• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The TPS5140 is a dc/dc controller that incorporates three synchronous-buck controllers and one nonsynchronous 12-V boost converter on one chip to power the voltage rails needed by notebook peripheral components. On-chip high-side and low-side synchronous rectifier drivers are integrated to drive less expensive N-channel power MOSFETs. The nonsynchronous boost converter includes the N channel power MOSFET and supports 120 mA for the PCMCIA power supply. The outputs are controlled independently and two of the synchronous-buck controllers operate 180 degrees out of phase, with the third lowering the input current ripple and allowing a smaller input capacitance to reduce power supply cost. For higher efficiency under all load conditions, the TPS5140 automatically adjusts each channel from the PWM mode to the skip mode independently.

特性

• Three Independent Step-Down DC/DC Controllers and One 12-V Boost DC/DC Converter
• 4.5 V \x96 28 V Input Voltage Range
• Step-Down Controller Output Voltages Adjustable Down to 1.2 V
• Synchronous-Buck Operation for High Efficiency
• PWM Mode Control
• Auto PWM/SKIP Mode for High Efficiency Under All Load Conditions
• High Speed Error Amplifier
• Separate Standby Control and Over Current Protection for Each Channel
• Over Voltage and Under Voltage Protection
• Programmable Short Circuit Protection
• Power Good With Programmable Delay Time
• 5 V and 3.3 V Linear Regulators