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參數(shù)資料
| 型號： | L6717 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFPN-48 |
| 文件頁數(shù)： | 17/56頁 |
| 文件大?。?/td> | 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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相關代理商/技術參數(shù) |
參數(shù)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:開關變換器、穩(wěn)壓器與控制器 High-Efficienc AM2r2 Hybrid Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6718TR | 功能描述:其他電源管理 Multiphase Dual PWM VR12 25MHz LTB RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| L6720 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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