Texas Instruments' TPS61252 device provides a power supply solution for products powered by either a three-cell alkaline, NiCd or NiMH battery or a one-cell Li-Ion or Li-polymer battery. The wide input voltage range is ideal to power portable applications like mobile phones or for computer peripherals. The device has a resistor programmable (RILIM) input current limit and is suitable for a wide variety of applications.
During light loads the device will automatically enter skip mode (PFM), which allows the converter to maintain the required output voltage, while only drawing 30 µA from the battery. This allows maximum efficiency at lowest quiescent currents.
TPS61252 allows the use of small inductors and input capacitors to achieve a small solution size. The possibility to reduce the current limit by a external resistor offers the potential use of physically even smaller inductors with lower rated current to further reduce total solution sizes of the power supply. During shutdown, the load is completely disconnected from the battery. The TPS61252 is available in an 8-pin QFN package measuring 2×2 mm (DSG).
- Resistor programmable input current limit
- Up to 92% efficiency
- VIN range from 2.3 V to 6.0 V
- Power good indicates appropriate output voltage level
- Adjustable output voltage up to 6.5 V
- 100% duty-cycle mode when VIN > VOUT
- Load disconnect and reverse current protection
- Short circuit protection
- Typical operating frequency 3.25 MHz
- Available in a 2×2 mm QFN-8 package
- USB host supplies from a single Li-Ion battery
- Current limited applications
- Li-Ion applications
- Audio applications
- RF-PA buffer