Datasheet Linear Technology LT8613

Manufacturer	Linear Technology
Series	LT8613

42V, 6A Synchronous Step-Down Regulator with Current Sense and 3µA Quiescent Current

Datasheets

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PDF, 367 Kb, Language: en, File uploaded: Sep 20, 2017, Pages: 24
42V, 6A Synchronous Step-Down Regulator with Current Sense and 3μA Quiescent Current

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Packaging

	LT8613EUDE#PBF	LT8613EUDE#TRPBF	LT8613IUDE#PBF	LT8613IUDE#TRPBF
N	1	2	3	4
Package	3x6 QFN-28 Package Outline Drawing	3x6 QFN-28 Package Outline Drawing	3x6 QFN-28 Package Outline Drawing	3x6 QFN-28 Package Outline Drawing
Package Code	UDE	UDE	UDE	UDE
Package Index	05-08-1926	05-08-1926	05-08-1926	05-08-1926
Pin Count	28	28	28	28

Parametrics

Parameters / Models	LT8613EUDE#PBF	LT8613EUDE#TRPBF	LT8613IUDE#PBF	LT8613IUDE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC2011A	DC2011A	DC2011A	DC2011A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good, Output Current Regulation, Output Current Monitor, Input Current Regulation, Input Current Monitor	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good, Output Current Regulation, Output Current Monitor, Input Current Regulation, Input Current Monitor	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good, Output Current Regulation, Output Current Monitor, Input Current Regulation, Input Current Monitor	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good, Output Current Regulation, Output Current Monitor, Input Current Regulation, Input Current Monitor
Frequency, kHz	2200	2200	2200	2200
Ishutdown, µA	1	1	1	1
Isupply, mA	0.0017	0.0017	0.0017	0.0017
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	6	6	6	6
Switch Current, A	9.7	9.7	9.7	9.7
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	42	42	42	42
Vin Min, V	3.4	3.4	3.4	3.4
Vout Max, V	41.58	41.58	41.58	41.58

Eco Plan

	LT8613EUDE#PBF	LT8613EUDE#TRPBF	LT8613IUDE#PBF	LT8613IUDE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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42V High Power Density Buck Regulators in a Tiny QFN Package &mdash DN1038
PDF, 331 Kb, File published: Dec 4, 2015
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42V High Power Density Buck Regulators in a Tiny QFN
Package
Design Note 1038
Ying Cheng
Introduction
Power dissipation is a significant problem facing the
designers of DC/DC converters in industrial and automotive applications, where high currents are required,
but space is limited. It is possible to produce a highly
efficient regulator from high performance discrete
components, but expense and solution footprint make
this approach prohibitive. The LT8612/LT8613 high
efficiency buck regulators integrate all the necessary
components into a single IC, significantly reducing
the DC/DC converter size, even when faced with high
step-down ratios. These devices can also be paralleled
to increase the output current capability and spread
the load and heat. high efficiency power switches allows these switches,
the boost diode, internal compensation and all necessary circuitry to be encapsulated in a tiny 3mm Г— 6mm
QFN package without overheating. Figure 1 shows a
typical 5V/30W LT8612 converter; its efficiency and
power loss are demonstrated in Figure 2. Even with
an input voltage of 24V, the LT8612 can produce a
30W output with no more than 50В°C temperature rise. …

Articles

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42V High Power Density Buck Regulators in a Tiny QFN Package &mdash LT Journal
PDF, 334 Kb, File published: Aug 11, 2016
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42V High Power Density Buck Regulators in a Tiny QFN
Package
Ying Cheng Power dissipation is a significant problem facing the designers of DC/DC converters
in industrial and automotive applications, where high currents are required, but space
is limited. It is possible to produce a highly efficient regulator from high performance
discrete components, but expense and solution footprint make this approach
prohibitive. The LT8612/LT8613 high efficiency buck regulators integrate all the
necessary components into a single IC, significantly reducing the DC/DC converter
size, even when faced with high step-down ratios. These devices can also be
paralleled to increase the output current capability and spread the load and heat.
Other desirable features included in these
regulators are ultralow quiescent current
to maximize battery life, and high switching frequency to minimize solution size
and avoid noise-sensitive frequency bands. Figure 2. Even with an input voltage
of 24V, the LT8612 can produce a 30W
output with no more than 50В°C temperature rise. At the other end of the load
spectrum, the LT8612/LT8613 uses low
ripple Burst ModeВ® operation to enhance
efficiency in ultralow load situations. HIGHLY EFFICIENT 42V, 6A
REGULATORS IN
3mm Г— 6mm PACKAGE The minimum on-times of LT8612/
LT8613 are as low as 40ns, allowing
for high VIN/VOUT ratios even at high …

Model Line

Series: LT8613 (4)

LT8613EUDE#PBF LT8613EUDE#TRPBF LT8613IUDE#PBF LT8613IUDE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck
Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers