Series: -
Output Type: Adjustable
Number of Outputs: 1
PWM Type: -
Synchronous Rectifier: No
Operating Temperature: -40°C ~ 85°C
Mounting Type: Through Hole
Packaging: Tube
Type: Step-Down (Buck)
Voltage - Output: 1.23 V ~ 37 V
Current - Output: 3A
Supplier Device Package: TO-220-5
Package / Case: TO-220-5
Manufacturer: Micrel Inc
Voltage - Input: 4 V ~ 40 V
Frequency - Switching: 42kHz ~ 63kHz
DescriptionThe LM2576BT is designed as monolithic integrated circuit which 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.
LM2576BT has twelve features. (1)3.3V, 5V, 12V and adjustable output versions. (2)Voltage over specified line and load conditions fixed version +/-3% max output voltage and adjustable version +/-2% max feedback voltage. (3)Guaranteen 3A output current. (4)Wide input voltage range is 4V to 40V. (5)Its wide output voltage range would be from 1.23V to 37V. (6)Requires only 4 external components. (7)52kHz fixed frequency internal oscillator. (8)Low power standby mode Iq typically <200uA. (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. Those are all the main features.
Some absolute maximum ratings of LM2576BT have been concluded into several points as follow. (1)Its maximum supply voltage would be 45V. (2)Its ON/OFF pin input voltage would be from -0.3V to +40V. (3)Its output voltage to ground steady state would be -1V. (4)Its power dissipation would be internally limited. (5)Its storage temperature range would be from -65°C to 150°C. (6)Its minimum ESD rating would be 2kV and would be 1kV for FB pin. (7)Its lead temperature soldering 10sec would be 260°C. (8)Its maximum junction temperature would be 150°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.
Also some electrical characteristics of LM2576BT are concluded as follow. (1)Its feedback voltage would be min 1.217V and typ 1.230V and max 1.243V. (2)Its efficiency would be typ 82%. (3)Its output voltage would be min 3.234V and typ 3.3V and max 3.366V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!
Parameters: | Technical/Catalog Information | LM2576BT |
| Vendor | Micrel Inc |
| Category | Integrated Circuits (ICs) |
| Type | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage - Input | 4 ~ 40 V |
| Voltage - Output | 1.23 ~ 37 V |
| Current - Output | 3A |
| Power - Output | - |
| Package / Case | TO-220-5 (Straight Leads) |
| Packaging | Tube |
| Internal Switch(s) | Yes |
| Synchronous | - |
| Rds (On) | - |
| Operating Temperature | -40°C ~ 85°C |
| Frequency - Switching | 42kHz ~ 63kHz |
| Lead Free Status | Contains Lead |
| RoHS Status | RoHS Non-Compliant |
| Other Names | LM2576BT
LM2576BT
|
LM2576BT Data Sheet
