TPS5110 - 具有 NMOS LDO 控制器的同步降压 PWM 控制器

TPS5110是TI德州仪器公司的一款控制器（外部开关）产品，TPS5110是具有 NMOS LDO 控制器的同步降压 PWM 控制器，本站介绍了TPS5110的封装应用图解、特点和优点、功能等，并给出了与TPS5110相关的TI元器件型号供参考。

TPS5110 - 具有 NMOS LDO 控制器的同步降压 PWM 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 TPS5110 provides one PWM-mode synchronous buck regulator controller (SBRC) and one low drop-out (LDO) regulator controller. The TPS5110 supports a low-voltage/high-current power supply for I/O and other peripherals in modern digital systems. The SBRC of the TPS5110 automatically adjusts from PWM mode to SKIP mode to maintain high efficiency under all load conditions. The LDO controller drives an external N-channel power MOSFET that realizes fast response and ultra-low dropout voltage. A unique overshoot protection circuit prevents a voltage hump at fast load decreasing transients. The current protection circuit for SBRC detects the drain-to-source voltage drop across the low-side and high-side power MOSFET while it is conducting. Also, the current protection circuit has a temperature coefficient to compensate for the RDS(on) variation of the MOSFET. This resistor-less current protection simplifies the system design and reduces the external parts count. The LDO controller includes current-limit protection. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.

产品特性

Switching Mode Step-Down dc-to-dc Controller With Fast LDO Controller
Input Voltage Range Switcher: 4.5 V to 28 V LDO: 1.1 V to 3.6 V
Output Voltage Range Switcher: 0.9 V to 3.5 V LDO: 0.9 V to 2.5 V
Synchronous for High Efficiency
Precision VREF (±1 %)
PWM Mode Control: Max. 500-kHz Operation
High-Speed Error Amplifier
Overcurrent Protection With Temperature Compensation Circuit
Overvoltage and Undervoltage Protection
Programmable Short-Circuit Protection
APPLICATIONS
- Notebook PCs, PDAs
- Consumer Game Systems
- DSP Application

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