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参数资料
| 型号： | ISL6261AEVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 17/34页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD 1 FOR ISL6261A |
| 标准包装： | 1 |
| 系列： | * |
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ISL6261A
10μA
OCSET
R ocset
OC
VSUM
I phase
Rs
L
DCR
Vo
C
o
INTERNAL TO ISL6261A
1
DROOP
DFB
DROOP
VO
ESR
1
VSEN
1000pF
1000pF
0~10
VCC-SENSE
TO PROCESSOR
SOCKET KELVIN
CONECTIONS
RTN
VSS-SENSE
330pF
VDIFF
FIGURE 6. SIMPLIFIED VOLTAGE DROOP CIRCUIT WITH CPU-DIE VOLTAGE SENSING AND INDUCTOR DCR CURRENT SENSING
C SOFT =
C SOFT = 200 μ A ( 10 mV μ s ) = 20 nF
= 2 . 8 mV
dV soft I ss 41 μ A
= =
dt
C SOFT
0 . 015 μ F
The IMVP-6 ? specification reveals the critical timing
associated with regulating the output voltage. SLEWRATE,
given in the IMVP-6 ? specification, determines the choice of
the SOFT capacitor, C SOFT , through Equation 2:
I GV (EQ. 2)
SLEWRATE
If SLEWRATE is 10mV/ μ s, and I GV is typically 200 μ A, C SOFT
is calculated as:
(EQ. 3)
Choosing 0.015 μ F will guarantee 10mV/ μ s SLEWRATE at
minimum I GV value. This choice of C SOFT controls the start-
up slew rate as well. One should expect the output voltage to
slew to the Boot value of 1.2V at a rate given by Equation 4:
(EQ. 4)
μ s
Selecting Rbias
To properly bias the ISL6261A, a reference current needs to be
derived by connecting a 147k, 1% tolerance resistor from the
RBIAS pin to ground. This provides a very accurate 10 μ A
current source from which OCSET reference current is derived.
Caution should be used during layout. This resistor should
be placed in close proximity to the RBIAS pin and be
connected to good quality signal ground. Do not connect any
other components to this pin, as they will negatively impact
the performance. Capacitance on this pin may create
instabilities and should be avoided.
17
Start-up Operation - CLK_EN# and PGOOD
The ISL6261A provides a 3.3V logic output pin for
CLK_EN#. The system 3.3V voltage source connects to the
3V3 pin, which powers internal circuitry that is solely devoted
to the CLK_EN# function. The output is a CMOS signal with
4mA sourcing and sinking capability. CMOS logic eliminates
the need for an external pull-up resistor on this pin,
eliminating the loss on the pull-up resistor caused by
CLK_EN# being low in normal operation. This prolongs
battery run time. The 3.3V supply should be decoupled to
digital ground, not to analog ground, for noise immunity.
At start-up, CLK_EN# remains high until 13 clock cycles
after the core voltage is within 20mV of the boot voltage. The
ISL6261A triggers an internal timer for the IMVP6_PWRGD
signal (PGOOD pin). This timer allows PGOOD to go high
approximately 7ms after CLK_EN# goes low.
Static Mode of Operation - Processor Die Sensing
Remote sensing enables the ISL6261A to regulate the core
voltage at a remote sensing point, which compensates for
various resistive voltage drops in the power delivery path.
The VSEN and RTN pins of the ISL6261A are connected to
Kelvin sense leads at the die of the processor through the
processor socket. (The signal names are Vcc_sense and
Vss_sense respectively). Processor die sensing allows the
voltage regulator to tightly control the processor voltage at
the die, free of the inconsistencies and the voltage drops due
to layouts. The Kelvin sense technique provides for
extremely tight load line regulation at the processor die side.
FN6354.3
November 5, 2009
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相关代理商/技术参数 |
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| ISL6261AEVAL2Z | 功能描述:EVAL BOARD 2 FOR ISL6261A RoHS:是 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 |
| ISL6261AIRZ | 功能描述:DC/DC 开关控制器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| ISL6261AIRZ-T | 功能描述:DC/DC 开关控制器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| ISL6261CR7Z | 功能描述:IC CTRLR BUCK 1PHASE 48-VFQFN EP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6261CR7Z-T | 功能描述:IC CTRLR BUCK 1PHASE 48-VFQFN-EP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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