Product Summary

The LM2576-5.0 is a 52 kHz simple 3A buck voltage regulator. The LM2576-5.0 provides all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3V, 5V, or 12V fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 3A load with excellent line and load regulation. The applications of the LM2576-5.0 include Simple high-efficiency step-down (buck) regulator, Efficient pre-regulator for linear regulators, On-card switching regulators, Positive to negative converter (inverting Buck-Boost), Isolated Flyback Converter using minimum number of external components, Negative Boost Converter.

Parametrics

LM2576-5.0 absolute maximum ratings: (1)Maximum Supply Voltage: 45V; (2)ON/OFF Pin Input Voltage: –0.3V≤V≤ +40V; (3)Output Voltage to Ground (Steady State): –1V; (4)Power Dissipation: Internally Limited; (5)Storage Temperature Range: –65℃ to +150℃; (6)Minimum ESD Rating C = 100pF, R = 1.5kW: 2 kV; (7) FB Pin: 1kV; (8) Lead Temperature (soldering, 10 sec.): 260℃; (9) Maximum Junction Temperature: 150℃.

Features

LM2576-5.0 features: (1)3.3V, 5V, 12V, and adjustable output versions; (2) Voltage over specified line and load conditions: Fixed version: ±3% max. Output voltage, Adjustable version: ±2% max. feedback voltage; (3)Guaranteed 3A output current; (4)Wide input voltage range: 4V to 40V; (5)Wide output voltage range: 1.23V to 37V; (6)Requires only 4 external components; (7)52kHz fixed frequency internal oscillator; (8)Low power standby mode IQ typically<200mA; (9)80% efficiency (adjustable version typically>80%); (10)Uses readily available standard inductors; (11) Thermal shutdown and current limit protection; (12)100% electrical thermal limit burn-in.

Diagrams

LM2576-5.0 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM2576-5.0BT
LM2576-5.0BT


IC REG BUCK 5V 3A TO220-5

Data Sheet

Negotiable 
LM2576-5.0BU
LM2576-5.0BU


IC REG BUCK 5V 3A TO263-5

Data Sheet

Negotiable 
LM2576-5.0BU TR
LM2576-5.0BU TR


IC REG BUCK 5V 3A TO263-5

Data Sheet

Negotiable 
LM2576-5.0WT
LM2576-5.0WT


IC REG BUCK 5V 3A TO220-5

Data Sheet

0-1: $1.84
1-25: $1.47
25-100: $1.14
100-250: $1.09
250-500: $1.06
LM2576-5.0WU TR
LM2576-5.0WU TR


IC REG BUCK 5V 3A TO263-5

Data Sheet

0-750: $1.12
LM2576-5.0WU
LM2576-5.0WU


IC REG BUCK 5V 3A TO263-5

Data Sheet

0-1: $1.93
1-25: $1.54
25-100: $1.20
100-250: $1.14
250-500: $1.12