PM6675STR datasheet(2/53 Pages) STMICROELECTRONICS

Part #	PM6675STR

Description	High efficiency step-down controller with embedded 2 A LDO regulator

Download	53 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

2 / 53 page

Contents

PM6675S

2/53

Contents

1

Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2

Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3

Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1

Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2

Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3

Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5

Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7

Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.1

Switching section - constant on-time PWM controller . . . . . . . . . . . . . . . 20

7.1.1

Constant-On-Time architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

7.1.2

Output ripple compensation and loop stability . . . . . . . . . . . . . . . . . . . . 23

7.1.3

Pulse-skip and no-audible pulse-skip modes . . . . . . . . . . . . . . . . . . . . . 27

7.1.4

Mode-of-operation selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.1.5

Current sensing and current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.1.6

POR, UVLO and Soft Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.1.7

Switching section power good signal . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.1.8

Switching section output discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.1.9

Gate drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.1.10

Reference voltage and bandgap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.1.11

Switching section OV and UV protections . . . . . . . . . . . . . . . . . . . . . . . 33

7.1.12

Device thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Similar Part No. - PM6675STR

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	PM6675	656Kb / 47P	Very fast load transient response using constant on-time control loop January 2007 Rev 1
	PM6675A	265Kb / 15P	Latched OVP and UVP October 2006 Rev 1
	PM6675AS	2Mb / 48P	High efficiency step-down controller with embedded 2 A LDO regulator
	PM6675ASTR	2Mb / 48P	High efficiency step-down controller with embedded 2 A LDO regulator

More results

Similar Description - PM6675STR

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	PM6675AS	2Mb / 48P	High efficiency step-down controller with embedded 2 A LDO regulator
STMicroelectronics	STEVAL-ISB002V1	122Kb / 4P	High efficiency step-down controller demonstration board with embedded 2 A LDO regulator based on the ST72F324L November 2010 Rev 1
Analog Devices	ADP1147	203Kb / 12P	High Efficiency Step-Down Switching Regulator Controller REV. 0
ON Semiconductor	LV5068V	119Kb / 6P	high efficiency Step-down Switching Regulator Controller August, 2013
Rohm	BD9775FV	426Kb / 15P	High Efficiency Step-down Switching Regulator Controller
Linear Technology	LT1432	611Kb / 28P	5V High Efficiency Step-Down Switching Regulator Controller
	LT1432	833Kb / 28P	5V High Efficiency Step-Down Switching Regulator Controller
	LT1432-3.3	275Kb / 8P	3.3V High Efficiency Step-Down Switching Regulator Controller
	LT1432-3.3	269Kb / 8P	3.3V High Efficiency Step-Down Switching Regulator Controller
STMicroelectronics	AN2816	2Mb / 36P	High-efficiency step-down controller

More results

PM6675STR Datasheet(PDF) 2 Page - STMicroelectronics

PM6675STR Datasheet(HTML) 2 Page - STMicroelectronics

Similar Part No. - PM6675STR

Similar Description - PM6675STR

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 51 52 53

Datasheet Download

Link URL