LM2576HV Datasheet | Texas Instruments

Features - Newer products available: - LMR51430 4.5 to 36-V, 3-A, 500-k Hz and 1.1MHz synchronous converter - LM76003 3.5 to 60-V, 3.5-A, 300-k Hz to 2.2MHz synchronous converter - For faster time to market: - TLVM13630 3 to 36-V, 3-A, 200-k Hz to 2.2-MHz power module - 3.3-V, 5-V, 12-V, 15-V, and adjustable output versions - Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions - Specified 3-A output current - Wide input voltage range: 40 V Up to 60 V for HV version - Requires only four external ponents - 52-k Hz fixed-frequency internal oscillator - TTL-shutdown capability, low-power standby mode - High efficiency - Uses readily available standard inductors - Create a custom design using the LMR33630 or LM76003 with the WEBENCH® Power Designer 2 Applications - Motor drives - Merchant network and server PSU - Appliances - Test and measurement equipment 3 Description The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 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, 15 V, and an adjustable output version. Requiring a minimum number of external ponents, these regulators are simple to use and include fault protection and a fixed-frequency oscillator. The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required. A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included,...