Datasheet Linear Technology LTC3456

Manufacturer	Linear Technology
Series	LTC3456

2-Cell, Multi-Output DC/DC Converter with USB Power Manager

Datasheets

PDF, 480 Kb, Revision: A, File uploaded: Oct 21, 2017

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Prices

Packaging

	LTC3456EUF#PBF	LTC3456EUF#TRPBF
N	1	2
Package	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing
Package Code	UF	UF
Package Index	05-08-1697	05-08-1697
Pin Count	24	24

Parametrics

Parameters / Models	LTC3456EUF#PBF	LTC3456EUF#TRPBF
Battery Chemistry	Alkaline, NiCd, NiMH	Alkaline, NiCd, NiMH
Buck Output Current, A	0.15, 0.2	0.15, 0.2
Demo Boards	DC658A	DC658A
Export Control	no	no
Features	PowerPath, Fixed Output	PowerPath, Fixed Output
Number of Outputs	2	2
Operating Temperature Range, °C	0 to 85	0 to 85
PowerPath	Linear PowerPath, Internal Ideal Diode	Linear PowerPath, Internal Ideal Diode
Vin Max, V	5.5	5.5
Vin Min, V	1.8	1.8

Eco Plan

	LTC3456EUF#PBF	LTC3456EUF#TRPBF
RoHS	Compliant	Compliant

Design Notes

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Multiple Output DC/DC Converter Runs Off 2-Cell AA Batteries, USB or AC Wall Adapter &mdash DN1006
PDF, 80 Kb, File published: Sep 13, 2005
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advertisement Multiple Output DC/DC Converter Runs Off 2-Cell AA Batteries,
USB or AC Wall Adapter вЂ“ Design Note 1006
Gurjit Ghandi and Minjong Kim
The 3.3V and core supplies are generated by switching
regulators operating at 1MHz constant frequency. High
switching frequency allows the use of tiny, low profile
inductors and capacitors. All switchers are current mode
PWM type with internal compensation, reducing pin and
part counts. Introduction
The LTCВ®3456 is a low profile, total power management
solution optimized for the confined spaces and diverse
power requirements of mobile devices, including MP3
players, portable GPS units, digital cameras and handheld
computers. The LTC3456 seamlessly manages power
flow between an AC adapter, USB cable and a 2-cell AA
battery while complying with USB power standards and
fits in a 4mm Г— 4mm 24-pin QFN package. Complete Power Solution for Handhelds from
Two AA Cells
The circuit shown in Figure 1 generates five output
voltages from one of three power sources: AC adapter,
USB or 2-cell alkaline battery. The first output is the Core The device generates two separate power rails: a 3.3V
(fixed) main supply and a 1.8V (adjustable) core supply.
In addition, the LTC3456 contains a USB power manager, …

Articles

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Complete 2-Cell-AA/USB Power Manager in a 4mm × 4mm QFN &mdash LT Journal
PDF, 391 Kb, File published: Sep 1, 2005
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DESIGN FEATURES Complete 2-Cell-AA/USB Power
Manager in a 4mm Г— 4mm QFN by G. Thandi Introduction
One of the most popular battery solutions for consumer handheld devices
is the venerable two-cell AA (alkaline
or nickel-metal hydride) source,
especially in GPS navigators, digital
cameras and MP3 players. AA batteries are readily available, relatively
low cost and offer high power density.
Many of these same portable devices
supplement battery power with plugin wall adapter and offer a USB bus
(for data transfer). The USB bus can
also be used to provide power. The
problem is how to seamlessly switch
between these three disparate types
of supplies: 2-cell AA, wall and USB.
The solution is the LTC3456.
The LTC3456 is a complete system
power IC that seamlessly manages
power п¬‚ow between an AC wall adapter,
USB and 2-AA battery, while complying with USB power standardsвЂ”all
in a 4mm Г— 4mm QFN package
(Figure1). The device generates two
separate power rails: a 3.3V (п¬Ѓxed) …

Model Line

Series: LTC3456 (2)

LTC3456EUF#PBF LTC3456EUF#TRPBF

Manufacturer's Classification

Power Management > PMIC & Multifunction > PMIC (DC/DC, PowerPath and Battery Charger)

EMS supplier

Slices

Microcontrollers