Datasheet Linear Technology LTC3851AIUD-1#PBF — Datenblatt

Hersteller	Linear Technology
Serie	LTC3851A-1
Artikelnummer	LTC3851AIUD-1#PBF

Regler für synchronen Abwärtsschaltregler

Datenblätter

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PDF, 442 Kb, Sprache: en, Datei hochgeladen: Sep 23, 2017, Seiten: 30
Synchronous Step-Down Switching Regulator Controller

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Preise

Verpackung

Package	3x3 QFN-16
Package Code	UD
Package Index	05-08-1691

Parameter

Architecture	Constant Frequency Current Mode
Demo Boards	DC1432A-B
Design Tools	LTspice Model,LTpowerCAD File
Export Control	no
Features	DCR Current Sense, Power Good, External Synchronization, Tracking, Burst Mode
Frequency	750 kHz
Frequency Sync Range	250kHz - 750kHz
Integrated Inductor	no
Ishutdown	25 µA
Isupply	1 mA
Max Phases	1
Monolithic	no
Number of Outputs	1
Operating Temperature Range	-40 to 85 °C
Output Current	25 A
Polyphase	no
Sense Resistor	Rsense, DCR
Switch Current	25 A
Synchronous	yes
Topology	Buck
Vin Max	38 V
Vin Min	4 V
Vout Max	5.5 V
Vout Maximum	0.8
Vout Min	0.8 V
Vref Accuracy Over Temp	1 %

Öko-Plan

RoHS

Compliant

Anwendungshinweise

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Modeling and Loop Compensation Design of Switching Mode Power Supplies &mdash AN149
PDF, 1.4 Mb, Datei veröffentlicht: Mar 23, 2015
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Application Note 149
January 2015
Modeling and Loop Compensation Design of
Switching Mode Power Supplies
Henry J. Zhang
Introduction Identifying The Problem TodayвЂ™s electronic systems are becoming more and more
complex, with an increasing number of power rails and
supplies. To achieve optimum power solution density,
reliability and cost, often system designers need to design
their own power solutions, instead of just using commercial power supply bricks. Designing and optimizing high
performance switching mode power supplies is becoming
a more frequent and challenging task. A well-designed switching mode power supply (SMPS)
must be quiet, both electrically and acoustically. An undercompensated system may result in unstable operations.
Typical symptoms of an unstable power supply include:
audible noise from the magnetic components or ceramic
capacitors, jittering in the switching waveforms, oscillation
of output voltage, overheating of power FETs and so on. Power supply loop compensation design is usually
viewed as a difficult task, especially for inexperienced
supply designers. Practical compensation design typically
involves numerous iterations on the value adjustment
of the compensation components. This is not only time
consuming, but is also inaccurate in a complicated
system whose supply bandwidth and stability margin …

Modellreihe

Serie: LTC3851A-1 (12)

LTC3851AEMSE-1#PBF LTC3851AEMSE-1#TRPBF LTC3851AEUD-1#PBF LTC3851AEUD-1#TRPBF LTC3851AHMSE-1#PBF LTC3851AHMSE-1#TRPBF LTC3851AIMSE-1#PBF LTC3851AIMSE-1#TRPBF LTC3851AIUD-1#PBF LTC3851AIUD-1#TRPBF LTC3851AMPMSE-1#PBF LTC3851AMPMSE-1#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators

Andere Namen:

LTC3851AIUD-1PBF, LTC3851AIUD-1 PBF, LTC3851AIUD1#PBF, LTC3851AIUD 1#PBF