www.diodes.com

Announcement

New Product

diodes.com

The AP61204Q is a 2A, automotive-

compliant, synchronous buck converter

with a wide input voltage range of 2.4V

to 5.5V.

It integrates a 70mΩ high-side power

MOSFET and a 50mΩ low-side power

MOSFET to provide high-efficiency

stepdown DC-DC conversion.

The AP61204Q has a power-good

output that warns the system of irregular

conditions, and can be used in

sequencing control applications.

The device minimizes external

component count due to its adoption of

constant on-time (COT) control to

achieve fast transient response, easy

loop stabilization, and low output voltage

ripple.

The AP61204Q uses an enable (EN) pin

to select whether it works in a forced-

PWM mode for all loads, or switches to

PFM at lighter loads.

It is available in a SOT563 package, and

is pin compatible with its 600mA, 1A,

and 3A counterparts

.

Automotive-compliant - AEC qualified, manufactured

infacilities certified to IATF 16949, supporting PPAP

documents.

The Diodes logo is a registered trademark of Diodes

Incorporated in the United States and other countries.

All other trademarks are the property of their respective

owners.

© 2025 Copyright Diodes Incorporated. All Rights

Reserved.

5.5V, 2A, Low IQ, Synchronous Buck Converter in Tiny

SOT563 for Protected Point-of-Load Automotive Rails

AP61204Q

Applications

Automotive 3.3V and 5V point-of-load in:

▪ Automotive infotainment

▪ Automotive clusters

▪ Automotive telematics

▪ Advanced driver assistance

systems (ADAS)

The DIODES Advantage

The AP61204Q provides a high-efficiency, small foot-print

DC-DC buck converter solution for automotive

applications.

▪ 2.4V to 5.5V Operating Voltage Range

Covers both 3.3V and 5V rail conversion to core voltage

▪ Low (19µA) Quiescent Current (I

Q)

Maximizes light-load efficiency

▪ PWM/PFM Adjustable Mode Control via EN Pin

Supports fixed fSW and light-load high-efficiency (LLHE) PFM

mode

▪ Accurate ±5% PG with Internal 5MΩ Pull-Up Option

Provides over- and undervoltage warning with reduced BOM

▪ 1kΩ Soft Output Discharge

Ensures that there is no residue charge on output

▪ High Operating Frequency of 2.4MHz

Reduces external inductor/capacitor size and above medium

wave band

August 2025