Overview
The TPS54260DGQ from Texas Instruments is a high-performance, 60-V, 2.5-A step-down (buck) regulator with an integrated high-side N-channel MOSFET. This device is designed to convert higher DC voltages to lower DC voltages efficiently, making it suitable for various industrial, automotive, and commercial power systems. The regulator features a constant frequency, current mode control, which simplifies external frequency compensation and reduces output capacitance requirements. It also includes a pulse-skip Eco-mode for improved efficiency at light loads and a wide switching frequency range of 100 kHz to 2.5 MHz, allowing for optimization of efficiency and external component size.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range | 3.5 V to 60 V |
| Output Current | Up to 2.5 A |
| Switching Frequency | 100 kHz to 2.5 MHz |
| Output Voltage Range | As low as 0.8 V |
| High-Side MOSFET Resistance | 200 mΩ |
| Quiescent Current (No Load) | 138 μA |
| Shutdown Current | 1.3 μA |
| Package Types | 10-pin HVSSOP, 10-pin 3-mm × 3-mm VSON PowerPAD |
| Undervoltage Lockout (UVLO) | Internally set at 2.5 V, adjustable |
Key Features
- High Efficiency: The TPS54260 features high efficiency at light loads with a pulse-skip Eco-mode, reducing switching and gate drive losses.
- Integrated High-Side MOSFET: Includes a 200-mΩ high-side N-channel MOSFET for high efficiency power supply designs.
- Wide Switching Frequency Range: Adjustable switching frequency from 100 kHz to 2.5 MHz, allowing for optimization of efficiency and external component size.
- Low Ripple Pulse-Skip Mode: Reduces no-load regulated output supply current to 138 μA.
- Power Good Signal: An open-drain power good signal indicates when the output is within 94% to 107% of its nominal voltage.
- Sequencing and Tracking: The SS/TR pin can be used for slow-start, tracking, and sequencing during power-up.
- Overvoltage Transient Protection: Minimizes voltage overshoot when recovering from output fault conditions or strong unload transients.
- Frequency Foldback and Thermal Shutdown: Protects the device during overload conditions by reducing the switching frequency and initiating thermal shutdown if necessary.
Applications
- Industrial and Commercial Power Systems: Suitable for 12-V, 24-V, and 48-V systems.
- GSM, GPRS Modules: Used in fleet management, e-meters, and security systems.
- Automotive Systems: Applicable in various automotive power supply requirements.
- Low-Power Systems: Ideal for systems requiring efficient power conversion with minimal component count.
Q & A
- What is the input voltage range of the TPS54260DGQ?
The input voltage range is from 3.5 V to 60 V.
- What is the maximum output current of the TPS54260DGQ?
The maximum output current is up to 2.5 A.
- What is the switching frequency range of the TPS54260DGQ?
The switching frequency range is from 100 kHz to 2.5 MHz.
- How does the TPS54260DGQ handle overvoltage transients?
The device incorporates an overvoltage transient protection (OVTP) circuit to minimize voltage overshoot during recovery from output fault conditions or strong unload transients.
- What is the quiescent current of the TPS54260DGQ when not switching and under no load?
The quiescent current is 138 μA.
- How does the TPS54260DGQ protect against thermal overload?
The device features thermal shutdown and frequency foldback to protect against thermal overload conditions.
- What is the purpose of the SS/TR pin in the TPS54260DGQ?
The SS/TR pin is used for slow-start, tracking, and sequencing during power-up.
- How does the TPS54260DGQ handle sequencing and tracking in power supply systems?
The device can implement various power supply sequencing methods using the SS/TR, EN, and PWRGD pins.
- What is the typical shutdown current of the TPS54260DGQ when the enable pin is low?
The shutdown current is 1.3 μA when the enable pin is low.
- What are some common applications of the TPS54260DGQ?
Common applications include industrial and commercial power systems, GSM and GPRS modules, and automotive systems.
