TPS61098 (ACTIVE)

Low Input Voltage Synchronous Boost Converter with Integrated LDO/Load Switch

 

Description

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 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 VMAIN rail; when input voltage is lower than the threshold, the boost works in boost mode and regulates 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 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.

Features

  • 300 nA Ultra-Low IQ in Low Power mode
  • Startup 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 ∼ 100 mA Load
    from 2 V to 3.3 V Conversion
  • 1.5 mm × 1.5 mm WSON Package

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Parametrics Compare all products in Boost Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switch Current Limit (Typ) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS61098 TPS610981 TPS610982 TPS610985 TPS610986 TPS610987 TPS61099 TPS61220 TPS61291
0.7    0.7    0.7    0.7    0.7    0.7    0.7    0.7    0.9   
4.5    4.5    4.5    4.5    4.5    4.5    5.5    5.5    5   
4.171    3.201    3.201    2.91    3.201    4.171    1.8    1.8    2.5   
4.429    3.399    3.399    3.09    3.399    4.429    5.5    5.5    3.3   
0.5    0.5    0.5    0.5    0.5    0.5    1    0.4    1   
2    2    2    2    2    2    1    1    1   
              500     
              2000     
0.0003    0.0003    0.0003    0.0003    0.0003    0.0003    0.0008    0.005    0.005   
Light Load Efficiency
Synchronous Rectification   
Light Load Efficiency
Synchronous Rectification   
Light Load Efficiency
Synchronous Rectification   
Light Load Efficiency
Synchronous Rectification   
Light Load Efficiency
Synchronous Rectification   
Light Load Efficiency
Synchronous Rectification   
Synchronous Rectification    Synchronous Rectification    Enable
Light Load Efficiency
Synchronous Rectification   
90    90    90    90    90    90    90    90    90   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
WSON    WSON    WSON    WSON    WSON    WSON    DSBGA    SC70    WSON   

WEBENCH® Designer TPS61098

  Min   Max Range
Vin1  V 0.70 to 4.50V

Vout1  V 2.20 to 4.50V
Iout1  A ≤ 0.35A

Vout2  V 3.10 to 3.10V
Iout2  A ≤ 0.2A

Ambient Temp  °C -40 to 120°C