Серия DC-DC интегральных преобразователей RT7280

Richtek

Общие характеристики

 Раздел DC-DC преобразователи интегральные
Корпус TSSOP-14
Встроенные возможности

Документация на серию RT7280

Reference Design Sample & Buy Design Tools ® RT7274/79/80/81 2A, 18V, 700kHz ACOTTM Synchronous Step-Down Converter General Description Features The RT7274/79/80/81 is a synchronous step-down DC/ DC converter with Advanced Constant On-Time (ACOTTM) mode control. It achieves high power density to deliver up to 2A output current from a 4.5V to 18V input supply. The proprietary ACOTTM mode offers an optimal transient response over a wide range of loads and all kinds of ceramic capacitors, which allows the device to adopt very low ESR output capacitor for ensuring performance stabilization. In addition, RT7274/79/80/81 keeps an excellent constant switching frequency under line and load variation and the integrated synchronous power switches with the ACOTTM mode operation provides high efficiency in whole output current load range. Cycle-by-cycle current limit provides an accurate protection by a valley detection of low-side MOSFET and external soft-start setting eliminates input current surge during startup. Protection functions include thermal shutdown for RT7274/79/80/81; output under voltage protection and output over voltage protection for RT7279/80 only. z z z z z z z z z z z z z z ACOTTM Mode Enables Fast Transient Response 4.5V to 18V Input Voltage Range 2A Output Current High Efficient Internal N-MOSFET Optimized for Lower Duty Cycle Applications 105mΩ Ω Internal Low-Side N-MOSFET Advanced Constant On-Time Control Allows Ceramic Output Capacitor 700kHz Switching Frequency Adjustable Output Voltage from 0.765V to 8V Adjustable and Pre-biased Soft-Start Cycle-by-Cycle Current Limit Input Under Voltage Lockout Thermal Shutdown RoHS Compliant and Halogen Free Applications 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 Simplified Application Circuit VIN RT7274/79/80/81 VIN SW VINR* Input Signal Power Good EN VOUT BOOT FB GND* PGOOD* PVCC SS VOUT* PGND* * : VINR pin for TSSOP-14 (Exposed Pad) only. VOUT pin for TSSOP-14 (Exposed Pad) only. PGND pin for TSSOP-14 (Exposed Pad) and WDFN-10L 3x3 only. PGOOD pin for TSSOP-14 (Exposed Pad) and WDFN-10L 3x3 only. GND pin for TSSOP-14 (Exposed Pad) and SOP-8 (Exposed Pad) only. Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS7274/79/80/81-04 February 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 PDF
Документация на RT7281GSP 

2A, 18V, 700kHz ACOT™ Synchronous Step-Down Converter The RT7274/79/80/81 is a synchronous step-down DC/DC converter with Advanced ,Constant On-Time (ACOTTM) mode control. It achieves high power density to ,deliver up to 2A output curren...

Дата модификации: 04.10.2018

Размер: 396.9 Кб

24 стр.

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