Overview
The TPS61252DSGR is a high-efficiency, tiny 1.5-A boost converter designed by Texas Instruments. This device is ideal for powering portable applications such as mobile phones, computer peripherals, and other devices that require a compact power supply solution. It supports input from various battery types, including three-cell alkaline, NiCd, NiMH, and one-cell Li-Ion or Li-polymer batteries. The TPS61252 features an adjustable input current limit, power save mode, and a small footprint, making it suitable for a wide range of applications where space and efficiency are critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (VIN) | 2.3 V to 6.0 V | V |
| Output Voltage Range (VOUT) | Up to 6.5 V | V |
| Maximum Output Current | 1.5 A | A |
| Input Current Limit | Programmable from 100 mA to 1500 mA | mA |
| Efficiency | Up to 92% | % |
| Quiescent Current | 30 μA | μA |
| Switching Frequency | Typical 3.25 MHz | MHz |
| Package | 8-Pin WSON (2 mm x 2 mm) | - |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- Adjustable Input Current Limit: Programmable from 100 mA to 1500 mA using an external resistor (RILIM).
- Power Save Mode: Automatically enters skip mode (PFM) during light loads to maintain efficiency and reduce quiescent current.
- 100% Duty-Cycle Mode: Operates with the high-side switch constantly on when VIN > VOUT, ensuring the output voltage follows the input voltage.
- Load Disconnect and Reverse Current Protection: Ensures the load is completely disconnected from the battery during shutdown and protects against reverse current.
- Short Circuit Protection: Reduces the current limit to prevent overheating during short-circuit conditions.
- Thermal Regulation and Shutdown: Monitors die temperature and reduces current or enters thermal shutdown to prevent overheating.
- Internal Softstart: Controls the ramp-up of the current during start-up to prevent inrush current.
- Power Good Indicator: Indicates when the output voltage is within the appropriate range.
Applications
- Portable Electronics: Ideal for powering mobile phones, tablets, and other portable devices.
- Computer Peripherals: Suitable for powering USB host supplies from a single Li-Ion battery.
- Audio Applications: Can be used in audio devices requiring efficient power conversion.
- RF Power Amplifier (RF-PA) Buffer: Useful in RF applications where efficient power supply is crucial.
- Current Limited Applications: Applications requiring precise control over input current.
- Li-Ion Battery-Powered Devices: Supports one-cell Li-Ion or Li-polymer batteries.
Q & A
- What is the input voltage range of the TPS61252?
The input voltage range is from 2.3 V to 6.0 V.
- What is the maximum output current of the TPS61252?
The maximum output current is 1.5 A.
- How is the input current limit adjusted on the TPS61252?
The input current limit is programmable from 100 mA to 1500 mA using an external resistor (RILIM).
- What is the typical switching frequency of the TPS61252?
The typical switching frequency is 3.25 MHz.
- What is the quiescent current of the TPS61252 in power save mode?
The quiescent current is 30 μA in power save mode.
- Does the TPS61252 have thermal protection features?
Yes, it includes thermal regulation and thermal shutdown to prevent overheating.
- What type of package is the TPS61252 available in?
The TPS61252 is available in an 8-pin WSON package measuring 2 mm x 2 mm.
- What is the operating temperature range of the TPS61252?
The operating temperature range is -40°C to 85°C.
- Does the TPS61252 have a power good indicator?
Yes, it has a power good indicator that signals when the output voltage is within the appropriate range.
- What are some common applications of the TPS61252?
Common applications include portable electronics, computer peripherals, audio devices, and RF power amplifier buffers.
