Datasheet Linear Technology LT3489EMS8E#PBF

Manufacturer	Linear Technology
Series	LT3489
Part Number	LT3489EMS8E#PBF

2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start

Datasheets

PDF, 225 Kb, File uploaded: Sep 18, 2017

Extract from the document

Packaging

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

Parametrics

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

Eco Plan

RoHS

Compliant

Design Notes

Download
Drive Large TFT-LCD Displays with a Space-Saving Triple-Output Regulator &mdash DN417
PDF, 130 Kb, File published: Dec 18, 2006
Extract from the document
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 …

Model Line

Series: LT3489 (2)

LT3489EMS8E#PBF LT3489EMS8E#TRPBF

Manufacturer's Classification

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

Other Names:

LT3489EMS8EPBF, LT3489EMS8E PBF

Slices

Microcontrollers