参数资料
| 型号： | ISL62771IRTZ |
| 厂商： | Intersil |
| 文件页数： | 26/36页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTRLR MULTIPHASE 40TQFN |
| 标准包装： | 60 |
| 系列： | Robust Ripple Regulator™ (R³) |
| 应用： | 控制器，AMD Fusion? SVI 2.0 CPU GPU |
| 输入电压： | 4.5 V ~ 25 V |
| 输出数： | 2 |
| 输出电压： | 0.006 V ~ 1.55 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 管件 |
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ISL62771
off. This behavior provides the maximum amount of protection
against shorted high-side power MOSFETs while preventing output
ringing below ground.
Thermal Monitor [NTC, NTC_NB]
The ISL62771 features two thermal monitors, which use an
is released. The signal changes state and the CPU resumes
normal operation. The over-temperature threshold returns to the
trip level.
Table 13 summarizes the fault protections.
TABLE 13. FAULT PROTECTION SUMMARY
1ms
external resistor network that includes an NTC thermistor to
monitor motherboard temperature and alert the AMD CPU of a
thermal issue. Figure 18 shows the basic thermal monitor circuit
on the Core VR NTC pin. The Northbridge VR features the same
thermal monitor. The controller drives a 30μA current out of the
NTC pin and monitors the voltage at the pin. The current flowing
out of the NTC pin creates a voltage that is compared to a
warning threshold of 640mV. When the voltage at the NTC pin
falls to this warning threshold or below, the controller asserts
VR_HOT_L to alert the AMD CPU to throttle back load current to
stabilize the motherboard temperature. A thermal fault counter
begins counting toward a minimum shutdown time of 100μs.
The thermal fault counter is an up/down counter, so if the
voltage at the NTC pin rises above the warning threshold, it will
count down and extend the time for a thermal fault to occur. The
warning threshold does have 20mV of hysteresis.
FAULT TYPE
Overcurrent
Phase Current
Unbalance
Way-Overcurrent
(1.5xOC)
Undervoltage
-325mV
Overvoltage
+325mV
FAULT DURATION
BEFORE PROTECTION
PROTECTION ACTION
7.5μs to 11.5μs PWM tri-state,
PGOOD latched
low
Immediately
PGOOD latched
low.
PWM tri-state.
PGOOD latched
low.
Actively pulls the
output voltage to
FAULT
RESET
ENABLE
toggle or
VDD toggle
If the voltage at the NTC pin continues to fall down to the
shutdown threshold of 580mV or below, the controller goes into
shutdown and triggers a thermal fault. The PGOOD pin is pulled
low and tri-states the power MOSFETs. A fault on either side will
shutdown both VRs.
NTC Thermal
100μs min
below VID value,
then tri-state.
PGOOD latched
low.
PWM tri-state.
Fault Recovery
INTERNAL TO
ISL62771
All of the previously described fault conditions can be reset by
bringing ENABLE low or by bringing VDD below the POR
30μA
VR_HOT_L
+V
R
threshold. When ENABLE and VDD return to their high operating
levels, the controller resets the faults and soft-start occurs.
Interface Pin Protection
NTC
The SVC and SVD pins feature protection diodes, which must be
R p
+
V NTC
-
R NTC
MONITOR
considered when removing power to VDD and VDDIO, but leaving
it applied to these pins. Figure 19 shows the basic protection on
the pins. If SVC and/or SVD are powered but VDD is not, leakage
current will flow from these pins to VDD.
R s
WARNING SHUTDOWN
640mV 580mV
INTERNAL TO
ISL62771
FIGURE 18. CIRCUITRY ASSOCIATED WITH THE THERMAL MONITOR
FEATURE OF THE ISL62771
As the board temperature rises, the NTC thermistor resistance
decreases and the voltage at the NTC pin drops. When the
voltage on the NTC pin drops below the over-temperature trip
threshold, then VR_HOT is pulled low. The VR_HOT signal is used
to change the CPU operation and decrease power consumption.
With the reduction in power consumption by the CPU, the board
temperature decreases and the NTC thermistor voltage rises.
Once the over-temperature threshold is tripped and VR_HOT is
taken low, the over-temperature threshold changes to the reset
level. The addition of hysteresis to the over-temperature
threshold prevents nuisance trips. Once both pin voltages exceed
the over-temperature reset threshold, the pull-down on VR_HOT
26
VDD
SVC, SVD
GND
FIGURE 19. PROTECTION DEVICES ON THE SVC AND SVD PINS
FN8321.2
September 12, 2013
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL62771IRTZ-T | 功能描述:IC PWM CTRLR MULTIPHASE 40TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:Robust Ripple Regulator™ (R³) 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 |
| ISL62773 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Multiphase PWM Regulator for AMD Fusiona?￠ Desktop CPUs Using SVI 2.0 |
| ISL62773HRZ | 功能描述:电流型 PWM 控制器 MULTI-OUTPUT CNTRLR FOR AMD FUSION UP 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 |
| ISL62773HRZ-T | 功能描述:电流型 PWM 控制器 MULTI-OUTPUT CNTRLR FOR AMD FUSION UP 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 |
| ISL62773IRZ | 功能描述:电流型 PWM 控制器 MULTI-OUTPUT CNTRLR FOR AMD FUSION UP 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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