The LM2592HV series is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 2A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, and an adjustable output version. This series of switching regulators is similar to the LM2593HV, but without some of the supervisory and performance 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 LM2592HV operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. It is available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 Surface mount package. Other features include a guaranteed ±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.
The LM2592HV series are monolithic step‑down (buck) switching regulators that provide up to 2 A output current with excellent line and load regulation. They are offered in fixed 3.3 V, 5 V, and an adjustable version covering 1.2 V to 57 V output.
Key features include a 150 kHz fixed‑frequency internal oscillator, low‑power standby mode (≈90 µA), on/off control pin, and built‑in protection such as current limiting and thermal shutdown. The devices are supplied in 5‑lead TO‑220 and TO‑263 surface‑mount packages and are suitable for high‑efficiency power conversion applications.
| Input voltage range | up to 60 V |
|---|---|
| Switching frequency | 150 kHz (fixed) |
| Maximum output current | 2 A |
| Standby current | ≈90 µA |
| Package types | 5‑lead TO‑220 and TO‑263 (surface‑mount) |
| Adjustable output voltage range | 1.2 V to 57 V |
The maximum supply voltage (Vin) is 63 V.
The efficiency is 76 % for the 3.3 V version under those conditions.
It is offered in a standard 5‑lead TO‑220 package and a 5‑lead TO‑263 surface‑mount package.