|Package | Pins TO-263 (KTT) | 5|
|Operating temperature range (°C) -40 to 125|
|Package qty | Carrier 500 | LARGE T&R|
Features for the LM2591HV
- 3.3-V, 5-V, and Adjustable Output Versions
- Adjustable Version Output Voltage Range: 1.2 V
to 57 V ±4% Maximum Over Line and Load
- Specified 1-A Output Load Current
- Available in 5-Pin Package
- Input Voltage Range Up to 60 V
- 150-kHz Fixed Frequency Internal Oscillator
- ON and OFF Control
- Low Power Standby Mode, IQ Typically 90 µA
- High Efficiency
- Thermal Shutdown and Current-Limit Protection
Description for the LM2591HV
The LM2591HV 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, and an adjustable output version.
This series of switching regulators is similar to the LM2590HV, but without some of the supervisory and control features of the latter.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, and a fixed-frequency oscillator.
The LM2591HV 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-pin package with several different lead bend options, and a 5-pin surface mount package.
Other features include a specified ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External 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.