The LM2576T-ADJ is a monolithic integrated switch-mode step-down (buck) voltage regulator, designed for easy implementation in power supply designs. Capable of delivering up to 3A output current, it offers excellent line and load regulation with fixed output options (3.3V, 5V, 12V, 15V) and an adjustable version ranging from 1.23V to 37V.
With a 52 kHz internal oscillator, in-built thermal shutdown, cycle-by-cycle current limiting, and high efficiency, this regulator significantly reduces heat dissipation—often eliminating the need for bulky heatsinks. It simplifies power design with minimal external components and supports a variety of standard inductors from popular manufacturers.
Switch-Mode Step-Down Voltage Regulator
Fixed Output Voltages: 3.3V, 5V, 12V, 15V
Adjustable Output Voltage Range: 1.23V to 37V
Output Current: Up to 3A
Maximum Input Voltage: 40V
Internal Oscillator Frequency: 52 kHz (Fixed)
Thermal Shutdown & Current Limit Protection
Cycle-by-Cycle Current Limiting
±4% Tolerance on Output Voltage
External Shutdown Pin with 80μA Standby Current
Available in TO-220 Package
| Parameter | Value |
|---|---|
| Output Voltage (Fixed) | 3.3V / 5V / 12V / 15V |
| Output Voltage (Adjustable) | 1.23V to 37V |
| Output Current | Up to 3A |
| Max Input Voltage | 40V |
| Oscillator Frequency | 52 kHz (±10%) |
| Shutdown Current | 80μA (typical) |
| Package | TO-220 |
| Protections | Thermal Shutdown, Current Limiting |
| Efficiency | High (Switch-Mode Design) |
DC-DC Converters
Battery Chargers
Distributed Power Supplies
Embedded Systems
Industrial & Consumer Electronics
Product specifications, features, and design may change over time due to product updates or improvements.
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