- 您现在的位置：买卖IC网 > PDF目录98054 > PM6670STR (STMICROELECTRONICS) 3 A SWITCHING CONTROLLER, QCC24 PDF资料下载
参数资料
| 型号： | PM6670STR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING CONTROLLER, QCC24 |
| 封装： | 4 X 4 MM, LEAD FREE, VFQFPN-24 |
| 文件页数： | 13/54页 |
| 文件大小： | 742K |
| 代理商： | PM6670STR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页
Device description
PM6670S
20/54
Doc ID 14432 Rev 4
7
Device description
The PM6670SS is designed to satisfy DDR2-3 power supply requirements combining a
synchronous buck controller, a 15 mA buffered reference and a high-current low-drop out
(LDO) linear regulator capable of sourcing and sinking up to 2 Apk. The switching controller
section is a high-performance, pseudo-fixed frequency, constant-on-time (COT) based
regulator specifically designed for handling fast load transient over a wide range of input
voltages.
The DDR2-3 supply voltage VDDQ can be easily set to 1.8 V (DDR2) or 1.5 V (DDR3)
without additional components. The output voltage can also be adjusted in the 0.9 V to 2.6 V
range using an external resistor divider. The switching mode power supply (SMPS) can
handle different modes of operation in order to minimize noise or power consumption,
depending on the application needs.
A lossless current sensing scheme, based on the Low-Side MOSFET’s on resistance avoids
the need for an external current sense resistor.
The output of the linear regulator (VTT) tracks the memory’s reference voltage VTTREF
within ±30 mV over the full operating load conditions. The input of the LDO can be either
VDDQ or a lower voltage rail in order to reduce the total power dissipation. Linear regulator
stability is achieved by filtering its output with a ceramic capacitor
(20 μF or greater).
The reference voltage (VTTREF) section provides a voltage equal to one half of VSNS with
an accuracy of 1 %. This regulator can source and sink up to ±15 mA. A 10 nF to 100 nF
bypass capacitor is required between VTTREF and SGND for stability.
According to DDR2/3 JEDEC specifications, when the system enters the suspend-to-RAM
state the LDO output is left in high impedance while VTTREF and VDDQ are still alive.
When the suspend-to-disk state (S3 and S5 tied to ground) is entered, all outputs are
actively discharged when either tracking or non-tracking discharge is selected.
相关PDF资料 |
PDF描述 |
|---|---|
| PM6670S | 3 A SWITCHING CONTROLLER, QCC24 |
| PM6670TR | 1.4 A SWITCHING CONTROLLER, QCC24 |
| PM6670ATR | 1.4 A SWITCHING CONTROLLER, QCC24 |
| PM6670 | 1.4 A SWITCHING CONTROLLER, QCC24 |
| PM6675ASTR | 3 A SWITCHING CONTROLLER, QCC24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PM6670TR | 功能描述:直流/直流开关调节器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| 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 开关控制器 DDR 2/3 Memory Pwr Cntrl RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| PM6675ASTR | 功能描述:低压差控制器 - LDO Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
| PM6675ATR | 功能描述:低压差控制器 - LDO High eff SD CNRL RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
发布紧急采购，3分钟左右您将得到回复。