Datasheet Linear Technology LTC7149

Manufacturer	Linear Technology
Series	LTC7149

60V, 4A Synchronous Step-Down Regulator for Inverting Outputs

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PDF, 482 Kb, Language: en, File uploaded: Mar 27, 2018, Pages: 26
60V, 4A Synchronous Step-Down Regulator for Inverting Outputs

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Prices

Packaging

	LTC7149EFE#PBF	LTC7149EFE#TRPBF	LTC7149EUFD#PBF	LTC7149EUFD#TRPBF	LTC7149IFE#PBF	LTC7149IFE#TRPBF	LTC7149IUFD#PBF	LTC7149IUFD#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	FE	FE	UFD	UFD	FE	FE	UFD	UFD
Package Index	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28	28	28

Parametrics

Parameters / Models	LTC7149EFE#PBF	LTC7149EFE#TRPBF	LTC7149EUFD#PBF	LTC7149EUFD#TRPBF	LTC7149IFE#PBF	LTC7149IFE#TRPBF	LTC7149IUFD#PBF	LTC7149IUFD#TRPBF
Architecture	Peak Current Mode	Peak Current Mode	Peak Current Mode	Peak Current Mode	Peak Current Mode	Peak Current Mode	Peak Current Mode	Peak Current Mode
Demo Boards	DC2354A	DC2354A	DC2354A	DC2354A	DC2354A	DC2354A	DC2354A	DC2354A
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
Export Control	no	no	no	no	no	no	no	no
Features	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,	Current Source Reference, Burst Mode, Resistor Set Frequency, External Synchronization,
Frequency, kHz	3000	3000	3000	3000	3000	3000	3000	3000
Frequency Adjust Range	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz
Frequency Sync Range	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz	300kHz to 3MHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	18	18	18	18	18	18	18	18
Isupply, mA	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	4	4	4	4	4	4	4	4
Polyphase	no	no	no	no	no	no	no	no
Switch Current, A	6	6	6	6	6	6	6	6
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting
Topology 1	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting
Vin Max, V	60	60	60	60	60	60	60	60
Vin Min, V	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4
Vout Max, V	28	28	28	28	28	28	28	28
Vout Maximum	28V	28V	28V	28V	28V	28V	28V	28V
Vref Accuracy Over Temp, %	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
Vswitch Max, V	60	60	60	60	60	60	60	60

Eco Plan

	LTC7149EFE#PBF	LTC7149EFE#TRPBF	LTC7149EUFD#PBF	LTC7149EUFD#TRPBF	LTC7149IFE#PBF	LTC7149IFE#TRPBF	LTC7149IUFD#PBF	LTC7149IUFD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Inverting Regulator Takes Inputs Up to 50V and Supports Outputs to 4A &mdash DN552
PDF, 397 Kb, File published: May 25, 2016
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Inverting Regulator Takes Inputs Up to 50V and Supports
Outputs to 4A
Design Note 552
Victor Khasiev
Introduction
Positive-to-negative DC/DC conversion (inverting
output) is widely used in LCD devices, OLED displays,
audio amplifiers, industrial equipment, measurement
tools, test systems, LED drivers and battery chargers.
In all of these cases, the inverting converter must be
compact, support high power and accommodate an
extended input voltage range. The LTC В®7149 satisfies
all of these requirements. Its integrated 4A switches
and wide 3.4V to 60V input voltage range exceed the
requirements of the most demanding applications,
including those in automotive environments.
Circuit Description and Functionality
FigureВ 1 shows a positive-to-negative converter based
on the LTC7149. This solution delivers вЂ“10V at 2A
from an input voltage of 12VвЂ”an automotive rail, for
511О© ITH 10nF LTC7149EFE ISET
MODE/SYNC RSET
200k …

Model Line

Series: LTC7149 (8)

LTC7149EFE#PBF LTC7149EFE#TRPBF LTC7149EUFD#PBF LTC7149EUFD#TRPBF LTC7149IFE#PBF LTC7149IFE#TRPBF LTC7149IUFD#PBF LTC7149IUFD#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Inverting Regulators