Datasheet Linear Technology LT3479

Manufacturer	Linear Technology
Series	LT3479

3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection

Datasheets

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PDF, 256 Kb, Language: en, File uploaded: Sep 18, 2017, Pages: 20
3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection

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Packaging

	LT3479EDE#PBF	LT3479EDE#TRPBF	LT3479EFE#PBF	LT3479EFE#TRPBF
N	1	2	3	4
Package	4x3 DFN-14 Package Outline Drawing	4x3 DFN-14 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing
Package Code	DE	DE	FE	FE
Package Index	05-08-1708	05-08-1708	05-08-1663 (BC)	05-08-1663 (BC)
Pin Count	14	14	16	16

Parametrics

Parameters / Models	LT3479EDE#PBF	LT3479EDE#TRPBF	LT3479EFE#PBF	LT3479EFE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC843A,DC765B	DC843A,DC765B	DC843A,DC765B	DC843A,DC765B
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	Resistor Set Frequency	Resistor Set Frequency	Resistor Set Frequency	Resistor Set Frequency
Frequency, kHz	3500	3500	3500	3500
Frequency Adjust Range	200kHz - 3.5MHz	200kHz - 3.5MHz	200kHz - 3.5MHz	200kHz - 3.5MHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	0.1	0.1	0.1	0.1
Isupply, mA	5	5	5	5
Monolithic	yes	yes	yes	yes
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85
Polyphase	no	no	no	no
Switch Current, A	4.5	4.5	4.5	4.5
Synchronous	no	no	no	no
Topology	Boost, Inverting, Sepic, Flyback	Boost, Inverting, Sepic, Flyback	Boost, Inverting, Sepic, Flyback	Boost, Inverting, Sepic, Flyback
Vin Max, V	24	24	24	24
Vin Min, V	2.3	2.3	2.3	2.3
Vin Min Startup, V	2.3	2.3	2.3	2.3
Vout Max, V	42	42	42	42
Vout Min, V	1.235	1.235	1.235	1.235
Vswitch Max, V	42	42	42	42

Eco Plan

	LT3479EDE#PBF	LT3479EDE#TRPBF	LT3479EFE#PBF	LT3479EFE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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Tiny, Efficient High Power LED Camera Flash Solutions for Cell Phone Applications &mdash DN1009
PDF, 69 Kb, File published: Oct 1, 2004
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advertisement Tiny, Efficient High Power LED Camera Flash Solutions for
Cell Phone Applications вЂ“ Design Note 1009
Keith Szolusha
Introduction
Cell phones and PDAs are approaching the limit for small
form factors, but their feature sets are growing with new
functions such as built-in cameras and even video cameras.
The initial in-phone cameras were basic, low resolution devices with little in the way of usable flash capability. However, cell phone camera resolutions have improved and
sophisticated flash technology is expected to keep pace.
There are two flash technologies used in digital still cameras. The first uses a Xenon flash lamp to provide a very
short, high lumen flash with excellent spectral characteristics. LTC offers Xenon photoflash solutions that are
simple, compact and efficient (see Design Note 345).
The second flash technology uses LEDs. LED solutions hold
the upper hand when simplicity and space is at a premium
and they are the only choice when вЂ?torchвЂ™ or video-mode
lighting is required. LED flash units fit into spaces where
even the smallest Xenon photoflash cannot. Until recently,
LEDs could not compete with Xenon solutions in light
output and spectral performance, relegating them to the
realm of low resolution (sub 1 megapixel) cameras. However, recent (>10Г—) performance improvements have made LEDs an attractive solution for the now popular 1 megapixel
and higher cell phone cameras.
Linear Technology offers many simple and extremely
compact solutions for driving the latest high-light-output LEDs, including Lumileds Luxeon Flash LEDs. These …

Model Line

Series: LT3479 (4)

LT3479EDE#PBF LT3479EDE#TRPBF LT3479EFE#PBF LT3479EFE#TRPBF

Manufacturer's Classification

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