AP3595 Datasheet, PDF (1/23 Pages) Diodes Incorporated – DUAL PHASE SYNCHRONOUS RECTIFIED BUCK CONTROLLER

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Diodes Incorporated
AP3595
DUAL PHASE SYNCHRONOUS RECTIFIED BUCK CONTROLLER
Description
The AP3595 is a compact dual phase synchronous rectified buck
controller specifically designed to deliver high quality output voltage.
This device operates at adjustable operation frequency and is
capable of delivering up to 60A output current.
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.
The AP3595 features configurable gate driving voltage for maximum
efficiency and optimal performance. The built-in bootstrap diode
simplifies the circuit design and reduces external part count and PCB
space. The output voltage is precisely regulated to the reference input
that is dynamically adjustable by external voltage divider.
Other features include adjustable soft start, adjustable operation
frequency, and quick response to step-load transient. With afore-
mentioned functions, the IC provides customers a compact, high
efficiency, well-protected and cost-effective solution.
Pin Assignments
Pin 1 Mark
(Top View)
24 23 22 21 20 19
REFIN 1
18 VCC
VREF 2
RT/EN 3
IOFS 4
COMP 5
FB ⁶
EP
17 PVCC
16 LG1
15 PHASE1
14 HG1
13 _BOOT1
7 8 9 10 11 12
This IC is available in U-QFN4040-24 package.
U-QFN4040-24 (FN Package)
Features
 Operate with Single Supply Voltage
 Simple Single Loop Voltage Mode Control
 12V+12V Bootstrapped Drivers with Internal Bootstrap Diode
 Adjustable Over Current Protection by DCR
 Current Sensing
 Adjustable Current Balancing by RDS(ON) Current Sensing
 Adjustable Operation Frequency from 50kHz to 1MHz Per Phase
 External Compensation
 Dynamic Output Voltage Adjustment
 Adjustable Soft Start
 U-QFN4040-24 Package
 RoHS Compliant and 100% Lead (Pb)-free
 Totally Lead-free & Fully RoHS Compliant (Note1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
Applications
 Middle-High End GPU Core Power
 High End Desktop PC Memory Core Power
 Low Output Voltage, High Power Density
 DC-DC Converters
 Voltage Regulator Modules
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.
AP3595
Document number: DS36749 Rev. 1 - 2
1 of 23
www.diodes.com
January 2014
© Diodes Incorporated