TL1451AMDREP屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由美國德州儀器公司制造生產(chǎn)的TL1451AMDREPDC-DC 開關控制器PMIC（電源管理集成電路）DC 到 DC 開關式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓撲結(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。

FEATURES

· Controlled Baseline

– One Assembly/Test Site, One Fabrication

Site

· Enhanced Diminishing Manufacturing

Sources (DMS) Support

· Enhanced Product-Change Notification

· Qualification Pedigree (1)

· Complete Pulse-Width Modulation (PWM)

Power-Control Circuitry

· Completely Synchronized Operation

· Internal Undervoltage Lockout Protection

· Wide Supply-Voltage Range

· Internal Short-Circuit Protection

· Oscillator Frequency . . . 500 kHz Max

· Variable Dead Time Provides Control Over

Total Range

· Internal Regulator Provides a Stable 2.5-V

Reference Supply

DESCRIPTION/ORDERING INFORMATION

The TL1451A-EP incorporates on a single monolithic chip all the functions required in the construction of two

pulse-width modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A-EP

contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators,

undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal

amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator

has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be

operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature

locks the outputs off until the internal circuitry is operational.

The TL1451A-EP is characterized for operation from –55°C to 125°C.