Datasheet Linear Technology LTC3775 — Ficha de datos

Fabricante	Linear Technology
Serie	LTC3775

Controlador DC / DC de modo de bajada sincrónica de alta frecuencia

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PDF, 553 Kb, Idioma: en, Archivo subido: sept 23, 2017, Páginas: 34
High Frequency Synchronous Step-Down Voltage Mode DC/DC Controller

Extracto del documento

Embalaje

	LTC3775EMSE#PBF	LTC3775EMSE#TRPBF	LTC3775EUD#PBF	LTC3775EUD#TRPBF	LTC3775IMSE#PBF	LTC3775IMSE#TRPBF	LTC3775IUD#PBF	LTC3775IUD#TRPBF
N	1	2	3	4	5	6	7	8
Package	MS-16E Dibujo del esquema del paquete	MS-16E Dibujo del esquema del paquete	3x3 QFN-16 Dibujo del esquema del paquete	3x3 QFN-16 Dibujo del esquema del paquete	MS-16E Dibujo del esquema del paquete	MS-16E Dibujo del esquema del paquete	3x3 QFN-16 Dibujo del esquema del paquete	3x3 QFN-16 Dibujo del esquema del paquete
Package Code	MSE	MSE	UD	UD	MSE	MSE	UD	UD
Package Index	05-08-1667	05-08-1667	05-08-1691	05-08-1691	05-08-1667	05-08-1667	05-08-1691	05-08-1691
Pin Count	16	16	16	16	16	16	16	16

Paramétricos

Parameters / Models	LTC3775EMSE#PBF	LTC3775EMSE#TRPBF	LTC3775EUD#PBF	LTC3775EUD#TRPBF	LTC3775IMSE#PBF	LTC3775IMSE#TRPBF	LTC3775IUD#PBF	LTC3775IUD#TRPBF
Architecture	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode
Demo Boards	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B	DC1290A-A,DC1290A-B
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	External Synchronization	External Synchronization	External Synchronization	External Synchronization	External Synchronization	External Synchronization	External Synchronization	External Synchronization
Frequency, kHz	1000	1000	1000	1000	1000	1000	1000	1000
Frequency Sync Range	250kHz - 1MHz	250kHz - 1MHz	250kHz - 1MHz	250kHz - 1MHz	250kHz - 1MHz	250kHz - 1MHz	250kHz - 1MHz	250kHz - 1MHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	14	14	14	14	14	14	14	14
Isupply, mA	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
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	25	25	25	25	25	25	25	25
Polyphase	no	no	no	no	no	no	no	no
Sense Resistor	Rsense, None	Rsense, None	Rsense, None	Rsense, None	Rsense, None	Rsense, None	Rsense, None	Rsense, None
Switch Current, A	25	25	25	25	25	25	25	25
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	30.4	30.4	30.4	30.4	30.4	30.4	30.4	30.4
Vout Maximum	.8Vin	.8Vin	.8Vin	.8Vin	.8Vin	.8Vin	.8Vin	.8Vin
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

Plan ecológico

	LTC3775EMSE#PBF	LTC3775EMSE#TRPBF	LTC3775EUD#PBF	LTC3775EUD#TRPBF	LTC3775IMSE#PBF	LTC3775IMSE#TRPBF	LTC3775IUD#PBF	LTC3775IUD#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente

Notas de aplicación

Descargar
Basic Concepts of Linear Regulator and Switching Mode Power Supplies &mdash AN140
PDF, 715 Kb, Archivo publicado: oct 1, 2013
Extracto del documento
Application Note 140
October 2013
Basic Concepts of Linear Regulator and Switching
Mode Power Supplies
Henry J. Zhang
ABSTRACT
This article explains the basic concepts of linear regulators
and switching mode power supplies (SMPS). It is aimed
at system engineers who may not be very familiar with
power supply designs and selection. The basic operating
principles of linear regulators and SMPS are explained
and the advantages and disadvantages of each solution
are discussed. The buck step-down converter is used as
an example to further explain the design considerations
of a switching regulator.
INTRODUCTION
TodayвЂ™s designs require an increasing number of power
rails and supply solutions in electronics systems, with
loads ranging from a few mA for standby supplies to over
100A for ASIC voltage regulators. It is important to choose
the appropriate solution for the targeted application and
to meet specified performance requirements, such as
high efficiency, tight printed circuit board (PCB) space, …

Artículos

Descargar
Produce High DC/DC Step-Down Ratios in Tight Spaces with 30ns Minimum On-Time Controller in 3mm × 3mm QFN &mdash LT Journal
PDF, 450 Kb, Archivo publicado: dic 1, 2009
Extracto del documento
LвЂ‰DESIGN FEATURES Produce High DC/DC Step-Down
Ratios in Tight Spaces with 30ns
Minimum On-Time Controller in
3mm Г— 3mm QFN
by Theo Phillips
Introduction
It can be a challenge to design a DC/
DC converter that takes a high voltage
automotive or industrial power supply
down to the 1.5V or lower voltages
required by todayвЂ™s microprocessors
and programmable logic chips.
To maintain efficiency and performance, designers are often forced to
create a 2-stage solution, which first
steps down to an intermediate voltage
and uses another converter to produce
the low voltage from there. 2-stage
solutions can perform well, and are
handy if the application can use the
intermediate voltage elsewhere, but
2-stage solutions always take more
space and are more costly than a single
stage solution. …

Linea modelo

Serie: LTC3775 (8)

LTC3775EMSE#PBF LTC3775EMSE#TRPBF LTC3775EUD#PBF LTC3775EUD#TRPBF LTC3775IMSE#PBF LTC3775IMSE#TRPBF LTC3775IUD#PBF LTC3775IUD#TRPBF

Clasificación del fabricante

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