描述 Description

The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteristics over the industry-standard SG1526. A direct pin-for-pin replacement for the earlier device with all its features, it incorporates the following enhancements: a bandgap reference circuit for improved regulation and drift characteristics, improved under voltage lockout, lower temperature coefficients on oscillator frequency and current-sense threshold, tighter tolerance on soft start time, much faster SHUTDOWN response, improved double-pulse suppression logic for higher speed operation, and an improved output driver design with low shoot-through current, and faster rise and fall times. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformer-less and transformer-coupled. The SG1526B is specified for operation over the full military ambient temperature range of -55°C to 150°C.The SG2526B is characterized for the industrial range of -25°C to 150°C, and the SG3526B is designed for the commercial range of 0°C to 125°C.

特性 Features

8V to 35V Operation
5V Reference Trimmed to ±1%
1Hz to 350kHz Oscillator Range
Dual 100mA Source/Sink Outputs
Digital Current Limiting
Double Pulse Suppression
Programmable Deadtime
Undervoltage Lockout
Single Pulse Metering
Programmable Soft-start
Wide Current Limit Common Mode
Range TTL/CMOS Compatible Logic
Ports Symmetry Correction Capability Guaranteed 6 Unit Synchronization

簡介

SG3526B屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由制造生產的SG3526BDC-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。