2.25MHz, 1A Step-Down Converter in 2 x 2 SON Package - TPS62590


2.25MHz, 1A Step-Down Converter in 2 x 2 SON Package


The TPS62590 device is a high efficiency synchronous step down converter, optimized for battery powered portable applications. It provides up to 1000-mA output current from batteries, such as single Li-Ion or other common chemistry AA and AAA cells.

With an input voltage range of 2.5 V to 5.5 V, the device is targeted to power a large variety of portable handheld equipment or POL applications.

The TPS62590 family operates at 2.25-MHz fixed switching frequency and enters a Power Save Mode operation at light load currents to maintain a high efficiency over the entire load current range.

The Power Save Mode is optimized for low output voltage ripple. For low noise applications, the device can be forced into fixed frequency PWM mode by pulling the MODE pin high. In the shutdown mode the current consumption is reduced to less than 1 µA. The TPS62590 allows the use of small inductors and capacitors to achieve a small solution size.

The TPS62590 is available in a 2-mm × 2-mm 6-pin QFN package.


  • Output Current up to 1000 mA
  • Input Voltage Range from 2.5 V to 5.5 V
  • Output Voltage Accuracy in PWM mode ±2.5%
  • Typ. 15-µA Quiescent Current
  • 100% Duty Cycle for Lowest Dropout
  • Available in a 2 × 2 × 0.8 mm QFN Package
  • For Improved Features Set, See TPS62290
    • Portable Handheld
    • WLAN
    • Low Power DSP Supply
    • POL

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

  TPS62590 Compare
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Regulated Outputs (#) 1
Vin (Min) (V) 2.5
Vin (Max) (V) 5.5
Vout (Min) (V) 0.75
Vout (Max) (V) 5.5
Iout (Max) (A) 1
Iout2 (Max) (A) -
Vout2 (Min) (V) -
Vout2 (Max) (V) -
Topology Buck
  • Boost
  • Buck
  • Buck-Boost
  • Inverting Buck-Boost
Switching Frequency (Max) (kHz) 2500
Switch Current Limit (Typ) (A) 1.4
Iq (Typ) (mA) 0.015
Duty Cycle (Max) (%) 100
Soft Start Fixed
  • Adjustable
  • Fixed
  • None
Compensation Internal
  • External
  • Internal
  • Not Needed
Special Features Enable
Light Load Efficiency
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 Voltage 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$) 0.79 | 1ku
Package Group SON
  • 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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Other qualified versions of TPS62590

Version Part Number Definition
Automotive TPS62590-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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Companion parts

Part # Name Product Family Comments
ADS4149   14 bit 250MSPS Low Power ADC   ANALOG TO DIGITAL CONVERTER - HIGH SPEED ADC (>10MSPS)    The ADS4149 14-bit, 250MSPS ADC power supply solution can be designed using the TPS62590 1000mA, 2.25MHz Step-Down Converter. The resulting efficiency in the step down from 3.3V source to the 1.8V supply required by the ADC is ~91%, with only 0.3dB SNR degradation in ADC performance at high IF, compared to an LDO based power design. An LDO, with an expected efficiency of only 55%, is therefore not required to source this high performance ADC. For further enhanced performance check also TPS62293  
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