LM2586 Series

4-V to 40-V, 3-A step-up wide VIN flyback regulator with frequency synchronization

Catalog

4-V to 40-V, 3-A step-up wide VIN flyback regulator with frequency synchronization

Part	Voltage - Input (Min) [Min]	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Mounting Type	Voltage - Output (Max) [Max]	Voltage - Output (Min/Fixed)	Output Type	Function	Current - Output	Number of Outputs	Topology	Supplier Device Package	Output Type
Texas Instruments LM2586T-ADJ/NOPB	4 V	Positive	-40 °C	125 ¯C	TO-220-7 Formed Leads	Through Hole	60 V	1.23 V	Adjustable	Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-220-7
Texas Instruments LM2586SX-12	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount		12 V		Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)	1.81 mOhm
Texas Instruments LM2586T-3.3	4 V	Positive	-40 °C	125 ¯C	TO-220-7 Formed Leads	Through Hole		3.3 V		Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-220-7	1.81 mOhm
Texas Instruments LM2586SX-ADJ	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount	60 V	1.23 V	Adjustable	Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)
Texas Instruments LM2586SX-3.3	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount		3.3 V		Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)	1.81 mOhm
Texas Instruments LM2586S-12/NOPB	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount		12 V		Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)	1.81 mOhm
Texas Instruments LM2586T-ADJ	4 V	Positive	-40 °C	125 ¯C	TO-220-7 Formed Leads	Through Hole	60 V	1.23 V	Adjustable	Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-220-7
Texas Instruments LM2586S-3.3	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount		3.3 V		Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)	1.81 mOhm
Texas Instruments LM2586S-ADJ	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount	60 V	1.23 V	Adjustable	Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)
Texas Instruments LM2586SX-5.0	4 V	Positive	-40 °C	125 ¯C	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Surface Mount		5 V		Step-Up Step-Up/Step-Down	3 A	1	Boost Flyback Forward Converter	TO-263 (DDPAK-7)	1.81 mOhm

Catalog

4-V to 40-V, 3-A step-up wide VIN flyback regulator with frequency synchronization

Key Features

• Requires Few External ComponentsFamily of Standard Inductors and TransformersNPN Output Switches 3 A, Can Stand Off 65 VWide Input Voltage Range: 4 V to 40 VAdjustable Switching Frequency: 100 kHz to 200 kHzExternal Shutdown CapabilityDraws Less Than 60 µA When Shut DownFrequency SynchronizationCurrent-mode Operation for Improved Transient Response, Line Regulation, and Current LimitInternal Soft-start Function Reduces In-rush Current During Start-upOutput Transistor Protected by Current Limit, Undervoltage Lockout, and Thermal ShutdownSystem Output Voltage Tolerance of ±4% Maximum Over Line and Load ConditionsCreate a Custom Design Using the LM2586 With theWEBENCH®Power DesignerRequires Few External ComponentsFamily of Standard Inductors and TransformersNPN Output Switches 3 A, Can Stand Off 65 VWide Input Voltage Range: 4 V to 40 VAdjustable Switching Frequency: 100 kHz to 200 kHzExternal Shutdown CapabilityDraws Less Than 60 µA When Shut DownFrequency SynchronizationCurrent-mode Operation for Improved Transient Response, Line Regulation, and Current LimitInternal Soft-start Function Reduces In-rush Current During Start-upOutput Transistor Protected by Current Limit, Undervoltage Lockout, and Thermal ShutdownSystem Output Voltage Tolerance of ±4% Maximum Over Line and Load ConditionsCreate a Custom Design Using the LM2586 With theWEBENCH®Power Designer

Description

The LM2586 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 3-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 an adjustable frequency oscillator that can be programmed up to 200 kHz. The oscillator can also be synchronized with other devices, so that multiple devices can operate at the same switching frequency. Other features include soft start mode to reduce in-rush current during start up, and current mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. The device also has a shutdown pin, so that it can be turned off externally. An output voltage tolerance of ±4%, within specified input voltages and output load conditions, is ensured for the power supply system. The LM2586 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 3-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 an adjustable frequency oscillator that can be programmed up to 200 kHz. The oscillator can also be synchronized with other devices, so that multiple devices can operate at the same switching frequency. Other features include soft start mode to reduce in-rush current during start up, and current mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. The device also has a shutdown pin, so that it can be turned off externally. An output voltage tolerance of ±4%, within specified input voltages and output load conditions, is ensured for the power supply system.