3V-17V, 300mA Buck Converter With Adjustable Enable Threshold And Hysteresis - TPS62125


3V-17V, 300mA Buck Converter With Adjustable Enable Threshold And Hysteresis

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The TPS62125 is a high efficiency synchronous step down converter optimized for low and ultra low power applications providing up to 300mA output current. The wide input voltage range of 3V to 17V supports four cell alkaline and 1 to 4 cell Li-Ion batteries in series configuration as well as 9V to 15V powered applications. The device includes a precise low power enable comparator which can be used as an input supply voltage supervisor (SVS) to address system specific power up and down requirements. The enable comparator consumes only 6µA quiescent current and features an accurate threshold of 1.2V typical as well as an adjustable hysteresis. With this feature, the converter can generate a power supply rail by extracting energy from a storage capacitor fed from high impedance sources such as solar panels or current loops. With its DCS - Control TM scheme the converter provides power save mode operation to maintain highest efficiency over the entire load current range. At light loads the converter operates in PFM mode (pulse frequency modulation) and transitions seamlessly and automatically in PWM (pulse width modulation) mode at higher load currents. The DCS - ControlTM scheme is optimized for low output ripple voltage in PFM mode in order to reduce output noise to a minimum and features excellent AC load regulation. An open drain power good output indicates once the output voltage is in regulation.


  • Wide Input Voltage Range 3V to 17V
  • Input SVS (Supply Voltage Supervisor) with
    Adjustable Threshold / Hysteresis Consuming
    Typical 6µA Quiescent Current
  • Wide Output Voltage Range 1.2V to 10V
  • Typical 13 µA Quiescent Current
  • 350nA Typical Shutdown Current
  • Seamless Power Save Mode Transition
  • DCS-Control Scheme
  • Low Output Ripple Voltage
  • Up to 1MHz Switching Frequency
  • Highest Efficiency over Wide VIN
    and VOUT Range
  • Pin to Pin Compatible with TPS62160/70
  • 100% Duty Cycle Mode
  • Power Good Open Drain Output
  • Output Discharge Function
  • Small 2x2mm2 SON 8 pin Package

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Parametrics Evaluate all products in Step-Down (Buck) Converter

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Regulated Outputs (#) 1
Vin (Min) (V) 3
Vin (Max) (V) 17
Vout (Min) (V) 1.2
Vout (Max) (V) 10
Iout (Max) (A) 0.3
Iout2 (Max) (A) -
Vout2 (Min) (V) -
Vout2 (Max) (V) -
Topology Buck
Inverting Buck-Boost
  • Boost
  • Buck
  • Buck-Boost
  • Inverting Buck-Boost
Switching Frequency (Max) (kHz) 1000
Switch Current Limit (Typ) (A) 0.71
Iq (Typ) (mA) 0.013
Duty Cycle (Max) (%) 100
Soft Start Fixed
  • Adjustable
  • Fixed
  • None
Compensation Internal
  • External
  • Internal
  • Not Needed
Special Features Adjustable UVLO
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification
  • Adjustable Current Limit
  • Adjustable UVLO
  • Dynamic Voltage Scaling
  • Enable
  • Frequency Synchronization
  • Light Load Efficiency
  • Phase Interleaving
  • Power Good
  • Synchronous Rectification
  • Tracking
Control Mode -
  • COT with emulated ripple
  • Constant on-time (COT)
  • Current Mode
  • D-CAP
  • D-CAP+
  • D-CAP2
  • D-CAP3
  • Voltage Mode
Preset Vout (V) -
Vref Accuracy (Typ) (%) 2.5
Rating Catalog
  • Automotive
  • Catalog
  • HiRel Enhanced Product
  • High Temp
  • Military
  • Space
Operating Temperature Range (C) -40 to 85 °C to °C
Approx. Price (US$) 0.70 | 1ku
Package Group WSON
  • CFP
  • DDPAK/TO-263
  • MSOP-PowerPAD
  • PDIP
  • QFN
  • SO PowerPAD
  • SOIC
  • SON
  • SOT
  • SOT-23
  • TO-220
  • TO-263
  • USON
  • VQFN
  • VSON
  • WQFN
  • WSON
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    Min   Max   Range  
  Vin V    3.00 – 17.00V  
  Vout V    1.20 – 10.00V  
  Iout A    ≤ 0.3A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
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