TPS5140 - 用于笔记本电脑电源的四输出（3 降压，1 升压）高效 DC/DC 控制器

TPS5140是TI德州仪器公司的一款控制器（外部开关）产品，TPS5140是用于笔记本电脑电源的四输出（3 降压，1 升压）高效 DC/DC 控制器，本站介绍了TPS5140的封装应用图解、特点和优点、功能等，并给出了与TPS5140相关的TI元器件型号供参考。

TPS5140 - 用于笔记本电脑电源的四输出（3 降压，1 升压）高效 DC/DC 控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

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. The skip mode enables a lower operating frequency and shortens the pulse width to the low side MOSFETs, thereby increasing the efficiency under light load conditions. To further extend battery life, the TPS5140 features dead-time control and very low quiescent current. Resistorless current protection and the fixed high-side driver voltage simplify the system design and reduce the external parts count.

产品特性

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

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