Description

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.

Feature(s)

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
Halogen and Antimony Free. “Green” Device

Application(s)

Middle-High End Graphic Card
Generic Desktop and Consumer Electronics

Specifications & Technical Documents

Product Parameters

Efficiency (%)	88
Frequency (Hz)	200K to 500K
MaximumInput Voltage (V)	13.2
MinimumInput Voltage (V)	4.5
Output Voltage (V)	ADJ
Type	Buck

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products

AP3598A (Obsolete)