Overview
The LM2595SX-5.0, produced by Texas Instruments (originally from National Semiconductor), is a monolithic integrated circuit designed as a step-down (buck) switching regulator. This device is part of the LM2595 series, which provides all the active functions necessary for a high-efficiency switching regulator. It is capable of driving a 1-A load with excellent line and load regulation. The LM2595SX-5.0 is available in fixed output voltages, including a 5V version, and is known for its simplicity and minimal requirement for external components.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 40 | V |
| Output Voltage | 5 | V |
| Output Current | 1 | A |
| Switching Frequency | 150 | kHz |
| Output Voltage Tolerance | ±4% | |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | TO-263 (DDPAK) | |
| Number of Pins | 5 (including tab) | |
| Standby Current | Typically 85 µA |
Key Features
- Available in fixed output voltages (3.3 V, 5 V, 12 V) and an adjustable output version (1.2 V to 37 V).
- High-efficiency step-down switching regulator with a fixed-frequency internal oscillator at 150 kHz.
- Requires only 4 external components for operation.
- Excellent line and load regulation specifications.
- TTL shutdown capability and low power standby mode.
- Thermal shutdown and current-limit protection for fault conditions.
- Uses readily available standard inductors, simplifying the design of switch-mode power supplies.
- No heat sink required for output voltages less than 12 V and ambient temperatures less than 50°C.
Applications
The LM2595SX-5.0 is suitable for a wide range of applications requiring efficient step-down voltage regulation. These include:
- Point-of-load power supplies in industrial and consumer electronics.
- Power supplies for embedded systems and microcontrollers.
- Voltage regulation in automotive systems.
- Telecommunication equipment and networking devices.
- Medical devices requiring stable and efficient power supply.
Q & A
- What is the input voltage range of the LM2595SX-5.0?
The input voltage range is from 4.5 V to 40 V.
- What is the output current capability of the LM2595SX-5.0?
The device can drive a load current of up to 1 A.
- What is the switching frequency of the LM2595SX-5.0?
The switching frequency is fixed at 150 kHz.
- What is the output voltage tolerance of the LM2595SX-5.0?
The output voltage tolerance is ±4% under specified input voltage and output load conditions).
- What type of package is the LM2595SX-5.0 available in?
The device is available in a TO-263 (DDPAK) package).
- Does the LM2595SX-5.0 require a heat sink for operation?
No heat sink is required for output voltages less than 12 V and ambient temperatures less than 50°C).
- What is the standby current of the LM2595SX-5.0?
The standby current is typically 85 µA).
- What protection features does the LM2595SX-5.0 have?
The device includes thermal shutdown and current-limit protection for fault conditions).
- How many external components are required for the LM2595SX-5.0 to operate?
The device requires only 4 external components for operation).
- Is the LM2595SX-5.0 RoHS compliant?
