参数资料
| 型号： | ISL6260CCRZ |
| 厂商： | Intersil |
| 文件页数： | 20/28页 |
| 文件大小： | 0K |
| 描述： | IC REG PWM MULTI-PHASE 40-QFN |
| 标准包装： | 50 |
| 应用： | 转换器，Intel IMVP-6 |
| 输出数： | 1 |
| 输出电压： | 0.3 V ~ 1.5 V |
| 工作温度： | -10°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN（6x6） |
| 包装： | 管件 |
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ISL6260C
TABLE 3. SUMMARY OF THE FAULT PROTECTION AND RESET OPERATIONS OF ISL6260C
FAULT DURATION
PRIOR TO
PROTECTION
PROTECTION
ACTIONS
FAULT RESET
Overcurrent
Way-Overcurren (2.5X OC)
Overvoltage 1.7V
120μs
<2μs
Immediately
PWMs tri-state, PGOOD latched low
PWMs tri-state, PGOOD latched low
Low side MOSFET on until Vcore <0.85V, then PWM
VR_ON toggle or VDD toggle
VR_ON toggle or VDD toggle
VDD toggle
tri-state, PGOOD latched low.
Overvoltage +200mV
Undervoltage -300mV
Phase Current Unbalance
Over Temperature
1ms
1ms
1ms
Immediately
PWMs tri-state, PGOOD latched low
PWMs tri-state, PGOOD latched low
PWMs tri-state, PGOOD latched low
VR_TT# goes low
VR_ON toggle or VDD toggle
VR_ON toggle or VDD toggle
VR_ON toggle or VDD toggle
N/A
The ISL6260C has a thermal throttling feature. If the voltage
on the NTC pin goes below the 1.18V OT threshold, the
VR_TT# pin is pulled low indicating the need for thermal
throttling to the system oversight processor. No other action
is taken within the ISL6260C in response to NTC pin voltage.
Fault protection is summarized in Table 3.
Power Monitor
The power monitor signal is an analog output. Its magnitude
is proportional to the product of V CCSENSE and the voltage
difference between V DROOP and V O , which is the
programmed load line impedance (2.1m Ω ) multiplied by load
current. The output voltage of the PMON pin is given by:
V PMON = V CCSENSE *(V DROOP -V O )*17.5 (Volt)
The power consumed by the CPU can be calculated by:
voltage is commanded to rise, and out of the SOFT capacitor
when the output voltage is commanded to fall.
The two slew rates are determined by the currents into the
SOFT pin. As can be seen in Figure 44, the SOFT pin has a
capacitance to ground. Also, the SOFT pin is the input to the
error amplifier and is, therefore, the commanded system
voltage. Depending on the state of the system, i.e. Start-Up
or Active mode, and the state of the DPRSLPVR pin, one of
the two currents shown in Figure 44 will be used to charge or
discharge this capacitor, thereby controlling the slew rate of
the commanded voltage. These currents can be found under
the Soft Current section of the “Electrical Specifications”
ISL6260C
Pcpu = V PMON /(17.5*0.0021) (Watt)
where the 0.0021 is the load line impedance.The power
monitor load regulation is about 7 Ω . Basically, within its
I SS
I 2
ERROR
AMPLIFIER
+
sourcing/sinking current capability range, when the power
monitor loading changes 1mA, the output of the power
monitor will change 7mV. The 7 Ω impedance is associated
SOFT
with the layout and packaging resistance of PMON pin inside
the IC. Compared to the load resistance on the power
monitor pin in practical applications, 7 Ω output impedance
contributes no significance of error.
C SOFT
+
V REF
Component Selection and Application
Soft-Start and Mode Change Slew Rates
The ISL6260C uses 2 slew rates for various modes of
operation. The first is a slow slew rate, used to reduce inrush
current on start-up. It is also used to reduce audible noise
when entering or exiting Deeper Sleep Mode. A faster slew
rate is used to exit out of Deeper Sleep and to increase
system performance by achieving active mode regulation
more quickly. Note that the SOFT cap current is bidirectional
and is flowing into the SOFT capacitor when the output
20
FIGURE 44. SOFT PIN CURRENT SOURCES FOR FAST AND
SLOW SLEW RATES
The first current, labeled I SS , is given in the Specification
Table as 42μA. This current is used during Soft-Start. The
second current, I 2 sums with I SS to get the large current
This total current is typically 205μA with a minimum of
180μA.
The IMVP-6+? specification reveals the critical timing
associated with regulating the output voltage. The symbol,
Slewrate, as given in the IMVP-6+? specification, will
FN9259.3
June 21, 2010
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| ISL6260CCRZ-T | 功能描述:电流型 PWM 控制器 MULTI-PHS(3 PHS EXT DC/DC BUCK CONT 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 |
| ISL6260CIRZ | 功能描述:电流型 PWM 控制器 MULTI-PHS(3 PHS EXT DC/DC BUCK CONT 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 |
| ISL6260CIRZ-T | 功能描述:电流型 PWM 控制器 MULTI-PHS(3 PHS EXT DC/DC BUCK CONT 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 |
| ISL6260CRZ | 功能描述:直流/直流开关调节器 MULTI-PHS3 PHS EXT DC/DC BUCK CNTRLR RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL6260CRZR5242 | 制造商:Intersil Corporation 功能描述:53289C01 MASK ONLY WITH DOT ON BRAND - Rail/Tube |
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