LM2576-3.3WT More Semiconductors - ICs by Microchip Technology
3A Step-Down SMPS Regulator
| Status: | Active |
|---|---|
| Series: | LM2576 |
| RoHS: | Compliant |
The LM2576 series of monolithic integrated circuits provide 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.
These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator.
The LM2576 series offers a high efficiency replacement for popular three-terminal adjustable linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.
A standard series of inductors available from several different manufacturers are ideal for use with the LM2576 series. This feature greatly simplifies the design of switch-mode power supplies.
The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified input voltages and output load conditions. The oscillator frequency is guaranteed to±10%. External shutdown is included, featuring less than 200µA standby current. The output switch includes cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.
Features
| 3.3V, 5V, 12V, and adjustable output versions |
| Voltage over specified line and load conditions: |
| Fixed version: ±3% max. output voltage |
| Adjustable version: ±2% max. feedback voltage |
| Guaranteed 3A output current |
| Wide input voltage range: 4V to 40V |
| Wide output voltage range: 1.23V to 37V |
| Requires only 4 external components |
| 52kHz fixed frequency internal oscillator |
| Low power standby mode IQ typically < 200µA |
| 80% efficiency (adjustable version typically > 80%) |
| Uses readily available standard inductors |
| Thermal shutdown and current limit protection |
| 100% electrical thermal limit burn-in |
Specifications
| Regulator Type | Step Down (Buck) |
|---|---|
| pricing | 0 |
| Supported Output | 0 |
| Minimum Input Voltage (V) | 0 |
| Maximum Input Voltage (V) | 40 |
| Output Current (mA) Max | 0 |
| Maximum Frequency (kHz) | 0 |
| Vref (V) | 0 |
| Duty Cycle Min (%) | 0 |
| Duty Cycle Max (%) | 0.98 |
| Switching Frequency (kHz) | 52 |
| Input Voltage Range Min | 4 |
| Input Voltage Range Max | 40 |
| Output Current | 3000 |
| Temp Range Min | -40 |
| Temp Range Max | 125 |
| Vout Min (V) | 1.23 |
| Quiescent Current (mA) typ | 30 |
| Light Load Efficiency Mode | No |
| Switch current (A) typ | 0 |
| Automotive Rated | No |
| SHUTDOWN Current (µA) (Typ) | 50 |
| # of Outputs | 1 |
| Vfb (V) | 1.23 |
| Synchronous Rectifier | No |
| Pins | Packaging | 5 | TO-220 |
| Temp Range | -40C to +85C |
| Packing Media | Tube (50) |
Environmental Information
| JEDEC Indicator | e3 |
|---|---|
| ROHS | Compliant |
| China EFUP | Compliant |
| Device Weight (g) | 1.9839 |
| Shipping Weight (kg) | 3.12 |
| Lead Count | 5 |
| Package Type | TO-220 |
| Soldering Composition | Matte Tin |
Alternative Descriptions
| Dc/Dc Conv, Buck, 0.5A, 52Khz, 85Deg C Rohs Compliant: Yes |Microchip LM2576-3.3WT | Newark Electronics |
| LM2576 Series 40 V 52 kHz 3 A Simple Step-Down Buck Regulator - TO-220-5 | Future Electronics |
| 3A STEP-DOWN SMPS REGULATOR | Avnet America |
| DC/DC CONV, BUCK, 0.5A, 52KHZ, 85DEG C | element14 |
Frequently Asked Questions
Where can I find additional details, specifications and documents for a LM2576-3.3WT?
Additional datasheets, footprints and schematics for LM2576-3.3WT are listed on our Part Details page. You can also find images and similar parts to LM2576-3.3WT on this page.
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What category does LM2576-3.3WT fall under?
The LM2576-3.3WT is listed under Semiconductors - ICs > More Semiconductors - ICs.
Can I view similar or alternative parts?
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Is the LM2576-3.3WT RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by Microchip Technology.
Which authorised distributors for LM2576-3.3WT have stock available?
Authorised distributors including Newark Electronics, Future Electronics, Avnet America, Microchip Technology and element14 have stock available or on a lead time for LM2576-3.3WT.
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