Overview
The TPS5450DDAR, produced by Texas Instruments, is a high-output-current PWM (Pulse Width Modulation) converter designed for high-efficiency power supply applications. This device integrates a low-resistance, high-side N-channel MOSFET and is suitable for a wide range of input voltages from 5.5 V to 36 V. It features a high-performance voltage error amplifier, undervoltage-lockout circuit, internally set slow-start circuit, and voltage feed-forward circuit to enhance transient response. The TPS5450 is available in a thermally enhanced 8-pin SOIC PowerPAD™ package, which helps in reducing design complexity and external component count.
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 5.5 V to 36 V |
| Output Current | Up to 5-A continuous (6-A peak) |
| Output Voltage Range | Adjustable down to 1.22 V with 1.5% initial accuracy |
| Switching Frequency | Fixed 500 kHz |
| Integrated MOSFET Resistance | 110 mΩ |
| Shutdown Supply Current | 18 µA typical |
| Operating Junction Temperature Range | –40°C to 125°C |
| Package Type | 8-pin SOIC PowerPAD™ |
Key Features
- Wide input voltage range: 5.5 V to 36 V
- High efficiency greater than 90% enabled by 110-mΩ integrated MOSFET switch
- Internal compensation minimizes external part count
- Fixed 500-kHz switching frequency for small filter size
- Improved line regulation and transient response by input voltage feedforward
- System protected by overcurrent limiting, overvoltage protection, and thermal shutdown
- Active-high enable and internal slow-start circuit to limit inrush currents
- Low shutdown supply current of 18 µA typical
Applications
- High density point-of-load regulators
- LCD and plasma displays
- Battery chargers
- 12-V and 24-V distributed power systems
Q & A
- What is the input voltage range of the TPS5450?
The input voltage range of the TPS5450 is from 5.5 V to 36 V.
- What is the maximum continuous output current of the TPS5450?
The TPS5450 can deliver up to 5-A continuous output current (6-A peak).
- What is the switching frequency of the TPS5450?
The switching frequency of the TPS5450 is fixed at 500 kHz.
- What is the typical shutdown supply current of the TPS5450?
The typical shutdown supply current of the TPS5450 is 18 µA.
- What protection features does the TPS5450 include?
The TPS5450 includes overcurrent limiting, overvoltage protection, and thermal shutdown.
- What is the operating junction temperature range of the TPS5450?
The operating junction temperature range of the TPS5450 is –40°C to 125°C.
- What type of package is the TPS5450 available in?
The TPS5450 is available in an 8-pin SOIC PowerPAD™ package.
- What are some common applications of the TPS5450?
Common applications include high density point-of-load regulators, LCD and plasma displays, battery chargers, and 12-V and 24-V distributed power systems.
- How does the TPS5450 improve transient response?
The TPS5450 improves transient response through input voltage feedforward and an internally set slow-start circuit.
- Does the TPS5450 require external compensation components?
No, the TPS5450 has internal compensation, which minimizes the need for external components.
