Texas Instruments LM2574x SIMPLE SWITCHER® Voltage Regulators
Texas Instruments LM2574x SIMPLE SWITCHER® Voltage Regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator. These regulators can drive a 0.5A load with excellent line and load regulation. The LM2574x devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. The Texas Instruments LM2574x voltage regulators offer a high-efficiency replacement for popular three-terminal linear regulators. These voltage regulators feature high-efficiency TTL shutdown capability and dramatically simplify switch-mode power supply design.
Features
- 3.3V, 5V, 12V, 15V, and adjustable output versions
- Adjustable version output voltage range from 1.23V to 37V (57V for HV Version) ±4% max over-line and -load conditions
- Guaranteed 0.5A output current
- Wide input voltage range of 40V and up to 60V for HV version
- Requires only four external components
- 52kHz fixed frequency internal oscillator
- TTL shutdown capability and low-power standby mode
- High-efficiency
- Uses readily available standard inductors
- Thermal shutdown and current limit protection
Applications
- Simple high-efficiency step-down (buck) regulator
- Efficient pre-regulator for linear regulators
- On-card switching regulators
- Positive to negative converter (buck-boost)
Application Circuit
Related Products
Texas Instruments LM257x SIMPLE SWITCHER® Voltage Regulators
High-efficiency step-down regulators ranging from 0.5A to 3.0A output current.
Publicado: 2019-07-18
| Actualizado: 2023-09-29