參數(shù)資料
型號： PM6670
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 1.4 A SWITCHING CONTROLLER, QCC24
封裝： 4 X 4 MM, LEAD FREE, VFQFN-24
文件頁數(shù)： 22/53頁
文件大?。?/td> 799K
代理商： PM6670
Obsolete
Product(s)
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Product(s)
PM6670
Device description
29/53
7.1.4
Mode-of-operation selection
Figure 35. MODE and DDRSEL multifunction pin configurations
The PM6670 has been designed to satisfy the widest range of applications involving
DDR2/3 memories, SSTL15-18 buses termination and I/O supplies for CPU/Chipset. The
device is provided with multilevel pins which allow the user to choose the appropriate
configuration. The MODE pin is used to firstly decide between fixed preset or adjustable
(user defined) output voltages.
When the MODE pin is connected to +5V, the PM6670 allows setting the VDDQ voltage to
1.8V or 1.5V just forcing the DDRSEL multilevel pin to +5V or to ground respectively (see
a).
In this condition the Pulse-Skip feature is enabled. This device configuration is suitable for
standard DDR2/3 memory supply applications avoiding the need for an external, high
accuracy, divider for output voltage setting.
Applications requiring different output voltages can be managed by PM6670 simply setting
the adjustable mode. If MODE pin voltage is higher than 4V, the fixed output mode is
selected. Connecting an external divider to the MODE pin (Figure 35b), it is used as
negative input of the error amplifier and the output voltage is given by expression (21).
Equation 21
PM6670
DDRSEL
MODE
R9
R8
VDDQ
+5V
VREF
PM6670
DDRSEL
MODE
R9
R8
VDDQ
+5V
(a)
(b)
PM6670
DDRSEL
MODE
R9
R8
VDDQ
+5V
VREF
PM6670
DDRSEL
MODE
R9
R8
VDDQ
+5V
(a)
(b)
8
R
9
R
8
R
9
.
0
VDDQ
ADJ
+
=
相關PDF資料
PDF描述
PM6675ASTR 3 A SWITCHING CONTROLLER, QCC24
PM6675AS 3 A SWITCHING CONTROLLER, QCC24
PM6675ATR SWITCHING CONTROLLER, QCC24
PM6675TR SWITCHING CONTROLLER, QCC24
PM6675 SWITCHING CONTROLLER, QCC24
相關代理商/技術參數(shù)
參數(shù)描述
PM6670AS 功能描述:DC/DC 開關控制器 DDR 2/3 Memory Pwr Cntrl RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
PM6670ASTR 功能描述:直流/直流開關調節(jié)器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
PM6670ATR 功能描述:直流/直流開關調節(jié)器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
PM6670S 功能描述:DC/DC 開關控制器 DDR 2/3 Memory Pwr Cntrl RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
PM6670STR 功能描述:DC/DC 開關控制器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
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