Datasheet Linear Technology LTC3811EUHF#PBF — Datenblatt

Hersteller	Linear Technology
Serie	LTC3811
Artikelnummer	LTC3811EUHF#PBF

Hochgeschwindigkeits-Doppel-, Mehrphasen-DC / DC-Abwärtsregler

Datenblätter

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PDF, 552 Kb, Sprache: en, Datei hochgeladen: Sep 23, 2017, Seiten: 48
High Speed Dual, Multiphase Step-Down DC/DC Controller

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Preise

Verpackung

Package	5x7 QFN-38
Package Code	UHF
Package Index	05-08-1701

Parameter

Architecture	Constant Frequency Current Mode
Demo Boards	DC971A
Design Tools	LTspice Model
Export Control	no
Features	PolyPhase, Differential Remote Sense, DCR Current Sense, Power Good, Tracking, Sequencing, Selectable Switching Frequency, External Synchronization, PLL
Frequency	500 kHz
Frequency Adjust Range	250kHz to 750kHz
Frequency Sync Range	150kHz to 900kHz
Integrated Inductor	no
Ishutdown	20 µA
Isupply	10.5 mA
Max Phases	2, 3, 4, 6, 12
Monolithic	no
Number of Outputs	2
Operating Temperature Range	0 to 85 °C
Output Current	20 A
Output Current 2	20 A
Polyphase	yes
Sense Resistor	Rsense, DCR
Switch Current	20 A
Switch Current 2	20 A
Synchronous	yes
Topology	Buck
Topology 1	Buck
Topology 2	Buck
Vin Max	30 V
Vin Min	4.5 V
Vout Max	3.3 V
Vout Maximum	3.3V
Vout Min	0.6 V
Vout Min 2	0.8 V
Vref Accuracy Over Temp	0.5 %

Öko-Plan

RoHS

Compliant

Konstruktionshinweise

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Multiphase DC/DC Controller Pushes Accuracy and Bandwidth Limits &mdash DN434
PDF, 106 Kb, Datei veröffentlicht: Jan 15, 2008
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advertisement Multiphase DC/DC Controller Pushes Accuracy and Bandwidth
Limits
Design Note 434
Tick Houk
In addition to high accuracy, the LTC3811вЂ™s low minimum on-time (typically 65ns) allows users to convert a
12V input to a 1V output at switching frequencies up to
750kHz, optimizing load transient response and reducing
the solution size. Introduction
Speed and accuracy donвЂ™t always go hand-in-hand
in DC/DC converter systemsвЂ”that is, until now. The
LTC3811 is a dual output, п¬Ѓxed frequency current mode
DC/DC switching regulator controller designed for one of
todayвЂ™s most demanding power supply applications: high
current, low voltage processor core supplies. A Dual Output, 2-Phase Supply with Differential
Remote Sensing and Inductor DCR Sensing
Figure 1 illustrates a dual output supply using the LTC3811.
The 1.5V, 15A output is regulated using the integrated
differential remote sense ampliп¬Ѓer and tracks the output of
channel 1 during start-up. Both outputs use DCR sensing
in order to maximize efп¬Ѓciency and operate 180В° out of With supply current requirements in excess of 100A
and supply voltages as low as 1V, every milliohm of
PCB resistance and every millivolt of IR drop count. The
LTC3811 has an output voltage tolerance of В±0.5% over …

Modellreihe

Serie: LTC3811 (4)

LTC3811EG#PBF LTC3811EG#TRPBF LTC3811EUHF#PBF LTC3811EUHF#TRPBF

Herstellerklassifikation

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

Andere Namen:

LTC3811EUHFPBF, LTC3811EUHF PBF

Verwandte Veröffentlichungen

Datenblätter Datasheet Analog Devices LTC3811

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