Datasheet Linear Technology LTC3802 — Ficha de datos

Fabricante	Linear Technology
Serie	LTC3802

Controlador dual DC / DC síncrono bifásico de 550 kHz con seguimiento programable ascendente / descendente

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PDF, 359 Kb, Idioma: en, Archivo subido: sept 23, 2017, Páginas: 28
Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking

Extracto del documento

Precios

Embalaje

	LTC3802EGN#PBF	LTC3802EGN#TRPBF	LTC3802EUH#PBF	LTC3802EUH#TRPBF
N	1	2	3	4
Package	SSOP-28 Dibujo del esquema del paquete	SSOP-28 Dibujo del esquema del paquete	5x5 QFN-32 Dibujo del esquema del paquete	5x5 QFN-32 Dibujo del esquema del paquete
Package Code	GN	GN	UH	UH
Package Index	05-08-1641 (GN28)	05-08-1641 (GN28)	05-08-1693	05-08-1693
Pin Count	28	28	32	32

Paramétricos

Parameters / Models	LTC3802EGN#PBF	LTC3802EGN#TRPBF	LTC3802EUH#PBF	LTC3802EUH#TRPBF
Architecture	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode
Demo Boards	DC653A	DC653A	DC653A	DC653A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Features	No Rsense, Tracking, PolyPhase, External Synchronization, PLL, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, Soft Start	No Rsense, Tracking, PolyPhase, External Synchronization, PLL, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, Soft Start	No Rsense, Tracking, PolyPhase, External Synchronization, PLL, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, Soft Start	No Rsense, Tracking, PolyPhase, External Synchronization, PLL, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, Soft Start
Frequency, kHz	750	750	750	750
Frequency Adjust Range	330kHz, 550kHz, 750kHz	330kHz, 550kHz, 750kHz	330kHz, 550kHz, 750kHz	330kHz, 550kHz, 750kHz
Frequency Sync Range	330kHz - 750kHz	330kHz - 750kHz	330kHz - 750kHz	330kHz - 750kHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	100	100	100	100
Isupply, mA	6.5	6.5	6.5	6.5
Max Phases	2	2	2	2
Monolithic	no	no	no	no
Number of Outputs	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85
Output Current, A	25	25	25	25
Output Current 2, A	25	25	25	25
Polyphase	yes	yes	yes	yes
Sense Resistor	None	None	None	None
Switch Current, A	25	25	25	25
Switch Current 2, A	25	25	25	25
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck
Vin Max, V	30	30	30	30
Vin Min, V	3	3	3	3
Vout Max, V	27	27	27	27
Vout Maximum	0.9VIN	0.9VIN	0.9VIN	0.9VIN
Vout Min, V	0.6	0.6	0.6	0.6
Vout Min 2, V	.8	.8	.8	.8
Vref Accuracy Over Temp, %	1	1	1	1

Plan ecológico

	LTC3802EGN#PBF	LTC3802EGN#TRPBF	LTC3802EUH#PBF	LTC3802EUH#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente

Artículos

Descargar
30V, Dual Output Regulator Controller is Efficient, Rich in Features, and Saves Space &mdash LT Journal
PDF, 1.0 Mb, Archivo publicado: marzo 25, 2005
Extracto del documento
DESIGN FEATURES 30V, Dual Output Regulator Controller
is Efп¬Ѓcient, Rich in Features,
and Saves Space by Teo Yang Long and Theo Phillips
Introduction
The LTC3802 is designed to excel in
generating low output voltages from
high input voltages, a common problem for the power supplies of fast CPUs.
It is the latest in Linear TechnologyвЂ™s
family of high speed, voltage feedback,
synchronous step-down regulator
controllers. It retains the constant
frequency architecture and Burst
ModeВ® operation of the LTC1702A,
while improving on its performance
and adding features (see Table 1).
The input supply operating range
is extended from a nominal 5V to the
entire 3VвЂ“30V range. The internal
reference voltage has decreased, allowing the output to go as low as
0.6V. An advanced modulation scheme
facilitates these low duty cycles and
fast switching frequencies. The two
channels are still run 180В° out of …

Linea modelo

Serie: LTC3802 (4)

LTC3802EGN#PBF LTC3802EGN#TRPBF LTC3802EUH#PBF LTC3802EUH#TRPBF

Clasificación del fabricante

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