參數(shù)資料
型號： L6714
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64
封裝： 10 X 10 MM, LEAD FREE, TQFP-64
文件頁數(shù)： 31/70頁
文件大小： 694K
代理商： L6714
L6714
Voltage positioning
37/70
12.1
Droop function (Optional)
This method "recovers" part of the drop due to the output capacitor ESR in the load
transient, introducing a dependence of the output voltage on the load current: a static error
proportional to the output current causes the output voltage to vary according to the sensed
current.
As shown in Figure 11, the ESR drop is present in any case, but using the droop function
the total deviation of the output voltage is minimized. Moreover, more and more high-
performance CPUs require precise load-line regulation to perform in the proper way.
DROOP function is not then required only to optimize the output filter, but also beacomes a
requirement of the load.
Connecting DROOP pin and FB pin together, the device forces a current IDROOP,
proportional to the read current, into the feedback resistor RFB implementing the load
regulation dependence. Since IDROOP depends on the current information about the three
phases, the output characteristic vs. load current is then given by:
Where RSENSE is the chosen sensing element resistance (Inductor DCR or LS RdsON) and
IOUT is the output current of the system.
The whole power supply can be then represented by a "real" voltage generator with an
equivalent output resistance RDROOP and a voltage value of VREF. RFB resistor can be also
designed according to the RDROOP specifications as follow:
Droop function is optional, in case it is not desired, the DROOP pin can be disconnected
from the FB and an information about the total delivered current becomes available for
debugging, and/or current monitoring. When not used, the pin can be shorted to SGND.
Figure 11. Voltage positioning (left) and droop function (right)
V
OUT
V
REF
R
FB
I
DROOP
–
V
REF
R
FB
R
SENSE
Rg
---------------------
I
OUT
–
V
REF
R
DROOP
I
OUT
–
==
=
R
FB
R
DROOP
Rg
R
SENSE
---------------------
=
I DR
OOP
VREF
FB
COMP
I OFFSET
VSEN
64k
FBR
FBG
64k
RF
CF
RFB
To Vcore
(Remote Sense)
ESR Drop
VMAX
VMIN
VNOM
RESPONSE WITHOUT DROOP
RESPONSE WITH DROOP
DROOP
相關PDF資料
PDF描述
L6725TR 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6728ATR SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10
L6728A SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10
L6728D 30 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO10
L6911C 1.3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
相關代理商/技術參數(shù)
參數(shù)描述
L6714TR 功能描述:功率驅動器IC 4 Phase Controller RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6716 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Quad-OUT Sync Step Down 48-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:2/3/4 Phase Controlr Embedded Driver
L6716TR 功能描述:開關變換器、穩(wěn)壓器與控制器 2/3/4 phase CNTRL Embedded Drivers 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
L6717 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN 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
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
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