Datasheet Linear Technology LT3501

Manufacturer	Linear Technology
Series	LT3501

Monolithic Dual Tracking 3A Step-Down Switching Regulator

Datasheets

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PDF, 450 Kb, Language: en, File uploaded: Sep 18, 2017, Pages: 30
Monolithic Dual Tracking 3A Step-Down Switching Regulator

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Packaging

	LT3501EFE#PBF	LT3501EFE#TRPBF	LT3501IFE#PBF	LT3501IFE#TRPBF
N	1	2	3	4
Package	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing
Package Code	FE	FE	FE	FE
Package Index	05-08-1663 (CB)	05-08-1663 (CB)	05-08-1663 (CB)	05-08-1663 (CB)
Pin Count	20	20	20	20

Parametrics

Parameters / Models	LT3501EFE#PBF	LT3501EFE#TRPBF	LT3501IFE#PBF	LT3501IFE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC964A	DC964A	DC964A	DC964A
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no
Features	Anti-Phase Switching, Tracking, Power Good, Resistor Set Frequency, External Synchronization	Anti-Phase Switching, Tracking, Power Good, Resistor Set Frequency, External Synchronization	Anti-Phase Switching, Tracking, Power Good, Resistor Set Frequency, External Synchronization	Anti-Phase Switching, Tracking, Power Good, Resistor Set Frequency, External Synchronization
Frequency, kHz	1500	1500	1500	1500
Frequency Adjust Range	250kHz - 1.5MHz	250kHz - 1.5MHz	250kHz - 1.5MHz	250kHz - 1.5MHz
Frequency Sync Range	250kHz - 1.5MHz	250kHz - 1.5MHz	250kHz - 1.5MHz	250kHz - 1.5MHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	9	9	9	9
Isupply, mA	3.5	3.5	3.5	3.5
Max Phases	2	2	2	2
Monolithic	yes	yes	yes	yes
Number of Outputs	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	3	3	3	3
Output Current 2, A	3	3	3	3
Polyphase	yes	yes	yes	yes
Switch Current, A	4	4	4	4
Switch Current 2, A	4	4	4	4
Synchronous	no	no	no	no
Topology	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck
Vin Max, V	25	25	25	25
Vin Min, V	3.3	3.3	3.3	3.3
Vout Max, V	23.75	23.75	23.75	23.75
Vout Maximum	.95Vin	.95Vin	.95Vin	.95Vin
Vout Min, V	0.8	0.8	0.8	0.8
Vout Min 2, V	1.25	1.25	1.25	1.25

Eco Plan

	LT3501EFE#PBF	LT3501EFE#TRPBF	LT3501IFE#PBF	LT3501IFE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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A Compact Dual Step-Down Converter with VOUT Tracking and Sequencing &mdash DN403
PDF, 97 Kb, File published: Nov 7, 2006
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advertisement A Compact Dual Step-Down Converter with VOUT Tracking and
Sequencing вЂ“ Design Note 403
Tiger Zhou and David Canny
Introduction
Typical industrial and automotive applications require
multiple high current, low voltage power supply solutions
to drive everything from disc drives to microprocessors. For many of these applications, particularly those
that have size constraints, the LT3501В® dual step-down
converter is an attractive solution because itвЂ™s compact
and inexpensive compared to a 2-chip solution. The dual
converter accommodates a 3V to 25V input voltage range
and is capable of supplying up to 3A per channel. The
circuit in Figure 1 produces 3.3V and 1.8V.
LT3501 Dual Converter Features The LT3501 is feature-rich and comes with internal 3.5A
switches and sense resistors to minimize solution size
and cost. The LT3501 operates at a п¬Ѓxed frequency between
250kHz and 1.5MHz, programmed using a single resistor or synchronized to an external clock, allowing
optimization of efп¬Ѓciency and solution size. A 180В° phase relationship between the channels is
maintained to reduce input voltage ripple and input
capacitor size. Independent input voltage, feedback, soft-start and
power good functions for each converter simplify the
implementation of all the tracking and sequencing
options available. Minimum input-to-output voltage ratios are extended …

Model Line

Series: LT3501 (4)

LT3501EFE#PBF LT3501EFE#TRPBF LT3501IFE#PBF LT3501IFE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck