描述 Description

The device is a flexible high performance PWM buck controller dedicated for low voltage distributed DC-DC. The input voltage can range from 1.8V to 18V, while the supply voltage can range from 4.5V to 18V. The output voltage is adjustable down to 0.6V.
High peak current gate drivers provide for fast switching to the external power section, and the output current can be in excess of 20A. The device is capable to manage minimum on-times (TON) shorter than 100ns making possible conversions with very low duty cycle and very high switching frequency. In order to guarantee a real overcurrent protection, also with very narrow TON, the current sense is realized both on the high-side and low-side MOSFETs. When necessary, two different current limit protections can be externally set through an external resistor. The device can sink current after the soft-start phase while, during the soft-start, the sink mode capability is disabled in order to allow a proper start-up also in pre-biased output voltage conditions. Other features are over-voltage-protection and thermal shutdown.

特性 Features

Predictive anti-cross conduction control
High current embedded drivers
Sink current capability
Programmable high-side and low-side R
DS(on) sense over-current-protection
Pre-bias start up capability
Selectable switching frequency 250KHz/500KHz
Thermal shut-down
Over voltage protection
Package: SO16N
Soft-start and inhibit
External input voltage reference
Input voltage range from 1.8V to 18V
Adjustable output voltage down to 0.6V with ±0.8% accuracy over line voltage and temperature (0?C~125?C)
Supply voltage range from 4.5V to 18V
0% to 100% duty cycle
Bootstrap anti-discharging system
Fixed frequency voltage mode control

簡介

L6725屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由制造生產(chǎn)的L6725DC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓?fù)浣Y(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。