 LM2576HVS-5.0NOPB device package |
 LM2576HVS5.0NOPB schematic symbol |
PWM DC-DC step-down (buck) converter ICs are an integral part of modern switch mode power supplies, power electronic circuits, and consumer electronic devices. There are a large number of electronic and power electronic circuits which require step-down (buck) or step-up (boost) DC-DC conversion. These DC-DC converters are widely used in laptops, set top boxes, TV sets, power supplies and on-card regulation applications. The higher switching frequencies of these converters ensure efficient power conversion and minimum switching losses. These DC-DC converter ICs provide variable and stable voltage/current to the loads.
What is LM2576HVS5.0/NOPB？
The LM2576HVS5.0/NOPB is a monolithic integrated circuit which implements a step-down switching regulator using a built-in buck converter. This buck switching regulator IC is manufactured by Texas Instruments. This device is capable of driving loads at 3A continuous current with excellent line and load regulation. These regulator ICs are available in fixed as well as adjustable versions. These regulators are very easy to use and require minimal number of external components. The LM2576HVS5.0/NOPB provides an efficient alternative to the 3-terminal regulators. The major advantage of LM2576HVS5.0/NOPB is that it significantly reduces the size of heat sink and does not even require a heat sink in many cases. Other standard features of this regulator include thermal shutdown and current limiters.
Pin Configuration
The pin configuration of the LM2576HVS5.0/NOPB DC-DC buck regulator is given in the table below:
| Pin number | Pin name | Pin description |
| 1 | VIN | Input supply voltage |
| 2 | OUTPUT | Emitter pin of power transistors |
| 3 | GND | Ground pin |
| 4 | FEEDBACK | Feedback pin |
| 5 | ON/OFF | Active low enable pin |
| 6 | TAB | Connected to ground |
Features
- 5V stable output
- 3A output current
- Input voltage up to 60V
- Requires only 4 external components
- 52kHz fixed frequency internal oscillator
- TTL shutdown feature
- Low power standby mode
- Thermal shutdown and current limiter
- Customized design with WEBENCH tools
- High efficiency and performance
- DDPAK/TO-263 package
Applications
The applications of LM2576HVS5.0/NOPB step-down DC-DC converter are provided as following:
- Step-down or buck converter in switching power supplies
- Efficient pre-regulation for linear regulators
- On-card switching regulation applications
- Positive to negative buck-boost converter
- Buck conversion in consumer electronic circuits
Specifications
The major technical specifications of the LM2576HVS5.0/NOPB are provided as following:
- Terminals: 5
- Package: DDPAK/TO-263
- Input voltage range: Up to 63V
- Output voltage: 5V
- Max output current: 3A
- Switching frequency: 52kHz
- Efficiency: 77%
- Max junction temperature: 150 degrees
- Software support: WEBENCH design tools
How LM2576HVS5.0/NOPB work?
The LM2576HVS5.0/NOPB is a fixed voltage buck regulator which provides a stable 5V at its output. The regulator is capable of providing 3A continuous DC voltage to the load. The regulator also houses a built-in power transistor and fixed frequency internal oscillator. This regulator IC is widely used in switch mode power supplies, pre-regulation applications, and on-card regulation. The device needs minimum number of external components and is quite easy to use. The typical application circuit of LM2576HVS5.0/NOPB is shown in the figure below:
LM2576HVS5.0NOPB application circuit
LM2576HVS5.0/NOPB Related Products Prices
LM2576HVS-5.0/NOPB
Parts Mfr. Description Stock Prices Buy Now
Texas Instruments IC REG BUCK 5V 3A TO263-5 560 $2.585 Lowest 
LM2576HVSX-5.0/NOPB Texas Instruments IC REG BUCK 5V 3A TO263-5 45572 $1.984 Lowest 
LM2576HVSX-5.0 Texas Instruments IC REG BUCK 5V 3A TO263-5 25624 $1.993 Lowest 
LM2576HVS-5.0 Texas Instruments IC REG BUCK 5V 3A TO263-5 10430 $3.461 Lowest
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