LM5008ASDX/NOPB

LM5008A 直流/直流转换器是LM5008 COT 降压开关稳压器的功能变型。LM5008A 的功能差异表现在：最低输入运行电压为6V，导通时间公式稍有不同且去除了最小负载电流要求。 LM5008A 350mA 降压开关稳压器具有实现低成本高效率的降压稳压器所需的全部功能。此高电压转换器具有集成型100V N 沟道降压开关，且可在6V 至95V的输入电压范围内运行。该器件易于实施，且可采用8引脚VSSOP 封装和热增强型8 引脚WSON 封装。该转换器使用了PWM 控制方案，导通时间与 V_IN 成反比。此特性使得运行频率能够保持相对恒定。该控制方案不需要任何环路补偿。该器件实现了智能电流限制，其强制关闭时间与 V_OUT 成反比。该方案可在提供最低折返的同时确保实现短路控制。其他特性包括：热关断、V_CC 欠压锁定、栅极驱动欠压锁定、最大占空比限幅器和预充电开关。

The LM5008A regulator is an easy-to-use buck DC-DC converter that operates from 6-V to 95-V supply voltage. The device is intended for step-down conversions from 12-V, 24-V, and 48-V unregulated, semi-regulated and fully-regulated supply rails. With integrated buck power MOSFET, the LM5008A delivers up to 350-mA DC load current with exceptional efficiency and low input quiescent current in a very small solution size. Designed for simple implementation, a nearly fixed-frequency, constant on-time (COT) operation with discontinuous conduction mode (DCM) at light loads is ideal for low-noise, high current, fast transient load requirements. Control loop compensation is not required reducing design time and external component count. The LM5008A incorporates other features for comprehensive system requirements, including VCC undervoltage lockout (UVLO), gate drive undervoltage lockout, maximum duty cycle limiter, intelligent current limit off-timer, a pre-charge switch, and thermal shutdown with automatic recovery. These features enable a flexible and easy-touse platform for a wide range of applications. The pin arrangement is designed for simple and optimized PCB layout, requiring only a few external components.

• 工作输入电压范围：6V 至95V
• 集成型100V N 沟道降压开关
• 内部启动稳压器
• 无需环路补偿
• 超快瞬态响应
• 导通时间与输入电压成反比变化
• 线路电压和负载电流变化时运行频率保持不变
• 可调节输出电压（以2.5V 为基准电压）
• 高运行效率
• 精密的内部基准电压
• 低偏置电流
• 智能电流限制
• 热关断
• 8 引脚VSSOP 和8 引脚WSON 封装
• 使用LM5008A 及其WEBENCH 电源设计器创建定制设计

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