Overview
The LM2587SX-ADJ/NOPB is a versatile and highly efficient step-up (boost), flyback, and forward converter regulator produced by Texas Instruments. This monolithic integrated circuit is designed to operate over a wide input voltage range of 4V to 40V and can deliver up to 5A of output current. The LM2587 series, including the LM2587SX-ADJ/NOPB, is known for its simplicity and cost-effectiveness, requiring a minimal number of external components to function.
This regulator features a 5A NPN power switch that can withstand up to 65V, making it suitable for various high-power applications. The device includes internal current and thermal limiting circuits, as well as an undervoltage lockout circuit, to ensure reliable operation and protection against overloads.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Input Voltage Range | - | 4 | 40 | V |
| Output Current Limit | 6.5 | 5 | - | A |
| Switching Frequency Range | - | 85 | 115 | kHz |
| Operating Temperature Range | - | -40 | 125 | °C |
| Output Voltage Tolerance | - | -4% | 4% | % |
| Package Type | DDPAK/TO-263 | - | - | - |
| Package Dimensions | 10.16 mm x 8.42 mm x 4.58 mm | - | - | - |
Key Features
- Wide Input Voltage Range: Operates from 4V to 40V, making it versatile for various power supply applications.
- High Current Capability: The 5A NPN power switch can handle high current requirements.
- Internal Oscillator: A fixed-frequency internal oscillator at 100 kHz allows for the use of small magnetics.
- Current Mode Control: Provides improved rejection of input voltage and output load transients.
- Soft-Start Mode: Reduces in-rush current during startup.
- Thermal and Current Limiting: Includes internal circuits for thermal and current limiting, as well as undervoltage lockout.
- Adjustable Output Voltage: The LM2587SX-ADJ/NOPB model allows for adjustable output voltage settings.
Applications
- Flyback Regulator: Suitable for flyback converter applications where a high efficiency and wide input voltage range are required.
- Step-Up (Boost) Regulator: Can be used to produce an output voltage greater than the input supply voltage.
- Multiple-Output Regulator: Can be configured to provide multiple regulated output voltages.
- Forward Converter: Applicable in forward converter designs where high efficiency and reliability are crucial.
Q & A
- What is the input voltage range of the LM2587SX-ADJ/NOPB?
The input voltage range is from 4V to 40V.
- What is the maximum output current of the LM2587SX-ADJ/NOPB?
The maximum output current is up to 5A.
- What is the switching frequency range of the LM2587SX-ADJ/NOPB?
The switching frequency range is from 85 kHz to 115 kHz.
- What are the key protection features of the LM2587SX-ADJ/NOPB?
The device includes current limiting, thermal limiting, and undervoltage lockout circuits.
- What is the operating temperature range of the LM2587SX-ADJ/NOPB?
The operating temperature range is from -40°C to 125°C.
- What package types are available for the LM2587SX-ADJ/NOPB?
The device is available in DDPAK/TO-263 and TO-220 packages.
- Can the LM2587SX-ADJ/NOPB be used in multiple-output regulator applications?
Yes, it can be configured to provide multiple regulated output voltages.
- How does the soft-start mode of the LM2587SX-ADJ/NOPB benefit the system?
The soft-start mode reduces in-rush current during startup, preventing potential damage to the system.
- What is the significance of the internal oscillator in the LM2587SX-ADJ/NOPB?
The internal oscillator at 100 kHz allows for the use of small magnetics, making the design more compact and efficient.
- Is the LM2587SX-ADJ/NOPB suitable for high-power applications?
Yes, it is designed to handle high current and voltage requirements, making it suitable for high-power applications.
