参数资料
| 型号： | ISL6260CCRZ-T |
| 厂商： | Intersil |
| 文件页数： | 17/28页 |
| 文件大小： | 0K |
| 描述： | IC REG PWM MULTI-PHASE 40-QFN |
| 标准包装： | 4,000 |
| 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： | 带卷 (TR) |
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ISL6260C
Theory of Operation
Operational Description
V DD
The ISL6260C is a multiphase regulators implementing
Intel? IMVP-6+ protocol. It can be programmed for one-,
VR_ON
10mV/μs
2mV/μs
two- or three-channel operation for microprocessor core
applications up to 70A. With ISL6208 gate driver capable of
diode emulation, the ISL6260C provides optimum efficiency
120μs
SOFT & VO
VBOOT
90%
VID COMMANDED
VOLTAGE
in both heavy and light conditions.
ISL6260C uses Intersil patented R 3 (Robust Ripple
Regulator?) modulator. The R 3 modulator combines the
best features of fixed frequency PWM and hysteretic PWM
while eliminating many of their shortcomings. The ISL6260C
CLK_EN#
13 SWITCHING CYCLES
modulator internally synthesizes analog signals inside the IC
emulating the inductor ripple currents and use hysteretic
IMVP-6+ PGOOD
~7ms
comparators on those signals to determine switching pulse
widths. Operating on these large-amplitude, noise-free
synthesized signals allows the ISL6260C to achieve lower
output ripple and lower phase jitter than conventional
hysteretic and fixed PWM mode controllers. Unlike
conventional hysteretic converters, the ISL6260C has an
error amplifier that allows the controller to maintain a 0.5%
output voltage accuracy. At heavy load conditions, the
ISL6260 is switching at a relatively constant switching
frequency similar to fixed frequency PWM controller. At light
load conditions, the ISL6260C is switching at a frequency
proportional to load current similar to hysteretic mode
controller.
FIGURE 42. SOFT-START WAVEFORMS USING A 20nF SOFT
CAPACITOR
Static Operation
A) Voltage Regulation at Zero Load Current
After the start sequence, the output voltage will be regulated
to the value set by the VID inputs per Table 1. The entire VID
Table is presented in the Intel IMVP-6+? specification. The
ISL6260C will control the no-load output voltage to an
accuracy of ±0.5% over the range of 0.75V to 1.5V.
TABLE 1. TRUNCATED VID TABLE FOR INTEL IMVP-6+?
SPECIFICATION
ISL6260C disables PWM2 when PSI# is asserted low. And
the power monitor pin provides an analog signal
representing the output power of the converter.
Start-up Timing
With the controller's +5V V DD voltage above the POR
threshold, the start-up sequence begins when VR_ON
exceeds the 3.3V logic HIGH threshold. Approximately
120μs later SOFT and V OUT start ramping up to the boot
voltage of 1.2V. During this interval, the SOFT capacitor is
charged with approximately 40μA. Therefore, if the SOFT
capacitor is selected to be 20nF, the SOFT ramp will be at
about 2mV/μs for a soft-start time of 600μs. Once V OUT
(VDIFF) is within 10% of the boot voltage for 13 PWM cycles
(43μs for frequency = 300kHz), then CLK_EN# is pulled
LOW and the SOFT capacitor is charged up with
approximately 200μA. Therefore, V OUT slews at +10mV/μs
to the voltage set by the VID pins. Approximately 7ms later,
PGOOD is asserted HIGH. A typical start-up timing is shown
in Figure 42. Similar results occur if VR_ON is tied to V DD ,
with the soft-start sequence starting 120μs after V DD
crosses the POR threshold.
VID6
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
...
1
1
VID5
0
0
0
0
0
0
0
0
1
1
1
0
0
1
1
1
1
1
VID4
0
0
0
0
0
1
1
1
0
0
1
0
1
0
0
0
1
1
VID3
0
0
0
0
1
0
1
1
1
1
1
0
0
0
0
0
1
1
VID2
0
0
1
1
0
0
0
1
0
0
1
1
0
0
0
0
1
1
VID1
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
1
1
VID0
0
1
1
1
0
1
0
0
0
1
0
0
0
0
1
0
0
1
VOUT
1.500V
1.4875
1.4375
1.4125
1.4000
1.2875
1.2000
1.1500
1.0000
0.9625
0.7500
0.6500
0.5000
0.300
Off
Off
Off
Off
Off
17
FN9259.3
June 21, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ISL6260CRZ-T | 功能描述:直流/直流开关调节器 MULTI-PHS3 PHS EXT BUCK CONT IMVP-6 4 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 |
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