Datasheet Linear Technology LTC3546

Manufacturer	Linear Technology
Series	LTC3546

Dual Synchronous, 3A/1A or 2A/2A Configurable Step-Down DC/DC Regulator

Datasheets

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PDF, 624 Kb, Language: en, File uploaded: Mar 27, 2018, Pages: 30
Dual Synchronous, 3A/1A or 2A/2A Configurable Step-Down DC/DC Regulator

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Prices

Packaging

	LTC3546EFE#PBF	LTC3546EFE#TRPBF	LTC3546EUFD#PBF	LTC3546EUFD#TRPBF	LTC3546IFE#PBF	LTC3546IFE#TRPBF	LTC3546IUFD#PBF	LTC3546IUFD#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	FE	FE	UFD	UFD	FE	FE	UFD	UFD
Package Index	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28	28	28

Parametrics

Parameters / Models	LTC3546EFE#PBF	LTC3546EFE#TRPBF	LTC3546EUFD#PBF	LTC3546EUFD#TRPBF	LTC3546IFE#PBF	LTC3546IFE#TRPBF	LTC3546IUFD#PBF	LTC3546IUFD#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1086A,DC1087A	DC1086A,DC1087A	DC1086A,DC1087A	DC1086A,DC1087A	DC1086A,DC1087A	DC1086A,DC1087A	DC1086A,DC1087A	DC1086A,DC1087A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, Tracking, 100% Duty Cycle
Frequency, kHz	2250	2250	2250	2250	2250	2250	2250	2250
Frequency Adjust Range	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz
Frequency Sync Range	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz	750kHz - 4MHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Isupply, mA	0.16	0.16	0.16	0.16	0.16	0.16	0.16	0.16
Max Phases	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	2	2	2	2	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	2	2	2	2	2	2	2	2
Output Current 2, A	2	2	2	2	2	2	2	2
Polyphase	no	no	no	no	no	no	no	no
Switch Current, A	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2
Switch Current 2, A	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
Vin Min, V	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25
Vout Max, V	5	5	5	5	5	5	5	5
Vout Max 2, V	5	5	5	5	5	5	5	5
Vout Maximum	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin
Vout Min, V	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Vout Min 2, V	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8

Eco Plan

	LTC3546EFE#PBF	LTC3546EFE#TRPBF	LTC3546EUFD#PBF	LTC3546EUFD#TRPBF	LTC3546IFE#PBF	LTC3546IFE#TRPBF	LTC3546IUFD#PBF	LTC3546IUFD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Dual Output Buck Regulator with Current Partitioning Optimizes Efficiency in Space-Sensitive Applications &mdash DN460
PDF, 79 Kb, File published: Feb 24, 2009
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Dual Output Buck Regulator with Current Partitioning
Optimizes Efficiency in Space-Sensitive Applications
Design Note 460
Johan Strydom
Introduction
The LTC В®3546 is a dual output current mode buck regulator with п¬‚exible output current partitioning. Beyond
the advantages normally associated with dual output
regulators (reduced size, cost, EMI and part count, with
improved efп¬Ѓciency), the LTC3546вЂ™s outputs can be
partitioned for either 3A and 1A outputs, or two 2A outputs. This increases its application range and simpliп¬Ѓes
multiple supply rail designs. A conп¬Ѓgurable Burst ModeВ®
clamp for each output sets the current transition level
between Burst Mode operation and forced continuous
conduction mode to optimize efп¬Ѓciency over the entire
output range. An adjustable switching frequency up to
4MHz and internal power MOSFET switches allow for
small and compact footprints. The adjustable switching frequency can be set from
750kHz to 4MHz by an external resistor or synchronized
to an external clock, allowing for a signiп¬Ѓcant reduction in
overall solution size through the reduction of the output
capacitors and inductors. Furthermore, the 180 degree
phase shift between outputs reduces input ripple current
when compared with two independent regulators, as the …

Model Line

Series: LTC3546 (8)

LTC3546EFE#PBF LTC3546EFE#TRPBF LTC3546EUFD#PBF LTC3546EUFD#TRPBF LTC3546IFE#PBF LTC3546IFE#TRPBF LTC3546IUFD#PBF LTC3546IUFD#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck