参数资料
| 型号： | ISL6566ACRZ-T |
| 厂商： | Intersil |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM 3PHASE BUCK 40-QFN |
| 标准包装： | 4,000 |
| 应用： | 控制器，Intel VRM9，VRM10，AMD Hammer 应用 |
| 输入电压： | 3 V ~ 12 V |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 1.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | * |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | * |
| 包装： | 带卷 (TR) |
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ISL6566A
TABLE 4. VRM10 VOLTAGE IDENTIFICATION CODES (Continued)
The ISL6566A incorporates an internal differential remote-
VID4
1
1
1
0
0
0
0
0
0
0
0
0
0
0
VID3
0
0
0
1
1
1
1
1
1
1
1
1
1
1
VID2
0
0
0
1
1
1
1
1
1
1
1
0
0
0
VID1
0
0
0
1
1
1
1
0
0
0
0
1
1
1
VID0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
VID12.5
0
1
0
1
0
1
0
1
0
1
0
1
0
1
VDAC
1.4375
1.4500
1.4625
1.4750
1.4875
1.5000
1.5125
1.5250
1.5375
1.5500
1.5625
1.5750
1.5875
1.6000
sense amplifier in the feedback path. The amplifier removes
the voltage error encountered when measuring the output
voltage relative to the controller ground reference point,
resulting in a more accurate means of sensing output
voltage. Connect the microprocessor sense pins to the non-
inverting input, VSEN, and inverting input, RGND, of the
remote-sense amplifier. The droop voltage, V DROOP , also
feeds into the remote-sense amplifier. The remote-sense
output, V DIFF , is therefore equal to the sum of the output
voltage, V OUT , and the droop voltage. V DIFF is connected to
the inverting input of the error amplifier through an external
resistor.
The output of the error amplifier, V COMP , is compared to the
sawtooth waveform to generate the PWM signals. The PWM
signals control the timing of the Internal MOSFET drivers
and regulate the converter output so that the voltage at FB is
equal to the voltage at REF. This will regulate the output
voltage to be equal to Equation 4. The internal and external
circuitry that controls voltage regulation is illustrated in
Figure 6.
Voltage Regulation
In order to regulate the output voltage to a specified level,
V OUT = V REF – V OFS – V DROOP
(EQ. 4)
R C C C
the ISL6566A uses the integrating compensation network
shown in Figure 6. This compensation network insures that
the steady-state error in the output voltage is limited only to
the error in the reference voltage (output of the DAC) and
offset errors in the OFS current source, remote-sense and
error amplifiers. Intersil specifies the guaranteed tolerance of
the ISL6566A to include the combined tolerances of each of
these elements.
EXTERNAL CIRCUIT ISL6566A INTERNAL CIRCUIT
COMP
VID DAC
Load-Line (Droop) Regulation
Some microprocessor manufacturers require a precisely-
controlled output impedance. This dependence of output
voltage on load current is often termed “droop” or “load line”
regulation.
As shown in Figure 6, a voltage, V DROOP , proportional to the
total current in all active channels, I OUT , feeds into the
differential remote-sense amplifier. The resulting voltage at
the output of the remote-sense amplifier is the sum of the
output voltage and the droop voltage. As Equation 4 shows,
feeding this voltage into the compensation network causes
REF
1k
the regulator to adjust the output voltage so that it’s equal to
the reference voltage minus the droop voltage.
V COMP
R FB
+
V OFS
-
+
V OUT
-
C REF
FB
VDIFF
VSEN
RGND
IREF
+
-
ERROR AMPLIFIER
I OFS
+
+
-
The droop voltage, V DROOP , is created by sensing the
current through the output inductors. This is accomplished
by using a continuous DCR current sensing method.
Inductor windings have a characteristic distributed
resistance or DCR (Direct Current Resistance). For
simplicity, the inductor DCR is considered as a separate
lumped quantity, as shown in Figure 7. The channel current,
I L , flowing through the inductor, passes through the DCR.
Equation 5 shows the s-domain equivalent voltage, V L ,
across the inductor.
+
V DROOP
-
ICOMP
-
DIFFERENTIAL
REMOTE-SENSE
AMPLIFIER
V L ( s ) = I L ? ( s ? L + DCR )
(EQ. 5)
The inductor DCR is important because the voltage dropped
FIGURE 6. OUTPUT VOLTAGE AND LOAD-LINE
REGULATION WITH OFFSET ADJUSTMENT
13
across it is proportional to the channel current. By using a
simple R-C network and a current sense amplifier, as shown
FN9200.2
July 27, 2005
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| ISL6566AIRZ | 功能描述:IC CTRLR PWM 3PHASE BUCK 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6566AIRZ-T | 功能描述:IC CTRLR PWM 3PHASE BUCK 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6566CR | 功能描述:IC CTRLR PWM BUCK 3PHASE 40-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6566CRR5184 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| ISL6566CR-T | 功能描述:IC CTRLR PWM BUCK 3PHASE 40-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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