Product Summary

The LM2576S-3.3 is a 3A Step-Down Voltage Regulator. It provides all the active functions for a step-down(buck) switching regulator, capable of driving 3A load with excellent line and load regulation. The LM2576S-3.3 is available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. The applications of the LM2576S-3.3 are Simple high-efficiency step-down (buck) regulator, Efficient pre-regulator for linear regulators, On-card switching regulators, Positive to negative converter (Buck-Boost).

Parametrics

LM2576S-3.3 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℃.

Features

LM2576S-3.3 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.

Diagrams

LM2576S-3.3 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM2576S-3.3
LM2576S-3.3
National Semiconductor (TI)
Switching Converters, Regulators & Controllers
Data Sheet
0-315: $1.21
315-540: $1.06
540-1035: $0.85
1035-2520: $0.80
LM2576S-3.3/NOPB
LM2576S-3.3/NOPB
National Semiconductor (TI)
Switching Converters, Regulators & Controllers 3A STEP-DOWN VLTG REG
Data Sheet
0-1: $1.70
1-25: $1.36
25-100: $1.24
100-250: $1.12