outputs (step-up plus linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849.

The MAX1703 evaluation kit is available to speed designs.
MAX1703:典型工作电路 MAX1703:典型工作电路 放大+

关键特性

  • Up to 95% Efficiency
  • Up to 1.5A Output
  • Fixed 5V or Adjustable Step-Up Output (2.5V to 5.5V)
  • 0.7V to 5.5V Input Range
  • Low-Power Mode (300µW)
  • Low-Noise, Constant-Frequency Mode (300kHz)
  • Synchronizable Switching Frequency (200kHz to 400kHz)
  • 1µA Logic-Controlled Shutdown
  • Power-Good Comparator
  • Uncommitted Gain Block

应用

  • 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
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeSynchronous SwitchingICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX1703 0.75.52.55.551.5ResistorInternalYes0.0650.1201400
SOIC (N)/16
$4.89 @1k
查看所有Step-Up Switching Regulators (97)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX1703EVKIT: MAX1703评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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