Diodes AP3585A/B/C Manuel d'utilisateur télécharger pdf

AP3585A/B/C

Document number: DS36819 Rev. 1 - 2

1 of 18

www.diodes.com

January 2014

AP3585A/B/C

Product Line o

Diodes Incorporated

NEW PRODUCT

SINGLE PHASE SYNCHRONOUS BUCK PWM CONTROLLER

Description

The AP3585A/B/C is a compact synchronous-rectified buck controller

specifically designed to operate from 4.5V to 13.2V supply voltage

and deliver high-quality output voltage as low as 0.8V (AP3585A) or

0.6V (AP3585B/C). This SO-8EP device operates at fixed

300kHz/200kHz frequency and provides an optimal level of

integration to reduce size and cost of the power supply.

This controller integrates internal MOSFET drivers that support

12V+12V bootstrapped voltage for high- efficiency power conversion.

The bootstrap diode is built-in to simplify the circuit design and

minimize external part count.

This controller provides single feedback loop, voltage-mode control

with fast transient response. The error amplifier features a 10MHz

gain-bandwidth product and 6V/μs slew rate which enables high

converter bandwidth for fast transient performance.

Other features include internal soft-start, under voltage protection,

over current protection and shutdown function. With afore mentioned

functions, this part provides customers a compact, high efficiency,

well-protected and cost-effective solution.

The AP3585A/B/C is available in SO-8 and SO-8EP packages.

Features

 Supply Voltage: 4.5V to 13.2V

Input Range: 3.3V to 12V

0.8V/0.6V to 80% of V

Output Range

Internal Reference: 0.8V/0.6V

 Simple Single-loop Control

Voltage-mode PWM Control

Duty Cycle: 0% to 80%

Fast Transient Response

 10MHz High-bandwidth Error Amplifier with 6V/μs Slew Rate

 Fixed Oscillator Frequency: 300kHz/200kHz

 Lossless, Programmable Over Current Protection

(Uses Lower MOSFET R

DS(ON)

)

 Start-up into Pre-biased Load

 Built-in Thermal Shutdown

 Built-in Soft-start

 Over Current Protection

 Over Voltage Protection

 Under Voltage Protection

 Integrated Boot Diode

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

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

Pin Assignments

(Top View)

(SO-8/ M Package)

(Top View)

(SO-8EP/ MP Package)

Applications

 Subsystem Power Supplies

PCI, AGP, Graphics Cards, Digital TV

SSTL-2 and DDR/2/3 SDRAM Bus Termination Supply

 Cable Modems, Set Top Boxes, and DSL Modems

 Industrial Power Supplies and General Purpose Supplies

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.

BOOT

UGATE

GND

PHASE

COMP/EN

VCC

LGATE/OCSET

BOOT

UGATE

GND

LGATE/OCSET

PHASE

COMP/EN

VCC

Exposed

Pad

1 2 3 4 5 6 ... 17 18

Résumé du contenu

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Page 3 - Functional Block Diagram

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Page 6 - January 2014

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Page 10 - MOSFET sidelowtheofR

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Page 11 - NEW PRODUCT

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Page 13 - Marking Information (Cont.)

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