Datasheet Linear Technology LT1373CN8#PBF — 数据表

制造商	Linear Technology
系列	LT1373
零件号	LT1373CN8#PBF

250kHz低电源电流高效1.5A开关稳压器

数据表

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PDF, 199 Kb, 修订版: BS, 文件上传: Sep 3, 2017

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价格

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Package	N-8
Package Code	N
Package Index	05-08-1510 (N8)

参数化

Architecture	Constant Frequency Current Mode
Demo Boards	DC076A,DC161A,DC181A,DC515A
Design Tools	LTspice Model
Export Control	no
Features	External Synchronization
Frequency	250 kHz
Frequency Sync Range	300kHz - 340kHz
Integrated Inductor	no
Ishutdown	12 µA
Isupply	1 mA
Monolithic	yes
Number of Outputs	1
Operating Temperature Range	0 to 70 °C
Polyphase	no
Switch Current	2 A
Synchronous	no
Topology	Boost, Flyback, Sepic, Inverting
Vin Max	30 V
Vin Min	2.7 V
Vin Min Startup	2.7 V
Vout Max	35 V
Vout Min	1.245 V
Vswitch Max	35 V

生态计划

RoHS

Compliant

其他选择

LT1373HV

设计须知

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250kHz, 1mA I Q Constant Frequency Switcher Tames Portable Systems Power &mdash DN108
PDF, 73 Kb, 档案已发布: Jul 2, 1995
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advertisement 250kHz, 1mA IQ Constant Frequency Switcher Tames
Portable Systems Power вЂ“ Design Note 108
Bob Essaff
DC-to-DC power conversion remains one of the toughest tasks for portable system designers. Dealing with
various battery technologies and output voltage requirements dictate the need for creative circuit solutions. The
two circuits discussed are tailored for operation from
a single lithium-ion (Li-Ion) cell. These new batteries
are п¬Ѓnding widespread use due to their high energy
storage capabilities. The п¬Ѓrst circuit has a 3.3V output
and the second circuit has both 5V and вЂ“5V outputs
for applications requiring dual supplies.
At the heart of each circuit is the LTВ®1373 current mode
switching regulator. Guaranteed to operate down to
2.7V, this part allows the full energy storage capacity
of a single Li-Ion battery to be used. The LT1373 draws
only 1mA of quiescent current for high efп¬Ѓciency at
light loads and has a low resistance 1.5A switch for
good efп¬Ѓciency at higher loads. Switching at 250kHz
saves space by reducing the size of the magnetics,
and the п¬Ѓxed-frequency switching also reduces the
noise spectrum generated. To avoid sensitive system
frequencies the part can be externally synchronized
to a speciп¬Ѓc frequency from 300kHz to 360kHz. The …
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Monolithic DC/DC Converters Break Speed Limits to Shrink Board Space &mdash DN125
PDF, 80 Kb, 档案已发布: Mar 2, 1996
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advertisement Monolithic DC/DC Converters Break 1MHz to
Shrink Board Space вЂ“ Design Note 125
Mitchell Lee
In the never-ending quest for board space, operating
frequency remains the most important variable in a
DC/DC converter design. Higher frequency equates
with smaller coils and capacitors. A new family of fast
monolithic converters that allows circuit designers to
reduce the size of their п¬Ѓnished products is now available. Other improvements include quiescent currents
well below those of slower converters and a new switchdrive technique that reduces dynamic losses by at least
four fold over previous methods, virtually eliminating
these losses as a concern in efп¬Ѓciency calculations.
Table 1 shows the salient features of each member of
the family. Each is conп¬Ѓgured as a grounded-switch
step-up converter, but is equally useful in positive
and negative high efп¬Ѓciency buck, SEPIC, inverting
and п¬‚yback circuits. The converters are all based
on the LT В®1372 design, which operates at 500kHz,
draws 4mA quiescent current and contains a 1.5A,
0.5О© switch. The LT1371 is designed for higher
power applications, with a 3A, 0.25О© switch. Supply
current and operating frequency remain unchanged.
Reduced quiescent current (1mA) makes the LT1373 …

模型线

系列: LT1373 (6)

LT1373CN8#PBF LT1373CS8#PBF LT1373CS8#TRPBF LT1373IN8#PBF LT1373IS8#PBF LT1373IS8#TRPBF

制造商分类

Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost

其他名称:

LT1373CN8PBF, LT1373CN8 PBF