MAX8649, MAX8649A

1.8A降压型调节器,提供远端检测,2mm x 2mm WLP封装

高性能应用处理器的理想选择,在整个输入电源、负载和温度的工作范围内保持优于2%的电压精度


点击查看特定型号的库存状况。

说明

MAX8649高效DC-DC降压开关调节器可提供高达1.8A输出电流。器件工作于2.5V至5.5V输入电压范围,适用于下一代电池技术。输出电压可通过I²C接口在0.75V至1.38V范围内设置。远端检测保证了负载端精确的直流电压。在整个负载、电源和温度范围内输出总误差小于2%。

MAX8649工作于3.25MHz固定频率,较高的工作频率大大减小了外部元件尺寸。MAX8649提供多种功能,以降低DC-DC降压转换器的EMI。转换器的开关频率可以同步至系统主时钟。当同步至外部时钟时,MAX8649测量外部时钟的频率,确保在切换到外部时钟之前保持该时钟稳定。

片内DAC允许以10mV步长调节输出电压。输出电压可以通过I²C接口直接设置,也可以预先加载至片内寄存器,然后使用2个VID逻辑信号选择适当的寄存器。器件的其它功能包括可降低浪涌电流的内部软启动控制电路、输出过压、过流和过热保护。
MAX8649:典型工作电路 MAX8649:典型工作电路 放大+

关键特性

  • 输出电流可达1.8A
  • I²C可编程VOUT (750mV至1.38V,步长为10mV)
  • 工作于2.5V至5.5V输入电源
  • 片内FET和同步整流器
  • 3.25MHz固定PWM开关频率
  • 可同步至13MHz、19.2MHz或26MHz系统时钟
  • 小尺寸1.0µH电感
  • 1.25V输出时初始精度为0.5%
  • 整个负载、电源和温度范围内输出精度保持在2%以内
  • 省电模式提高轻载效率
  • 过压和过流保护
  • 热关断保护
  • 400kHz I²C接口
  • 关断电流小于1µA
  • 16焊球、2.2mm x 2.2mm WLP封装

应用

  • 蜂窝电话与智能电话
  • PDA和MP3播放器
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX8649 2.55.50.751.38
1.05
1.23
1.27
Digital/VID1.8InternalYes13250
WLP/16
$1.72 @1k
查看所有Step-Down Switching Regulators (367)
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。


MAX8649EVKIT: MAX8649评估板

技术资料

设计指南 5133 Power-Supply Solutions for Altera FPGAs
设计指南 5132 Power-Supply Solutions for Xilinx FPGAs

质量和环境数据

申请可靠性报告: MAX8649  MAX8649A 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX8649AEWE+
  • MAX8649AEWE+T
  • MAX8649EWE+
  • MAX8649EWE+T
  • 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。

    质量管理体系 >
    环境管理体系 >

     
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