AP3595

Document number: DS36749 Rev. 1 - 2

10 of 23

www.diodes.com

January 2014

© Diodes Incorporated

AP3595

A Product Line of

Diodes Incorporated

VID Change

Application Information

1. Overview

AP3595 is a dual-phase synchronous-rectified buck controller designed to deliver high quality output voltage for high power applications. It is

capable of delivering up to 60A output current with embedded bootstrapped drivers that support 12V+12V driver capability. 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. The adjustable current

AP3595 features comprehensive protection functions including 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 quick response to step load transient. With aforementioned

functions, the IC provides customer a compact, high efficiency, well-protected and cost effective solution.

2. Power on Reset

A Power On Reset (POR) circuitry continuously monitors the supply voltage at VCC. Once the rising POR threshold is exceeded, the AP3595 sets

itself to active state and is ready to accept chip enable command. The rising POR threshold is typically 9V.

3. Soft Start

The AP3595 initiates its soft start cycle when the RT/EN pin is released from ground once the POR is granted as shown in Figure 1.

5V/div

Time 2ms/div

200mV/div