Specification	LM2587T-3.3/NOPB

Current - Output	5 A
Frequency - Switching	100 kHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	TO-220-5 Formed Leads
Supplier Device Package	TO-220-5
Synchronous Rectifier	False
Topology	Flyback, Boost, Forward Converter
Voltage - Input (Min) [Min]	4 V
Voltage - Output (Min/Fixed)	3.3 V

LM2587 Series

4V to 40V, 5A Step-Up Wide Vin Flyback Regulator

Part	Frequency - Switching	Topology	Supplier Device Package	Output Configuration	Voltage - Output (Min/Fixed)	Current - Output	Mounting Type	Function	Number of Outputs	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Output Type	Voltage - Input (Min) [Min]	Output Type	Voltage - Output (Max) [Max]
Texas Instruments LM2587T-12	100 kHz	Boost Flyback Forward Converter	TO-220-5	Positive	12 V	5 A	Through Hole	Step-Up Step-Up/Step-Down	1	TO-220-5 Formed Leads	-40 °C	125 ¯C	1.81 mOhm	4 V
Texas Instruments LM2587T-ADJ	100 kHz	Boost Flyback Forward Converter	TO-220-5	Positive	1.23 V	5 A	Through Hole	Step-Up Step-Up/Step-Down	1	TO-220-5 Formed Leads	-40 °C	125 ¯C		4 V	Adjustable	60 V
Texas Instruments LM2587S-ADJ/NOPB	100 kHz	Boost Flyback Forward Converter	TO-263 (DDPAK-5)	Positive	1.23 V	5 A	Surface Mount	Step-Up Step-Up/Step-Down	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	-40 °C	125 ¯C		4 V	Adjustable	60 V
Texas Instruments LM2587SX-12/NOPB	100 kHz	Boost Flyback Forward Converter	TO-263 (DDPAK-5)	Positive	12 V	5 A	Surface Mount	Step-Up Step-Up/Step-Down	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	-40 °C	125 ¯C	1.81 mOhm	4 V
Texas Instruments LM2587T-5.0/NOPB	100 kHz	Boost Flyback Forward Converter	TO-220-5	Positive	5 V	5 A	Through Hole	Step-Up Step-Up/Step-Down	1	TO-220-5 Formed Leads	-40 °C	125 ¯C	1.81 mOhm	4 V
Texas Instruments LM2587T-ADJ/LF03	100 kHz	Boost Flyback Forward Converter	TO-220-5	Positive	1.23 V	5 A	Through Hole	Step-Up Step-Up/Step-Down	1	TO-220-5 Formed Leads	-40 °C	125 ¯C		4 V	Adjustable	60 V
Texas Instruments LM2587S-12/NOPB	100 kHz	Boost Flyback Forward Converter	TO-263 (DDPAK-5)	Positive	12 V	5 A	Surface Mount	Step-Up Step-Up/Step-Down	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	-40 °C	125 ¯C	1.81 mOhm	4 V
Texas Instruments LM2587T-3.3/NOPB	100 kHz	Boost Flyback Forward Converter	TO-220-5	Positive	3.3 V	5 A	Through Hole	Step-Up Step-Up/Step-Down	1	TO-220-5 Formed Leads	-40 °C	125 ¯C	1.81 mOhm	4 V
Texas Instruments LM2587SX-5.0	100 kHz	Boost Flyback Forward Converter	TO-263 (DDPAK-5)	Positive	5 V	5 A	Surface Mount	Step-Up Step-Up/Step-Down	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	-40 °C	125 ¯C	1.81 mOhm	4 V
Texas Instruments LM2587SX-5.0/NOPB	100 kHz	Boost Flyback Forward Converter	TO-263 (DDPAK-5)	Positive	5 V	5 A	Surface Mount	Step-Up Step-Up/Step-Down	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	-40 °C	125 ¯C	1.81 mOhm	4 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	135	$ 8.89
Texas Instruments	TUBE	1	$ 9.10
		100	$ 7.42
		250	$ 5.83
		1000	$ 4.95

Description

General part information

LM2587 Series

The LM2587 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3 V, 5 V, 12 V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with these switching regulators.

The power switch is a 5-A NPN device that can stand-off 65 V. Protecting the power switch are current and thermal limiting circuits, and an undervoltage lockout circuit. This IC contains a 100 kHz fixed-frequency internal oscillator that permits the use of small magnetics. Other features include soft-start mode to reduce in-rush current during start up, current mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. An output voltage tolerance of ±4%, within specified input voltages and output load conditions, is ensured for the power supply system.

Documents

Technical documentation and resources

LM2587T-3.3/NOPB

Deep-Dive with AI

LM2587T-3.3/NOPB

Deep-Dive with AI

Technical Specifications

LM2587 Series

Pricing

Description

LM2587 Series

Documents

Negative Input to Positive Output made SIMPLE

Basic Calculation of a Boost Converter's Power Stage (Rev. D)

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

AN-1082 Adjust or Synchronize LM2586/88 Switching Frequency (Rev. B)

Working With Boost Converters

LM2587 4-V To 40-V, 5-A Step-Up Wide VIN Flyback Regulator datasheet (Rev. E)

Power Management Guide 2018 (Rev. R)

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

Inverted SEPIC Made SIMPLE

Input and Output Capacitor Selection

스트컨버터의 전력계 기본 계산 (Rev. D)

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

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

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

Dual LM2587 Boost Converter, -5V input to +5V, 2A Output

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

Semiconductor and IC Package Thermal Metrics (Rev. D)

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

Softstart Using Constant Current Constant Voltage Approach

AN-1095 Design of Isolated Converters Using Simple Switchers (Rev. B)

Increasing Available Load Power in an LM2587 Boost Regulator (by Paralleling)

Understanding Boost Power Stages In Switchmode Power Supplies

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

LM2587 Series