LM2596 Series

SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator

Catalog

SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator

Part	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Number of Outputs	Package / Case	Mounting Type	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Output Configuration	Function	Output Type	Current - Output	Voltage - Output (Max)	Output Type
Texas Instruments LM2596T-5.0/LF03	4.5 V	5 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596SX-5.0/NOPB	4.5 V	5 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596SX-3.3/NOPB	4.5 V	3.3 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596T-12/LF03	4.5 V	12 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596T-3.3	4.5 V	3.3 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596T-3.3/LF03	4.5 V	3.3 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A
Texas Instruments LM2596SX-ADJ/NOPB	4.5 V	1.2 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down		3 A	37 V	Adjustable
Texas Instruments LM2596T-ADJ/LB05	4.5 V	1.2 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down		3 A	37 V	Adjustable
Texas Instruments LM2596S-ADJ/NOPB	4.5 V	1.2 V	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Surface Mount	Buck	-40 °C	125 ¯C	TO-263 (DDPAK-5)	Positive	Step-Down		3 A	37 V	Adjustable
Texas Instruments LM2596T-3.3/NOPB	4.5 V	3.3 V	1	TO-220-5 Formed Leads	Through Hole	Buck	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	3 A

Catalog

SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator

Key Features

• New product available:LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converterFor faster time to market:TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module3.3-V, 5-V, 12-V, and adjustable output versionsAdjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditionsAvailable in TO-220 and TO-263 packages3-A output load currentInput voltage range up to 40 VRequires only four external componentsExcellent line and load regulation specifications150-kHz fixed-frequency internal oscillatorTTL shutdown capabilityLow power standby mode, I Q, typically 80 µAHigh efficiencyUses readily available standard inductorsThermal shutdown and current-limit protectionCreate a custom design using the LM2596 with theWEBENCH Power DesignerNew product available:LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converterFor faster time to market:TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module3.3-V, 5-V, 12-V, and adjustable output versionsAdjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditionsAvailable in TO-220 and TO-263 packages3-A output load currentInput voltage range up to 40 VRequires only four external componentsExcellent line and load regulation specifications150-kHz fixed-frequency internal oscillatorTTL shutdown capabilityLow power standby mode, I Q, typically 80 µAHigh efficiencyUses readily available standard inductorsThermal shutdown and current-limit protectionCreate a custom design using the LM2596 with theWEBENCH Power Designer

Description

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-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. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator. The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what can be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package. A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies. Other features include a ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 µA standby current. Self-protection features include a two stage frequency reducing current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions. The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-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. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator. The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what can be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package. A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies. Other features include a ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 µA standby current. Self-protection features include a two stage frequency reducing current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.