Datasheet Linear Technology LTC3856EUH#PBF — Даташит

Производитель	Linear Technology
Серия	LTC3856
Модель	LTC3856EUH#PBF

2-фазный синхронный понижающий контроллер постоянного / постоянного тока с диффузором

Datasheets

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PDF, 840 Кб, Язык: анг., Файл закачен: 23 сен 2017, Страниц: 40
2-Phase Synchronous Step-Down DC/DC Controller with Diffamp

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Цены

Купить LTC3856EUH#PBF на РадиоЛоцман.Цены — от 140 до 1 106 ₽ 31 предложений от 19 поставщиков IC: PMIC; преобразователь DC/DC; Uвх: 4,5÷38ВDC; Uвых: 0,6÷5ВDC
ChipWorker Весь мир	LTC3856EUH#TRPBF Analog Devices	184 ₽
Lixinc Electronics Весь мир	LTC3856EUH#TRPBF Linear Technology	от 368 ₽
Augswan Весь мир	LTC3856EUH#TRPBF Analog Devices	по запросу
Океан Электроники Россия	LTC3856EUH#PBF Linear Technology	по запросу

Корпус / Упаковка / Маркировка

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

Параметры

Архитектура	Constant Frequency Current Mode
Demo Boards	DC1580A
Design Tools	LTspice File,LTpowerCAD File
Экспортный контроль	нет
Основные особенности	PolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power Good
Тактовая частота	770 kHz
Frequency Sync Range	250kHz - 770kHz
Integrated Inductor	нет
Ishutdown	40 мкА
Isupply	4 мА
Max Phases	2, 3, 4, 6, 12
Monolithic	нет
Количество выходов	1
Рабочий диапазон температур	от 0 до 85 °C
Выходной ток	60 A
Polyphase	да
Sense Resistor	Rsense, DCR
Switch Current	60 A
Synchronous	да
Topology	Buck
Vin Max	38 В
Vin Min	4.5 В
Vout Max	5 В
Vout Maximum	5V (without diff amp), 3.3V (with diff amp)
Vout Min	0.6 В
Vref Accuracy Over Temp	0.75 %

Экологический статус

RoHS

Совместим

Design Notes

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2-Phase Synchronous Buck Controller Features Light Load Stage Shedding Mode, Active Voltage Positioning, Low RSENSE and Remote VOUT Sensing &mdash DN486
PDF, 96 Кб, Файл опубликован: 10 ноя 2010
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2-Phase Synchronous Buck Controller Features Light Load Stage
Shedding Mode, Active Voltage Positioning, Low RSENSE and
Remote VOUT Sensing
Design Note 486
Charlie Zhao and Jian Li
Introduction
TodayвЂ™s computer, datacom, and telecom systems demand power supplies that are efп¬Ѓcient, respond quickly
to load transients and accurately regulate the voltage
at the load. For example, load current can be measured
by using the inductor DCR, thus eliminating the need
for a dedicated sense resistor. Inductor DCR sensing
increases efп¬ЃciencyвЂ”especially at heavy loadвЂ”while
reducing component cost and required board space.
The LTC В®3856 single-output 2-phase synchronous buck
controller improves the accuracy of inductor DCR sensing
by compensating for changes in DCR due to temperature. age sensing, Stage Sheddingв„ў mode for improved light
load efп¬Ѓciency and adaptive voltage positioning for fast
transient response. The LTC3856 can convert a wide input
voltage range, 4.5V to 38V, to outputs from 0.6V to 5V.
Despite the many features, the chip is small, available in
32-pin 5mm Г— 5mm QFN and 38-pin TSSOP packages.
High Efп¬Ѓciency, 2-Phase, 4.5V to 14V Input,
1.5V/50A Output Converter …

Статьи

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2-Phase Synchronous Step-Down DC/DC Controller with Programmable Stage Shedding Mode and Active Voltage Positioning for High Efficiency and Fast Transient Response &mdash LT Journal
PDF, 1.3 Мб, Файл опубликован: 30 июн 2010
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design features 2-Phase Synchronous Step-Down DC/DC Controller with
Programmable Stage Shedding Mode and Active Voltage
Positioning for High Efficiency and Fast Transient Response
Jian Li and Charlie Zhao The LTC3856 is a versatile and feature-rich single-output 2-phase synchronous buck
controller with on-chip drivers, remote output voltage sensing, inductor DCR temperature
compensation, Stage Sheddingв„ў mode and active voltage positioning (AVP). It is suitable for
converting inputs of 4.5VвЂ“38V to outputs from 0.6V up to 5V. The LTC3856 facilitates the
design of high efficiency, high power density solutions for telecom and datacom systems,
industrial and medical instruments, DC power distribution systems and computer systems.
The controller is available in 32-pin 5mm Г— 5mm QFN and 38-pin TSSOP packages.
MAJOR FEATURES making it possible to produce a large stepdown ratio applications in very little space. The LTC3856вЂ™s constant-frequency peak
current-mode control architecture allows
a phase-lockable frequency of up to
770kHz. For high frequency applications,
the LTC3856 can operate at low duty cycles
due to its small minimum on-time (90ns), drops during heavy load conditions.
Figure 1 shows a typical 4.5V~14V input,
1.5V/50A output application schematic. The LTC3856 includes a high speed differential amplifier for remote output
voltage sensing, which can eliminate
the regulation error due to PCB voltage The LTC3856вЂ™s two channels operate
anti-phase, which reduces the input
RMS current ripple and thus the input Figure 1. A 1.5V/50A, 2-phase converter featuring the LTC3856
VIN + VIN 1nF 0.1ВµF 2.2О© S 5.6k 100pF 100О© VIN 100О© …

Модельный ряд

Серия: LTC3856 (8)

LTC3856EFE#PBF LTC3856EFE#TRPBF LTC3856EUH#PBF LTC3856EUH#TRPBF LTC3856IFE#PBF LTC3856IFE#TRPBF LTC3856IUH#PBF LTC3856IUH#TRPBF

Классификация производителя

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

Варианты написания:

LTC3856EUHPBF, LTC3856EUH PBF