概览

优势和特点

  • Easy to Use
    • 2.7V to 5.5V Input
    • Adjustable 0.8V to 3.3V Output
    • ±1% Feedback Accuracy
    • Up to 700mA Output Current
    • Fixed 2MHz or 4MHz Operation
    • 100% Duty-Cycle Operation
    • Internally Compensated
    • All Ceramic Capacitors
  • High Efficiency
    • Selectable PWM- or PFM-Mode of Operation
    • Shutdown Current as Low as 0.1μA (typ)
  • Flexible Design
    • Internal Soft-Start and Prebias Startup
    • Open-Drain Power Good Output (PGOOD Pin)
  • Robust Operation
    • Overtemperature Protection
    • Overcurrent Protection
    • -40°C to +125°C Ambient Operating
    • Temperature/-40°C to +150°C Junction Temperature

产品详情

MAX17625 and MAX17626 are high-frequency synchronous step-down DC-DC converters with integrated MOSFETs and compensation components that operate over a 2.7V to 5.5V input-voltage range. MAX17625 and MAX17626 support up to 700mA load current and allow the use of small, low-cost input and output capacitors. The output voltage can be adjusted from 0.8V to 3.3V.

When the EN pin is asserted, an internal power-up sequence ramps up the error-amplifier reference, resulting in output-voltage soft-start. The FB pin monitors the output voltage through a resistor-divider. The devices select either PFM or forced-PWM mode depending on the state of the MODE pin at power-up. By pulling the EN pin to low, the devices enter shutdown mode and consume only 0.1µA (typ) of standby current.

The devices use an internally compensated, fixed-frequency, peak-current mode control scheme. On the falling edge of an internal clock, the high-side pMOSFET turns on and continues to be on during normal operation until at least the rising edge of the clock (for 40ns). An internal error amplifier compares the feedback voltage to a fixed internal reference voltage and generates an error voltage. The error voltage is compared to the sum of the current-sense voltage and the slope-compensation voltage by the PWM comparator to set the on-time. During the on-time of the pMOSFET, the inductor current ramps up. For the remainder of the switching period (off-time), the pMOSFET is kept off and the low-side nMOSFET turns on. During the off-time, the inductor releases the stored energy as the inductor current ramps down, providing current to the output. Under overload conditions, the cycle-by-cycle current-limit feature limits the inductor peak current by turning off the high-side pMOSFET and turning on the low-side nMOSFET.

Applications

  • Factory Automation
  • Personal Electronics
  • Point-of-Load Power Supply

产品生命周期 icon-recommended 量产

该产品系列中至少有一个型号已量产并可供采购。该产品适合用于新设计,但也可能有更新的替代产品。

评估套件 (2)

工具及仿真模型

EE-Sim® DC-DC工具

EE-Sim DC-DC转换器工具可根据您的要求快速创建完整的电源设计,包括原理图、BOM(采用市售部件)、时域和频域仿真。您可以下载自定义原理图,在独立EE-Sim OASIS仿真器中进一步分析,其中采用SIMPLIS和SIMetrix SPICE引擎。

EESim-Pdp-Spotlight

设计资源

ADI始终把满足您可靠性水平的产品放在首要位置。我们通过在所有产品、工艺设计和制造过程中引入高质量和可靠性检查实践这一承诺。发运的产品实现“零缺陷”始终是我们的目标。

样片申请及购买

有关在线购买、支付方式及更多问题,请参阅我们的 常见问题解答。

在线购买:
以上所列报价单仅供人民币结算及大陆购买使用, ADI均提供正规发票,如需美金结算及其他地区购买请直接跳转至英文页面进行购买。

所有库存均为仓库现货,可点击“加入购物车”按钮进行购买。登录您的myAnalog账号可以在您的购物车中查询到购买详情。如果您还没有myAnalog账号,您可先创建一个新的账号再进行购买。如果您有任何关于在线购买的问题,请联系cic.china@analog.com。

样片申请:
选择上方“样片申请”按钮将指向ADI授权第三方网站进行样片申请。登录您的myAnalog账号可以在您的购物车中查询到样片申请详情。如果您还没有myAnalog账号,请先创建一个新账号。有关样片申请的任何问题,请联系SampleSupport@analog.com。


价格表帮助

 

购买评估板

所示报价为单片价格

以上评估板报价仅供人民币结算及大陆购买使用, ADI均提供正规发票,如需美金结算及其他地区购买请直接跳转至英文页面进行购买。