The TPS61098x is an ultra-low power solution for products powered by either a one-cell or two-cell alkaline, NiCd or NiMH, one-cell coin cell or one-cell Li-Ion or Li-polymer battery. It integrates either a Low-dropout Linear Regulator (LDO) or a load switch with a boost converter and provides two output rails. The boost output V(MAIN) is designed as an always-on supply for a main system, and the LDO or load switch output V(SUB) is to power peripheral devices.
The TPS61098x has two modes controlled by the MODE pin: Active mode and Low Power mode. In Active mode, both outputs are enabled with enhanced response performance. In Low Power mode, the LDO or load switch is disabled to disconnect peripherals. The TPS61098x consumes only 300-nA quiescent current and can achieve up to 88% efficiency at 10-µA load in Low Power mode.
The TPS61098x supports automatic pass-through function. When input voltage is higher than a pass-through threshold, the boost converter stops switching and passes the input voltage to the VMAIN rail; when input voltage is lower than the threshold, the boost works in Boost mode and regulates the output at the target value. The TPS61098x provides different versions for different output set values.
The TPS61098x can provide up to 50-mA total output current at 0.7-V input to 3.3-V output conversion. The boost is based on a hysteretic controller topology using a synchronous rectifier to obtain maximum efficiency at minimal quiescent current.
The TPS61098x is available in 1.5-mm × 1.5-mm WSON package to enable small circuit layout size.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TPS61098x Ultra-Low Quiescent Current Synchronous Boost with Integrated LDO/Load Switch datasheet (Rev. F) | PDF | HTML | 10 Sep 2021 |
| Application note | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 11 Dec 2018 | ||
| Application note | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 15 Jun 2017 | ||
| Application note | Calculating and Measuring the No Load Input Current of the Boost Converter | 23 Sep 2016 | ||
| Application note | How to Select a Proper Inductor for Low Power Boost Converter | 03 Jun 2016 | ||
| Application note | Five Steps to a Good PCB Layout of the Boost Converter | PDF | HTML | 03 May 2016 | |
| Analog Design Journal | Accurately measuring efficiency of ultralow-IQ devices | 22 Jan 2014 | ||
| Analog Design Journal | IQ: What it is, what it isn’t, and how to use it | 17 Jun 2011 |
For additional terms or required resources, click any title below to view the detail page where available.
The TPS61098 provides an ultra-low quiescent power supply solution for products powered by either a single cell or two-cell alkaline, one-cell coin cell battery or one-cell Li-Ion or Li-polymer battery. It integrates a load switch or LDO, and can provide two separate output power rails. The main (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (DSE) | 6 | Ultra Librarian |
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