Datasheet Linear Technology LT3489EMS8E#TRPBF — Datenblatt

Hersteller	Linear Technology
Serie	LT3489
Artikelnummer	LT3489EMS8E#TRPBF

2-MHz-Boost-DC / DC-Wandler mit 2,5-A-Schalter und Softstart

Datenblätter

PDF, 225 Kb, Datei hochgeladen: Sep 18, 2017

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Preise

Verpackung

Package	MS-8E
Package Code	MS8E
Package Index	05-08-1662

Parameter

Architecture	Constant Frequency Current Mode
Demo Boards	DC925A
Design Tools	LTspice File
Export Control	no
Frequency	2000 kHz
Integrated Inductor	no
Ishutdown	0.1 µA
Isupply	2 mA
Monolithic	yes
Number of Outputs	1
Operating Temperature Range	0 to 85 °C
Polyphase	no
Switch Current	3.5 A
Synchronous	no
Topology	Boost, Sepic
Topology 1	Boost
Vin Max	16 V
Vin Min	2.4 V
Vin Min Startup	2.4 V
Vout Max	40 V
Vout Min	1.235 V
Vswitch Max	40 V

Öko-Plan

RoHS

Compliant

Konstruktionshinweise

Herunterladen
Drive Large TFT-LCD Displays with a Space-Saving Triple-Output Regulator &mdash DN417
PDF, 130 Kb, Datei veröffentlicht: Dec 18, 2006
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Drive Large TFT-LCD Displays with a Space-Saving Triple-Output
Regulator вЂ“ Design Note 417
Jesus Rosales Introduction
The power appetite of large TFT-LCDs appears to be
insatiable. Power supplies must feed increasing numbers
of transistors and improved display resolutions, and do
so without taking much space.
The triple output supply shown in Figure 1 shows a compact design based on the LT3489, which is optimized for
driving large TFT panel displays. The main output provides
8V at 600mA while the 23V and вЂ“8V outputs provide 10mA
and 20mA respectively, all from a 3.3V input. Even though
TFT converters generally run from a regulated 3.3V or
5V source, this converter can operate seamlessly from
a Lithium-Ion battery, delivering 5W when the battery is
drained to 3.3V and 8W when it is at 4.2V.
The LT3489 squeezes a 2.5A, 0.12О©, 40V switch into a
tiny 3mm Г— 3mm MS8E footprint. It offers external or
internal compensation, an internal soft-start, a 2MHz switching frequency, and it is also pin compatible with
the popular LT1946. The design process with the LT3489
is easy and predictable.
The circuit in Figure 2 operates as a SEPIC converter,
allowing the output to be higher or lower than the input.
Pulling the вЋЇSвЋЇHвЋЇDвЋЇN pin to ground sets the output at 0V even …

Modellreihe

Serie: LT3489 (2)

LT3489EMS8E#PBF LT3489EMS8E#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > LCD/CCD/OLED Bias | SEPIC Regulators
Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost

Andere Namen:

LT3489EMS8ETRPBF, LT3489EMS8E TRPBF

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