Overview
The LM2574HVMX-ADJ/NOPB is a high-voltage, adjustable step-down (buck) switching regulator produced by Texas Instruments. This monolithic integrated circuit is designed to provide all the active functions for a step-down switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. The device is part of the LM2574xx series, which offers a high-efficiency replacement for popular three-terminal linear regulators.
Key Specifications
| Parameter | Description |
|---|---|
| Part Number | LM2574HVMX-ADJ/NOPB |
| Function | Step-Down (Buck) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 4V |
| Voltage - Input (Max) | 60V |
| Voltage - Output (Min/Fixed) | 1.23V |
| Voltage - Output (Max) | 37V |
| Current - Output | 500mA |
| Frequency - Switching | 52kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C to 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.295", 7.50mm Width) |
Key Features
- Adjustable output voltage range: 1.23 V to 37 V ±4% maximum over line and load conditions
- Specified 0.5-A output current
- Wide input voltage range: up to 60 V for HV Version
- Requires only four external components
- 52-kHz Fixed-frequency internal oscillator
- TTL shutdown capability, low-power standby mode
- High efficiency
- Uses readily available standard inductors
- Thermal shutdown and current-limit protection
Applications
The LM2574HVMX-ADJ/NOPB is suitable for a variety of applications requiring efficient step-down voltage regulation. These include:
- Power supplies for industrial and consumer electronics
- Battery-powered systems
- Distributed power systems
- Point-of-load power supplies
- Replacement for three-terminal linear regulators in high-efficiency applications
Q & A
- What is the input voltage range of the LM2574HVMX-ADJ/NOPB?
The input voltage range is from 4V to 60V.
- What is the adjustable output voltage range of the LM2574HVMX-ADJ/NOPB?
The adjustable output voltage range is from 1.23V to 37V.
- What is the maximum output current of the LM2574HVMX-ADJ/NOPB?
The maximum output current is 500mA.
- What is the switching frequency of the LM2574HVMX-ADJ/NOPB?
The switching frequency is 52kHz.
- Does the LM2574HVMX-ADJ/NOPB have thermal shutdown and current-limit protection?
- What is the operating temperature range of the LM2574HVMX-ADJ/NOPB?
The operating temperature range is from -40°C to 125°C (TJ).
- What package type does the LM2574HVMX-ADJ/NOPB come in?
The device comes in a 14-SOIC (0.295", 7.50mm Width) package.
- Does the LM2574HVMX-ADJ/NOPB have TTL shutdown capability?
- How many external components are required for the LM2574HVMX-ADJ/NOPB?
- Is the LM2574HVMX-ADJ/NOPB RoHS compliant?
