ISL6411EVAL1【PDF 1/8 页】EVALUATION BOARD ISL6411

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Using the ISL6411 Triple LDO Controller

Evaluation Board

PRELIMINARY

Application Note

October 2003

AN1036

Author: Manisha Pandya

Introduction

The ISL6411 integrates three ultra low noise, low dropout

linear regulators providing a highly integrated single-chip

solution for 802.11 wireless chipset architectures. It operates

from 3.0V to 3.8V input and provides preset output voltages -

LDO1 set at 1.8V, LDO2 and LDO3 set at 2.84V.

The device features power sequencing specifically for

wireless chipsets. The outputs are sequenced such that

LDO1, the 1.8V core regulator voltage, is always within

regulation before LDO2, the 2.84V output LDO, is

sequenced on. When powering down, power to the 2.84V

LDO2 is removed before the 1.8V LDO1 core regulator is

sequenced off.

Designed with an internal P-channel MOSFET pass

transistor, the ISL6411 operates with a low supply current.

An output fault detection circuit indicates loss of regulation

on any of the three outputs. Other features include a logic

controlled shutdown mode, short circuit and thermal

shutdown protection, and reverse battery protection.

The ISL6411 also includes a RESET function. Integration of

this function into the ISL6411 eliminates the additional

RESET IC and external support components required in

wireless chipset power supply applications. The IC asserts a

RESET signal whenever the V CC (IN) supply voltage drops

below a preset threshold, keeping it asserted for at least

100ms after V CC (IN) has risen above the reset threshold.

Two RESET outputs are provided; RESET is a push-pull

active-LOW output, while RESET is an active-HIGH output.

Applications

? PRISM? 3 Chipsets – ISL37106P

? WLAN Cards

- PCMCIA, Cardbus32, MiniPCI Cards

- Compact Flash Cards

? Liberty Chipset

ISL6411 Reference Design

TABLE 1. ISL6411 EVALUATION BOARD

Quick Start Evaluation

The evaluation board is shipped “ready to use” right from the

box. The board accepts a 3.3V input from a standard power

supply. The output can be exercised through the use of an

external load.

There are posts available on the board for introducing power

to the board and for drawing current from the regulated

outputs. Post connectors are also available to monitor power

good conditions FAULT (P11), RESET (P9) and RESET

(P10). Posts for Shutdown functions SHDN (P12) and

SHDN3 (P13) allows low power mode function testing.

Each evaluation board kit is sent with 5 samples of

ISL6411CR.

Recommended Test Equipment

To test the functionality of the ISL6411, the following

equipment is recommended:

? An adjustable 0V - 5V, 2A capable bench power supply

? An electronic load

? A Four channel oscilloscope with probes

? A Precision digital multimeter

Power and Load Connections

Input Voltage - Connect the positive lead of the adjustable

bench power supply to the 3.3V post (P3). Connect the

ground lead of the supply to GND post (P4).

Output Voltages - The ISL6411EVAL1 provides fixed

output voltages for use in Wireless Chipset applications.

Internal trimmed resistor networks inside the chip set the

nominal output voltages as below:

V OUT1 = 1.8V (P5)

V OUT2 = 2.84V (P7)

V OUT3 = 2.84V (P1)

The outputs can be exercised through external load on

connectors. The maximum currents are V OUT1 - 500mA,

V OUT2 - 300mA and V OUT3 -200mA.

BOARD NAME

IC PART NUMBER

PACKAGE

Output Loading, Sourcing Current - To load the V OUT1

output connect the positive lead of the electronic load to the

ISL6411EVAL1

ISL6411IR

16-Ld QFN

V OUT1 (P5) post and the return terminal of the same load

channel to the GND (P6) post. Similarly connect the positive

terminal of the second load channel to the V OUT2 (P7) post

and the return terminal to the GND (P8) post to load the

output of LDO2. The LDO3 output can be loaded by

connecting the positive terminal of a third channel of the

electronic load to the V OUT3 (P1) post and the return

terminal to the GND (P2) post.

1-888-INTERSIL or 321-724-7143

Intersil (and design) is a registered trademark of Intersil Americas Inc.

PRISM? 3 is a trademark of GlobespanVirata, Inc.

All other trademarks mentioned are the property of their respective owners.

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ISL6411IR-TK 制造商:Rochester Electronics LLC 功能描述:- Bulk

ISL6412IR 功能描述:IC REG LDO 1.8V/2.8V/2.8V 16-QFN RoHS:否类别:集成电路 (IC) >> PMIC - 稳压器 - 线性系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，可调式输出电压:1.2 V ~ 5.5 V 输入电压:1.7 V ~ 5.5 V 电压 - 压降（标准）:0.075V @ 400mA 稳压器数量:1 电流 - 输出:400mA（最小值）电流 - 限制（最小）:400mA 工作温度:-55°C ~ 125°C 安装类型:表面贴装封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:带卷 (TR) 其它名称:296-20789-2V62/06626-01XE

ISL6412IR-T5K 功能描述:IC REG LDO 1.8V/2.8V/2.8V 16-QFN RoHS:否类别:集成电路 (IC) >> PMIC - 稳压器 - 线性系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，可调式输出电压:1.2 V ~ 5.5 V 输入电压:1.7 V ~ 5.5 V 电压 - 压降（标准）:0.075V @ 400mA 稳压器数量:1 电流 - 输出:400mA（最小值）电流 - 限制（最小）:400mA 工作温度:-55°C ~ 125°C 安装类型:表面贴装封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:带卷 (TR) 其它名称:296-20789-2V62/06626-01XE

ISL6412IR-TK 功能描述:IC REG LDO 1.8V/2.8V/2.8V 16-QFN RoHS:否类别:集成电路 (IC) >> PMIC - 稳压器 - 线性系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，可调式输出电压:1.2 V ~ 5.5 V 输入电压:1.7 V ~ 5.5 V 电压 - 压降（标准）:0.075V @ 400mA 稳压器数量:1 电流 - 输出:400mA（最小值）电流 - 限制（最小）:400mA 工作温度:-55°C ~ 125°C 安装类型:表面贴装封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:带卷 (TR) 其它名称:296-20789-2V62/06626-01XE

ISL6412IRZ 功能描述:低压差稳压器 - LDO VER OF ISL6412IR RoHS:否制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20

ISL6412IRZ-TK 功能描述:低压差稳压器 - LDO VER OF ISL6412IR-T 1 000 PC RoHS:否制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20

ISL6413EVAL1 功能描述:EVALUATION BOARD ISL6413 RoHS:否类别:编程器，开发系统 >> 过时/停产零件编号系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB）传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否已供物品:成像器板已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP

ISL6413IR 功能描述:IC REG TRPL BCK/LINEAR 24-QFN RoHS:否类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2）功能:任何功能输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器电压/电流 - 输出 2:控制器电压/电流 - 输出 3:控制器带 LED 驱动器:无带监控器:无带序列发生器:是电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*

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