参数资料
| 型号： | ISL6263BHRZ-T |
| 厂商： | Intersil |
| 文件页数： | 9/18页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC BUCK CTRLR 1PH 32-QFN |
| 标准包装： | 6,000 |
| 应用： | 转换器，Intel IMVP-6 |
| 输入电压： | 5 V ~ 25 V |
| 输出数： | 1 |
| 输出电压： | 0.41 V ~ 1.29 V |
| 工作温度： | -10°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-QFN（5x5） |
| 包装： | 带卷 (TR) |
ISL6263B
TABLE 2. VID TABLE FOR INTEL IMVP-6+
V CCGFX CORE
VID4 VID3 VID2 VID1 VID0
- - - - -
V CCGFX
(V)
0
Theory of Operation
The R 3 Modulator
The heart of the ISL6263B is Intersil’s Robust-Ripple-
Regulator (R 3 ) Technology?. The R 3 modulator is a hybrid
of fixed frequency PWM control, and variable frequency
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
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1
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1
0
1
0
1
0
1
1.28750
1.26175
1.23600
1.21025
1.18450
1.15875
1.13300
1.10725
1.08150
1.05575
1.03000
1.00425
0.97850
0.95275
0.92700
0.90125
0.87550
0.84975
0.82400
0.79825
0.77250
0.74675
0.72100
0.69525
0.66950
0.64375
0.61800
0.59225
0.56650
0.54075
0.51500
0.41200
hysteretic control that will simultaneously affect the PWM
switching frequency and PWM duty cycle in response to
input voltage and output load transients.
The term “Ripple” in the name “Robust-Ripple-Regulator”
refers to the synthesized voltage-ripple signal V R that
appears across the internal ripple-capacitor C R. The V R
signal is a representation of the output inductor ripple
current. Transconductance amplifiers measuring the input
voltage of the converter and the output set-point voltage
V SOFT , together produce the voltage-ripple signal V R .
A voltage window signal V W is created across the VW and
COMP pins by sourcing a current proportional to g m V soft
through a parallel network consisting of resistor R FSET and
capacitor C FSET. The synthesized voltage-ripple signal V R
along with similar companion signals are converted into
PWM pulses.
The PWM frequency is proportional to the difference in
amplitude between V W and V COMP . Operating on these
large-amplitude, low noise synthesized signals allows the
ISL6263B to achieve lower output ripple and lower phase
jitter than either conventional hysteretic or fixed frequency
PWM controllers. Unlike conventional hysteretic converters,
the ISL6263B has an error amplifier that allows the controller
to maintain tight voltage regulation accuracy throughout the
VID range from 0.41200V to 1.28750V.
Power-On Reset
The ISL6263B is disabled until the voltage at the VDD pin
has increased above the rising VDD power-on reset (POR)
V DD_THR threshold voltage. The controller will become
disabled when the voltage at the VDD pin decreases below
the falling POR V DD_THF threshold voltage.
Start-Up Timing
Figure 4 shows the ISL6263B start-up timing. Once VDD has
ramped above V DD_THR , the controller can be enabled by
pulling the VR_ON pin voltage above the input-high
threshold V VR_ONH . Approximately 100μs later, the soft-start
capacitor C SOFT begins slewing to the designated VID
set-point as it is charged by the soft-start current source I SS .
The V CCGFX output voltage of the converter follows the
V SOFT voltage ramp to within 10% of the VID set-point then
counts 13 switching cycles, then changes the open-drain
output of the PGOOD pin to high impedance. During
soft-start, the regulator always operates in continuous
conduction mode (CCM).
9
FN6388.3
July 8, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6263C | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:5-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core Power |
| ISL6263CEVAL1 | 功能描述:EVAL BOARD 1 FOR ISL6263C RoHS:否 类别:编程器，开发系统 >> 评估板 - 线性稳压器 (LDO) 系列:* 产品变化通告:1Q2012 Discontinuation 30/Mar/2012 设计资源:NCP590MNDPTAGEVB Gerber Files 标准包装:1 系列:- 每 IC 通道数:2 - 双 输出电压:1.8V，2.8V 电流 - 输出:300mA 输入电压:2.1 ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 已供物品:板 已用 IC / 零件:NCP590MNDP 其它名称:NCP590MNDPTAGEVB-NDNCP590MNDPTAGEVBOS |
| ISL6263CHRZ | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP-6 W/IMON 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 |
| ISL6263CHRZ-T | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP-6 W/IMON 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 |
| ISL6263CRZ | 功能描述:直流/直流开关调节器 1 PHS INT DC/DC BUCK CNTRLR FOR INTEL 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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