Datasheet Linear Technology LT8608

Manufacturer	Linear Technology
Series	LT8608

42V, 1.5A Synchronous Step-Down Regulator with 2.5µA Quiescent Current

Datasheets

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PDF, 434 Kb, Revision: B, File uploaded: Mar 27, 2018

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Prices

Packaging

	LT8608EDC#PBF	LT8608EDC#TRMPBF	LT8608EDC#TRPBF	LT8608EMSE#PBF	LT8608EMSE#TRPBF	LT8608HDC#PBF	LT8608HDC#TRMPBF	LT8608HDC#TRPBF	LT8608HMSE#PBF	LT8608HMSE#TRPBF	LT8608IDC#PBF	LT8608IDC#TRMPBF	LT8608IDC#TRPBF	LT8608IMSE#PBF	LT8608IMSE#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Package	2x2 DFN-8 Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	2x2 DFN-8 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing
Package Code	DC	DC	DC	MSE	MSE	DC	DC	DC	MSE	MSE	DC	DC	DC	MSE	MSE
Package Index	05-08-1957	05-08-1957	05-08-1957	05-08-1664	05-08-1664	05-08-1957	05-08-1957	05-08-1957	05-08-1664	05-08-1664	05-08-1957	05-08-1957	05-08-1957	05-08-1664	05-08-1664
Pin Count	8	8	8	10	10	8	8	8	10	10	8	8	8	10	10

Parametrics

Parameters / Models	LT8608EDC#PBF	LT8608EDC#TRMPBF	LT8608EDC#TRPBF	LT8608EMSE#PBF	LT8608EMSE#TRPBF	LT8608HDC#PBF	LT8608HDC#TRMPBF	LT8608HDC#TRPBF	LT8608HMSE#PBF	LT8608HMSE#TRPBF	LT8608IDC#PBF	LT8608IDC#TRMPBF	LT8608IDC#TRPBF	LT8608IMSE#PBF	LT8608IMSE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A	DC2458A
Design Tools	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File
Export Control	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good	Burst Mode, Resistor Set Frequency, External Synchronization, Spread Spectrum, Power Good
Frequency, kHz	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
Frequency Adjust Range	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz
Frequency Sync Range	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz	200kHz to 2.2MHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Isupply, mA	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017	0.0017
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output 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	1.5	1.5	1.5
Polyphase	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Switch Current, A	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9	2.9
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	42	42	42	42	42	42	42	42	42	42	42	42	42	42	42
Vin Min, V	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Vout Max, V	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5	41.5
Vout Maximum	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn	0.99VIn
Vout Min, V	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778	0.778
Vref Accuracy Over Temp, %	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5

Eco Plan

	LT8608EDC#PBF	LT8608EDC#TRMPBF	LT8608EDC#TRPBF	LT8608EMSE#PBF	LT8608EMSE#TRPBF	LT8608HDC#PBF	LT8608HDC#TRMPBF	LT8608HDC#TRPBF	LT8608HMSE#PBF	LT8608HMSE#TRPBF	LT8608IDC#PBF	LT8608IDC#TRMPBF	LT8608IDC#TRPBF	LT8608IMSE#PBF	LT8608IMSE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Bidirectional DC/DC Regulator and Supercapacitor Charger &mdash DN558
PDF, 299 Kb, File published: Nov 14, 2016
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Bidirectional DC/DC Regulator and
Supercapacitor Charger
Design Note 558
Victor Khasiev
Introduction
The LTC В®3110 bidirectional buck-boost DC/DC regulator charges and balances a supercapacitor when a bus
voltage is present (for example 3.3V) and discharges
the supercapacitor into the load when the bus fails.
The LTC3110 maintains the busвЂ™s nominal level (3.3VВ in
the example in Figure 1) even if the supercapacitor
voltage is above or below the nominal bus voltage.
Supporting the load this way allows data backup and
retention during a power interruptionвЂ”important in a
wide variety of industrial and automotive applications. Industrial applications, however, share something
in common with consumer electronics: the trend
toward increased portability and mobility. Space is
increasingly limited for electronics inside modern
industrial equipment. The volume, in particular the
thickness, of a data storage unit is at a premium in
industrial assemblies and modules. With that in mind,
the solution herein aims to minimize the profiles of
the selected components. Table 1 shows two passive
component group options, arranged by thickness: …

Model Line

Series: LT8608 (15)

LT8608EDC#PBF LT8608EDC#TRMPBF LT8608EDC#TRPBF LT8608EMSE#PBF LT8608EMSE#TRPBF LT8608HDC#PBF LT8608HDC#TRMPBF LT8608HDC#TRPBF LT8608HMSE#PBF LT8608HMSE#TRPBF LT8608IDC#PBF LT8608IDC#TRMPBF LT8608IDC#TRPBF LT8608IMSE#PBF LT8608IMSE#TRPBF

Manufacturer's Classification

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