Datasheet Linear Technology LTC3875

Manufacturer	Linear Technology
Series	LTC3875

Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation

Datasheets

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PDF, 997 Kb, Language: en, File uploaded: Sep 24, 2017, Pages: 46
Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation

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Packaging

	LTC3875EUH#PBF	LTC3875EUH#TRPBF	LTC3875EUJ#PBF	LTC3875EUJ#TRPBF	LTC3875IUH#PBF	LTC3875IUH#TRPBF	LTC3875IUJ#PBF	LTC3875IUJ#TRPBF
N	1	2	3	4	5	6	7	8
Package	5x5 QFN-40 Package Outline Drawing	5x5 QFN-40 Package Outline Drawing	6x6 QFN-40 Package Outline Drawing	6x6 QFN-40 Package Outline Drawing	5x5 QFN-40 Package Outline Drawing	5x5 QFN-40 Package Outline Drawing	6x6 QFN-40 Package Outline Drawing	6x6 QFN-40 Package Outline Drawing
Package Code	UH	UH	UJ	UJ	UH	UH	UJ	UJ
Package Index	05-08-1746	05-08-1746	05-08-1728	05-08-1728	05-08-1746	05-08-1746	05-08-1728	05-08-1728
Pin Count	40	40	40	40	40	40	40	40

Parametrics

Parameters / Models	LTC3875EUH#PBF	LTC3875EUH#TRPBF	LTC3875EUJ#PBF	LTC3875EUJ#TRPBF	LTC3875IUH#PBF	LTC3875IUH#TRPBF	LTC3875IUJ#PBF	LTC3875IUJ#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	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A	DC2000A,DC2055A,DC2142A,DC2225A
Design Tools	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File
Export Control	no	no	no	no	no	no	no	no
Features	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good	Resistor Set Frequency, External Synchronization, Differential Remote Sense, Sub-Milliohm DCR Current Sense, Tracking, Power Good
Frequency, kHz	720	720	720	720	720	720	720	720
Frequency Adjust Range	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz
Frequency Sync Range	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz	250kHz - 720kHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	40	40	40	40	40	40	40	40
Isupply, mA	7	7	7	7	7	7	7	7
Max Phases	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12
Monolithic	no	no	no	no	no	no	no	no
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	30	30	30	30	30	30	30	30
Output Current 2, A	30	30	30	30	30	30	30	30
Polyphase	yes	yes	yes	yes	yes	yes	yes	yes
Sense Resistor	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR	Rsense, DCR, Sub-Milliohm DCR
Switch Current, A	30	30	30	30	30	30	30	30
Switch Current 2, A	30	30	30	30	30	30	30	30
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	38	38	38	38	38	38	38	38
Vin Min, V	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5
Vout Max, V	5	5	5	5	5	5	5	5
Vout Maximum	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)	3.5V (low DCR) or 5V (without low DCR)
Vout Min, V	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Vout Min 2, V	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75

Eco Plan

	LTC3875EUH#PBF	LTC3875EUH#TRPBF	LTC3875EUJ#PBF	LTC3875EUJ#TRPBF	LTC3875IUH#PBF	LTC3875IUH#TRPBF	LTC3875IUJ#PBF	LTC3875IUJ#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

Download
4-Phase Power Supply Delivers 120A in Tiny Footprint, Features Ultralow DCR Sensing for High Efficiency &mdash LT Journal
PDF, 313 Kb, File published: Jul 7, 2015
Extract from the document
4-Phase Power Supply Delivers 120A in Tiny Footprint,
Features Ultralow DCR Sensing for High Efficiency
Yingyi Yan, Haoran Wu and Jian Li The LTC3875 is a feature-rich dual-output synchronous
buck controller that meets the power density demands
of modern high speed, high capacity data processing
systems, telecom systems, industrial equipment and DC
power distribution systems. The LTC3875 delivers high
efficiency with reliable current mode control, ultralow DCR
sensing and strong integrated drivers in a 6mm Г— 6mm
40-pin QFN. Multiple LTC3875s can be paralleled to provide
higher current, or it can be combined with the LTC3874
to deliver the same performance with a smaller footprint.
The LTC3874 is a small footprint
(4mm Г— 5mm QFN), dual PolyPhaseВ® current mode synchronous step-down slave
controller (phase extender). It is suitable
for high current, multiphase applications
when paired with a companion master
controller, such as LTC3875. The LTC3874
can use sub-milliohm DC resistance
power inductors to optimize efficiency.
Immediate response to system faults
guarantees reliability of the total solution. 1V V OUT, 120A CONVERTER WITH
PARALLEL LTC3875s The LTC3875 can be easily configured as …
Download
High Efficiency PolyPhase Power Supply Delivers 30A per Phase with Ultralow Inductor DCR Sensing and Fast Transient Response &mdash LT Journal
PDF, 501 Kb, File published: Jan 6, 2014
Extract from the document
High Efficiency PolyPhase Power Supply Delivers
30A per Phase with Ultralow Inductor DCR Sensing
and Fast Transient Response
Jian Li and Gina Le The LTC3875 is a feature-rich dual-output synchronous
buck controller that meets the power density
demands of modern high speed, high capacity data
processing systems, telecom systems, industrial
equipment and DC power distribution systems.
The LTC3875вЂ™s features include: 60k
D1 CB1 0.1ВµF IFAST
PHASMD
CLKOUT
PGOOD
MODE/PLLIN BOOST1
SW1
EXTVCC
BG1
TAVG M2 715О© 220nF
220nF
RB1 13.3k COUT3
470ВµF
Г—2 RUN1,2 COUT4
100ВµF …

Model Line

Series: LTC3875 (8)

LTC3875EUH#PBF LTC3875EUH#TRPBF LTC3875EUJ#PBF LTC3875EUJ#TRPBF LTC3875IUH#PBF LTC3875IUH#TRPBF LTC3875IUJ#PBF LTC3875IUJ#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | High Input Voltage Buck | External Power Switch Buck Controllers