深圳市中立信电子科技有限公司

1 Features

1• 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

Conditions

• 2-A Output Load Current

• Available in 5-Pin Package

• Input Voltage Range up to 60V

• 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

2 Applications

• Simple High-Efficiency Step-Down (Buck)

Regulators

• Efficient Preregulator for Linear Regulators

• On-Card Switching Regulators

• Positive-to-Negative Converters

3 Description The LM2592HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 2-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 LM2593HV, 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 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. Available in a standard 5-pin package with several different lead bend options, and a 5-pin surface mount package.