Overview
The TPS54302DDCR is a 3-A synchronous buck converter designed and manufactured by Texas Instruments. This device features a wide input voltage range of 4.5 V to 28 V, making it versatile for various power supply applications. It integrates two n-channel MOSFETs, internal loop compensation, and a 5-ms internal soft start, which reduces the external component count and simplifies the control loop design. The TPS54302DDCR is packaged in a SOT-23-6 thin package, offering high power density and a small footprint on the PCB.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 28 | V |
| Output Current | 3 | A |
| High-Side MOSFET Resistance | 85 | mΩ |
| Low-Side MOSFET Resistance | 40 | mΩ |
| Switching Frequency | 400 | kHz |
| Quiescent Current | 45 | μA |
| Shutdown Current | 2 | μA |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | SOT-23-6 Thin |
Key Features
- Wide input voltage range of 4.5 V to 28 V
- Integrated 85-mΩ and 40-mΩ MOSFETs for 3-A continuous output current
- Low 2-μA shutdown and 45-μA quiescent current
- Internal 5-ms soft start
- Fixed 400-kHz switching frequency
- Frequency spread spectrum to reduce EMI
- Advanced Eco-mode™ pulse skip for improved light-load efficiency
- Peak current-mode control with internal loop compensation
- Overcurrent protection for both MOSFETs with hiccup mode protection
- Overvoltage protection
- Thermal shutdown
Applications
- 12-V and 24-V distributed power-bus supplies
- Industrial applications:
- White goods
- Consumer applications:
- Audio
- Set-top boxes (STB) and digital TVs (DTV)
- Printers
Q & A
- What is the input voltage range of the TPS54302DDCR?
The input voltage range is 4.5 V to 28 V.
- What is the maximum output current of the TPS54302DDCR?
The maximum output current is 3 A.
- What is the switching frequency of the TPS54302DDCR?
The switching frequency is fixed at 400 kHz.
- What is the quiescent current of the TPS54302DDCR when not switching?
The quiescent current is 45 μA (typical) when not switching and under no load).
- What is the shutdown current of the TPS54302DDCR?
The shutdown current is 2 μA (typical)).
- What type of package does the TPS54302DDCR use?
The device is packaged in a SOT-23-6 thin package).
- What are the key features of the TPS54302DDCR's EMI reduction?
The device features frequency spread spectrum operation to reduce EMI, with a jittering span of ±6% of the switching frequency).
- What protection mechanisms does the TPS54302DDCR have?
The device includes overcurrent protection with hiccup mode, overvoltage protection, and thermal shutdown).
- What are some typical applications of the TPS54302DDCR?
Typical applications include 12-V and 24-V distributed power-bus supplies, industrial white goods, and consumer electronics such as audio, STB, DTV, and printers).
- What is the operating temperature range of the TPS54302DDCR?
The operating temperature range is -40°C to 125°C).
