LM5008ASD/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 DC/DC converter is a functional variant of the LM5008 COT buck switching regulator. The functional differences of the LM5008A are: a minimum input operating voltage of 6V, a slightly different on-time formula, and the removal of the minimum load current requirement. The LM5008A 350mA buck switching regulator incorporates all the features necessary to implement a low-cost, high-efficiency buck regulator. This high-voltage converter features an integrated 100V N-channel buck switch and operates over an input voltage range of 6V to 95V. The device is easy to implement and is available in an 8-pin VSSOP package and a thermally enhanced 8-pin WSON package. The converter employs a PWM control scheme in which the on-time is inversely proportional to V_IN, allowing the operating frequency to remain relatively constant. This control scheme requires no loop compensation. The device implements intelligent current limiting, with a forced off-time that is inversely proportional to V_OUT. This approach ensures short-circuit control while providing minimal foldback. Additional features include: thermal shutdown, V_CC undervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and pre-charge switch.

Applications

• Non-isolated telecom buck regulator
• Secondary-side high-voltage post-regulator
• 48V automotive systems

Key features

• Operating input voltage range: 6V to 95V
• Integrated 100V N-channel buck switch
• Internal startup regulator
• No loop compensation required
• Ultra-fast transient response
• On-time inversely proportional to input voltage
• Constant operating frequency over line voltage and load current variations
• Adjustable output voltage (2.5V reference voltage)
• High operating efficiency
• Precision internal reference voltage
• Low bias current
• Intelligent current limiting
• Thermal shutdown
• 8-pin VSSOP and 8-pin WSON packages
• Create custom designs using LM5008A and its WEBENCH Power Designer