LTC3830-1数据手册集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF

描述 Description

The LTC®3830/LTC3830-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 1.xV-3.xV step-down applications. A precision internal reference and feedback system provide ±1% output regulation over temperature, load current and line voltage variations. The LTC3830/LTC3830-1 use a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without a current sense resistor.
The LTC3830/LTC3830-1 operate with an input supply voltage as low as 3V and with a maximum duty cycle of >91% over temperature. They include a fixed frequency PWM oscillator for low output ripple operation. The 200kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to 500kHz. In shutdown mode, the LTC3830 supply current drops to For a similar, pin compatible DC/DC converter with an output voltage as low as 0.6V, please refer to the LTC3832.

特性 Features

·High Power Switching Regulator Controller for 3.3V-5V to 1.xV-3.xV Step-Down Applications
·No Current Sense Resistor Required
·Low Input Supply Voltage Range: 3V to 8V
·Maximum Duty Cycle >91% Over Temperature
·All N-Channel External MOSFETs
·Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
·High Efficiency: Over 95% Possible
·Adjustable or Fixed 3.3V Output (16-Pin Version)
·Programmable Fixed Frequency Operation: 100kHz to 500kHz
·External Clock Synchronization
·Soft-Start (Some Versions)
·Low Shutdown Current: <10µA
·Overtemperature Protection
·Available in S8, S16 and SSOP-16 Packages

应用 Application

·CPU Power Supplies
·Multiple Logic Supply Generator
·Distributed Power Applications
·High Efficiency Power Conversion

简介

LTC3830-1属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的LTC3830-1DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。