参数资料
| 型号： | ISL6353CRTZ-T |
| 厂商： | Intersil |
| 文件页数： | 23/30页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLER DDR VR12 40TQFN |
| 标准包装： | 6,000 |
| 应用： | 控制器，DDR，Intel VR12 |
| 输入电压： | 4.5 V ~ 25 V |
| 输出数： | 1 |
| 输出电压： | 0.25 V ~ 1.52 V |
| 工作温度： | 0°C ~ 70°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： | 带卷 (TR) |
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ISL6353
too fast, the controller will limit the voltage slew rate at the
SetVID_slow slew rate.
ALERT# will be asserted low at the end of SetVID_fast and
SetVID_slow VID transitions.
When the ISL6353 is in DE mode, it will actively drive the output
voltage up when the VID changes to a higher value. DE operation
will resume after reaching the new voltage level. If the load is
light enough to warrant DCM, it will enter DCM after the inductor
current has crossed zero for four consecutive cycles. The ISL6353
will remain in DE mode when the VID changes to a lower value.
The output voltage will decay to the new value and the load will
system. The VR_HOT# pin will be pulled back high if the voltage
on the NTC pin goes above 0.95V.
If the voltage on the NTC pin goes below 0.93V the ALERT# pin
will be pulled low indicating a thermal alert. ALERT# is reset by
checking the status register. ALERT# will be pulled low again if
the NTC pin voltage goes above 0.97V.
All the above fault conditions can be reset by bringing VR_ON low
or by bringing V DD below the POR threshold. When VR_ON and
V DD return to their high operating levels, a soft-start will occur.
VR_HOT#/ALERT# BEHAVIOR
determine the slew rate.
Protection Functions
The ISL6353 provides overcurrent, current-balance, overvoltage,
and over-temperature protection.
OVERCURRENT PROTECTION
Temp Zone
Bit 7 =1
Bit 6 =1
Bit 5 =1
1
VR Temperature
7
3% Hysteris
10
12
1111 1111
0111 1111
0011 1111
0001 1111
3
SVID
6
4
16
14
The ISL6353 determines overcurrent protection (OCP) by
comparing the average value of the measured current I sense with
an internal current source threshold. ISL6353 declares OCP when
I sense is above the threshold for 120μs.
The way-overcurrent protection threshold is significantly above
the standard overcurrent protection threshold. The
way-overcurrent function is intended to provide a fast overcurrent
Temp Zone
Register 2 8
0001 1111 0011 1111 0 1 11 1111 1 111 1111 0 1 11 1111 0011 1111 0001 1111
Status 1
Register = “001” = “0 1 1” = “0 0 1”
GerReg 5 13 GerReg 15
Status1 Status1
ALERT#
detection and action mechanism in a short circuit output
condition. Once the way-overcurrent condition is detected, the
PWM outputs will immediately shut off and PGOOD will go low to
maximize protection.
VR_HOT#
9 11
FIGURE 14. VR_HOT#/ALERT# BEHAVIOR
CURRENT BALANCE FAULT
The ISL6353 monitors the ISEN pin voltages to detect severe
phase current imbalances. If any ISEN pin voltage is more than
20mV different than the average ISEN voltage for 1ms, the
controller will declare a fault and latch off.
OVERVOLTAGE PROTECTION
The ISL6353 will declare an OVP fault if the output voltage
exceeds 175mV above the VID set value + positive offset. In the
The controller drives a 60μA current source out of the NTC pin.
The current source flows through the NTC resistor network on the
pin and creates a voltage that is monitored by the controller
through an A/D converter (ADC) to generate the Tzone value.
Table 4 shows the typical programming table for Tzone. The user
needs to scale the NTC a network resistance such that it
generates the NTC pin voltage that corresponds to the left-most
column.
TABLE 4. TZONE TABLE
event of an OVP condition, the OVP pin is pulled high. OVP is
blanked during dynamic VID events to prevent false trigger.
During soft-start, the OVP threshold is set at 2.33V to avoid a
false trigger due to turn on into a precharged output capacitor
bank.
POWER GOOD INDICATOR
The ISL6353 takes the same actions for all of the above fault
protection functions: PGOOD is set low and the high-side and low-
side MOSFETs are turned off. Any residual inductor current will
decay through the MOSFET body diodes. These fault conditions
can be reset by bringing VR_ON low or by bringing V DD below the
POR threshold. When VR_ON and V DD return to their high
operating levels, a soft-start will occur.
THERMAL MONITOR
VNTC (V)
0.86
0.88
0.92
0.96
1.00
1.04
1.08
1.12
1.16
1.20
>1.20
TMAX (%)
>100
100
97
94
91
88
85
82
79
76
<76
TZONE
FFh
FFh
7Fh
3Fh
1Fh
0Fh
07h
03h
01h
01h
00h
The ISL6353 has a thermal throttling feature. If the voltage on
the NTC pin goes below the 0.91V threshold, the VR_HOT# pin is
pulled low indicating the need for thermal throttling to the
23
September 15, 2011
FN6897.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6353CRTZ-TS2568 | 制造商:Intersil Corporation 功能描述:INTEL, ISL6353CRTZ-T W/BARCODE LABELS, 12 MONTH D/C RESTRICT - Tape and Reel |
| ISL6353CRZ | 制造商:Intersil 功能描述:Multiphase PWM Regulator for VR12 DDR Memory Systems |
| ISL6353IRTZ | 功能描述:电流型 PWM 控制器 VR12 MEMORY CNTRLR 3 PHS 2 INT 5V DRVRS 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 |
| ISL6353IRTZ-T | 功能描述:电流型 PWM 控制器 VR12 MEMORY CNTRLR 3 PHS 2 INT 5V DRVRS 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 |
| ISL6363CRTZ | 功能描述:IC CONTROLLER VR12 48TQFN 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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