LM2598 Datasheet | Texas Instruments

Features 1 Features - 1 3.3-V, 5-V, 12-V, and Adjustable Output Versions - Adjustable Version Output Voltage Range, 1.2-V to 37-V ±4% Max Over Line and Load Conditions - 1-A Output Current - Available in 7-Pin TO-220 and DDPAK (Surface Mount) Package - Input Voltage Range Up to 40 V - Excellent Line and Load Regulation Specifications - 150 k Hz Fixed Frequency Internal Oscillator - Shutdown/Soft-start - Out of Regulation Error Flag - Error Output Delay - Low Power Standby Mode, IQ, Typically 85 μA - High Efficiency - Uses Readily Available Standard Inductors - Thermal Shutdown and Current Limit Protection 2 Applications - Simple High-Efficiency Step-down (Buck) Regulator - Efficient Preregulator for Linear Regulators - On-Card Switching Regulators - Positive to Negative Converter 3 Description The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-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. The LM2598 is a member of the LM259x family. Requiring a minimum number of external ponents, these regulators are simple to use and include internal frequency pensation, improved line and load specifications, fixed-frequency oscillator, Shutdown/Soft-start, error flag delay and error flag output. The LM2598 series operates at a switching frequency of 150 k Hz, thus allowing smaller sized filter ponents than what would be required with lowerfrequency switching regulators. Available in a standard 7-lead TO-220 package with several different lead bend options, and a 7-lead DDPAK surface mount package. Typically, for output voltages less than 12 V, and ambient temperatures less than 50°C, no heat sink is required. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) TO-220 (7) TO-263 (7) 14.986 mm × 10.16 mm 10.10 mm × 8.89 mm (1) For all...