LM5007 - 9-75V Wide Vin, 500mA Constant On-Time Non-Synchronous Buck Regulator

LM5007 - 9-75V Wide Vin, 500mA Constant On-Time Non-Synchronous Buck Regulator

 

Texas Instruments

 

Description

LM5007 0.5A 강압 스위칭 컨버터는 저렴하고 효율적인 벅 레귤레이터를 구현하는 데 필요한 모든 기능을 갖추고 있습니다. 이 고전압 컨버터는 80V, 0.7A N채널 벅 스위치가 통합되어 있으며 9V ~ 75V의 입력 전압 범위에서 작동합니다.
이 장치는 구현하기 쉽고 8핀 VSSOP 및 열 성능이 향상된 8핀 WSON 패키지로 제공됩니다.

컨버터는 VIN에 반비례하는 PWM 온타임을 갖는 히스테리시스 제어 방식을 사용합니다. 이 기능을 사용하면 작동 주파수가 부하 및 입력 전압 변동에 따라 비교적 일정하게 유지됩니다. 히스테리시스 제어는 루프 보상이 필요하지 않으며 빠른 과도 응답을 제공합니다. 지능형 전류 제한은 VOUT에 반비례하는 강제 오프 타임으로 구현됩니다. 이 전류 제한 방식은 감소된 부하 전류 폴드백을 제공하면서 단락 보호를 보장합니다. 다른 보호 기능으로는 자동 복구를 통한 열 차단, VCC 및 게이트 드라이브 저전압 잠금, 최대 듀티 사이클 제한기가 있습니다.

 

Features

• Versatile Synchronous Buck DC/DC Converter
  - Operating Input Voltage Range of 9 V to 75 V
  - Integrated 80-V, 0.7-A N-Channel Buck Switch
  - Internal High-Voltage VCC Regulator
  - Adjustable Output Voltage
  - High Efficiency Operation
• Adaptive Constant On-Time Control Architecture
  - Ultra-Fast Transient Response
  - No Control Loop Compensation Required
• Nearly Constant Switching Frequency
  - PWM On-Time Varies Inversely with Input Voltage
• Precision 2.5-V Reference
• Low Input Quiescent Current
• Inherent Protection Features for Robust Design
  - Intelligent Current Limit Protection
  - VCC and Gate Drive UVLO Protection
  - Thermal Shutdown Protection With Hysteresis
  - External Shutdown Control
• 8-Pin VSSOP and WSON Packages
• Create a Custom Regulator Design Using WEBENCH® Power Designer