Diodes AP3418 Manuel d'utilisateur télécharger pdf

AP3418

Document number: DS37233 Rev. 2 - 2

1 of 11

www.diodes.com

April 2014

AP3418

A Product Line of

Diodes Incorporated

1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter

Description

The AP3418 is a 1.4MHz fixed frequency, current mode, PWM

synchronous buck (step-down) DC-DC converter, capable of driving a

1.5A load with high efficiency, excellent line and load regulation. The

device integrates synchronous P-channel and N-channel power

MOSFET switches with low on-resistance. It is ideal for powering

portable equipment that runs from a single Li-ion battery.

A standard series of inductors are available from several different

manufacturers optimized for use with the AP3418. This feature greatly

simplifies the design of switch-mode power supplies.

The AP3418 is available in SOT25 package.

Features

 Input Voltage Range: 2.5V to 5.5V

 Output Voltage: 0.6V to V

 ADJ Output

 Fixed 1.4MHz Frequency

 High Efficiency up to 95%

 Output Current: 1.5A

 Current Mode Control

 100% Duty Cycle in Dropout

 Built-in Over Current Protection

 Built-in Short Circuit Protection

 Built-in Thermal Shutdown Protection

 Built-in UVLO Function

 Built-in Soft-start

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

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

Pin Assignments

(Top View)

SOT25

Applications

 LCD TV

 Set-top Box

 Datacom

 Portable Device

 Smart Phone

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.

Typical Applications Circuit

AP3418-ADJ

OUT

R2 R1

OUT

4.7F

2.2H

22F

VIN

GND

3 4

GND

VIN

1 2 3 4 5 6 ... 10 11

Résumé du contenu

Page 1 - AP3418-ADJ

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Page 2 - Functional Block Diagram

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Page 3

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Page 4 - Electrical Characteristics (V

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Page 5 - Switch Current Limit (A)

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Page 6 - Temperature (

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Page 7 - = 1.5A)

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Page 9

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Page 10

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Page 11 - Diodes Incorporated

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