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

TPS62590 (ACTIVE)

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

Description

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.

Features

  • 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
  • APPLICATIONS
    • Portable Handheld
    • WLAN
    • Low Power DSP Supply
    • POL

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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
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS62590
1    
2.5    
5.5    
0.75    
5.5    
1    
Buck    
2500    
1.4    
0.015    
100    
Fixed    
Internal    
Enable
Light Load Efficiency
Synchronous Rectification    
Voltage Mode    
2.5    
Catalog    
-40 to 85    
6SON    
0.75 | 1ku    

Other qualified versions of TPS62590

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

Featured tools and software

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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