PM6681ATR集成電路（IC）的線性穩(wěn)壓器控制器規(guī)格書PDF中文資料

PM6681ATR屬于集成電路（IC）的線性穩(wěn)壓器控制器。由意法半導體集團制造生產(chǎn)的PM6681ATR穩(wěn)壓器 - 線性 + 開關此產(chǎn)品族中的產(chǎn)品用于構建執(zhí)行 DC-DC 轉換或電壓調(diào)節(jié)功能的電路，采用的是開關模式和線性穩(wěn)壓器功能的組合。雖然具體的拓撲各不相同，但此類產(chǎn)品的主要目的是將開關模式技術的效率優(yōu)勢與線性穩(wěn)壓技術的低噪聲特性結合在一起。

Description

PM6681A is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with lossless current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. An embedded integrator control loop compensates the DC voltage error due to the output ripple. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33 kHz is selectable to avoid audio noise issues. The PM6681A provides a selectable switching frequency, allowing three different values of switching frequencies for the two switching sections. The output voltages OUT1 and OUT2 can be adjusted from 0.9 V to 5 V and from 0.9 V to 3.3 V respectively. The device provides also 2 LDOs, 5 V fixed and 0.9 V - 3.3 V adjustable.

Features

■ 6 V to 36 V input voltage range

■ Adjustable output voltages

■ 0.9 - 3.3 V LDO adjustable delivers 100 mA peak current

■ 5 V LDO delivers 100 mA peak current

■ 1.237 V ±1 reference voltage available

■ No RSENSE current sensing using low side MOSFETs RDS(on)

■ Negative current limit

■ Soft-start internally fixed at 2 ms

■ Soft output discharge

■ Latched UVP

■ Not-latched OVP

■ Selectable pulse skipping at light loads

■ Selectable minimum frequency (33 kHz) in pulse skip mode

■ 5 mW maximum quiescent power

■ Independent Power Good signals

■ Output voltage ripple compensation

Applications

■ Embedded computer system

■ FPGA system power

■ Industrial applications on 24 V

■ High performance and high density DC-DC modules

■ Notebook computer