TPS5103数据手册集成电路（IC）的DC-DC开关控制器规格书PDF

描述 Description

The TPS5103 is a synchronous buck dc/dc controller, designed for notebook PC system power. The controller has three user-selectable operation modes available: hysteretic mode, fixed-frequency PWM control, or SKIP control. In high-current applications, where fast transient response is advantageous for reducing bulk capacitance, the hysteretic mode is selected by connecting the RT pin to VREF5. Selecting the PWM/SKIP modes for less demanding transient applications is ideal for conserving notebook battery life under light load conditions. The device includes high-side and low-side MOSFET drivers capable of driving low r ds(on) N-channel MOSFETs. The user-selectable overcurrent protection (OCP) threshold is set by an external TRIP-pin resistor in order to protect the system. The TPS5103 is configured so that a current-sense resistor is not required, improving the operating efficiency.

特性 Features

• Step-Down DC-DC Converter
• Three Operation-Modes

• Heavy Load:
• Fixed Frequency PWM
• Hysteretic (User Selectable)

• Light Load:
• Skip Mode

• 4.5-V to 25-V Input Voltage Range
• Adjustable Output Voltage Down to 1.2 V
• 95% Efficiency
• Standby Control
• Overcurrent Protection
• UVLO for Internal 5-V Regulation
• Low-Standby Current . . . 0.5 mA Typical
• TA = -40°C to 85°C