LM2596T-12

The LM2596T-12 belongs to 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 and this 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. External shutdown is included, featuring typically 80 A 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. 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. 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.

The features of LM2596T-12 can be summarized as (1)3.3V, 5V, 12V, and adjustable output versions; (2)adjustable versiooutput voltage range, 1.2V to 37V ±4% max over line and load conditions; (3)available iTO-220 and TO-263 packages; (4)guaranteed 3A output load current; (5)input voltage range up to 40V; (6)requires only 4 external components; (7)excellent line and load regulatiospecifications; (8)150 kHz fixed frequency internal oscillator; (9)TTL shutdowcapability; (10)low power standby mode, I Q typically 80 A; (11)high efficiency; (12)uses readily available standard inductors; (13)thermal shutdowand current limit protection.

The absolute maximum ratings of LM2596T-12 are (1)maximum supply voltage: 45V; (2)ON /OFF Pin input voltage: -0.3 V +25V; (3)feedback pin voltage: -0.3 V +25V; (4)output voltage to ground (Steady State): -1V; (5)power dissipation: internally limited; (6)storage temperature range: -65°C to +150°C; (7)ESD susceptibility human body model (Note 2): 2 kV; (8)lead temperature S Package Vapor Phase (60 sec.) +215°C, Infrared (10 sec.) +245°C; (9)T package (soldering, 10 sec.): +260°C; (10)maximum junction temperature: +150°C.