Low input voltage, 3.3-V output voltage, synchronous boost converter with integrated load switch


Product details


Vin (Min) (V) 0.7 Vin (Max) (V) 4.5 Vout (Min) (V) 3.201 Vout (Max) (V) 3.399 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 open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

WSON (DSE) 6 2 mm² 1.5 x 1.5 open-in-new Find other Boost converters (integrated switch)


  • 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
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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) Sep. 10, 2021
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application note Accurately measuring efficiency of ultralow-IQ devices Jan. 22, 2014
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011

Design & development

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Hardware development

document-generic User guide

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 (...)


  • 300 nA ultra-low IQ in Light Load
  • 1.5mm x 1.5mm 6-SON Package
  • Integrated LDO/Load Switch
  • Up to 80% Efficiency at 10 μA Load Current
  • Two Modes Controlled by MODE pin

Design tools & simulation

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WSON (DSE) 6 View options

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