Datasheet Linear Technology LTC3531-3

Manufacturer	Linear Technology
Series	LTC3531-3

200mA Buck-Boost Synchronous DC/DC Converters

Datasheets

PDF, 728 Kb, Revision: B, File uploaded: Sep 21, 2017

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Prices

Packaging

	LTC3531EDD-3#PBF	LTC3531EDD-3#TRPBF	LTC3531ES6-3#TRMPBF	LTC3531ES6-3#TRPBF
N	1	2	3	4
Package	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing
Package Code	DD	DD	S6	S6
Package Index	05-08-1698	05-08-1698	05-08-1636	05-08-1636
Pin Count	8	8	6	6

Parametrics

Parameters / Models	LTC3531EDD-3#PBF	LTC3531EDD-3#TRPBF	LTC3531ES6-3#TRMPBF	LTC3531ES6-3#TRPBF
Architecture	Burst Mode Control	Burst Mode Control	Burst Mode Control	Burst Mode Control
Demo Boards	DC877A	DC877A	DC877A	DC877A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	Output Disconnect, Burst Mode, Fixed Output	Output Disconnect, Burst Mode, Fixed Output	Output Disconnect, Burst Mode, Fixed Output	Output Disconnect, Burst Mode, Fixed Output
Integrated Inductor	no	no	no	no
Ishutdown, µA	1	1	1	1
Isupply, mA	0.016	0.016	0.016	0.016
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
Output Current, A	0.2	0.2	0.2	0.2
Polyphase	no	no	no	no
Synchronous	yes	yes	yes	yes
Topology	Buck-Boost	Buck-Boost	Buck-Boost	Buck-Boost
Vin Max, V	5.5	5.5	5.5	5.5
Vin Min, V	1.8	1.8	1.8	1.8
Vout Max, V	3	3	3	3
Vout Min, V	3	3	3	3

Eco Plan

	LTC3531EDD-3#PBF	LTC3531EDD-3#TRPBF	LTC3531ES6-3#TRMPBF	LTC3531ES6-3#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Other Options

LTC3531 LTC3531-3.3

Articles

Download
Tiny Buck-Boost Converter for Low Current Applications &mdash LT Journal
PDF, 329 Kb, File published: Nov 21, 2006
Extract from the document
L DESIGN IDEAS Tiny Buck-Boost Converter for
Low Current Applications by Eddy Wells Introduction
One common challenge for many battery powered portable applications is
creating a regulated output voltage
above or below the input source. Traditional buck-boost approaches, such
as a dual inductor SEPIC converter or
cascaded regulators, are unacceptable
in most portable devices because of
their large solution size and low efп¬Ѓciency. Smaller footprint, integrated
charge-pump solutions can switch
between buck and boost operation, but
charge-pumps achieve good efп¬Ѓciency
at only a few operating voltages, while
efп¬Ѓciency dips below 50% at others.
Another compact and simple approach
forgoes a portion of the battery capacity and uses a buck (step-down) only
solution, but the advantages are hard
to justify when much of the battery
capacity is not used, as with certain
Li-Ion chemistries and a 3.3V output,
or with two alkaline cells and a 3.0V
or 2.5V output. two small ceramic capacitors, a miniature inductor, and the ThinSOT IC.
All versions of the part are available …

Model Line

Series: LTC3531-3 (4)

LTC3531EDD-3#PBF LTC3531EDD-3#TRPBF LTC3531ES6-3#TRMPBF LTC3531ES6-3#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Buck-Boost Regulators > Internal Power Switch Buck-Boost

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