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Analog Devices / Maxim Integrated MAX25262/MAX25263車用微型降壓轉(zhuǎn)換器數(shù)據(jù)手冊

科技觀察員 ? 2025-06-22 14:12 ? 次閱讀
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Analog Devices MAX25262/MAX25263車用2A/3A微型降壓轉(zhuǎn)換器提供高達(dá)2A/3A電流的集成高側(cè)和低側(cè)開關(guān)。MAX25262/MAX25263在3.5V至65V的輸入范圍內(nèi)工作,而在無負(fù)載時(shí)僅使用3.5μA的靜態(tài)電流。這些轉(zhuǎn)換器包括20ns最小導(dǎo)通時(shí)間的小能力,支持在單級中進(jìn)行大的降壓轉(zhuǎn)換,而不會(huì)跳過周期。98%的最大占空因數(shù)和低高側(cè)FET導(dǎo)通電阻允許低輸入電壓應(yīng)用的低壓差運(yùn)行。Analog Devices MAX25262/MAX25263微型降壓轉(zhuǎn)換器通過觀察PGOOD信號來監(jiān)測電壓質(zhì)量,并提供兩個(gè)固定的5V和3.3V輸出電壓。此外,使用外部電阻分壓器,可將該器件配置為1V至20V的輸出電壓。

數(shù)據(jù)手冊:*附件:Analog Devices , Maxim Integrated MAX25262,MAX25263車用微型降壓轉(zhuǎn)換器數(shù)據(jù)手冊.pdf

MAX25262/MAX25263頻率在內(nèi)部固定在2.1MHz,允許較小的外部組件,減少輸出紋波,并保證沒有AM干擾。400kHz選項(xiàng)可實(shí)現(xiàn)最小開關(guān)損耗和最大效率。當(dāng)FSYNC被拉低時(shí),該IC在輕負(fù)載時(shí)進(jìn)入跳躍模式,以實(shí)現(xiàn)輕負(fù)載的高效率。引腳可選強(qiáng)制脈寬調(diào)制(PWM)模式也可用于EMI關(guān)鍵型應(yīng)用。該IC采用對稱倒裝芯片封裝,可提供卓越的EMI性能。此外,引腳可選擴(kuò)頻有助于增強(qiáng)EMI性能。

特性

  • 符合嚴(yán)格的原始設(shè)備制造商(OEM)模塊功耗和性能規(guī)范
    • 輸出電流能力:2A/3A
    • 供電電流:3.5μA(待機(jī)模式)
  • EMI降低功能可在不犧牲寬輸入電壓范圍的情況下降低對敏感無線電頻段的干擾
    • 20ns(典型值)最短導(dǎo)通時(shí)間可保證3.3V輸出2.1MHz和24V輸入時(shí)無跳躍運(yùn)行
    • 擴(kuò)頻選項(xiàng)
    • 鎖相環(huán)(PLL)頻率同步
  • 支持雙電池運(yùn)行
    • 3.5V至65V的寬輸入電源范圍
    • 編程1V至20V輸出電壓
    • 提供固定5V/3.3V/12V選項(xiàng)
  • 保護(hù)功能提升了系統(tǒng)可靠性
    • PGOOD輸出和高壓EN輸入簡化了電源排序
    • 欠壓閉鎖
    • 過熱和短路保護(hù)
    • 符合AEC-Q100標(biāo)準(zhǔn)

應(yīng)用

  • 雙電池汽車系統(tǒng)
  • 汽車儀器組
  • 分布式直流電源系統(tǒng)
  • 導(dǎo)航與無線電主機(jī)

簡化框圖

1.png

功能圖

2.png

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