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| 型号： | L6717 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48 |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFPN-48 |
| 文件页数： | 17/56页 |
| 文件大小： | 1081K |
| 代理商： | L6717 |
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Hybrid CPU support and CPU_TYPE detection
L6717
24/56
Doc ID 17326 Rev 1
5.4.2
PWROK de-assertion
Anytime PWROK de-asserts, while EN is asserted, the controller uses the previously stored
Pre-PWROK Metal VID and sets both CORE and NB planes voltage to the corresponding
level performing an on-the-fly VID transition.
Anytime the PWROK is de-asserted the PWRGOOD is tied low; after being pulled low the
PWRGOOD is treated appropriately and kept de-asserted until the output voltage of both
CORE and NB sections is within the PWRGOOD validity window referred to Pre-PWROK
Metal VID.
5.4.3
PSI_L and efficiency optimization at light-load
PSI_L is an active-low flag (i.e. low logic level when asserted) that can be set by the CPU to
allow the VR to enter power-saving mode to maximize the system efficiency when in light-
load conditions. The status of the flag is communicated to the controller through the SVI
bus.
When the PSI_L flag is asserted by the CPU through the SVI bus, the device adjusts the
phase number according to the programmed strategy. Default PSI_L strategy consists in
working in single phase. PSI_L strategy can be disabled as well as re-configured through
When CPU issues PSI_L flag, L6717 adjusts phase number according to the selected
PSI_L strategy: the device sets HiZ on the related phases and re-configures internal phase-
shift to maintain the correct interleaving among active phases. Furthermore, the internal
current-sharing is adjusted considering the phase number reduction.
When PSI_L is de-asserted, the device will return to the original configuration.
Start-up is performed with all the configured phases enabled.
When PSI_L is active L6717 performs on-the-fly VID transitions with all the programmed
phases.
NB section is not impacted by PSI_L status change.
Figure 7 shows an example of the efficiency improvement that can be achieved by enabling
the PSI management.
Figure 7.
System efficiency enhancement by PSI
1 PHASE
4 PHASE
1 PHASE
4 PHASE
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| L6728TR | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6717A | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717ATR | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller T/R 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Tape and Reel 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717TR | 功能描述:开关变换器、稳压器与控制器 High-Efficienc AM2r2 Hybrid Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6718TR | 功能描述:其他电源管理 Multiphase Dual PWM VR12 25MHz LTB RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| L6720 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
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