Datasheet Linear Technology LTC1704 — Ficha de datos

Fabricante	Linear Technology
Serie	LTC1704

Controlador regulador de conmutación síncrona de 550 kHz más controlador regulador lineal

Hojas de datos

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PDF, 356 Kb, Idioma: en, Archivo subido: sept 20, 2017, Páginas: 28
550kHz Synchronous Switching Regulator Controller Plus Linear Regulator Controller

Extracto del documento

Embalaje

	LTC1704BEGN#PBF	LTC1704BEGN#TRPBF	LTC1704EGN#PBF	LTC1704EGN#TRPBF
N	1	2	3	4
Package	SSOP-16 Dibujo del esquema del paquete	SSOP-16 Dibujo del esquema del paquete	SSOP-16 Dibujo del esquema del paquete	SSOP-16 Dibujo del esquema del paquete
Package Code	GN	GN	GN	GN
Package Index	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)
Pin Count	16	16	16	16

Paramétricos

Parameters / Models	LTC1704BEGN#PBF	LTC1704BEGN#TRPBF	LTC1704EGN#PBF	LTC1704EGN#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC357A-A,DC357A-B	DC357A-A,DC357A-B	DC357A-A,DC357A-B	DC357A-A,DC357A-B
Export Control	no	no	no	no
Features	LDO	LDO	LDO	LDO
Frequency, kHz	550	550	550	550
Integrated Inductor	no	no	no	no
Ishutdown, µA	75	75	75	75
Isupply, mA	4.5	4.5	4.5	4.5
Max Phases	1	1	1	1
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	20	20	20	20
Output Current 2, A	2	2	2	2
Polyphase	no	no	no	no
Sense Resistor	Rsense	Rsense	Rsense	Rsense
Switch Current, A	20	20	20	20
Synchronous	yes	yes	yes	yes
Topology	Buck, LDO	Buck, LDO	Buck, LDO	Buck, LDO
Topology 1	Buck	Buck	Buck	Buck
Topology 2	LDO	LDO	LDO	LDO
Vin Max, V	5.5	5.5	5.5	5.5
Vin Min, V	3.15	3.15	3.15	3.15
Vout Max, V	6	6	6	6
Vout Maximum	6V	6V	6V	6V
Vout Min, V	0.8	0.8	0.8	0.8
Vout Min 2, V	0.8	0.8	0.8	0.8
Vref Accuracy Over Temp, %	1.5	1.5	1.5	1.5

Plan ecológico

	LTC1704BEGN#PBF	LTC1704BEGN#TRPBF	LTC1704EGN#PBF	LTC1704EGN#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente

Notas de Diseño

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Dual Output Supply Powers FPGAs from 3.3V and 5V Inputs &mdash DN311
PDF, 79 Kb, Archivo publicado: mayo 2, 2003
Extracto del documento
advertisement Dual Output Supply Powers FPGAs from 3.3V and 5V Inputs
Design Note 311
Haresh Patel
Introduction
FPGAs often require multiple power supplies: one for
the core voltage (usually 1.8V, but sometimes as low as
1.2V) and at least one more for the I/O circuitry (often
2.5V). The available input supply is either 3.3V or 5V.
One way to provide the multiple step-down conversions
is via multiple switcher-based power supplies; however,
this may be more complicated and cumbersome than
is warranted, especially if the I/O does not draw much
current. In such instances, the dual output LTC В®1704
is a simple and space-saving option. It can supply two
voltages with its versatile high frequency switcher and
its space-saving LDO controller.
Circuit Description
With a 5V input, the switcher channel can generate core
voltages from 0.8V to 3.3V at currents up to 15A. This
550kHz switcher reduces required LC п¬Ѓlter size while
VIN
5V + C6 1ОјF 1
R2 …

Linea modelo

Serie: LTC1704 (4)

LTC1704BEGN#PBF LTC1704BEGN#TRPBF LTC1704EGN#PBF LTC1704EGN#TRPBF

Clasificación del fabricante

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