Product details

Vin (Min) (V) 0.7 Vin (Max) (V) 4.5 Vout (Min) (V) 4.171 Vout (Max) (V) 4.429 Switch current limit (Typ) (A) 0.5 Regulated outputs (#) 2 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 3000 Iq (Typ) (mA) 0.0003 Features Light Load Efficiency, Synchronous Rectification Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 85 Rating Catalog
Vin (Min) (V) 0.7 Vin (Max) (V) 4.5 Vout (Min) (V) 4.171 Vout (Max) (V) 4.429 Switch current limit (Typ) (A) 0.5 Regulated outputs (#) 2 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 3000 Iq (Typ) (mA) 0.0003 Features Light Load Efficiency, Synchronous Rectification Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 85 Rating Catalog
WSON (DSE) 6 2 mm² 1.5 x 1.5
  • 300-nA ultra-low IQ in low power mode
  • Start-up into load at 0.7-V input voltage
  • Operating input voltage from 0.7 V to 4.5 V
  • Selectable output voltages up to 4.3 V
  • Minimum 350-mA switch peak current limit
  • Integrated LDO/load switch
  • Two modes controlled by MODE pin
    • Active mode: dual outputs at set values
    • Low power mode: LDO/load switch off; boost keeps on
  • Automatic pass-through
  • Up to 88% efficiency at 10-µA load from 2 V to 3.3 V conversion (low power mode)
  • Up to 93% efficiency at 5-mA to 100-mA load from 2-V to 3.3-V conversion
  • 1.5-mm × 1.5-mm WSON package
  • 300-nA ultra-low IQ in low power mode
  • Start-up into load at 0.7-V input voltage
  • Operating input voltage from 0.7 V to 4.5 V
  • Selectable output voltages up to 4.3 V
  • Minimum 350-mA switch peak current limit
  • Integrated LDO/load switch
  • Two modes controlled by MODE pin
    • Active mode: dual outputs at set values
    • Low power mode: LDO/load switch off; boost keeps on
  • Automatic pass-through
  • Up to 88% efficiency at 10-µA load from 2 V to 3.3 V conversion (low power mode)
  • Up to 93% efficiency at 5-mA to 100-mA load from 2-V to 3.3-V conversion
  • 1.5-mm × 1.5-mm WSON package

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.

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.

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Technical documentation

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Type Title Date
* Data sheet TPS61098x Ultra-Low Quiescent Current Synchronous Boost with Integrated LDO/Load Switch datasheet (Rev. F) 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 03 May 2016
Technical article How to boost your battery-powered wireless sensor nodes 04 Aug 2015
User guide TPS610981 Evaluation Module User's Guide 19 Jun 2015
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

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS610981EVM-674 — TPS610981 Ultra Low Quiescent Current Boost Evaluation Module

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 (...)

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Simulation model

TPS61098 Unencrypted PSpice Transient Model Package (Rev. B)

SLVMB00B.ZIP (82 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-050018 — Low-power AAA-battery reference design with 6-µA standby power for multi-purpose sensor

This reference design demonstrates a low-power boost converter solution used for door and windows sensors. The design includes an alkaline battery, an ultra-low quiescent-current boost converter and ultra-low power consuming digital Hall effect sensors. It can also power an ultra-low power (...)
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WSON (DSE) 6 View options

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