Overview
The LM2576HVSX-12 is a part of the LM2576HV series, a family of monolithic integrated circuits designed for step-down (buck) switching regulator applications. These devices are produced by Texas Instruments, which acquired National Semiconductor. The LM2576HVSX-12 is specifically configured to provide a fixed output voltage of 12V and is capable of driving a 3A load with excellent line and load regulation.
Key Specifications
| Parameter | Conditions | LM2576HVSX-12 |
|---|---|---|
| Output Voltage | VIN = 25V, ILOAD = 0.5A | 12V (11.76V Min, 12.24V Max) |
| Output Voltage Range | 15V ≤ VIN ≤ 60V, 0.5A ≤ ILOAD ≤ 3A | 11.52V Min, 12.66V Max |
| Input Voltage Range | 4V to 60V | |
| Maximum Junction Temperature | 150°C | |
| Operating Temperature Range | -40°C to 125°C | |
| Efficiency | VIN = 15V, ILOAD = 3A | 88% |
| Oscillator Frequency | 52 kHz (47 kHz Min, 58 kHz Max) | |
| Current Limit | 3A | |
| Package | TO-263 (KTT), 5 pins |
Key Features
- High efficiency, reducing the need for large heat sinks.
- Fixed output voltage of 12V, with other versions available for 3.3V, 5V, 15V, and adjustable output.
- Wide input voltage range: 4V to 60V for the HV version.
- Guaranteed 3A output current.
- Requires only four external components: inductor, diode, input capacitor, and output capacitor.
- 52 kHz fixed-frequency internal oscillator.
- TTL shutdown capability with low-power standby mode.
- Thermal shutdown and cycle-by-cycle current limiting for fault protection.
- Uses readily available standard inductors.
Applications
- On-card switching regulators.
- Efficient pre-regulator for linear regulators.
- Positive to negative converter (Buck-Boost) configurations.
- Simple high-efficiency step-down (buck) regulators.
- Power supplies in various electronic devices requiring high efficiency and reliability.
Q & A
- What is the output voltage of the LM2576HVSX-12?
The output voltage of the LM2576HVSX-12 is fixed at 12V.
- What is the input voltage range for the LM2576HV series?
The input voltage range for the LM2576HV series is 4V to 60V.
- How much current can the LM2576HVSX-12 handle?
The LM2576HVSX-12 can handle up to 3A of output current.
- What is the oscillator frequency of the LM2576HV series?
The oscillator frequency is fixed at 52 kHz.
- Does the LM2576HVSX-12 have built-in protection features?
- How many external components are required for the LM2576HVSX-12?
- What is the operating temperature range for the LM2576HVSX-12?
- Is the LM2576HVSX-12 suitable for high-efficiency applications?
- Can the LM2576HVSX-12 be used in standby mode?
- What package type is the LM2576HVSX-12 available in?
