LT3757A屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由亞德諾半導體技術有限公司制造生產的LT3757ADC-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。其他拓撲結構可能包括：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。

DESCRIPTION

The LT?8301 is a micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start further reduce external component count. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 1.2A, 65V DMOS power switch is integrated along with all high voltage circuitry and control logic into a 5-lead ThinSOT? package.

FEATURES

■ 2.7V to 42V Input Voltage Range

■ 1.2A, 65V Internal DMOS Power Switch

■ Low Quiescent Current:

■ 100μA in Sleep Mode

■ 350μA in Active Mode

■ Boundary Mode Operation at Heavy Load

■ Low-Ripple Burst Mode? Operation at Light Load

■ Minimum Load <0.5 (Typ) of Full Output

■ VOUT Set with a Single External Resistor

■ No Transformer Third Winding or Opto-Isolator Required for Regulation

■ Accurate EN/UVLO Threshold and Hysteresis

■ Internal Compensation and Soft-Start

■ Output Short-Circuit Protection

■ 5-Lead TSOT-23 Package

■ AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

■ Isolated Telecom, Automotive, Industrial, Medical Power Supplies

■ Isolated Auxiliary/Housekeeping Power Supplies