LTC7149IFE#TRPBF

Active

Analog Devices Inc./Maxim Integrated

CONV DC-DC 3.4V TO 60V SYNCHRONOUS STEP DOWN SINGLE-OUT 0V TO -28V 4A 28-PIN TSSOP EP T/R

Find alt

Alpha

LTC7149IFE#TRPBF

Active

Analog Devices Inc./Maxim Integrated

CONV DC-DC 3.4V TO 60V SYNCHRONOUS STEP DOWN SINGLE-OUT 0V TO -28V 4A 28-PIN TSSOP EP T/R

Find alt

Alpha

Description Specifications Series Pricing CAD Documents

Description

General part information

LTC7149 Series

The LTC7149 is a high efficiency 60V, 4A synchronous monolithic step-down regulator for inverting output applications. The regulator features a single resistor programmable output voltage and high efficiency over a wide VOUTrange.The inverting regulator operates from an input voltage range of 3.4V to 60V and provides an adjustable output from (–28V) to zero volts while delivering up to 4A of inductor current. The switching frequency is also set with an external resistor. A user-selectable mode input is provided to allow the user to trade off ripple noise for efficiency at light loads; Burst Mode operation provides the highest efficiency at light loads, while forced continuous mode provides low output ripple. The MODE/SYNC pin can also be used to synchronize the switching frequency to an external clock. Internal level-shift circuits allow the I/O pins (RUN, MODE/SYNC, PGOOD) to be referenced to board GND.The LTC7149 operates with a peak current mode architecture that allows for fast transient response with inherent cycle-to-cycle current limit protection.ApplicationsIndustrial ApplicationsTelecom Power SuppliesDistributed Power Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC7149IFE#TRPBF

Current - Output	4 A
Frequency - Switching	1 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Negative
Output Type	Adjustable
Package Features	Exposed Pad
Package Length	0.173 in
Package Name	28-TSSOP-EP, 28-TSSOP
Package Width	4.4 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	60 V
Voltage - Input (Min)	3.4 V
Voltage - Output (Max)	-28 V
Voltage - Output (Min/Fixed)	0 V

LTC7149 Series

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

Part	Frequency - Switching	Voltage - Input (Max)	Topology	Function	Output Type	Package Name	Number of Outputs	Operating Temperature (Max)	Operating Temperature (Min)	Current - Output	Output Configuration	Voltage - Output (Max)	Mounting Type	Synchronous Rectifier	Voltage - Input (Min)	Package Width	Package Features	Package Length	Package / Case
Analog Devices Inc./Maxim Integrated LTC7149IFE#TRPBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-TSSOP 28-TSSOP-EP	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	4.4 mm	Exposed Pad	0.173 in
Analog Devices Inc./Maxim Integrated LTC7149EUFD#TRPBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-QFN	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	5 mm		4 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7149EFE#TRPBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-TSSOP 28-TSSOP-EP	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	4.4 mm	Exposed Pad	0.173 in
Analog Devices Inc./Maxim Integrated LTC7149IUFD#PBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-QFN	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	5 mm		4 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7149IUFD#TRPBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-QFN	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	5 mm		4 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7149EUFD#PBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-QFN	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	5 mm		4 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7149IFE#PBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-TSSOP 28-TSSOP-EP	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	4.4 mm	Exposed Pad	0.173 in
Analog Devices Inc./Maxim Integrated LTC7149EFE#PBF	1 MHz	60 V	Buck	Step-Down	Adjustable	28-TSSOP 28-TSSOP-EP	1	125 °C	-40 °C	4 A	Negative	-28 V	Surface Mount	Yes	3.4 V	4.4 mm	Exposed Pad	0.173 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Create a free account to access distributor pricing data.

CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC7149IFE#TRPBF | Datasheet

Tape and Reel Packaging

R539 Reliability Data

Package Drawing - 28-Lead TSSOP w/ EP