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| 型号： | ISL6263ACRZ |
| 厂商： | Intersil |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC VREG 5BIT 1PHASE 32-QFN |
| 标准包装： | 60 |
| 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： | 管件 |
ISL6263A
VDD
OCP
?
+
10 μ A
+
OCSET
VSUM
R OCSET
R S
+
DROOP
?
DFB
DROOP
?
VO
V RSNS
FIGURE 9. EQUIVALENT MODEL FOR DROOP CIRCUIT USING DISCRETE RESISTOR CURRENT SENSING
The current sensing traces should be routed directly to the
inductor pads for accurate DCR voltage drop measurement.
However, due to layout imperfection, the calculated R DRP2
may still need slight adjustment to achieve optimum load line
i core
Δ I core
slope. It is recommended to adjust R DRP2 after the system
has achieved thermal equilibrium at full load. For example, if
V core
V core
Δ V core
the maximum load current is 20A, one should apply a 20A
load current and look for 160mV output voltage droop. If the
voltage droop is 155mV, the new value of R DRP2 is
calculated in Equation 17:
Δ V core = Δ I core × R droop
FIGURE 10. DESIRED LOAD TRANSIENT RESPONSE
WAVEFORMS
R DRP2new = ------------------- ? ( R DRP1 + R DRP2 ) – R DRP1
160mV
155mV
(EQ. 17)
For the best accuracy, the effective resistance on the DFB
and VSUM pins should be identical so that the bias current
of the droop amplifier does not cause an offset voltage.
Dynamic Droop Capacitor Design Using DCR
i core
Sensing
Figure 10 shows the desired waveforms during load
V core
V core
transient response. V CCGFX needs to follow the change in
I core as close as possible. The transient response of
V CCGFX is determined by several factors, namely the choice
of output inductor, output capacitor, compensator design,
and the design of droop capacitor C N .
If C N is designed correctly, the voltage V DROOP -V O will be
an excellent representation of the inductor current. Given the
correct C N design, V CCGFX has the best chance of tracking
I CORE , if not, its voltage will be distorted from the actual
waveform of the inductor current and worsens the transient
response. Figure 11 shows the transient response when C N
is too small allowing V CCGFX to sag excessively during the
load transient. Figure 12 shows the transient response when
C N is too large. V CCGFX takes too long to droop to its final
value.
16
FIGURE 11. LOAD TRANSIENT RESPONSE WHEN C N IS TOO
SMALL
i core
V core V core
FIGURE 12. LOAD TRANSIENT RESPONSE WHEN C N IS TOO
LARGE
FN9284.3
July 8, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6263ACRZ-T | 功能描述:直流/直流开关调节器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 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 |
| ISL6263AEVAL1Z | 功能描述:EVAL BOARD FOR ISL6263A 1 32QFN RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6263AIRZ | 功能描述:直流/直流开关调节器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 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 |
| ISL6263AIRZ-T | 功能描述:直流/直流开关调节器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 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 |
| ISL6263B | 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 IMVP-6 Santa Rosa GPU Core |
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