參數(shù)資料
型號(hào)： PM6670TR
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)： 22/55頁
文件大?。?/td> 849K
代理商： PM6670TR
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(guān)PDF資料
PDF描述
PM6670ATR 1.4 A SWITCHING CONTROLLER, QCC24
PM6670 1.4 A SWITCHING CONTROLLER, QCC24
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PM6675AS 3 A SWITCHING CONTROLLER, QCC24
PM6675ATR SWITCHING CONTROLLER, QCC24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PM6675 制造商:STMicroelectronics 功能描述: 制造商:STMicroelectronics 功能描述:LDO CNTRLR STDN 0.6V TO 3.3V/1.5V 24PIN VFQFPN - Rail/Tube
PM6675AS 功能描述:DC/DC 開關(guān)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(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
PM6675ASTR 功能描述:低壓差控制器 - LDO Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6
PM6675ATR 功能描述:低壓差控制器 - LDO High eff SD CNRL RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6
PM6675S 功能描述:DC/DC 開關(guān)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(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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