AN2816 datasheet(1/36 Pages) STMICROELECTRONICS

Part #	AN2816

Description	High-efficiency step-down controller

PDF	36 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

1 / 36 page

August 2008

Rev 1

1/36

AN2816

Application note

High-efficiency step-down controller

with embedded 2 A LDO regulator

Introduction

The PM6675S device consists of a single, high-efficiency step-down controller and an

independent low dropout (LDO) linear regulator.

The constant on-time (COT) architecture assures fast transient response supporting both

electrolytic and ceramic output capacitors. An embedded integrator control loop

compensates the DC voltage error due to the output ripple.

Selectable low-consumption mode allows the highest efficiency over a wide range of load

conditions. The low-noise mode sets the minimum switching frequency to 33 kHz for audio-

sensitive applications. The LDO linear regulator can sink and source up to 2 Apk. Two fixed

current limits (±1 A and ±2 A) can be chosen.

An active soft-end is independently performed on both the switching and the linear

regulators outputs when disabled.

Figure 1.

PM6675S demonstration board

AM01000v1

www.st.com

Similar Part No. - AN2816

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	AN2810	578Kb / 17P	6-row 85 mA LED driver with boost 26-May-2009
	AN2811	1Mb / 25P	High brightness LEDs are becoming a prominent source of lighting 16-Jun-2009
	AN2813	380Kb / 25P	TDE1708DFT in IO-Link applications 09-Feb-2011
	AN2815	2Mb / 42P	High-efficiency step-down controller 20-Aug-2008
	AN2818	649Kb / 24P	NiMH battery charger demonstration board through USB based on the ST7FLIT15BY0 02-Apr-2009

Manufacturer	Part #	Datasheet	Description
Linear Technology	LT1432	611Kb / 28P	5V High Efficiency Step-Down Switching Regulator Controller
List of Unclassifed Man...	SS6578	221Kb / 11P	HIGH EFFICIENCY STEP DOWN DC/DC CONTROLLER
Semtech Corporation	SC4602A	353Kb / 18P	High Efficiency Synchronous, Step Down Controller
Eutech Microelectronics...	EUP7117	108Kb / 1P	High Efficiency, Synchronous Step-Down Controller
Silicon Standard Corp.	SS6578	226Kb / 11P	High-Efficiency, Step-Down DC/DC Controller
Rohm	BD9775FV	426Kb / 15P	High Efficiency Step-down Switching Regulator Controller
Analog Devices	ADP1147	203Kb / 12P	High Efficiency Step-Down Switching Regulator Controller REV. 0
STMicroelectronics	AN2815	2Mb / 42P	High-efficiency step-down controller 20-Aug-2008
Linear Technology	LT1432	833Kb / 28P	5V High Efficiency Step-Down Switching Regulator Controller
ON Semiconductor	LV5068V	119Kb / 6P	high efficiency Step-down Switching Regulator Controller August, 2013