參數(shù)資料
型號(hào)： 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(yè)數(shù)： 14/56頁(yè)
文件大小： 1081K
代理商： L6717
L6717
Hybrid CPU support and CPU_TYPE detection
Doc ID 17326 Rev 1
21/56
5.3
SVI - serial interface
SVI is a two wire, clock and data, bus that connects a single master (CPU) to one slave
(L6717). The master initiates and terminates SVI transactions and drives the clock, SVC,
and the data, SVD, during a transaction. The slave receives the SVI transactions and acts
accordingly. SVI wire protocol is based on fast-mode I2C.
SVI interface also considers two additional signal needed to manage the system start-up.
These signals are EN and PWROK. The device return a PWRGOOD signal if the output
voltages are in regulation.
5.4
SVI start-up
Once the SVI mode has been detected on the EN rising-edge, L6717 checks for the status
of the two serial VID pins, SVC and SVD, and stores this value as the Pre-PWROK Metal
VID. The controller initiate a soft-start phase regulating both CORE and NB voltage planes
to the voltage level prescribed by the Pre-PWROK Metal VID. See Table 7 for details about
Pre-PWROK Metal VID codifications. The stored Pre-PWROK Metal VID value are re-used
in any case of PWROK de-assertion.
After bringing the output rails into regulation, the controller asserts the PWRGOOD signal
and waits for PWROK to be asserted. Until PWROK is asserted, the controller regulates to
the Pre-PWROK Metal VID ignoring any commands coming from the SVI interface.
After PWROK is asserted, the processor has initialized the serial VID interface and L6717
waits for commands from the CPU to move the voltage planes from the Pre-PWROK Metal
VID values to the operative VID values. As long as PWROK remains asserted, the controller
will react to any command issued through the SVI interface according to SVI protocol.
See Section 7.8 for details about Soft-Start.
Table 7.
V_FIX mode and Pre-PWROK MetalVID
5.4.1
Set VID command
The set VID command is defined as the command sequence that the CPU issues on the SVI
bus to modify the voltage level of the CORE section and/or the NB section.
During a set VID command, the processor sends the start (START) sequence followed by
the address of the section which the set VID command applies. The processor then sends
the write (WRITE) bit. After the write bit, the voltage regulator (VR) sends the acknowledge
(ACK) bit. The processor then sends the VID bits code during the data phase. The VR
sends the acknowledge (ACK) bit after the data phase. Finally, the processor sends the stop
(STOP) sequence. After the VR has detected the stop, it performs an on-the-fly VID
SVC
SVD
Output voltage [V]
Pre-PWROK metal VID
V_FIX mode
0
1.1V
1.4V
0
1
1.0V
1.2V
1
0
0.9V
1.0V
1
0.8V
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相關(guān)代理商/技術(shù)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(guān)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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)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(fēng)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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