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Dual 1A 1.5MHz同步降压转换器--AT7172

产品分类: 稳压管 LDO
    The AT7172 is a dual high-efficiency Pulse-Width Modulated(PWM) step-down DC-DC converter. It is capable of delivering 1A output current over a wide input voltage range from 2.6V to 5.5V, the AT7172 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and other handheld devices.
    订购热线:400-788-7770
    3A降压转换调节器--AT2596
    3A降压转换调节器--AT2596
    The AT2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator capable of driving a 3A load with excellent line and load regulation. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation,and a fixed-frequency oscillator. A standard series
    3A辍学率调节器--AT818
    3A辍学率调节器--AT818
    The AT818 is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at up to 3A amps. It operates with a VIN as low as 1.8V,with output voltage programmable as low as 0.8V.
    600mA辍学率调节器--AT805
    600mA辍学率调节器--AT805
    The AT805 is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at 600mA amps. It operates with a VIN as low as 1.8V, with output voltage programmable as low as 0.8V. The AT805 features ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, the AT805 has an enable pin to furt

                 Dual 1A 1.5MHz同步降压转换器--AT7172

      一 概述

      The AT7172 is a dual high-efficiency Pulse-Width Modulated(PWM) step-down DC-DC converter. It is capable of delivering 1A output current over a wide input voltage range from 2.6V to 5.5V, the AT7172 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and other handheld devices.
      Two operational modes are available:PWM/Low-Dropout auto-switch and shutdown modes. Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.
      The AT7172 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper PMOS.The AT7172 enter shutdown mode and consumes less than 0.1µA when EN pin is pulled low.
      The switching ripple is easily smoothed-out by small
      package filtering elements due to a fixed operation
      frequency of 1.5MHz.

      二 特性

      2.6V to 5.5V input voltage range
      Output Adjustable from 0.6V to VIN
      280/200m? Internal Power MOSFET Switch
      Stable with Low ESR Output Ceramic
      Capacitors
      Up to 95% Efficiency
      Less than 1µA Shutdown Current
      1.5Mhz Switching Frequency
      Thermal Shutdown Protection
      Current limit and short circuit protections.
      Available in TDFN3x3-10L& TDFN3x3-12L
      Pb-Free Package
      Build-in soft start function

       

      三 应用

      Cellular Telephones
      Wireless and DSL Modems
      Digital Still Cameras
      Mp3 Players
      Portable Instruments
      Microprocessors and DSP Core Supplies

      四 封装

       

      五 应用电路图

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      3A降压转换调节器--AT2596
      3A降压转换调节器--AT2596
      The AT2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator capable of driving a 3A load with excellent line and load regulation. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation,and a fixed-frequency oscillator. A standard series
      3A辍学率调节器--AT818
      3A辍学率调节器--AT818
      The AT818 is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at up to 3A amps. It operates with a VIN as low as 1.8V,with output voltage programmable as low as 0.8V.
      600mA辍学率调节器--AT805
      600mA辍学率调节器--AT805
      The AT805 is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at 600mA amps. It operates with a VIN as low as 1.8V, with output voltage programmable as low as 0.8V. The AT805 features ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, the AT805 has an enable pin to furt
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      全国咨询热线:400-788-7770

      销售电话:0769-81150556
      工程电话:0769-85638990

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      邮箱:dgzm699@163.com

      地址:东莞市矮岭冚村沿河东街8号