Datasheet Linear Technology LTC3785IUF#PBF — 数据表

制造商	Linear Technology
系列	LTC3785
零件号	LTC3785IUF#PBF

10V，高效，同步，无RSENSE降压-升压控制器

数据表

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PDF, 287 Kb, 语言: en, 文件上传: Sep 23, 2017, 页数: 20
10V, High Efficiency, Synchronous, No RSENSE Buck-Boost Controller

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价格

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Package	4x4 QFN-24
Package Code	UF
Package Index	05-08-1697

参数化

Architecture	Constant Frequency Current Mode
Demo Boards	DC957A
Design Tools	LTspice File,LTpowerCAD Model
Export Control	no
Features	Burst Mode, No Rsense, Output Disconnect, Resistor Set Frequency
Frequency	1000 kHz
Frequency Adjust Range	100kHz - 1MHz
Integrated Inductor	no
Ishutdown	15 µA
Isupply	0.086 mA
Monolithic	no
Number of Outputs	1
Operating Temperature Range	-40 to 85 °C
Output Current	10 A
Polyphase	no
Sense Resistor	None
Synchronous	yes
Topology	Buck-Boost
Vin Max	10 V
Vin Min	2.7 V
Vout Max	10 V
Vout Min	2.7 V

生态计划

RoHS

Compliant

设计须知

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Buck-Boost Controller Simplifies Design of DC/DC Converters for Handheld Products &mdash DN424
PDF, 96 Kb, 档案已发布: Sep 14, 2007
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advertisement Buck-Boost Controller Simplifies Design of DC/DC Converters for
Handheld Products вЂ“ Design Note 424
David Burgoon
range. The high level of integration yields a simple, low
parts-count solution. The LTC3785 provides for currentlimit and shutdown in all modes of operation (which is
not normally available with boost converters). Introduction
A number of conventional solutions have been available for
the design of a DC/DC converter where the output voltage
is within the input voltage rangeвЂ”a common scenario
in Li-Ion battery-powered applicationsвЂ”but none were
very attractive until now. Conventional topologies, such
as SEPIC or boost followed by buck, have numerous
disadvantages, including low efп¬Ѓciency, complex magnetics, polarity inversion and/or circuit complexity/cost. The
LTCВ®3785 buck-boost controller yields a simple, efп¬Ѓcient,
low parts-count, single-converter solution that is easy
to implement, thus avoiding the drawbacks associated
with traditional solutions. Very high efп¬Ѓciency is achieved by synchronous rectiп¬Ѓcation, high side drive (allowing the use of N-channel
MOSFETs), RDS(ON) current sensing, and Burst Mode В®
operation for efп¬Ѓcient light load operation. Protection
features include soft-start, overvoltage, undervoltage
and foldback current-limit with burp-mode or latch-off
for extended faults.
3.3V, 3A Converter Operates from 2.7V вЂ“ 10V Source …

文章

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Single-IC Converter Operates Buck and Boost to Provide an Output that is Within the Input Voltage Range &mdash LT Journal
PDF, 384 Kb, 档案已发布: Oct 16, 2007
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LвЂ‰DESIGN IDEAS Single-IC Converter Operates
Buck and Boost to Provide an Output
that is Within the Input Voltage Range
by David Burgoon Introduction
Generating an output voltage that
is always above or below the input
voltage range can easily be handled
by conventional boost or buck regulators, respectively. However, when the
output voltage is within the input voltage range, as in many Li-Ion battery
powered applications requiring a 3V
or 3.3V output, conventional designs
fall short, suffering variously from low
efficiency, complex magnetics, polarity inversion and circuit complexity.
The LTC3785 buck-boost controller
facilitates a simple, efficient, low partscount, single-converter solution that is
easy to implement and does not have
any of the drawbacks associated with
conventional circuits. tion (OVP) and a 2.7VвЂ“10V output
range.
The circuit produces seamless operation throughout the input voltage
range, operating as a synchronous
buck converter, synchronous boost
2.2nF VOUT …

模型线

系列: LTC3785 (4)

LTC3785EUF#PBF LTC3785EUF#TRPBF LTC3785IUF#PBF LTC3785IUF#TRPBF

制造商分类

Power Management > Switching Regulator > Buck-Boost Regulators > External Power Switch Buck-Boost

其他名称:

LTC3785IUFPBF, LTC3785IUF PBF