Overview
The TPS561208 is a 1-A synchronous step-down converter produced by Texas Instruments. It is designed to operate with a minimal number of external components and is optimized for low standby current. The device is available in a 6-pin SOT-23 package and is specified to operate over a junction temperature range of –40°C to 125°C. The TPS561208 employs Texas Instruments' proprietary D-CAP2 mode control, which provides fast transient response and supports the use of low ESR output capacitors such as specialty polymer and ceramic capacitors without the need for external compensation components.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | 17 | V | |
| Output Voltage Range | 0.76 | 7 | V | |
| Output Current | 1 | A | ||
| Switching Frequency | 580 | kHz | ||
| High-Side Switch Resistance | 140 | mΩ | ||
| Low-Side Switch Resistance | 84 | mΩ | ||
| Current Limit | 1.2 | 1.6 | 2.0 | A |
| Thermal Shutdown Threshold | 160 | °C | ||
| UVLO Threshold (Wake Up) | 4.0 | 4.3 | V | |
| UVLO Threshold (Shut Down) | 3.3 | 3.6 | V | |
| Soft-Start Time | 1.0 | ms |
Key Features
- D-CAP2 mode control with fast transient response, supporting low ESR output capacitors without external compensation components.
- Continuous current mode operation.
- Low shutdown current less than 10 µA.
- 2% Feedback voltage accuracy at 25°C.
- Start-up from pre-biased output voltage.
- Cycle-by-cycle overcurrent limit and hiccup-mode overcurrent protection.
- Non-latch UVP and TSD protections.
- Fixed soft start: 1.0 ms.
- Support for creating custom designs using the WEBENCH Power Designer.
Applications
- Digital TV power supply.
- High definition Blu-ray disc players.
- Networking home terminals.
- Digital set-top boxes (STB).
- Surveillance systems.
Q & A
- What is the input voltage range of the TPS561208? The input voltage range is from 4.5 V to 17 V.
- What is the output voltage range of the TPS561208? The output voltage range is from 0.76 V to 7 V.
- What is the switching frequency of the TPS561208? The switching frequency is approximately 580 kHz.
- What type of mode control does the TPS561208 use? The TPS561208 uses D-CAP2 mode control.
- What is the typical output current of the TPS561208? The typical output current is 1 A.
- What are the high-side and low-side switch resistances of the TPS561208? The high-side switch resistance is 140 mΩ, and the low-side switch resistance is 84 mΩ.
- What is the thermal shutdown threshold of the TPS561208? The thermal shutdown threshold is 160°C.
- Does the TPS561208 support start-up from a pre-biased output voltage? Yes, it does support start-up from a pre-biased output voltage.
- What are the protections available in the TPS561208? The device includes cycle-by-cycle overcurrent limit, hiccup-mode overcurrent protection, non-latch UVP, and TSD protections.
- What is the soft-start time of the TPS561208? The soft-start time is 1.0 ms.
