Datasheet Linear Technology LT3508

Manufacturer	Linear Technology
Series	LT3508

Dual Monolithic 1.4A Step-Down Switching Regulator

Datasheets

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PDF, 322 Kb, Language: en, File uploaded: Sep 18, 2017, Pages: 26
Dual Monolithic 1.4A Step-Down Switching Regulator

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Packaging

	LT3508EFE#PBF	LT3508EFE#TRPBF	LT3508EUF#PBF	LT3508EUF#TRPBF	LT3508HFE#PBF	LT3508HFE#TRPBF	LT3508HUF#PBF	LT3508HUF#TRPBF	LT3508IFE#PBF	LT3508IFE#TRPBF	LT3508IUF#PBF	LT3508IUF#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12
Package	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing
Package Code	FE	FE	UF	UF	FE	FE	UF	UF	FE	FE	UF	UF
Package Index	05-08-1663 (BA)	05-08-1663 (BA)	05-08-1697	05-08-1697	05-08-1663 (BA)	05-08-1663 (BA)	05-08-1697	05-08-1697	05-08-1663 (BA)	05-08-1663 (BA)	05-08-1697	05-08-1697
Pin Count	16	16	24	24	16	16	24	24	16	16	24	24

Parametrics

Parameters / Models	LT3508EFE#PBF	LT3508EFE#TRPBF	LT3508EUF#PBF	LT3508EUF#TRPBF	LT3508HFE#PBF	LT3508HFE#TRPBF	LT3508HUF#PBF	LT3508HUF#TRPBF	LT3508IFE#PBF	LT3508IFE#TRPBF	LT3508IUF#PBF	LT3508IUF#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
Demo Boards	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A	DC1060A
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
Features	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good	External Synchronization, Resistor Set Frequency, Anti-Phase Switching, Tracking, Power Good
Frequency, kHz	2500	2500	2500	2500	2500	2500	2500	2500	2500	2500	2500	2500
Frequency Adjust Range	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz
Frequency Sync Range	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz	250kHz - 2.5MHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Isupply, mA	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3
Max Phases	2	2	2	2	2	2	2	2	2	2	2	2
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	2	2	2	2	2	2	2	2	2	2	2	2
Operating Temperature Range, °C	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 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4
Output Current 2, A	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4
Polyphase	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Switch Current, A	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6
Switch Current 2, A	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6
Synchronous	no	no	no	no	no	no	no	no	no	no	no	no
Topology	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
Topology 2	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	36	36	36	36	36	36	36	36	36	36	36	36
Vin Min, V	3.7	3.7	3.7	3.7	3.7	3.7	3.7	3.7	3.7	3.7	3.7	3.7
Vout Max, V	35.28	35.28	35.28	35.28	35.28	35.28	35.28	35.28	35.28	35.28	35.28	35.28
Vout Maximum	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin	0.98Vin
Vout Min, V	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
Vout Min 2, V	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8

Eco Plan

	LT3508EFE#PBF	LT3508EFE#TRPBF	LT3508EUF#PBF	LT3508EUF#TRPBF	LT3508HFE#PBF	LT3508HFE#TRPBF	LT3508HUF#PBF	LT3508HUF#TRPBF	LT3508IFE#PBF	LT3508IFE#TRPBF	LT3508IUF#PBF	LT3508IUF#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

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36V Dual 1.4A Monolithic Step-Down Converter has Start-Up Tracking and Sequencing &mdash LT Journal
PDF, 732 Kb, File published: Jan 28, 2008
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DESIGN FEATURESвЂ‰L 36V Dual 1.4A Monolithic Step-Down
Converter has Start-Up Tracking and
by Keith Szolusha
Sequencing
Introduction
The LT3508 simplifies the design
of dual output, wide-input-range
power convertersвЂ”especially those
that require power supply tracking
and sequencing. It is a dual output
current mode PWM step-down DC/DC
converter with internal power switches
capable of generating a pair of 1.4A
outputs. Its wide 3.6V to 36V input
range makes it suitable for regulating
power from a wide variety of sources,
including automotive batteries, 24V
industrial supplies and unregulated
wall adaptors. Both converters are
synchronized to a single oscillator
programmable from 250kHz up to
2.5MHz and run with opposite phases,
reducing input ripple current. The high …

Model Line

Series: LT3508 (12)

LT3508EFE#PBF LT3508EFE#TRPBF LT3508EUF#PBF LT3508EUF#TRPBF LT3508HFE#PBF LT3508HFE#TRPBF LT3508HUF#PBF LT3508HUF#TRPBF LT3508IFE#PBF LT3508IFE#TRPBF LT3508IUF#PBF LT3508IUF#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators