TPS64203中文资料1.8V 至 6.5V 输入、800kHz、效率为 95% 的降压控制器，20uA，采用 SOT-23 封装数据手册TI规格书

描述 Description

The TPS6420x are nonsynchronous step-down controllers that are ideally suited for systems powered from a 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllers drive an external P-channel MOSFET allowing design flexibility. To achieve highest efficiency over a wide load current range, this controller uses a minimum on time, minimum off time control scheme and consumes only 20-µA quiescent current. The minimum on time of typically 600 ns (TPS64203) allows the use of small inductors and capacitors. When disabled, the current consumption is reduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of –40°C to 85°C.

特性 Features

• Step-Down Controller for Applications With up to 95% Efficiency
• 1.8-V to 6.5-V Operating Input Voltage Range
• Adjustable Output Voltage Range From 1.2 V to VI
• High Efficiency Over a Wide Load Current Range
• 100% Maximum Duty Cycle for Lowest Dropout
• Internal Softstart
• 20-µA Quiescent Current (Typical)
• Overcurrent Protected
• Available in a SOT23 Package
• APPLICATIONS
• USB Powered Peripherals
• Organizers, PDAs, and Handheld PCs
• Low Power DSP Supply
• Digital Cameras
• Hard Disk Drives
• Portable Audio Players

简介

TPS64203属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由TI制造生产的TPS64203DC-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。