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| 型号： | IR3503MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 22/39页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE VR11.0/1 32-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 8mA |
| 电源电压： | 4.75 V ~ 7.5 V |
| 工作温度： | 0°C ~ 100°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-MLPQ（5x5） |
| 包装： | 标准包装 |
| 其它名称： | IR3503MTRPBFDKR |
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IR3503
V CCL
2
Figure 13: SHIFT functionality
Figure 13 clearly explains the SHIFT functionality. The phase ICs wait for 8 PHSIN cycles after the assertion of
PSI# to start shedding the phases (and issue a down SHIFT signal). When the phases are shed, the CLK frequency
is also reduced simultaneously. The SHIFT signal is synchronized with the CLKOUT falling edge. However, on de-
assertion of PSI#, all the phases that were active before PSI# assertion will be restored immediately without any
delay. Another key feature in IR3503 is the internal programming of over-current protection (OCP). The OCP
threshold is calculated based on the number of phases in the system as given by the equation below:
OCP threshold =
1.17 * Number of active phases
Maximum number of phases
Hence, the OCP threshold will be automatically adjusted based on the number of active phases in the system.
When PSI# de-assertion occurs, all the phases in the system are restored immediately without any delay which can
also be clearly observed in figure 13.
Over-Current Hiccup Protection after Soft Start
The over current limit is fixed at
1.17 * Number of active phases
Maximum number of phases
above the VDAC. Figure 14 shows the constant over-
current control with delay after VRRDY is asserted. The delay is required since over-current conditions can occur as
part of normal operation due to load transients or VID transitions.
If the VDRP pin voltage, which is proportional to the average current plus VDAC voltage, exceeds the over current
protection (OCP) limit after VRRDY is asserted, it will initiate the discharge of the capacitor at SS/DEL. The
magnitude of the discharge current is proportional to the voltage difference between VDRP and OCP limit and has a
maximum nominal value of 55uA. If the over-current condition persists long enough for the SS/DEL capacitor to
discharge below the 120 mV offset of the delay comparator, the fault latch will be set pulling the error amplifier’s
Page 22 of 39
February 12, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3504MPBF | 制造商:International Rectifier 功能描述:Control IC 32-Pin MLPQ Strip |
| IR3504MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3504 AMD SVID CTRL IC RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3505 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3505MPBF | 功能描述:IC XPHASE3 CONTROL 16-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase3™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3505MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE3 DDR VTT 7V 2A 3 Wire RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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