Datasheet Linear Technology LTC3808 — Ficha de datos

Fabricante	Linear Technology
Serie	LTC3808

Sin RSENSE, bajo EMI, controlador síncrono DC / DC con seguimiento de salida

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PDF, 386 Kb, Idioma: en, Archivo subido: sept 23, 2017, Páginas: 28
No RSENSE , Low EMI, Synchronous DC/DC Controller with Output Tracking

Extracto del documento

Embalaje

	LTC3808EDE#PBF	LTC3808EDE#TRPBF	LTC3808EGN#PBF	LTC3808EGN#TRPBF
N	1	2	3	4
Package	4x3 DFN-14 Dibujo del esquema del paquete	4x3 DFN-14 Dibujo del esquema del paquete	SSOP-16 Dibujo del esquema del paquete	SSOP-16 Dibujo del esquema del paquete
Package Code	DE	DE	GN	GN
Package Index	05-08-1708	05-08-1708	05-08-1641 (GN16)	05-08-1641 (GN16)
Pin Count	14	14	16	16

Paramétricos

Parameters / Models	LTC3808EDE#PBF	LTC3808EDE#TRPBF	LTC3808EGN#PBF	LTC3808EGN#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC769A	DC769A	DC769A	DC769A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Features	No Rsense, Tracking, Spread Spectrum, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, 100% Duty Cycle	No Rsense, Tracking, Spread Spectrum, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, 100% Duty Cycle	No Rsense, Tracking, Spread Spectrum, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, 100% Duty Cycle	No Rsense, Tracking, Spread Spectrum, Burst Mode, External Synchronization, PLL, Selectable Switching Frequency, Power Good, 100% Duty Cycle
Frequency, kHz	750	750	750	750
Frequency Adjust Range	300kHz, 550kHz, 750kHz	300kHz, 550kHz, 750kHz	300kHz, 550kHz, 750kHz	300kHz, 550kHz, 750kHz
Frequency Sync Range	250kHz - 750kHz	250kHz - 750kHz	250kHz - 750kHz	250kHz - 750kHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	9	9	9	9
Isupply, mA	0.35	0.35	0.35	0.35
Max Phases	1	1	1	1
Monolithic	no	no	no	no
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85
Output Current, A	5	5	5	5
Polyphase	no	no	no	no
Sense Resistor	None	None	None	None
Switch Current, A	5	5	5	5
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	9.8	9.8	9.8	9.8
Vin Min, V	2.75	2.75	2.75	2.75
Vout Max, V	9.8	9.8	9.8	9.8
Vout Maximum	Vin	Vin	Vin	Vin
Vout Min, V	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	1.5	1.5	1.5	1.5

Plan ecológico

	LTC3808EDE#PBF	LTC3808EDE#TRPBF	LTC3808EGN#PBF	LTC3808EGN#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente

Notas de Diseño

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Low EMI Synchronous DC/DC Step-Down Controllers Offer Programmable Output Tracking &mdash DN382
PDF, 122 Kb, Archivo publicado: dic 9, 2005
Extracto del documento
advertisement Low EMI Synchronous DC/DC Step-Down Controllers Offer
Programmable Output Tracking вЂ“ Design Note 382
Charlie Zhao
Introduction
The LTCВ® 3808 synchronous DC/DC step-down controller
packs numerous features required by the latest electronic
devices into a low proп¬Ѓle (0.75mm) 3mm Г— 4mm leadless
DFN package or a leaded SSOP-16 package. Two similar
parts, the LTC3809 and LTC3809-1, are even smaller, but
less feature-rich versions of the LTC3808. The LTC3809
family is available in a 3mm Г— 3mm leadless DFN package
or a 10-pin MSOP Exposed Pad package. All three parts
can provide output voltages as low as 0.6V and output
currents as high as 7A from a 2.75V to 9.8V input range,
making them ideal devices for one or two lithium-ion cell
inputs as well as distributed DC power systems.
The LTC3808 and LTC3809 also include important
features for noise-sensitive applications, including a
phase-locked loop (PLL) for frequency synchronization
and spread spectrum frequency modulation to minimize
generated electromagnetic interference (EMI). The
adjustable operating frequency (300kHz to 750kHz) allows
the use of small surface mount inductors and ceramic …

Artículos

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Low EMI, Output Tracking, High Efficiency, and Too Many Other Features to List in a 3mm x 4mm Synchronous Buck Controller &mdash LT Journal
PDF, 356 Kb, Archivo publicado: jun 10, 2005
Extracto del documento
DESIGN FEATURES Low EMI, Output Tracking, High
Efп¬Ѓciency, and Too Many Other
Features to List in a 3mm x 4mm
Synchronous Buck Controller by Lin Sheng
Introduction How It Works The LTC3808 synchronous DC/
DC controller packs many features
required by the latest electronic devices into a low proп¬Ѓle (0.8mm tall),
3mm Г— 4mm leadless DFN package,
or a leaded SSOP-16 package. The
LTC3808 can provide output voltages
as low as 0.6V and output currents as
high as 7A from a wide, 2.75V to 9.8V,
input range, making it an ideal device
for battery powered and distributed
DC power systems. It also includes
important features for noise-sensitive
applications, including a phase-locked
loop (PLL) for frequency synchronization and spread spectrum frequency
modulation to minimize electromagnetic interference (EMI).
The LTC3808 improves battery
life and saves space by delivering
high efп¬Ѓciency with a low operating
quiescent current. The LTC3808 also …

Linea modelo

Serie: LTC3808 (4)

LTC3808EDE#PBF LTC3808EDE#TRPBF LTC3808EGN#PBF LTC3808EGN#TRPBF

Clasificación del fabricante

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