AP3598A Datasheet, PDF (1/28 Pages) Diodes Incorporated – COMPACT DUAL-PHASE SYNCHRONOUS-RECTIFIED BUCK CONTROLLER

Description
A Product Line of
Diodes Incorporated
AP3598A
COMPACT DUAL-PHASE SYNCHRONOUS-RECTIFIED BUCK CONTROLLER
Pin Assignments
The AP3598A is a dual-phase synchronous buck PWM controller with
integrated drivers which are optimized for high performance graphic
card and computer applications. The IC is capable of delivering up to
60A output current capability, supporting 12V MOSFET drivers with
internal bootstrap diodes.
The dynamic output voltage could be implemented by analog method
with a switching device and a resistor network. The adjustable current
balance is achieved by RDS(ON) current sensing technique.
The AP3598A provides over current protection, input/output under
voltage protection, over voltage protection and over temperature
protection.
Other features include adjustable soft start, adjustable operation
frequency and so on. With aforementioned functions, the IC adopts U-
QFN4040-24 package.
(Top View)
Pin 1 Mark
24 23 22 21 20 19
BOOT1 1
HGATE1 2
EN 3
PSI 4
VID 5
REFADJ 6
THERM/
GND
25
18 BOOT2
17 HGATE2
16 PGOOD
15 VCC
14 TALERT#
13 TSNS
7 8 9 10 11 12
Features
 Operate with Single Supply Voltage
 Reference Voltage Output with 1% Accuracy
 Simple Single Loop Voltage Mode Control
 12V Bootstrapped Drivers with Internal Boot-strap Diodes
 Adjustable Current Balancing by RDS(ON) Current Sensing
 Adjustable Operation Frequency from 200kHz to7500kHz Per
Phase
 External Compensation
 Dynamic Output Voltage Adjustment
 Adjustable Soft Start
 Built-in UV and OV Protection Function
 Built-in Over Current Protection
 Built-in Thermal Shutdown Function
 U-QFN4040-24 Package
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
Applications
U-QFN4040-24
 Middle-High End Graphic Card
 Generic Desktop and Consumer Electronics
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.
AP3598A
Document number: DS37261 Rev. 2 - 2
1 of 28
www.diodes.com
November 2014
© Diodes Incorporated