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参数资料
| 型号： | ISL6271ACR |
| 厂商： | Intersil |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC REG PMIC 1BUCK 2LDO 20-QFN |
| 标准包装： | 75 |
| 应用： | 处理器 |
| 电流 - 电源： | 380µA |
| 电源电压： | 2.76 V ~ 5.5 V |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 管件 |
ISL6271A
I 2 C SEND BYTE PROTOCOL
SLEW
VOLTAGE
SET
Application Guidelines
Every effort should be made to place the ISL6271A as close
S
0 0 0 1 1 0 0 0 0 X
X D5 D4 D3 D2 D1 D0 0
P
as possible to the processor, with the orientation favoring the
START A6 A5 A4 A3 A2 A1 A0 W A
SLAVE ADDRESS
I 2 C RECEIVE BYTE PROTCOL
COMMAND BYTE
A STOP
shortest voltage routing. The regulator input capacitors
should be located close to their respective input pins.
All output capacitors should be kept close to their respective
output pins with the ground pins connected immediately to
S
0 0 0 1 1 0 0
1 0 D7 D6 D5 D4 D3 D2 D1 D0 1
P
the ground plane. Care should be taken to avoid routing
START A6 A5 A4 A3 A2 A1 A0 W A
SLAVE ADDRESS
DATA BYTE
A STOP
sensitive, high impedance signals near the PHASE pin on
the controller, and the attendant PCB traces.
To minimize switching noise, it is important to keep the loop
FIGURE 18. INTERFACE BIT DEFINITION AND PROTOCOL
VID and Slew Rate Program Register
In a typical XScale configuration, the processor ’s “Power
Manager” will issue the voltage and slew rate commands to
the ISL6271A over its PWR_ I 2 C bus after the ISL6271A
acknowledges its address. The data byte is composed of two
pieces of ‘set’ information: The prescribed voltage level
embedded in bits D0-D3, and the prescribed transition slew
rate (from the previous voltage to the target voltage)
embedded in bits D4-D5. Each set of bits is transmitted MSB
first. This protocol is depicted in Figure 18.
area associated with the phase node and output filter as
short as possible. It is also important that the input voltage
decoupling capacitor C7 be located as close to the PVCC
pin as possible and that it has a low impedance return path
to the PGND pin. In general a good approach to layout is to
consider how switching current flows in a circuit, and to
minimize the loop area associated with this current. In the
case of the switching regulator, current flows from C7
through the internal upper P-MOSFET, to the load through
the output filter and back to the PGND pin. To maximize the
effectiveness of any decoupling capacitor, minimize the
parasitic inductance between the capacitor and the circuit it
is decoupling. Notice that Figure 19 illustrates the SIGNAL
ground with RED highlighting. All components associated
with these terminals should be tied together first. Be sure to
make only one connection between this net and the PGND
pin to avoid ground loops and noise injection points into
sensitive analog circuitry.
BBAT ≤ VCC
COIN CELL
BACK-UP
Li-ion
4.2V
TO
2.60V
R7, 10 ?
C3
0.1μF
C7
10μF
BBAT
PVCC
VCC
ISL6271A
SCL/VID0
SDA/VID1
PGOOD
BFLT#
EN
5k ?
5k ?
5k ?
XScale μP
PWR_I2C
FAULT
REG. EN
1.8V
OR 2.5V
C4
10nF
X7R
C2
2.2μF
LVCC
SOFT
VSRAM
VPLL
FB
C8
2.2μF
X5R
Rcomp, 50K
C5
2.2μF
X5R
VCC_SRAM
VCC_PLL
VCC_CORE
VIDEN
VID2
VOUT
VID3
GND
PHASE
PGND
L1
4.7μH
C6
10μF
X5R
Single point connection
between PGND and GND pins
Power ground. Minimize the loop area associated
with L1, C6 and the PHASE and PGND pins.
FIGURE 19. TYPICAL APPLICATION CIRCUIT
11
FN9171.1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6271ACR-T | 功能描述:IC PMIC XSCALE PROCESSOR 20-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| ISL6271ACRZ | 功能描述:直流/直流开关调节器 LD PLL & SRAMG FOR I NTEL PROCESSORS IBM 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 |
| ISL6271ACRZ-T | 功能描述:直流/直流开关调节器 LD PLL & SRAMG FOR I NTEL PROCESSORS IBM 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 |
| ISL6271AEVAL1 | 功能描述:EVALUATION BOARD FOR ISL6271A RoHS:否 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 |
| ISL6271CR | 制造商:Rochester Electronics LLC 功能描述:PLL & SRAM REGULATOR FOR INTEL PROCESSORS - Bulk 制造商:Intersil Corporation 功能描述: |
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