Datasheet Linear Technology LTC3866

Manufacturer	Linear Technology
Series	LTC3866

Current Mode Synchronous Controller for Sub Milliohm DCR Sensing

Datasheets

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PDF, 538 Kb, Language: en, File uploaded: Mar 27, 2018, Pages: 36
Current Mode Synchronous Controller for Sub Milliohm DCR Sensing

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Packaging

	LTC3866EFE#PBF	LTC3866EFE#TRPBF	LTC3866EUF#PBF	LTC3866EUF#TRPBF	LTC3866IFE#PBF	LTC3866IFE#TRPBF	LTC3866IUF#PBF	LTC3866IUF#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-24 Package Outline Drawing	TSSOP-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	TSSOP-24 Package Outline Drawing	TSSOP-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing
Package Code	FE	FE	UF	UF	FE	FE	UF	UF
Package Index	05-08-1771	05-08-1771	05-08-1697	05-08-1697	05-08-1771	05-08-1771	05-08-1697	05-08-1697
Pin Count	24	24	24	24	24	24	24	24

Parametrics

Parameters / Models	LTC3866EFE#PBF	LTC3866EFE#TRPBF	LTC3866EUF#PBF	LTC3866EUF#TRPBF	LTC3866IFE#PBF	LTC3866IFE#TRPBF	LTC3866IUF#PBF	LTC3866IUF#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	DC1829A	DC1829A	DC1829A	DC1829A	DC1829A	DC1829A	DC1829A	DC1829A
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	770	770	770	770	770	770	770	770
Frequency Adjust Range	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz
Frequency Sync Range	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz	250kHz - 770kHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	30	30	30	30	30	30	30	30
Isupply, mA	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2
Max Phases	1	1	1	1	1	1	1	1
Monolithic	no	no	no	no	no	no	no	no
Number of Outputs	1	1	1	1	1	1	1	1
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
Polyphase	no	no	no	no	no	no	no	no
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
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	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	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Vout Maximum	3.5V	3.5V	3.5V	3.5V	3.5V	3.5V	3.5V	3.5V
Vout Min, 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

	LTC3866EFE#PBF	LTC3866EFE#TRPBF	LTC3866EUF#PBF	LTC3866EUF#TRPBF	LTC3866IFE#PBF	LTC3866IFE#TRPBF	LTC3866IUF#PBF	LTC3866IUF#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

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Current Mode Switching Supply with Ultralow Inductor DCR Sensing for High Efficiency and High Reliability &mdash LT Journal
PDF, 3.1 Mb, File published: Apr 24, 2012
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Current Mode Switching Supply with Ultralow Inductor DCR
Sensing for High Efficiency and High Reliability
Jian Li, Haoran Wu and Gina Le Current mode switching supplies have several advantages over voltage-mode switching
supplies: (1) high reliability with fast, cycle-by-cycle current sensing and protection;
(2) simple and reliable loop compensationвЂ”stable with all ceramic output capacitors;
(3) easy and accurate current sharing in high current PolyPhase supplies. In high
current applications, power losses in the current sensing component are a concern,
so the resistance of the sense component must be as low as possible. The problem
is that low resistance sensing elements produce reduced signal-to-noise ratios, such
that switching jitter becomes an issue in high current, high density applications.
The LTC3866 solves this problem by making it possible to build reliable current
mode switching supplies with …

Model Line

Series: LTC3866 (8)

LTC3866EFE#PBF LTC3866EFE#TRPBF LTC3866EUF#PBF LTC3866EUF#TRPBF LTC3866IFE#PBF LTC3866IFE#TRPBF LTC3866IUF#PBF LTC3866IUF#TRPBF

Manufacturer's Classification

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