Серия DC-DC интегральных преобразователей RT7275

Richtek

Общие характеристики

 Раздел DC-DC преобразователи интегральные
Максимальный выходной ток
Частота преобразования
Встроенные возможности
Рабочая температура

Документация на серию RT7275

Reference Design Sample & Buy Design Tools ® RT7275/76 3A, 18V, 700kHz ACOTTM Synchronous Step-Down Converter General Description Features The RT7275/76 are high-performance 700kHz 3A stepdown regulators with internal power switches and synchronous rectifiers. They feature quick transient response using their Advanced Constant On-Time (ACOT TM) control architecture that provides stable operation with small ceramic output capacitors and without complicated external compensation, among other benefits. The input voltage range is from 4.5V to 18V and the output is adjustable from 0.765V to 8V. z The proprietary ACOTTM control improves upon other fastresponse constant on-time architectures, achieving nearly constant switching frequency over line, load, and output voltage ranges. Since there is no internal clock, response to transients is nearly instantaneous and inductor current can ramp quickly to maintain output regulation without large bulk output capacitance. The RT7275/76 are stable with and optimized for ceramic output capacitors. z z z z z z z z z z z With internal 90mΩ switches and 60mΩ synchronous rectifiers, the RT7275/76 display excellent efficiency and good behavior across a range of applications, especially for low output voltages and low duty cycles. Cycle-bycycle current limit, input under-voltage lock-out, externally-adjustable soft-start, output under- and overvoltage protection, and thermal shutdown provide safe and smooth operation in all operating conditions. The RT7275 and RT7276 are each available in WDFN-10L 3x3 and PTSSOP-14 packages, with exposed thermal pads. Fast Transient Response Steady 700kHz Switching Frequency ` At all Load Currents (RT7275) ` Discontinuous Operating Mode at Light Load (RT7276) 3A Output Current Advanced Constant On-Time (ACOTTM) Control Optimized for Ceramic Output Capacitors 4.5V to 18V Input Voltage Range Internal 90mΩ Ω Switch and 60mΩ Ω Synchronous Rectifier 0.765V to 8V Adjustable Output Voltage Externally-Adjustable, Pre-Biased Compatible SoftStart Cycle-by-Cycle Current Limit Optional Output Discharge Function (PTSSOP-14 Only) Output Over- and Under-Voltage Shut-Down Applications z z z z z z Industrial and Commercial Low Power Systems Computer Peripherals LCD Monitors and TVs Green Electronics/Appliances Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs Not Recommended for Sink/Source Applications Fast-Transient Response RT7275 Simplified Application Circuit VIN Input Signal Power Good RT7275/76 VIN SW VINR EN VOUT (20mV/Div) VOUT BOOT FB PGOOD VOUT PVCC SS PGND GND IOUT (2A/Div) VIN = 12V, VOUT = 1.05V, IOUT = 0 to 3A Time (100µs/Div) Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS7275/76-05 February 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 PDF
Документация на RT7275GQW 

3A, 18V, 700kHz ACOT™ Synchronous Step-Down Converter The RT7275/76 are high-performance 700kHz 3A step-down regulators with internal ,power switches and synchronous rectifiers. They feature quick transient ,response using their Advanced...

Дата модификации: 04.10.2018

Размер: 363.4 Кб

24 стр.

    Товары серии RT7275

    Наименование i Упаковка Корпус
    RT7275GCP (RICHTEK)
     
     
    		 TSSOP-14
    RT7275GQW (RICHTEK)
     
     
    		 UDFN10