LM65645中文资料3V to 65V, 4.5A synchronous step-down converter optimized for power density and low EMI数据手册TI规格书

描述 Description

The LM656x5 are a family of buck converters designed for high efficiency, high-power density, and ultra-low electromagnetic interference (EMI). The converters operate over a wide input voltage range of 3V to 65V (70V transient < 100ms), reducing the need for external input surge protection. The LM656x5 comes with pin selectable fixed output voltages of 3.3V and 5V or in adjustable configuration. The low EMI operation is enabled with minimized loop inductance and optimized switch node slew rate. A pin-selectable ±5% or ±10% dual-random spread spectrum (DRSS) significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low. The current-mode control architecture with a 30ns typical minimum on-time allows high conversion ratios at high frequencies coupled with a fast transient response and excellent load and line regulation.

特性 Features

• Wide input voltage range: 3V to 65V (70V transient
• Facilitates CISPR 11 class B compliance
• Enhanced HotRod™ QFN package with symmetrical pinout
• Pin-configurable AUTO or FPWM operation
• Low minimum on time: 40ns (maximum)
• High-efficiency power conversion at all loads
• 2.5µA switching input current at no load
• High power density
• Pin compatible with 36V 4/6/8A LM654x0-Q1
• Create a custom design using the LM656x5 with the WEBENCH Power Designer