(ACTIVE) Low Input Voltage, 0.7V Boost Converter with 5.5μA Quiescent Current


Functional Diagram


The TPS6122x family devices provide a power-supply solution for products powered by either a single-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Possible output currents depend on the input-to-output voltage ratio. The boost converter is based on a hysteretic controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent currents. The output voltage of the adjustable version can be programmed by an external resistor divider, or is set internally to a fixed output voltage. The converter can be switched off by a featured enable pin. While being switched off, battery drain is minimized. The device is offered in a 6-pin SC-70 package (DCK) measuring 2 mm × 2 mm to enable small circuit layout size.


  • Up to 95% Efficiency at Typical Operating
  • 5.5 µA Quiescent Current
  • Startup Into Load at 0.7 V Input Voltage
  • Operating Input Voltage from 0.7 V to 5.5 V
  • Pass-Through Function during Shutdown
  • Minimum Switching Current 200 mA
  • Protections:
    • Output Overvoltage
    • Overtemperature
    • Input Undervoltage Lockout
  • Adjustable Output Voltage from 1.8 V to 6 V
  • Fixed Output Voltage Versions
  • Small 6-pin SC-70 Package


Vin (Min) (V) 0.7    
Vin (Max) (V) 5.5    
Vout (Min) (V) 1.8    
Vout (Max) (V) 5.5    
Switch Current Limit (Typ) (A) 0.4    
Regulated Outputs (#) 1    
Switching Frequency (Min) (kHz) 500    
Switching Frequency (Max) (kHz) 2000    
Iq (Typ) (mA) 0.005    
Features Synchronous Rectification    
Duty Cycle (Max) (%) 90    
Operating Temperature Range (C) -40 to 85    
Type Converter    
Rating Catalog    
Package Group SC70|6    

Companion Products

Technical Documents

Datasheet (1)

Application notes (11)

User guides (2)

Selection guides (3)

Design files (3)

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