Texas Instruments Incorporated (TI) (NYSE: TXN) introduced a tiny, high-voltage boost converter with an integrated 40-V, 1.2-A FET and a wide input-voltage range of 3-V to 18-V. The high-efficiency device supports boost, SEPIC (single-ended primary inductor converter) and flyback topologies, which are used to regulate single or dual Li-Ion battery inputs. Available in a 2 mm x 2 mm QFN package, the converter simplifies design in industrial or medical point-of-load applications, such as 5-V to 12-V or 12-V to 24-V systems.
The TPS61170 operates at a fixed switching frequency of 1.2 MHz, allowing the use of tiny, low-profile inductors and low-value ceramic input and output capacitors. The boost converter features single-wire digital serial interface and pulse width modulation (PWM) inputs, which allows the device to dynamically adjust the output voltage during operation. Protection features of the TPS61170 include soft-start, over-current limit and over-temperature protection.
Key features of TPS61170
- 3-V to 18-V input voltage range
- Integrated 40-V, 1.2-A FET switch
- 1.2-MHz fixed switching frequency
- Greater than 90 percent efficiency
- Programmable reference voltage using PWM signal or single-wire digital interface
- Built-in soft start and over-current limit
Pricing and Availability
The TPS61170 is available today in volume from TI and its authorized distributors. Suggested resale pricing in quantities of 1,000 units is $1.40.