PM6686TR datasheet(1/50 Pages) STMICROELECTRONICS

부품명	PM6686TR

상세설명	Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook

PDF	50 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

Logo

1 / 50 page

July 2009

Doc ID 15281 Rev 4

1/50

50

PM6686

Dual step-down controller with adjustable voltages, adjustable LDO

and auxiliary charge pump controller for notebook

Features

■ 5.5 V to 28 V input voltage range

■ Dual fixed OUT1 = 1.5 V/5 V and OUT2 =

1.05 V / 3.3 V outputs or adjustable OUT1 = 0.7

V to 5.5 V and OUT2 = 0.7 V to 2.5 V outputs,

± 1.5% accuracy over valley regulation

■ Low-side MOSFETs' RDS(on) current sensing

and programmable current limit

■ Constant ON-time control

■ Frequency selectable

■ Soft-start internally fixed at 2 ms and soft-stop

■ Selectable pulse skipping at light loads

■ Selectable minimum frequency (33 kHz) in

pulse skip mode

■ Independent Power Good and EN signals

■ Latched OVP and UVP

■ Charge pump feedback

■ Fixed 3.3 V/5.0 V, or adjustable output 0.7 V to

4.5 V, ± 1.5% (LDO): 200 mA

■ 3.3 V reference voltage ± 2.0%: 5 mA

■ 2.0 V reference voltage ± 1.0%: 50 µA

Applications

■ Notebook computers

■ Main (3.3 V/5 V), chipset (1.5 V/1.05 V),

DDR1/2/3, graphic cards power supply

■ PDAs, mobile devices, tablet PC or slates

■ 3-4 cells Li+ battery powered devices

Description

PM6686 is a dual step-down controller specifically

designed to provide extremely high efficiency

conversion, with lossless current sensing

technique. The constant on-time architecture

assures fast load transient response and the

embedded voltage feed-forward provides nearly

constant switching frequency operation. Pulse

skipping technique increases efficiency at very

light load. Moreover a minimum switching

frequency of 33 kHz is selectable to avoid audio

noise issues. The PM6686 provides a selectable

switching frequency, allowing three different

values of switching frequencies for the two

switching sections. The output voltages OUT1

and OUT2 can be programmed to regulate

1.5 V/5 V and 1.05 V/3.3 V outputs respectively or

can deliver two adjustable output voltages. An

optional external charge pump can be monitored.

This device embeds a linear regulator that can

provide 3.3 V/5 V or an adjustable voltage from

0.7 V to 4.5 V output. The linear regulator

provides up to 100 mA output current. LDO can

be bypassed with the switching regulator outputs

or with an external power supply (switchover

function).

When in switchover, the LDO output can source

up to 200 mA.

VFQFPN-32 5 x 5 mm

Table 1.

Device summary

Order codes

Package

Packaging

PM6686

VFQFPN-32L 5 x 5 mm

Tray

PM6686TR

Tape and reel

www.st.com

유사한 부품 번호 - PM6686TR

제조업체	부품명	데이터시트	상세설명
STMicroelectronics	PM6686TR	1Mb / 50P	Constant ON-time control 23-Jul-2009

More results

유사한 설명 - PM6686TR

제조업체	부품명	데이터시트	상세설명
Maxim Integrated Produc...	MAX1717	501Kb / 32P	Dynamically Adjustable, Synchronous Step-Down Controller for Notebook CPUs 19-1636; Rev 0; 1/00
STMicroelectronics	PM6685	889Kb / 16P	DUAL STEP-DOWN CONTROLLER WITH AUXILARY VOLTAGES FOR NOTEBOOK SYSTEM POWER 23-Sep-2005
	PM6681A	474Kb / 12P	Dual step-down controller with adjustable LDO 02-Nov-2006
	PM6680	2Mb / 49P	No Rsense dual step-down controller with adjustable voltages for notebook system power 28-Aug-2007
	PM6680A	1Mb / 48P	Dual synchronous step-down controller with adjustable output voltages plus LDO 17-Dec-2007
	PM6680	2Mb / 49P	No Rsense dual step-down controller with adjustable voltages for notebook system power 21-Jan-2008
	PM6681A	2Mb / 47P	Dual synchronous step-down controller with adjustable LDO 26-Jun-2008
	AN2565	1Mb / 29P	PM6680A evaluation kit dual step-down controller with auxiliary voltages 07-Apr-2008
	AN2833	2Mb / 32P	Dual step-down controller with auxiliary voltages for industrial system power 24-Feb-2009
Global Mixed-mode Techn...	G5601A	66Kb / 1P	High-Speed Step-Down Controller with LDO Controller for Notebook Computer

More results

PM6686TR 데이터시트(PDF) 1 Page - STMicroelectronics

PM6686TR 데이터시트(HTML) 1 Page - STMicroelectronics

유사한 부품 번호 - PM6686TR

유사한 설명 - PM6686TR

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

데이터시트 다운로드

링크 URL