Datasheet Linear Technology LTC3606B

Manufacturer	Linear Technology
Series	LTC3606B

800mA Synchronous Step-Down DC/DC with Average Input Current Limit

Datasheets

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PDF, 354 Kb, Language: en, File uploaded: Sep 22, 2017, Pages: 20
800mA Synchronous Step-Down DC/DC with Average Input Current Limit

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Packaging

	LTC3606BEDD#PBF	LTC3606BEDD#TRPBF	LTC3606BIDD#PBF	LTC3606BIDD#TRPBF
N	1	2	3	4
Package	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing
Package Code	DD	DD	DD	DD
Package Index	05-08-1698	05-08-1698	05-08-1698	05-08-1698
Pin Count	8	8	8	8

Parametrics

Parameters / Models	LTC3606BEDD#PBF	LTC3606BEDD#TRPBF	LTC3606BIDD#PBF	LTC3606BIDD#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	Programmable Input Current Limit, Power Good, 100% Duty Cycle	Programmable Input Current Limit, Power Good, 100% Duty Cycle	Programmable Input Current Limit, Power Good, 100% Duty Cycle	Programmable Input Current Limit, Power Good, 100% Duty Cycle
Frequency, kHz	2500	2500	2500	2500
Integrated Inductor	no	no	no	no
Ishutdown, µA	0.1	0.1	0.1	0.1
Isupply, mA	0.42	0.42	0.42	0.42
Max Phases	1	1	1	1
Monolithic	yes	yes	yes	yes
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	0.8	0.8	0.8	0.8
Polyphase	no	no	no	no
Switch Current, A	2.4	2.4	2.4	2.4
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	5.5	5.5	5.5	5.5
Vin Min, V	2.5	2.5	2.5	2.5
Vout Max, V	5	5	5	5
Vout Maximum	Vin	Vin	Vin	Vin
Vout Min, V	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	3	3	3	3

Eco Plan

	LTC3606BEDD#PBF	LTC3606BEDD#TRPBF	LTC3606BIDD#PBF	LTC3606BIDD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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Complete Energy Utilization Improves Run Time of a Supercap Ride-Through Application by 40% &mdash DN485
PDF, 106 Kb, File published: Oct 26, 2010
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Complete Energy Utilization Improves Run Time of a Supercap
Ride-Through Application by 40% вЂ“ Design Note 485
George H. Barbehenn
Introduction
Many electronic systems require a local power source that
allows them to ride through brief main power interruptions without shutting down. Some local power sources
must be available to carry out a controlled shutdown if
the main power input is abruptly removed. Complete Energy Utilization Maximizes Run Time
of Supercap Ride-Through Application
Figure 1 shows a complete 3.3V/200mA ride-through application that maximizes the amount of power extracted
from the supercap to support the load. A battery backup can supply power in the event of a
mains shutdown, but batteries are not well suited to
this particular application. Although batteries can store
signiп¬Ѓcant amounts of energy, they cannot deliver much
power due to their signiп¬Ѓcant source impedance. Also,
batteries have п¬Ѓnite lives of ~2 to 3 years, and the maintenance required for rechargeable batteries is substantial. The LTC В®4425 complete 2A supercapacitor charger. It
clamps the individual cell voltages to ensure that the
cells do not overvoltage during charging and balances
the cells throughout charge and discharge. The main components of the ride-through application
include: The LTC3606 micropower buck regulator produces
the regulated 3.3V output. Supercapacitors are well suited to such ride-through
applications. Their low source impedance allows them
to supply signiп¬Ѓcant power for a relatively short time, …

Model Line

Series: LTC3606B (4)

LTC3606BEDD#PBF LTC3606BEDD#TRPBF LTC3606BIDD#PBF LTC3606BIDD#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck
Power Management > Supercapacitor Chargers