Product Summary

The LM2576 is a step-down voltage regulator, provides all the active functions for a step-down(buck) voltage regulator. This device features an out-put voltage which is asjustable from 1.23V to 37V and is capable of driving a 3A load with excellent line and load regulation. The applications of the LM2576 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 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 Disspation: internally limited; (5)Storage temperature range: -65℃ to +150℃.

Features

LM2576 features: (1)Adjustable output, reference ±2% max over line and load conditions; (2)Guaranteed 3A output current; (3)Wide input voltage range, 4V to 40V; (4)Wide output voltage range, 1.23V to 37V; (5)Requries only 4 external components; (6)52kHz fixed frequency inrernal oscailltor; (7)Low power standby mode, IQ typically <200μA; (8)Efficiency typically over 80%; (9)Uses readily available standard inductors; (10)Thermal shutdown and current limit protection; (11)100% electrical thermal limit burn-in.

Diagrams

LM2576 block diagram

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

Other


Data Sheet

Negotiable 
LM2576-12BT
LM2576-12BT


IC REG BUCK 12V 3A TO220-5

Data Sheet

Negotiable 
LM2576-12BU
LM2576-12BU


IC REG BUCK 12V 3A TO263-5

Data Sheet

Negotiable 
LM2576-12BU TR
LM2576-12BU TR


IC REG BUCK 12V 3A TO263-5

Data Sheet

Negotiable 
LM2576-12BU_1137490
LM2576-12BU_1137490

Other


Data Sheet

Negotiable 
LM2576-12WT
LM2576-12WT


IC REG BUCK 12V 3A TO220-5

Data Sheet

0-400: $1.09
LM2576-12WU
LM2576-12WU


IC REG BUCK 12V 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
LM2576-12WU TR
LM2576-12WU TR


IC REG BUCK 12V 3A TO263-5

Data Sheet

0-750: $1.12