参数资料
| 型号： | ISL6556ACRZ |
| 厂商： | Intersil |
| 文件页数： | 21/25页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR MULTIPHASE VRM10 32-QFN |
| 标准包装： | 60 |
| 应用： | 控制器，Intel VR10X |
| 输入电压： | 3 V ~ 12 V |
| 输出数： | 4 |
| 输出电压： | 0.84 V ~ 1.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 管件 |
ISL6556A
voltage ripple as outlined in Output Filter Design . Choose the
lowest switching frequency that allows the regulator to meet
close as possible to each upper MOSFET drain to minimize
board parasitic impedances and maximize suppression.
the transient-response requirements.
0.3
1000
0.2
100
0.1
I L,PP = 0
I L,PP = 0.5 I O
I L,PP = 0.75 I O
10
10
100 1000
10000
0
0
0.2
0.4 0.6
DUTY CYCLE (V O /V IN )
0.8
1.0
SWITCHING FREQUENCY (kHz)
FIGURE 13. R T vs SWITCHING FREQUENCY
FIGURE 14. NORMALIZED INPUT-CAPACITOR RMS CURRENT
vs DUTY CYCLE FOR 2-PHASE CONVERTER
Switching frequency is determined by the selection of the
frequency-setting resistor, R T (see the figures labeled
Typical Application on pages 4 and 5). Figure 13 and
0.3
I L,PP = 0
I L,PP = 0.25 I O
I L,PP = 0.5 I O
I L,PP = 0.75 I O
Equation 26 are provided to assist in selecting the correct
value for R T .
R T = 1.0203 ( 10 )
·
[ 10.6258- ( 1.03167 ) log ( f S ) ]
– 1200
(EQ. 26)
0.2
Input Capacitor Selection
The input capacitors are responsible for sourcing the ac
component of the input current flowing into the upper
MOSFETs. Their RMS current capacity must be sufficient to
handle the ac component of the current drawn by the upper
0.1
MOSFETs which is related to duty cycle and the number of
active phases.
0
0
0.2
0.4
0.6
0.8
1.0
For a two phase design, use Figure 14 to determine the
input-capacitor RMS current requirement given the duty
cycle, maximum sustained output current (I O ), and the ratio
of the per-phase peak-to-peak inductor current (I L,PP ) to I O .
Select a bulk capacitor with a ripple current rating which will
minimize the total number of input capacitors required to
support the RMS current calculated. The voltage rating of
the capacitors should also be at least 1.25 times greater
than the maximum input voltage.
Figures 15 and 16 provide the same input RMS current
information for three and four phase designs respectively.
Use the same approach to selecting the bulk capacitor type
and number as described above.
Low capacitance, high-frequency ceramic capacitors are
needed in addition to the bulk capacitors to suppress leading
and falling edge voltage spikes. The result from the high
current slew rates produced by the upper MOSFETs turn on
and off. Select low ESL ceramic capacitors and place one as
21
DUTY CYCLE (V O/ V IN )
FIGURE 15. NORMALIZED INPUT-CAPACITOR RMS CURRENT
vs DUTY CYCLE FOR 3-PHASE CONVERTER
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6556ACRZ-T | 功能描述:IC CTRLR MULTIPHASE VRM10 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 |
| ISL6556ACRZ-TR5208 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| ISL6556BCB | 功能描述:IC CTRLR MULTIPHASE VRM10 28SOIC 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) |
| ISL6556BCB-T | 功能描述:IC CTRLR MULTIPHASE VRM10 28SOIC 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) |
| ISL6556BCBZ | 功能描述:电流型 PWM 控制器 VRM 10 0 MULTI-PHS CONTROLLER RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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