TPS64203DBVR集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

TPS64203DBVR属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由德州仪器制造生产的TPS64203DBVRDC-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。

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

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.