參數(shù)資料
型號(hào)： PM6641
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, QCC48
封裝： 7 X 7 MM, 1 MM HEIGHT, LEAD FREE, VQFP-48
文件頁(yè)數(shù)： 11/47頁(yè)
文件大小： 2254K
代理商： PM6641
PM6641
Device description
Doc ID 13510 Rev 3
19/47
7
Device description
The PM6641 is an integrated voltage regulator module designed to supply DDR2/3 memory
and chipset I/O in real estate constrained portable equipment and ultra-mobile PCs. The
device consists of three buck regulators (two for chipset supply and one for main DDR
supply), a low drop-out (LDO) linear regulator capable of ±2 Apk (DDR termination voltage)
and a low noise buffered reference (DDR input buffer reference). It has been developed for
single-series Li-Ion battery stack powered equipment, allowing an input power supply from
2.7 V up to 5.5 V.
The PM6641 provides a compact solution by integrating DDR and chipset voltage regulators
on a single IC with internal power MOSFETs and requiring a minimum number of external
components. All its buck regulators are based on a current-mode control scheme with
integrated features to guarantee stability and fast load transient response. Each regulator
output voltage can be adjusted or a pre-fixed output voltage can be chosen, if external
components are unwanted. Each switching regulator has independent programmable soft-
start, to reduce inrush current, and output soft-end, to avoid inductor and MOSFETs high
peak current.
Other buck regulators features include output over-voltage and under-voltage protections,
programmable current limit and output Power Good signals high efficiency is achieved over
a wide range of load conditions by using a pulse-skipping technique at light load.
The PM6641 can detect the AVCC pin under-voltage through the under-voltage lock-out
(UVLO) block and it is able to limit its internal temperature through its auto-recovery thermal
shutdown.
The switching frequency of the buck controllers can be set in the range 500 kHz-1 MHz with
an external resistor or can be set equal to 750 kHz without external components use. All
buck regulators work at the same switching frequency with selectable phase shift.
The regulators can support both electrolytic and ceramic output capacitors because no
minimum output voltage ripple is required for stability purposes.
The PM6641 is provided in a QFN7x7 mm 48-pin lead-free package.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PM6641TR 功能描述:低壓差穩(wěn)壓器 - LDO Monolithic VR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
PM6644 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 350mA adjust SD reg 4.5V to 25V 350mA RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
PM6644TR 功能描述:DC/DC 開(kāi)關(guān)控制器 350 mA adj step-down 4.5 to 25V -40, 150c RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
PM6650 制造商:Qualcomm 功能描述:Electronic Component
PM6652 功能描述:DC/DC 開(kāi)關(guān)控制器 Single Phase CNTR Intel MVP 6.5 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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