MAX17008

双通道、可组合的QPWM图形核控制器,用于笔记本电脑

双通道开关模式电源,可组合工作在2相单输出模式下


点击查看特定型号的库存状况。

说明

MAX17007A/MAX17007B/MAX17008是双通道Quick-PWM™降压控制器,为电池供电系统提供通用电源。双通道开关电源(SMPS)还可组合工作在两相单输出模式。固定导通时间Quick-PWM模式提供快速负载瞬态响应,轻松实现宽输入/输出(I/O)电压比条件下的稳压,同时保持相对固定的开关频率。通过外部电阻可以调节开关频率,调节范围200kHz至600kHz。差分输出电流检测架构允许利用检流电阻实现高精度限流,或利用电感的等效直流电阻(DCR)实现低功耗无损检测,可保持0.7%的输出精度。过压(仅MAX17007A/MAX17007B)、欠压保护以及精确的用户可选限流(15mV、30mV、45mV和60mV)确保系统可靠工作。

SMPS输出可工作在跳频模式或超声模式,以提高轻载效率。跳脉冲模式下保持25kHz的最小开关频率,而超声模式下能够消除可闻噪声。

通过改变REFIN1引脚的电压动态调节SMPS1的输出电压。该器件包括0.5%精度的基准,用于设置REFIN1电压。外部5V偏置电源为内部电路及其栅极驱动器供电。

独立的通/断控制具有经过调理的逻辑门限,电源就绪漏极开路输出可提供灵活的系统配置。为了抑制启动时的浪涌电流,SMPS1的CSL1内部电压以1.3mV/µs的斜率从零缓慢上升至最终电压,SMPS2的FB2内部电压则以0.65mV/µs的斜率从零缓慢上升至最终电压。为了避免在断电时输出振铃使电压达到地电位以下,内部电压以各自相同的斜率从稳压值缓慢跌落至零。内部集成自举开关,无需外部自举二极管。

MAX17007A/MAX17007B/MAX17008采用节省空间的28引脚、4mm x 4mm TQFN封装,底部带裸焊盘。与MAX17007A相比,MAX17007B改善了串扰特性。
MAX17007A、MAX17008:功能框图 MAX17007A、MAX17008:功能框图 放大+

关键特性

  • 具有快速瞬态响应的双通道Quick-PWM
  • REFIN1自动动态检测和PGOOD1/故障屏蔽
  • 固定和可调输出电压
    • 在整个电源电压和负载变化范围内,输出精度保持在±0.7%
    • OUT1:0至2V动态输出或预设为1.05V
    • OUT2:0.7V至2V或预设为1.5V
  • 电阻可编程开关频率
  • 集成BST开关
  • 差分电流检测输入
    • 低成本DCR检测或高精度检流电阻检测
    • 内部电流检测补偿
  • 可组合的工作模式支持大电流动态输出
  • 可选择强制PWM、跳脉冲或超声工作模式
  • 最大额定输入电压26V
  • 独立的使能输入
  • 独立的电源就绪输出
  • 过压保护(仅MAX17007A/MAX17007B)
  • 欠压/热保护
  • 软启动和软关断

应用

  • 2节至4节Li+电池供电设备
  • GPU核电源
  • 低功耗I/O电源
  • 笔记本电脑

请查看具体的参数规格 Step-Down Switching Regulators (409)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
IOUT1
(A)
(min)(max)(min)(max)
MAX17007A 4.526025

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。

MAX17007AEVKIT: MAX17007A评估板
MAX17039EVKIT: MAX17000、MAX17007A和MAX17039评估板
申请可靠性报告: MAX17008 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

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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