Overview
The TPSM84209RKHT from Texas Instruments is a highly integrated 2.5-A synchronous step-down power module designed for a wide range of applications. This module combines a DC/DC converter, a shielded inductor, and passives into a low-profile QFN package, making it ideal for space-constrained designs. The device operates with an input voltage range of 4.5 V to 28 V and can output voltages from 1.2 V to 6 V, making it versatile for various power rails. The module is easy to use and requires as few as four external components, while still allowing for key parameter adjustments to meet specific design requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 28 | V |
| Output Voltage Range | 1.2 to 6 | V |
| Output Current | Up to 2.5 | A |
| Switching Frequency | 750 | kHz |
| Package Type | QFN-9 (4x4.4 mm) | |
| Operating Junction Temperature | -40 to +125 | °C |
| Operating Ambient Temperature | -40 to +85 | °C |
| Thermal Resistance (Junction-to-Ambient) | 32.7 | °C/W |
Key Features
- Advanced Eco-mode™: Enhances light-load efficiency through pulse-skipping operation.
- Programmable Undervoltage Lockout (UVLO): Allows adjustment of the UVLO threshold using an external resistor divider on the EN pin.
- Overtemperature Thermal Shutdown Protection: Protects the device by stopping switching if the junction temperature exceeds 165°C.
- Overcurrent Protection (Hiccup Mode): Reduces power dissipation during load faults by periodically attempting to recover through soft-start power-up.
- Safe Prebias Output Start-Up: Ensures safe startup even with prebiased output.
- Integrated Shielded Inductor: Meets EN55011 radiated EMI standards.
- Adjustable Output Voltage: Output voltage can be adjusted from 1.2 V to 6 V using an external resistor divider.
- High Efficiency: Maintains high efficiency across a wide range of load conditions.
Applications
- Industrial and Motor Controls: Suitable for powering control systems and motor drives in industrial environments.
- Automated Test Equipment: Ideal for powering test equipment due to its high reliability and efficiency.
- Medical and Imaging Equipment: Used in medical devices requiring stable and efficient power supply.
- High-Density Power Systems: Perfect for high-density power systems where space is a constraint.
Q & A
- What is the input voltage range of the TPSM84209RKHT?
The input voltage range is from 4.5 V to 28 V.
- What is the maximum output current of the TPSM84209RKHT?
The maximum output current is up to 2.5 A.
- What is the switching frequency of the TPSM84209RKHT?
The switching frequency is fixed at 750 kHz.
- How can the output voltage be adjusted?
The output voltage can be adjusted from 1.2 V to 6 V using an external resistor divider connected to the FB pin.
- What protection features does the TPSM84209RKHT have?
The device features overtemperature thermal shutdown protection, overcurrent protection (hiccup mode), and safe prebias output start-up.
- What is the operating junction temperature range of the TPSM84209RKHT?
The operating junction temperature range is from -40°C to +125°C.
- How does the Eco-mode™ enhance efficiency?
The Eco-mode™ enhances light-load efficiency through pulse-skipping operation, reducing power consumption during light load conditions.
- What type of package does the TPSM84209RKHT come in?
The device comes in a QFN-9 (4x4.4 mm) package.
- Does the TPSM84209RKHT meet any specific EMI standards?
Yes, it meets EN55011 radiated EMI standards due to its integrated shielded inductor.
- How can the UVLO threshold be adjusted?
The UVLO threshold can be adjusted upward using a resistor divider on the EN pin.
