Product Summary

The LM2576SX-ADJ is a 3A Step-Down Voltage Regulator. It is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. The LM2576SX-ADJ is available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. The applications of the LM2576SX-ADJ include Simple high-efficiency step-down (buck) regulator, Efficient pre-regulator for linear regulators, On-card switching regulators and Positive to negative converter (Buck-Boost).


LM2576SX-ADJ absolute maximum ratings: (1)Maximum Supply Voltage: 45V; (2)ON /OFF Pin Input Voltage: -0.3V ≤ V ≤ +VIN; (3)Output Voltage to Ground (Steady State): -1V; (4)Power Dissipation: Internally Limited; (5)Storage Temperature Range: -65 to +150℃; (6)Maximum Junction Temperature: 150℃; (7)Minimum ESD Rating (C = 100 pF, R = 1.5 kΩ): 2kV; (8)Lead Temperature (Soldering, 10 Seconds): 260℃.


LM2576SX-ADJ features: (1)3.3V, 5V, 12V, 15V, and adjustable output versions; (2)Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±4% max over line and load conditions; (3)Guaranteed 3A output current; (4)Wide input voltage range, 40V up to 60V for HV version; (5)Requires only 4 external components; (6)52 kHz fixed frequency internal oscillator; (7)TTL shutdown capability, low power standby mode; (8)High efficiency; (9)Uses readily available standard inductors; (10)Thermal shutdown and current limit protection; (11)P+ Product Enhancement tested.


LM2576SX-ADJ block diagram

Image Part No Mfg Description Data Sheet Download Pricing

National Semiconductor (TI)

Switching Converters, Regulators & Controllers

Data Sheet

0-500: $1.06
500-1000: $0.85
1000-2500: $0.80
2500-5000: $0.77

National Semiconductor (TI)

Switching Converters, Regulators & Controllers 3A STEP-DOWN VLTG REG

Data Sheet

0-1: $2.06
1-25: $1.66
25-100: $1.51
100-250: $1.36
250-500: $1.00