Datasheet Linear Technology LTC3861EUH-1#PBF — Даташит

Производитель	Linear Technology
Серия	LTC3861-1
Модель	LTC3861EUH-1#PBF

Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing

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PDF, 1.3 Мб, Язык: анг., Файл закачен: 24 сен 2017, Страниц: 38
Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing

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Популярные АЦП с низкой разрешающей способностью

Корпус / Упаковка / Маркировка

Корпус	5x5 QFN-32
Код корпуса	UH
Индекс корпуса	05-08-1693

Параметры

Архитектура	Constant Frequency Voltage Mode
Design Tools	LTspice Model,LTpowerCAD Model
Экспортный контроль	нет
Основные особенности	PolyPhase, External Synchronization, Resistor Set Frequency, DCR Current Sense, Power Good, Tracking, Soft Start
Тактовая частота	2250 kHz
Frequency Adjust Range	Up to 2.25MHz
Frequency Sync Range	Up to 2.25MHz
Integrated Inductor	нет
Ishutdown	50 мкА
Isupply	30 мА
Max Phases	2, 3, 4, 6, 12
Monolithic	нет
Количество выходов	2
Рабочий диапазон температур	от 0 до 85 °C
Выходной ток	40 A
Output Current 2	40 A
Polyphase	да
Sense Resistor	Rsense, DCR
Switch Current	40 A
Switch Current 2	40 A
Synchronous	да
Topology	Buck
Topology 1	Buck
Topology 2	Buck
Vin Max	24 В
Vin Min	3 В
Vout Max	5.5 В
Vout Maximum	5.5V
Vout Min	0.6 В
Vref Accuracy Over Temp	0.75 %

Экологический статус

RoHS

Совместим

Application Notes

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Modeling and Loop Compensation Design of Switching Mode Power Supplies &mdash AN149
PDF, 1.4 Мб, Файл опубликован: 23 мар 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 …

Модельный ряд

Серия: LTC3861-1 (4)

LTC3861EUH-1#PBF LTC3861EUH-1#TRPBF LTC3861IUH-1#PBF LTC3861IUH-1#TRPBF

Классификация производителя

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

Варианты написания:

LTC3861EUH-1PBF, LTC3861EUH-1 PBF, LTC3861EUH1#PBF, LTC3861EUH 1#PBF