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

TPS62125 (ACTIVE)

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

Description

The TPS62125 device is a high-efficiency synchronous step-down converter optimized for low and ultralow power applications providing up to 300-mA output current. The wide input voltage range of 3 V to 17 V supports 4-cell alkaline and 1- to 4-cell Li-Ion batteries in series configuration as well as 9-V to 15-V 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 power-down requirements. The enable comparator consumes only 6-µA quiescent current and features an accurate threshold of 1.2 V 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 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 pulse frequency modulation (PFM) mode and transitions seamlessly and automatically in pulse width modulation (PWM) mode at higher load currents. The DCS-Control™ 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.

Features

  • Wide Input Voltage Range 3 V to 17 V
  • Input Supply Voltage Supervisor (SVS) With
    Adjustable Threshold and Hysteresis Consuming
    Typical 6-µA Quiescent Current
  • Wide Output Voltage Range 1.2 V to 10 V
  • Typical 13-µA Quiescent Current
  • 350-nA Typical Shutdown Current
  • Seamless Power Save Mode Transition
  • DCS-Control™ Scheme
  • Low Output Ripple Voltage
  • Up to 1-MHz 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 2-mm × 2-mm 8-pin WSON Package

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

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Brand
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS62125 TPS62120 TPS62122
1     1     1    
3     2     2    
17     15     15    
1.2     1.2     1.2    
10     5.5     5.5    
0.3     0.075     0.075    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
1000        
0.71     0.25     0.25    
0.013     0.011     0.011    
100     100     100    
Fixed     Fixed     Fixed    
Internal     Internal     Internal    
Adjustable UVLO
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Synchronous Rectification    
DCS-Control     DCS-Control     DCS-Control    
2.5     2.5     2.5    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85    
8WSON     8SOT-23     6SON    
0.61 | 1ku     0.56 | 1ku     0.56 | 1ku    
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WEBENCH® TPS62125
    Min   Max   Range  
  Vin V 3.0 to 17.0V  
  Vout V 1.2 to 10.0V  
  Iout A ≤ 0.3A  
  Ambient Temp °C -40 to 85°C  
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