TI TPS65580 4.5V至18V三通道同步降压转换器参考设计方案

TI公司的TPS65580是一款先进三端输出 D-CAP2™模式同步降压转换器芯片，该芯片使系统设计工程师在完成为多种终端设备提供电源稳压器时，提供具有成本效益、低器件数量、低待机电流的解决方案。TPS65580芯片主控回路采用D-CAP2™模式控制，使得在没有外部补偿器件的情况下，提供高效快速的瞬态响应。本文首先介绍芯片的简介、特性、内部框图及应用领域，并给出相应设计方案的设计原理图及元器件列表。
The TPS65580 is a triple, advanced D-CAP2™ mode synchronous buck converter. The TPS65580 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS65580 uses the advanced D-CAP2™ mode control which provides a fast transient response with no external compensation components. The TPS65580 is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V.
The TPS65580 is available in 4.4mm × 6.5mm 20 pin TSSOP (PWP) package, and is specified from –40°C to 85°C ambient temperature range.
TPS65580主要特性：
Advanced D-CAP2 Control Mode
Fast Transient Response
No External Parts Required For Loop Compensation
Compatible with Ceramic Output Capacitors
Wide Input Voltage Range : 4.5 V to 18 V
Output Voltage Range: 0.76 V to 7.0 V
Highly Efficient Integrated FETs Optimized for Low Duty Cycle Applications
160 mΩ (High Side) and 130 mΩ (Low Side) for 2.5A
250mΩ (High Side) and 230mΩ (Low Side) for 1.5A
High Initial Reference Accuracy
Low-Side RDS(on) Loss-Less Current Sensing
Fixed 1.2 ms Soft Start
Non-Sinking Pre-Biased Soft Start
700 kHz Switching Frequency
Cycle-by-Cycle Over-Current Limiting Control
OCL, OVP, UVP, UVLO, TSD Protections
Hiccup Timer for Over Load Protection
PowerGo...