Diodes AP3436/A Manuel d'utilisateur télécharger pdf

AP3436/A

Document number: DS37212 Rev. 2 - 2

1 of 15

www.diodes.com

April 2014

AP3436/A

A Product Line of

Diodes Incorporated

3A, 1.25MHz High Performance Synchronous Buck Converter

Description

The AP3436/A is a step-down DC-DC converter with integrated

power stage capable of driving up to 3A continuous output current. It

integrates 2 N-channel power MOSFETs with low on-resistance.

Current mode control provides fast transient response and cycle-by-

cycle current limit.

For AP3436, the regulator adopts current-mode in forced pulse-width

modulation (PWM) mode with 1.25MHz switching frequency

internally, which allows small-sized components, such as capacitors

and inductors. This feature greatly simplifies the design of switch-

mode power supplies. Under PWM mode, the device remains at the

fixed PWM operation (typical at 1.25MHz), regardless of if the load

current is high or low.

For AP3436A, the regulator operates in either fixed PWM mode or a

pulse-skipping modulation (PSM) mode depending on the different

load conditions. The device can operate at typical 1.25MHz fixed

switching frequency under heavy load condition. At light load, the

regulator enters a PSM mode to minimize the switching loss by

reducing the switching frequency.

The AP3436/A provides EN function. Pulling this pin high statically

enables the device while pulling the pin low statically for longer than

10μs will shut it down.

Under Voltage Lockout is internally set at 2.75V for V

detection.

The output voltage startup ramp is controlled by the soft start. An

open drain power good signal indicates the output is within 75% to

125% of its nominal voltage.

The AP3436/A is available in U-DFN3030-10 package.

Applications

 Desktop & Notebook

 Low Voltage, High Density Power System

 Consumer Application Such as Set Top Box, LCD Display and

CPE Equipment

Pin Assignments

(Top View)

U-DFN3030-10

Features

 Analog Power Input V

Range: 3.0V to 5.5V

 Power Input V

Range: 1.3V to 5.5V

 0.6V Reference Voltage with ±1.5% Precision

 2 MOSFETs (Typ 50mΩ) for High Efficiency at 3A Loads

 High Efficiency: Up to 95%

 Output Current: 3A

 Current Mode Control

 Built-in Soft Start Function

 UV and OV Power Good Output

 Built-in UV and OV Protection Function

 Built-in Over Current Protection

 Built-in Thermal Shutdown Function

 Thermally Enhanced 3mm×3mm DFN Package

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

GND

VCC

VIN

GND

BOOT

PGOOD

Pin 1 Mark

5 6

1 2 3 4 5 6 ... 14 15

Résumé du contenu

AP3436/A Document number: DS37212 Rev. 2 - 2 1 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 2

AP3436/A Document number: DS37212 Rev. 2 - 2 10 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorpora

Page 3 - Functional Block Diagram

AP3436/A Document number: DS37212 Rev. 2 - 2 11 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorpora

Page 4

AP3436/A Document number: DS37212 Rev. 2 - 2 12 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorpora

Page 5 - Electrical Characteristics (V

AP3436/A Document number: DS37212 Rev. 2 - 2 13 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorpora

Page 6

AP3436/A Document number: DS37212 Rev. 2 - 2 14 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorpora

Page 7 - Temperature (

AP3436/A Document number: DS37212 Rev. 2 - 2 15 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorpora

Page 8

AP3436/A Document number: DS37212 Rev. 2 - 2 2 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 9

AP3436/A Document number: DS37212 Rev. 2 - 2 3 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 10 - Application Information

AP3436/A Document number: DS37212 Rev. 2 - 2 4 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 11

AP3436/A Document number: DS37212 Rev. 2 - 2 5 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 12

AP3436/A Document number: DS37212 Rev. 2 - 2 6 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 13 - 1 IDENTIFICATION

AP3436/A Document number: DS37212 Rev. 2 - 2 7 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 14

AP3436/A Document number: DS37212 Rev. 2 - 2 8 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Page 15

AP3436/A Document number: DS37212 Rev. 2 - 2 9 of 15 www.diodes.com April 2014 © Diodes Incorporated AP3436/A A Product Line of Diodes Incorporat

Commentaires sur ces manuels

Pas de commentaire

Diodes AP3436/A Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Diodes AP3436/A. Diodes AP3436/A User Manual [de] Manuel d'utilisatio

Résumé du contenu

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Diodes AP3436/A