| Part Number(s) (NSID) |
Top View | Type | Pins | MSL Rating | Peak Reflow | RoHS Status |
CAD Symbols | Models | Package Marking Format |
|---|---|---|---|---|---|---|---|---|---|
| LM2596S-12/NOPB LM2596S-12 |
 |
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -12 P+ |
| LM2596S-3.3/NOPB LM2596S-3.3 |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -3.3 P+ |
| LM2596S-5.0/NOPB LM2596S-5.0 |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -5.0 P+ |
| LM2596S-ADJ/NOPB LM2596S-ADJ |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -ADJ P+ |
| LM2596SX-12/NOPB LM2596SX-12 |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -12 P+ |
| LM2596SX-3.3/NOPB LM2596SX-3.3 |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -3.3 P+ |
| LM2596SX-5.0/NOPB LM2596SX-5.0 |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -5.0 P+ |
| LM2596SX-ADJ/NOPB LM2596SX-ADJ |
|
TO-263 | 5 | 3 3 |
245 235 |
Detail | Download | N/A |
NSUZXYTTE# LM2596S -ADJ P+ |
| LM2596T-12/NOPB LM2596T-12 |
 |
TO-220 | 5 | 1 1 |
NA NA |
Detail | Download | N/A |
NSUZXYTTE# LM2596T -12 P+ |
| LM2596T-3.3/NOPB LM2596T-3.3 |
|
TO-220 | 5 | 1 1 |
NA NA |
Detail | Download | N/A |
NSUZXYTTE# LM2596T -3.3 P+ |
| LM2596T-5.0/NOPB LM2596T-5.0 |
|
TO-220 | 5 | 1 1 |
NA NA |
Detail | Download | N/A |
NSUZXYTTE# LM2596T -5.0 P+ |
| LM2596T-ADJ/NOPB LM2596T-ADJ |
|
TO-220 | 5 | 1 1 |
NA NA |
Detail | Download | N/A |
NSUZXYTTE# LM2596T -ADJ P+ |
PDF
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 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 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 would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead 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 guaranteed ±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 over temperature shutdown for complete protection under fault conditions.
| • | Simple high-efficiency step-down (buck) regulator |
| • | On-card switching regulators |
| • | Positive to negative converter |
| • | 3.3V, 5V, 12V, and adjustable output versions |
| • | Adjustable version output voltage range, 1.2V to 37V ±4% max over line and load conditions |
| • | Available in TO-220 and TO-263 packages |
| • | Guaranteed 3A output load current |
| • | Input voltage range up to 40V |
| • | Requires only 4 external components |
| • | Excellent line and load regulation specifications |
| • | 150 kHz fixed frequency internal oscillator |
| • | TTL shutdown capability |
| • | Low power standby mode, IQ typically 80 µA |
| • | High efficiency |
| • | Uses readily available standard inductors |
| • | Thermal shutdown and current limit protection |
Diagrams
Typical Application
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Block Diagram
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Typical Performance  |
