Datasheet Linear Technology LT8705A — Ficha de datos

Fabricante	Linear Technology
Serie	LT8705A

80V VIN y VOUT Sincrónico 4-Switch Buck- Boost DC / DC Controller

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PDF, 657 Kb, Idioma: en, Archivo subido: sept 20, 2017, Páginas: 44
80V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller

Extracto del documento

Embalaje

	LT8705AEFE#PBF	LT8705AEFE#TRPBF	LT8705AEUHF#PBF	LT8705AEUHF#TRPBF	LT8705AHFE#PBF	LT8705AHFE#TRPBF	LT8705AIFE#PBF	LT8705AIFE#TRPBF	LT8705AIUHF#PBF	LT8705AIUHF#TRPBF	LT8705AMPFE#PBF	LT8705AMPFE#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12
Package	TSSOP-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete	5x7 QFN-38 Dibujo del esquema del paquete	5x7 QFN-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete	5x7 QFN-38 Dibujo del esquema del paquete	5x7 QFN-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete	TSSOP-38 Dibujo del esquema del paquete
Package Code	FE	FE	UHF	UHF	FE	FE	FE	FE	UHF	UHF	FE	FE
Package Index	05-08-1865	05-08-1865	05-08-1701	05-08-1701	05-08-1865	05-08-1865	05-08-1865	05-08-1865	05-08-1701	05-08-1701	05-08-1865	05-08-1865
Pin Count	38	38	38	38	38	38	38	38	38	38	38	38

Paramétricos

Parameters / Models	LT8705AEFE#PBF	LT8705AEFE#TRPBF	LT8705AEUHF#PBF	LT8705AEUHF#TRPBF	LT8705AHFE#PBF	LT8705AHFE#TRPBF	LT8705AIFE#PBF	LT8705AIFE#TRPBF	LT8705AIUHF#PBF	LT8705AIUHF#TRPBF	LT8705AMPFE#PBF	LT8705AMPFE#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	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A	DC2285A
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase	Burst Mode, Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, PolyPhase
Frequency, kHz	400	400	400	400	400	400	400	400	400	400	400	400
Frequency Adjust Range	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz
Frequency Sync Range	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz	100kHz - 400kHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	1	1	1	1	1	1	1	1	1	1	1	1
Isupply, mA	2.65	2.65	2.65	2.65	2.65	2.65	2.65	2.65	2.65	2.65	2.65	2.65
Monolithic	no	no	no	no	no	no	no	no	no	no	no	no
Number of Outputs	1	1	1	1	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 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-55 to 125	-55 to 125
Output Current, A	10	10	10	10	10	10	10	10	10	10	10	10
Sense Resistor	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck
Vin Max, V	80	80	80	80	80	80	80	80	80	80	80	80
Vin Min, V	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8
Vout Max, V	80	80	80	80	80	80	80	80	80	80	80	80
Vout Maximum	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V
Vout Min, V	1.3	1.3	1.3	1.3	1.3	1.3	1.3	1.3	1.3	1.3	1.3	1.3

Plan ecológico

	LT8705AEFE#PBF	LT8705AEFE#TRPBF	LT8705AEUHF#PBF	LT8705AEUHF#TRPBF	LT8705AHFE#PBF	LT8705AHFE#TRPBF	LT8705AIFE#PBF	LT8705AIFE#TRPBF	LT8705AIUHF#PBF	LT8705AIUHF#TRPBF	LT8705AMPFE#PBF	LT8705AMPFE#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente

Notas de Diseño

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80V Synchronous 4-Switch Buck-Boost Controller Delivers Hundreds of Watts with 99% Efficiency &mdash DN521
PDF, 190 Kb, Archivo publicado: sept 30, 2013
Extracto del documento
80V Synchronous 4-Switch Buck-Boost Controller Delivers
Hundreds of Watts with 99% Efficiency вЂ“ Design Note 521
Keith Szolusha and Tage Bjorklund Introduction
A DC/DC converterвЂ™s efficiency and component temperature are important considerations in high power applications where high current could overheat the catch
diode used in an asynchronous buck or boost topology.
Replacing the catch diode with a synchronous switch
can significantly improve overall converter efficiency
and eliminate much of the heat that would be otherwise
generated in the nonsynchronous catch diode.
The advantages offered by a synchronous buck or
boost topology can also be applied to a buck-boost
topology, where the converterвЂ™s output voltage falls
within its input range. In this case, a synchronous
4-switch buck-boost converter using a single inductor
offers the same advantages as a 2-switch synchronous
buck or boost.
L1
22ВµH M1 + CIN2
4.7ВµF
Г—4 CIN1
220ВµF
Г—2 M2 M4 TO
DIODE DB2 TG1 BOOST1 SW1 BG1 CSP 1nF 10О© 1nF 10О© …

Linea modelo

Serie: LT8705A (12)

LT8705AEFE#PBF LT8705AEFE#TRPBF LT8705AEUHF#PBF LT8705AEUHF#TRPBF LT8705AHFE#PBF LT8705AHFE#TRPBF LT8705AIFE#PBF LT8705AIFE#TRPBF LT8705AIUHF#PBF LT8705AIUHF#TRPBF LT8705AMPFE#PBF LT8705AMPFE#TRPBF

Clasificación del fabricante

Power Management > Switching Regulator > Buck-Boost Regulators > External Power Switch Buck-Boost
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators