Integrated Circuits (ICs)

LM2598S-ADJ/NOPB

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4.5V TO 40V, 1A SIMPLE SWITCHER® BUCK CONVERTER

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DocumentsThe importance of accurate switching frequency and current limit when selecting bu AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B)+17

Integrated Circuits (ICs)

LM2598S-ADJ/NOPB

Active

Texas Instruments

4.5V TO 40V, 1A SIMPLE SWITCHER® BUCK CONVERTER

Deep-Dive with AI

DocumentsThe importance of accurate switching frequency and current limit when selecting bu AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B)+17

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM2598S-ADJ/NOPB

Current - Output	1 A
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	D2PAK (7 Leads + Tab), TO-263-8, TO-263CA
Supplier Device Package	TO-263 (DDPAK-7)
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max)	37 V
Voltage - Output (Min/Fixed)	1.2 V

LM2598 Series

4.5V to 40V, 1A SIMPLE SWITCHER® buck converter

Part	Output Configuration	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Mounting Type	Number of Outputs	Voltage - Output (Max)	Function	Package / Case	Voltage - Input (Min) [Min]	Current - Output	Supplier Device Package	Voltage - Output (Min/Fixed)	Output Type
Texas Instruments LM2598S-ADJ/NOPB	Positive	Adjustable	-40 °C	125 ¯C	Buck	Surface Mount	1	37 V	Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	1.2 V
Texas Instruments LM2598SX-5.0	Positive		-40 °C	125 ¯C	Buck	Surface Mount	1		Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	5 V	1.81 mOhm
Texas Instruments LM2598T-5.0	Positive		-40 °C	125 ¯C	Buck	Through Hole	1		Step-Down	TO-220-7 Formed Leads	4.5 V	1 A	TO-220-7	5 V	1.81 mOhm
Texas Instruments LM2598SX-3.3/NOPB	Positive		-40 °C	125 ¯C	Buck	Surface Mount	1		Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	3.3 V	1.81 mOhm
Texas Instruments LM2598T-12/NOPB	Positive		-40 °C	125 ¯C	Buck	Through Hole	1		Step-Down	TO-220-7 Formed Leads	4.5 V	1 A	TO-220-7	12 V	1.81 mOhm
Texas Instruments LM2598SX-ADJ	Positive	Adjustable	-40 °C	125 ¯C	Buck	Surface Mount	1	37 V	Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	1.2 V
Texas Instruments LM2598T-3.3/NOPB	Positive		-40 °C	125 ¯C	Buck	Through Hole	1		Step-Down	TO-220-7 Formed Leads	4.5 V	1 A	TO-220-7	3.3 V	1.81 mOhm
Texas Instruments LM2598S-3.3/NOPB	Positive		-40 °C	125 ¯C	Buck	Surface Mount	1		Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	3.3 V	1.81 mOhm
Texas Instruments LM2598SX-12/NOPB	Positive		-40 °C	125 ¯C	Buck	Surface Mount	1		Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	12 V	1.81 mOhm
Texas Instruments LM2598SX-12	Positive		-40 °C	125 ¯C	Buck	Surface Mount	1		Step-Down	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	4.5 V	1 A	TO-263 (DDPAK-7)	12 V	1.81 mOhm

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 4.42
		10	$ 3.97
		45	$ 3.75
		135	$ 3.25
		270	$ 3.09
		540	$ 2.77
		1035	$ 2.34
		2520	$ 2.22
Texas Instruments	TUBE	1	$ 3.34
		100	$ 2.92
		250	$ 2.05
		1000	$ 1.65

Description

General part information

LM2598 Series

The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

The LM2598 is a member of the LM259x family.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, fixed-frequency oscillator,Shutdown/Soft-start, error flag delay and error flag output.

Documents

Technical documentation and resources

LM2598S-ADJ/NOPB

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LM2598S-ADJ/NOPB

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Technical Specifications

LM2598 Series

Pricing

Description

LM2598 Series

Documents

The importance of accurate switching frequency and current limit when selecting bu

AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B)

AN-1197 Selecting Inductors for Buck Converters (Rev. B)

AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)

Input and Output Capacitor Selection

AN-643 EMI/RFI Board Design (Rev. B)

AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)

Advantages of leaded packages in robust industrial designs

AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)

AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)

LM2598 SIMPLE SWITCHER® Power Converter 150-kHz 1-A Step-Down Voltage Regulator, With Features datasheet (Rev. D)

AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)

Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)

AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)

Semiconductor and IC Package Thermal Metrics (Rev. D)

How to increase system reliability and simplify design using DC/DC converters

AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

Simple Techniques Minimize Cross-Coupling in Distributed Power Systems

AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

LM2598 Series