Datasheet Linear Technology LTC3555

Manufacturer	Linear Technology
Series	LTC3555

High Efficiency USB Power Manager + Triple Step-Down DC/DC

Datasheets

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PDF, 389 Kb, Revision: E, File uploaded: Oct 22, 2017

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Packaging

	LTC3555EUFD#PBF	LTC3555EUFD#TRPBF	LTC3555EUFD-1#PBF	LTC3555EUFD-1#TRPBF	LTC3555EUFD-3#PBF	LTC3555EUFD-3#TRPBF	LTC3555IUFD#PBF	LTC3555IUFD#TRPBF	LTC3555IUFD-1#PBF	LTC3555IUFD-1#TRPBF	LTC3555IUFD-3#PBF	LTC3555IUFD-3#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12
Package	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	UFD	UFD	UFD	UFD	UFD	UFD	UFD	UFD	UFD	UFD	UFD	UFD
Package Index	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28	28	28	28	28	28	28

Parametrics

Parameters / Models	LTC3555EUFD#PBF	LTC3555EUFD#TRPBF	LTC3555EUFD-1#PBF	LTC3555EUFD-1#TRPBF	LTC3555EUFD-3#PBF	LTC3555EUFD-3#TRPBF	LTC3555IUFD#PBF	LTC3555IUFD#TRPBF	LTC3555IUFD-1#PBF	LTC3555IUFD-1#TRPBF	LTC3555IUFD-3#PBF	LTC3555IUFD-3#TRPBF
Battery Chemistry	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer
Buck Output Current, A	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1	0.4, 0.4, 1
Demo Boards	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B	DC1020A,DC1376A-A,DC1376A-B
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
Features	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode	Triple Buck, LDO, PowerPath, Bat-Track, Battery Charger, Burst Mode
Float Voltage, V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V	4.2V
LDO Output Current, A	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025
Max Charge Current, A	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
Number of Cells	1	1	1	1	1	1	1	1	1	1	1	1
Number of Outputs	4	4	4	4	4	4	4	4	4	4	4	4
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
PowerPath	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode
Subname	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555	LTC3555
Type of Charger	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear
Vin Max, V	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
Vin Min, V	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7

Eco Plan

	LTC3555EUFD#PBF	LTC3555EUFD#TRPBF	LTC3555EUFD-1#PBF	LTC3555EUFD-1#TRPBF	LTC3555EUFD-3#PBF	LTC3555EUFD-3#TRPBF	LTC3555IUFD#PBF	LTC3555IUFD#TRPBF	LTC3555IUFD-1#PBF	LTC3555IUFD-1#TRPBF	LTC3555IUFD-3#PBF	LTC3555IUFD-3#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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USB Power Solution Includes Switching Power Manager, Battery Charger, Three Synchronous Buck Regulators and LDO &mdash DN420
PDF, 84 Kb, File published: Jul 13, 2007
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USB Power Solution Includes Switching Power Manager,
Battery Charger, Three Synchronous Buck Regulators and LDO
Design Note 420
Brian Shaffer
Introduction
Linear Technology offers a variety of parts to simplify the
task of extracting power from a battery or a USB cable. These
devices seamlessly manage the power п¬‚ow between an
AC adapter, USB cable and Li-Ion battery, all while maintaining USB power speciп¬Ѓcation compliance. As battery
capacities rise, battery chargers must keep pace by
steadily improving efп¬Ѓciency to minimize thermal concerns
and charge times. A USB-based battery charger must
squeeze as much power from the USB as possible, and
do it efп¬Ѓciently to meet the stringent space and thermal
constraints of todayвЂ™s power-intensive applications.
The LTCВ® 3555 combines a USB switching power manager
and battery charger with three synchronous buck regulators and an LDO to provide a complete power supply
solution in one small (4mm Г— 5mm) package (Figure 1).
The constant-current, constant-voltage Lithium-Ion/Polymer charger utilizes a Bat-Trackв„ў feature to maximize the
efп¬Ѓciency of the battery charger by generating an input
voltage that automatically tracks the battery voltage
(described below). An I2C serial interface affords the
system designer complete control over the charger and USB/WALL …

Articles

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New Family of Integrated Power Controllers Combine Fast Battery Charging, PowerPath Control and Efficient DC/DC Converters in Less Than 20mm2 &mdash LT Journal
PDF, 303 Kb, File published: Sep 23, 2008
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LвЂ‰DESIGN FEATURES New Family of Integrated Power
Controllers Combine Fast Battery
Charging, PowerPath Control and
Efficient DC/DC Converters in
by Sam Nork
Less Than 20mm2
Introduction
The quickest way to build an efficient
power system for a battery-powered
portable application is to use an
IC that combines all power control
functions into a single chip, namely a
Power Management Integrated Circuit
(PMIC). PMICs seamlessly manage
power flow from various power sources
(wall adapters, USB and batteries) to
power loads (device systems and the
charging battery), while maintaining
current limits where required (such
as that specified for USB). To this
end, PMICs typically feature built-in
PowerPathв„ў control, DC/DC conver-USB/WALL
4.35V TO 5.5V TO OTHER …

Model Line

Series: LTC3555 (12)

LTC3555EUFD#PBF LTC3555EUFD#TRPBF LTC3555EUFD-1#PBF LTC3555EUFD-1#TRPBF LTC3555EUFD-3#PBF LTC3555EUFD-3#TRPBF LTC3555IUFD#PBF LTC3555IUFD#TRPBF LTC3555IUFD-1#PBF LTC3555IUFD-1#TRPBF LTC3555IUFD-3#PBF LTC3555IUFD-3#TRPBF

Manufacturer's Classification

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