LM2574M-3.3/NOPB Part Information
Details for LM2574M-3.3/NOPB by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
Part Description
The LM2574xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixedfrequency oscillator. The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
Part Downloads
Download PCB Footprint from Ultra Librarian
Part Features
- 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions
- 52-kHz Fixed-Frequency Internal Oscillator
- Adjustable Version Output Voltage Range: 1.23 V to 37 V (57 V for HV version) u00b14% Maximum Over Line and Load Conditions
- High Efficiency
- Requires Only 4 External Components
- Specified 0.5-A Output Current
- TTL Shutdown Capability, Low-Power Standby Mode
- Thermal Shutdown and Current-Limit Protection
- Uses Readily Available Standard Inductors
- Wide Input Voltage Range: 40 V, up to 60 V for HV Version
Part Specifications
| Topology | Buck (Step Down) |
| Input Voltage Min | 4V |
| Input Voltage Max | 40V |
| DC / DC Converter IC Case | SOIC |
| No. of Pins | 14Pins |
| Output Current | 500mA |
| Output Voltage Nom. | 3.3V |
| Switching Frequency | 52kHz |
| Operating Temperature Max | 125°C |
| Product Range | - |
| Automotive Qualification Standard | - |
| RoHS Phthalates Compliant | Yes |
| MSL | MSL 3 - 168 hours |
| SVHC | No SVHC (27-Jun-2018) |
| Frequency | 52kHz |
| No. of Outputs | 1Outputs |
| Operating Temperature Min | -40°C |
| Output Voltage | 3.3V |
| Primary Input Voltage | 12V |
Alternative Part Descriptions
- DC-DC Converter Step-Down 4-40V SOIC14W | RS Components
- IC, SIMPLE SWITCHER, 52KHZ, SOIC-14; Topology:Buck (Step Down); Input Voltage Min:4V; Input Voltage Max:40V; DC / DC Converter IC Case:SOIC; No. of Pins:14Pins; Output Current:500mA; Output Voltage Nom.:3.3V; Switching RoHS Compliant: Yes | Newark Electronics
- PMIC; DC/DC converter; Uin: 4÷40V; Uout: 3.3V; SO14-W; buck | Transfer Multisort Elektronik
- 8V to 40V, 500mA SIMPLE SWITCHER® buck converter with 4 external components | Texas Instruments
- Switching controller IC [Texas Instruments] LM2574M-3.3/NOPB Switching controller IC | Distrelec