參數(shù)資料
型號(hào)： L6716
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48
封裝： 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFP-48
文件頁(yè)數(shù)： 20/57頁(yè)
文件大小： 829K
代理商： L6716
L6716
Voltage positioning
Doc ID 14521 Rev 3
27/57
where:
Offset resistor can be designed by considering the following relationship (RFB is fixed by the
Droop effect):
Offset automatically given by the DAC selection differs from the offset implemented through
the OFFSET pin: the built-in feature is trimmed in production and assures ±0.5% error over
load and line variations.
Figure 12.
Voltage positioning with positive offset
11.2
Droop function
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 becomes a
requirement of the load.
The device forces a current IDROOP, proportional to the read current, into the feedback RFB
resistor implementing the load regulation dependence. Since IDROOP depends on the
current information about the N phases, the output characteristic vs. load current is then
given by (neglecting the OFFSET voltage term):
Where DCR is the inductor parasitic resistance (or sense resistor when used) 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
VPROG. RFB resistor can be also designed according to the RDROOP specifications as follow:
V
OS
R
FB
1.240V
R
OFFSET
------------------------
=
R
OFFSET
R
FB
1.240V
V
OS
-------------------
=
COMP
To GND_core
(Remote Sense)
ERROR AMPLIFIER
FB
FBG
RF
CF
VSEN
I
DROOP
To VCC_core
(Remote Sense)
RFB
VPROG
VREF
FBG
GND DROP
RECOVERY
CP
I
OFFSET
1.240V
ROFFSET
OFFSET
I OFFSET
V
OUT
V
PROG
R
FB
I
DROOP
–
V
REF
R
FB
DCR
Rg
------------- I
OUT
–
V
PROG
R
DROOP
I
OUT
–
==
=
R
FB
R
DROOP
Rg
DCR
-------------
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6716TR 功能描述:開關(guān)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(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
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
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
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