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

US ECCN: EAR99 US/Local Export Classification Number

NEW - Custom reel may be available
Inventory: 43,365  

Quality information

RoHS Exempt
REACH Affected
Lead finish / Ball material SN
MSL rating / Peak reflow Level-3-245C-168 HR
Quality, reliability
& packaging information

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
TO-263 (KTT) | 5 500 | LARGE T&R
Custom reel may be available
-40 to 125
Package | Pins TO-263 (KTT) | 5
Package qty | Carrier: 500 | LARGE T&R
Custom reel may be available
Operating temperature range (°C) -40 to 125
View TI packaging information

Features for the LM2596

  • New product available: LMR33630 36-V, 3-A, 400-kHz synchronous converter
  • 3.3-V, 5-V, 12-V, and adjustable output versions
  • Adjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditions
  • Available in TO-220 and TO-263 packages
  • 3-A output load current
  • Input voltage range up to 40 V
  • Requires only four 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
  • Create a custom design using the LM2596 with the WEBENCH Power Designer

All trademarks are the property of their respective owners.

Description for the LM2596

The LM2596 series of regulators are monolithic integrated circuits that provide all theactive functions for a step-down (buck) switching regulator, capable of driving a 3-A load withexcellent 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 andinclude internal frequency compensation, and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smallersized filter components than what would 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-pinTO-263 surface mount package.

The new product,LMR33630,offers reduced BOM cost, higher efficiency, and an 85% reduction in solution size among many otherfeatures. See thedevicecomparison table to compare specs.StartWEBENCH Design with LMR33630.

A standard series of inductors are available from several different manufacturersoptimized for use with the LM2596 series. This feature greatly simplifies the design of switch-modepower supplies.

Other features include a ±4% tolerance on output voltage under specified input voltageand 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 frequencyreducing current limit for the output switch and an overtemperature shutdown for completeprotection under fault conditions.


Qty Price (USD)
1-99 3.636
100-249 3.186
250-999 2.234
1,000+ 1.8

Additional package qty | carrier options

Package qty | Carrier 45 | TUBE
Inventory 9,259
Qty | Price (USD) 1ku | 2.16 1-99 3.974 100-249 3.24 250-999 2.547 1,000+ 2.16