Datasheet Linear Technology LT3640 — Даташит

Производитель	Linear Technology
Серия	LT3640

Двойной монолитный понижающий регулятор со сбросом при включении и сторожевым таймером

Datasheets

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PDF, 523 Кб, Язык: анг., Файл закачен: 18 сен 2017, Страниц: 24
Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer

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Масштаб. Поставляем промышленную память с гарантией 12 месяцев

Корпус / Упаковка / Маркировка

	LT3640EFE#PBF	LT3640EFE#TRPBF	LT3640EUFD#PBF	LT3640EUFD#TRPBF	LT3640IFE#PBF	LT3640IFE#TRPBF	LT3640IUFD#PBF	LT3640IUFD#TRPBF
N	1	2	3	4	5	6	7	8
Корпус	TSSOP-28 Габаритный чертеж корпуса	TSSOP-28 Габаритный чертеж корпуса	4x5 QFN-28 Габаритный чертеж корпуса	4x5 QFN-28 Габаритный чертеж корпуса	TSSOP-28 Габаритный чертеж корпуса	TSSOP-28 Габаритный чертеж корпуса	4x5 QFN-28 Габаритный чертеж корпуса	4x5 QFN-28 Габаритный чертеж корпуса
Код корпуса	FE	FE	UFD	UFD	FE	FE	UFD	UFD
Индекс корпуса	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712
Количество выводов	28	28	28	28	28	28	28	28

Параметры

Parameters / Models	LT3640EFE#PBF	LT3640EFE#TRPBF	LT3640EUFD#PBF	LT3640EUFD#TRPBF	LT3640IFE#PBF	LT3640IFE#TRPBF	LT3640IUFD#PBF	LT3640IUFD#TRPBF
Архитектура	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1359A	DC1359A	DC1359A	DC1359A	DC1359A	DC1359A	DC1359A	DC1359A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Экспортный контроль	нет	нет	нет	нет	нет	нет	нет	нет
Основные особенности	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good	Power On Reset, Burst Mode, Watchdog Timer, Resistor Set Frequency, External Synchronization, Power Good
Тактовая частота, kHz	2500	2500	2500	2500	2500	2500	2500	2500
Frequency Adjust Range	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz
Frequency Sync Range	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz	350kHz - 2.5MHz
Integrated Inductor	нет	нет	нет	нет	нет	нет	нет	нет
Ishutdown, мкА	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Isupply, мА	0.275	0.275	0.275	0.275	0.275	0.275	0.275	0.275
Max Phases	1	1	1	1	1	1	1	1
Monolithic	да	да	да	да	да	да	да	да
Количество выходов	2	2	2	2	2	2	2	2
Рабочий диапазон температур, °C	от 0 до 85	от 0 до 85	от 0 до 85	от 0 до 85	от -40 до 85	от -40 до 85	от -40 до 85	от -40 до 85
Выходной ток, A	1.3	1.3	1.3	1.3	1.3	1.3	1.3	1.3
Output Current 2, A	1	1	1	1	1	1	1	1
Over Voltage Protection, В	55	55	55	55	55	55	55	55
Polyphase	нет	нет	нет	нет	нет	нет	нет	нет
Switch Current, A	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8
Switch Current 2, A	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1
Synchronous	да	да	да	да	да	да	да	да
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, В	35	35	35	35	35	35	35	35
Vin Min, В	4	4	4	4	4	4	4	4
Vout Max, В	33.97	33.97	33.97	33.97	33.97	33.97	33.97	33.97
Vout Maximum	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin	0.97Vin
Vout Min, В	1.265	1.265	1.265	1.265	1.265	1.265	1.265	1.265
Vout Min 2, В	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	2	2	2	2	2	2	2	2

Экологический статус

	LT3640EFE#PBF	LT3640EFE#TRPBF	LT3640EUFD#PBF	LT3640EUFD#TRPBF	LT3640IFE#PBF	LT3640IFE#TRPBF	LT3640IUFD#PBF	LT3640IUFD#TRPBF
RoHS	Совместим	Совместим	Совместим	Совместим	Совместим	Совместим	Совместим	Совместим

Статьи

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2MHz Dual Buck Regulator Operates Outside of AM Radio Band When Delivering 3.3V and 1.8V from 16V Input &mdash LT Journal
PDF, 723 Кб, Файл опубликован: 1 апр 2010
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2MHz Dual Buck Regulator Operates Outside of AM Radio
Band When Delivering 3.3V and 1.8V from 16V Input
Pit-Leong Wong The number of microprocessor-based control units continues
to grow in both automobiles and industrial systems. Because
the amount of required processing power is also increasing,
even modest processors require a low voltage core supply
in addition to 3.3V or 5V memory, I/O and analog supplies.
In automotive systems, power comes
from the battery, with its voltage typically between 9V and 16V. Including cold
crank and double battery jump-starts, the
minimum input voltage may be as low
as 4V and the maximum up to 36V, with
even higher transient voltages. Likewise,
a 24V industrial supply may be as high
as 32V. With these high input voltages,
linear regulators cannot be used for supply currents greater than 200mA without
overheating the regulator. Instead, high
efficiency switching regulators must be
used to minimize thermal dissipation.
There are challenges in applying switching regulators in these systems. A small
circuit is desired, and certain operating
frequencies may be unacceptable. At
high step-down ratios, switching regulators typically operate at frequencies in …

Модельный ряд

Серия: LT3640 (8)

LT3640EFE#PBF LT3640EFE#TRPBF LT3640EUFD#PBF LT3640EUFD#TRPBF LT3640IFE#PBF LT3640IFE#TRPBF LT3640IUFD#PBF LT3640IUFD#TRPBF

Классификация производителя

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