Datasheet > ISL8009AEVAL1Z

ISL8009AEVAL1Z

更新时间： 2024-01-28 21:16:23

品牌	Logo	应用领域
英特矽尔 - INTERSIL		稳压器
页数	文件大小	规格书
5页	220K
描述
1.5A Synchronous Buck Regulator with Integrated MOSFETs

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ISL8009AEVAL1Z 数据手册

ISL8009AEVAL1Z: 1.5A Synchronous Buck

Regulator with Integrated MOSFETs

Application Note

October 9, 2008

AN1388.1

Description

Quick Setup Guide

1. Ensure that the circuit is correctly connected to the supply

and loads prior to applying any power.

The ISL8009AEVAL1Z kit is intended for use by individuals

with requirements for Point-of-Load applications sourcing

from 2.7V to 5.5V. The ISL8009EVAL1Z evaluation board

demonstrates the performance of the ISL8009A low

quiescent current mode converter.

2. Connect the bias supply to VIN. Plus terminal to P4(VIN)

and negative return to P5(GND).

3. Verify that position is ON for SW1.

4. Turn on the power supply.

The ISL8009A is offered in a 2mmx3mm 8 Ld DFN package

with 1mm maximum height. The complete converter

5. Verify the output voltage is 1.8V for V

OUT

occupies less than 1cm area.

Evaluating the Other Output Voltage

The ISL8009AEVALIZ kit output is preset to 1.8V; however,

output voltages can be adjusted from 0.8V to 3.3V by

following Equations 1 and 2:

Key Features

• High Efficiency Synchronous Buck Regulator With up to

95% Efficiency

⎛

⎞

⎟

⎠

(EQ. 1)

• 2ms Reset Timer

------

= 0.8 1 +

⎜

OUT

⎝

• Soft Discharge Output Cap During Disable

• 2.7V to 5.5V Supply Voltage

Let’s set R = 124kΩ:

(R )

------------------------------

• 3% Output Accuracy Over-Temperature/Load/Line

• 1.5A Guaranteed Output Current

• 17µA Quiescent Supply Current in PFM Mode

• Selectable Forced PWM Mode and PFM Mode

• Less Than 1µA Logic Controlled Shutdown Current

• 90% Maximum Duty Cycle for Lowest Dropout

• Internal Current Mode Compensation

• Internal Digital Soft-Start

(EQ. 2)

OUT

⎛

⎝

⎞

⎠

---------------

– 1

0.8

If desired output is 0.8V then short R and open R .

Mode Control

The ISL8009A has a SKIP pin that controls the operation

mode. When the SKIP pin is driven to low or shorted to

ground, the regulator operates in a forced PWM mode. The

forced PWM mode remains the fixed PWM frequency at light

load instead of entering the skip mode.

TABLE 1. SWITCH 1 SETTINGS

• Peak Current Limiting, Short Circuit Protection

• Over-Temperature Protection

SW1

SKIP

PWM

PFM

FUNCTION

Fixed PWM frequency at light load

Force continuous mode

• Enable

• Small 8 Ld 2mmx3mm DFN

• Pb-Free (RoHS Compliant)

SW2

ENABLE

OFF

ON/OFF CONTROL

Recommended Equipment

The following materials are recommended to perform

testing:

Disable V

OUT

Enable V

OUT

• 0V to 10V power supply with at least 5A source current

capability, battery, notebook AC adapter

• Two electronic loads capable of sinking current up to 5A

• Digital Multimeters (DMMs)

• 100MHz quad-trace oscilloscope

• Signal generator

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

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

12 3 4 5

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与ISL8009AEVAL1Z相关器件

型号	品牌	获取价格	描述	数据表
ISL8009AIRZ-T	INTERSIL	获取价格	1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator
ISL8009AIRZ-T	RENESAS	获取价格	1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator; DFN8; Temp R
ISL8009AIRZ-T7A	RENESAS	获取价格	1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator; DFN8; Temp R
ISL8009AIRZ-TK	RENESAS	获取价格	1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator; DFN8; Temp R
ISL8009IRZ-T	RENESAS	获取价格	2.4A SWITCHING REGULATOR, 1750kHz SWITCHING FREQ-MAX, PDSO8, 2 X 3 MM, ROHS COMPLIANT, PLA
ISL8010	INTERSIL	获取价格	Monolithic 600mA Step-Down Regulator with Low Quiescent Current
ISL8010_06	INTERSIL	获取价格	Monolithic 600mA Step-Down Regulator with Low Quiescent Current
ISL80101	INTERSIL	获取价格	High Performance 1A LDO
ISL80101_11	INTERSIL	获取价格	High Performance 1A LDO
ISL80101A	INTERSIL	获取价格	1A Ultra Low Dropout Linear Regulator

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