TPS40021集成电路（IC）的DC-DC开关控制器规格书PDF中文资料

TPS40021属于集成电路（IC）的DC-DC开关控制器。由德州仪器制造生产的TPS40021DC-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。

1FEATURES

23· 2.25-V to 5.5-V Input

· Output Voltage from 0.6 V to 90% of VIN

· High-Side Drive for N-Channel FET

· Supports Pre-Biased Outputs

· Adaptive Anti-Cross Conduction Gate Drive

· 1%, 0.6-V Reference

· Two Fixed Switching Frequency Versions,

TPS40040 (300 kHz) and TPS40041 (600 kHz)

· Three Selectable Short Circuit Protection

Levels of 105 mV, 180 mV and 310 mV

· Hiccup Restart from Faults

· Voltage Mode Control

· Active Low Enable

· Thermal Shutdown Protection at 145C

· 8-Pin, 3-mm x 3-mm SON with Ground

Connection to Thermal Pad

APPLICATIONS

· Point of Load

· Telecommunications

· DC to DC Modules

· Set Top Boxes

CONTENTS

Device Ratings 2

Electrical Characteristics 3

Device Information 8

Application Information 10

Design Examples 19

Additional References 32

DESCRIPTION

The TPS40040 and TPS40041 dc-to-dc controllers

are designed to operate from a 2.25-V to 5.5-V input

source. To reduce the number of external

components, several operating parameters are fixed

internally; namely, frequency, soft start time, and

short circuit protection (SCP) levels. For example, the

operating frequencies of TPS40040/1 are 300

kHz/600 kHz, respectively.