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| 型号： | ISL6263ACRZ |
| 厂商： | Intersil |
| 文件页数： | 15/19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
The NTC network resistor value is dependent on
It is recommended to begin your droop design using the
R N ( T ) = ------------------------------------------------------------------------
temperature and is given by Equation 9:
( R NTC + R NTCS ) ? R NTCP
R NTC + R NTCS + R NTCP
(EQ. 9)
R NTC , R NTCS , and R NTCP component values of the
evaluation board available from Intersil.
The gain of the droop amplifier circuit is shown in Equation 15:
R DRP1
G 1 , the gain of V N to V DCR , is also dependent on the
temperature of the NTC thermistor shown in Equation 10:
R DRP2
k droopamp = 1 + -------------------
(EQ. 15)
G 1 ( T ) = -------------------------------
R N ( T ) + R S
R N ( T )
(EQ. 10)
The inductor DCR is a function of temperature and is
After determining R S and R NTCEQ networks, use
Equation 16 to calculate the droop resistances R DRP1 and
R DRP2 .
R DRP2 = ? ? ------------------------------------------- ? – 1 ? ? R DRP1
approximately given by Equation 11:
DCR ( T ) = DCR 25 ° C ? ( 1 + 0.00393 ? ( T – 25 ° C ) )
(EQ. 11)
? ? R droop ? ?
? ? DCR ? G 1 ( 25 ° C ) ? ?
(EQ. 16)
The droop amplifier output voltage divided by the total load
current is given by Equation 12:
R droop = G 1 ( T ) ? DCR 25 ° C ? ( 1 + 0.00393 ? ( T – 25 ° C ) ) ? k droopamp
(EQ. 12)
R droop is the actual load line slope, and 0.00393 is the
temperature coefficient of the copper. To make R droop
independent of the inductor temperature, it is desired to
have:
R droop is 8m Ω per Intel IMVP-6+ specification and R DRP1 is
typically 1k Ω .
The effectiveness of the R NTCEQ network is sensitive to the
coupling coefficient between the NTC thermistor and the
inductor. The NTC thermistor should be placed in the closet
proximity of the inductor.
To see whether the NTC network successfully compensates
the DCR change over-temperature, one can apply full load
current and wait for the thermal steady state and see how
G 1 ( T ) ? ( 1 + 0.00393 ? ( T – 25 ° C ) ) ? G 1t arg et
(EQ. 13)
much the output voltage deviates from the initial voltage
reading. A good compensation can limit the drift to less than
where G 1target is the desired ratio of V n / V DCR . Therefore, the
temperature characteristics G 1 is described by Equation 14:
2mV. If the output voltage is decreasing when the temperature
increases, that ratio between the NTC thermistor value and
G 1 ( T ) = ---------------------------------------------------------------------
G 1t arg et
( 1 + 0.00393 ? ( T – 25 ° C ) )
(EQ. 14)
VDD
the rest of the resistor divider network has to be increased.
Following the evaluation board value and layout of NTC
placement will minimize the engineering time.
OCP
?
+
10 μ A
+
OCSET
VSUM
R OCSET
R S
+
DROOP
?
DFB
DROOP
?
VO
V DCR
FIGURE 8. EQUIVALENT MODEL FOR DROOP CIRCUIT USING INDUCTOR DCR CURRENT SENSING
15
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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