参数资料
| 型号： | ISL6313CRZ-T |
| 厂商： | Intersil |
| 文件页数： | 18/33页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM 2PHASE BUCK 36-QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 4,000 |
| 应用： | 控制器，Intel VR11，AMD CPU |
| 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： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 带卷 (TR) |
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ISL6313
In other cases, the designer may determine that a more
For Negative Offset (connect R OFS to VCC):
R OFS = --------------------------
R OFS = --------------------------
cost-effective solution can be achieved by adding droop.
Droop can help to reduce the output-voltage spike that
results from fast load-current demand changes.
The magnitude of the spike is dictated by the ESR and ESL
of the output capacitors selected. By positioning the no-load
voltage level near the upper specification limit, a larger
negative spike can be sustained without crossing the lower
limit. By adding a well controlled output impedance, the
output voltage under load can effectively be level shifted
down so that a larger positive spike can be sustained without
1.6 ? R FB
V OFFSET
For Positive Offset (connect R OFS to GND):
0.3 ? R FB
V OFFSET
VSEN
(EQ. 12)
(EQ. 13)
crossing the upper specification limit.
As shown in Figure 7, a current proportional to the average
+
V OFS
-
R FB
VREF
E/A
current of all active channels, I AVG , flows from FB through a
load-line regulation resistor R FB . The resulting voltage drop
across R FB is proportional to the output current, effectively
creating an output voltage droop with a steady-state value
defined as Equation 9:
FB
I OFS
V DROOP = I AVG ? R FB
(EQ. 9)
V OUT = V REF – V OFS – ? ------------- ? ------------------ ? R FB ?
? ?
N
R ISEN
The regulated output voltage is reduced by the droop voltage
V DROOP . The output voltage as a function of load current is
derived by combining Equations 6, 8, and 9.
? I OUT DCR ?
(EQ. 10)
R OFS
OFS
GND
ISL6313
+
-
GND
0.3V
-
1.6V
+
VCC
In Equation 10, V REF is the reference voltage, V OFS is the
programmed offset voltage, I OUT is the total output current
of the converter, R ISEN is the internal sense resistor
connected to the ISEN+ pin, R FB is the feedback resistor, N
is the active channel number, and DCR is the Inductor DCR
value.
FIGURE 8. POSITIVE OFFSET OUTPUT VOLTAGE
PROGRAMMING
VSEN
-
R LL = ------------ ? ------------------
R ISEN
Therefore the equivalent loadline impedance, i.e. droop
impedance, is equal to:
R FB DCR
(EQ. 11)
N
V OFS
+
R FB
FB
I OFS
VREF
E/A
Output-Voltage Offset Programming
The ISL6313 allows the designer to accurately adjust the
offset voltage by connecting a resistor, R OFS , from the OFS
pin to VCC or GND. When R OFS is connected between OFS
VCC
and VCC, the voltage across it is regulated to 1.6V. This
causes a proportional current (I OFS ) to flow into the OFS pin
and out of the FB pin, providing a negative offset. If R OFS is
connected to ground, the voltage across it is regulated to
R OFS
OFS
ISL6313
+
-
0.3V
-
+
1.6V
0.3V, and I OFS flows into the FB pin and out of the OFS pin,
providing a positive offset. The offset current flowing through
the resistor between VSEN and FB will generate the desired
offset voltage which is equal to the product (I OFS x R FB ).
These functions are shown in Figures 8 and 9.
Once the desired output offset voltage has been determined,
use Equations 12 and 13 to set R OFS :
GND
FIGURE 9. NEGATIVE OFFSET OUTPUT VOLTAGE
PROGRAMMING
VCC
18
FN6448.2
September 2, 2008
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| ISL6313IRZ | 功能描述:IC CTRLR PWM 2PHASE BUCK 36-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 |
| ISL6313IRZ-T | 功能描述:IC CTRLR PWM 2PHASE BUCK 36-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 |
| ISL6314CRZ | 功能描述:电压模式 PWM 控制器 1-PH PWM CNTRLR W/1 INTEGRTD DRVRS 32LD RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| ISL6314CRZ-T | 功能描述:IC CTRLR PWM 1PHASE BUCK 32-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 |
| ISL6314CRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6314CRZ-T W/GOLD BOND WIRE ONLY T&R - Tape and Reel |
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