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LM3241 - 产品图解：
LM3241-6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
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TI产品 - LM3241介绍

LM3241 - 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers

LM3241是TI德州仪器公司的一款转换器（集成开关）产品，LM3241是6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers，本站介绍了LM3241的封装应用图解、特点和优点、功能等，并给出了与LM3241相关的TI元器件型号供参考。

LM3241 - 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM3241 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell; however, it may be used in many other applications. It steps down an input voltage from 2.7V to 5.5V to an adjustable output voltage from 0.6V to 3.4V. Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA.

The LM3241 offers three modes of operation. In PWM mode the device operates at a fixed frequency of 6MHz (typ.) which minimizes RF interference when driving medium-to-heavy loads. At light load, the device enters into ECO mode automatically and operates with reduced switching frequency. In ECO mode, the quiescent current is reduced and extends the battery life. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typ.).

The LM3241 is available in a 6-bump lead-free DSBGA package. A high-switching frequency (6MHz) allows use of tiny surface-mount components. Only three small external surface-mount components, an inductor and two ceramic capacitors are required.

产品特性

  • 6MHz (typ.) PWM Switching Frequency
  • Operates from a Single Li-Ion Cell (2.7V to 5.5V)
  • Adjustable Output Voltage (0.6V to 3.4V)
  • 750 mA Maximum Load Capability
  • High Efficiency (95% typ. at 3.9VIN, 3.3VOUT at 500 mA)
  • Automatic ECO/PWM mode change
  • 6-bump DSBGA Package
  • Current Overload Protection
  • Thermal Overload Protection
  • Soft Start Function
  • CIN and COUT are 0402 (1005) case size and 6.3V of rated-voltage ceramic capacitor
  • Small Chip Inductor in 0805 (2012) case size

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