STMicroelectronics AN2815 Application Note PM6675AS High-Efficiency Step-Down Controller

The PM6675AS is a high-efficiency step-down controller with an embedded 2A LDO regulator. It features fast transient response, selectable low-consumption mode, and low-noise mode.

Brand: STMicroelectronics
Category: Power Management
Document type: Application Note
Language: English
Pages: 42
File format: PDF
File size: 2.5 MB
Published: 06 August, 2012
Updated: 28 September, 2023
Model: PM6675AS
MD5 checksum: 5828748E6E12A13980AAE581191AD063
PDF: STMicroelectronics AN2815 Application Note PM6675AS High-Efficiency Step-Down Controller PDF

About this manual

The document details the PM6675AS device, which combines a single high-efficiency step-down controller with an independent low dropout (LDO) linear regulator. It features a constant on-time (COT) architecture for fast transient response and supports both electrolytic and ceramic output capacitors.

What's inside

Main features
Switching section
LDO section
Bill of material
Component assembly and layout
VO interface
Configuration
Test setup
Getting started
Demonstration tests

Specifications

Input voltage range	4.5 V to 36 V
Fixed output voltage	1.5 V
Adjustable output voltage range	0.6 V to 3.3 V
LDO current limit options	+1 A or +2 A
Soft-start time	3 ms

Frequently asked questions

What is the switching frequency in non-audible pulse-skip mode?

The minimum switching frequency is set to 33 kHz for audio-sensitive applications.

Does the PM6675AS support ceramic output capacitors?

Yes, it supports all ceramic output capacitor applications.

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