参数资料
| 型号： | ISL6313IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 30/33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： | -40°C ~ 85°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
L ≤ ----------------------------- ? Δ V MAX – ( Δ I ? ESR ) ? ? V IN – V O ?
( Δ I ) 2
1.25 ? N ? C
Switching Frequency
? ?
(EQ. 46)
0.3
There are a number of variables to consider when choosing
the switching frequency, as there are considerable effects on
the upper MOSFET loss calculation. These effects are
outlined in “MOSFETs” on page 24, and they establish the
0.2
upper limit for the switching frequency. The lower limit is
established by the requirement for fast transient response
and small output-voltage ripple. Choose the lowest switching
frequency that allows the regulator to meet the
transient-response requirements.
0.1
I L(P-P) = 0
I L(P-P) = 0.5 I O
I L(P-P) = 0.75 I O
Switching frequency is determined by the selection of the
0
0
0.2
0.4
0.6
0.8
1.0
frequency-setting resistor, R S . Figure 24 and Equation 47
are provided to assist in selecting the correct value for R S .
DUTY CYCLE (V IN/ V O )
FIGURE 25. NORMALIZED INPUT-CAPACITOR RMS
R S = 10
[ 10.61 – ( 1.035 ? log ( f S ) ) ]
(EQ. 47)
CURRENT FOR 2-PHASE CONVERTER
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
500
100
the capacitors should also be at least 1.25x greater than the
maximum input voltage. Figure 26 provides the same input
RMS current information for single-phase designs. Use the
same approach for selecting the bulk capacitor type and
number.
0.6
0.4
10
50
100
1k
2k
SWITCHING FREQUENCY (kHz)
FIGURE 24. R S vs SWITCHING FREQUENCY
Input Capacitor Selection
The input capacitors are responsible for sourcing the AC
component of the input current flowing into the upper
0.2
I L(P-P) = 0
I L(P-P) = 0.5 I O
I L(P-P) = 0.75 I O
MOSFETs. Their RMS current capacity must be sufficient to
handle the AC component of the current drawn by the upper
0
0
0.2
0.4
0.6
0.8
1.0
MOSFETs which is related to duty cycle and the number of
active phases.
For a two-phase design, use Figure 25 to determine the
input-capacitor RMS current requirement set by the duty
cycle, maximum sustained output current (I O ), and the ratio
of the peak-to-peak inductor current (I L(P-P) ) to I O .
30
DUTY CYCLE (V IN /V O )
FIGURE 26. NORMALIZED INPUT-CAPACITOR RMS
CURRENT FOR SINGLE-PHASE CONVERTER
Low capacitance, high-frequency ceramic capacitors are
needed in addition to the input bulk capacitors to suppress
leading and falling edge voltage spikes. The spikes result from
the high current slew rate produced by the upper MOSFET
turn on and off. Select low ESL ceramic capacitors and place
one as close as possible to each upper MOSFET drain to
minimize board parasitics and maximize suppression.
FN6448.2
September 2, 2008
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| 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 |
| ISL6314CRZ-TS2568 | 制造商:Intersil Corporation 功能描述:- Tape and Reel |
| ISL6314IRZ | 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 |
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