- Available in 3.3V, 5V, 12V, 15V, and adjustable output versions
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Adjustable version of the output voltage range,
1.23V to 37V (57V for HV version) ± 4% or less
Line and load conditions
- Guaranteed 1A output current
- High voltage 60V version with wide input voltage range up to 40V
- Only 4 external components are required
- Internal oscillator at fixed frequency at 52 kHz
- TTL shutdown capability, low-power standby mode
- High efficiency
- Utilizes off-the-shelf standard inductors
- Thermal shutdown and current limit protection
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illustrate
This series of voltage regulators, LM2575 monolithic integrated circuits, provides all buck-active functions (buck) switching regulators, driving an excellent line and load regulation with 1A load capability. These devices are available in fixed output voltages of 3.3V and 5V and 12V, 15V, and adjustable output versions.
Requiring a minimum number of external components, these regulators are simple to use, with built-in frequency compensation and fixed-frequency oscillators.
The LM2575 series offers a popular high-efficiency alternative to three-terminal linear regulators. It greatly reduces the size of the heatsink, and in many cases, the absence of a heatsink is necessary.
Future standards for the LM2575 inductor series optimized for use can be obtained from several different manufacturers. This feature greatly simplifies the design of switching power supplies.
Other features include ± guaranteed 4% tolerance of voltage and ± 10% oscillator frequency under specified output input voltage and output load conditions. External shutdown is included with 50μA (typical) standby current. The output switch includes cycle-by-cycle current limit and adequate protection against thermal shutdown during fault conditions.
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