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LM2590HV-AQ Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM2590HV-AQ Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 22 page  LM2590HV-AQ SIMPLE SWITCHER®Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features General Description The LM2590HV-AQ regulator is a monolithic integrated cir- cuit which provides all the active functions for a step-down (buck) switching regulator, and is capable of driving a 1 Amp load with excellent line and load regulation. The LM2590HV-AQ is available in fixed output voltages of 3.3V, 5.0V, as well as an adjustable output version. The LM2590HV-AQ switching regulator is similar to the LM2591HV with additional supervisory and performance fea- tures. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation†, improved line and load specifications, fixed- frequency oscillator, Shutdown/Soft-start, output error flag and flag delay. The LM2590HV-AQ operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regu- lators. Available in a standard 7-lead TO-220 package with several different lead bend options, and a 7-lead TO-263 Surface mount package. Other features include a guaranteed ±4% tolerance on out- put voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. Ex- ternal shutdown is included, featuring typically 90 µA standby current. Self protection features include a two stage current limit for the output switch and an over temperature shutdown for complete protection under fault conditions. Features n Reliability Qualification for Automotive n 3.3V, 5V, and adjustable output versions n Adjustable version output voltage range, 1.2V to 57V ±4% max over line and load conditions n Guaranteed 1A output load current n Available in 7-pin TO-220 and TO-263 (surface mount) Package n Input voltage range up to 60V n 150 kHz fixed frequency internal oscillator n Shutdown/Soft-start n Out of regulation error flag n Error flag delay n Low power standby mode, I Q typically 90 µA n High Efficiency n Thermal shutdown and current limit protection Applications n Simple high-efficiency step-down (buck) regulator n Efficient pre-regulator for linear regulators n On-card switching regulators n Positive to Negative converter Note: † Patent Number 5,382,918. Typical Application (Fixed Output Voltage Versions) 20097101 SIMPLE SWITCHER® and Switchers Made Simple® are registered trademarks of National Semiconductor Corporation. May 2004 © 2004 National Semiconductor Corporation DS200971 www.national.com |
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