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TPS62840 60 nA IQ, 1.8 V to 6.5 V Step-Down Converter

Texas Instruments' high-efficiency, 750 mA converters are ideal for use in wearable electronics

Image of Texas Instruments' TPS62840 Step-Down ConverterTexas Instruments' TPS62840 are high-efficiency step-down converters with ultra-low operating quiescent current of typically 60 nA. These devices contain special circuitry to achieve 150 nA IQ in 100%-mode to further extend battery life near the end of discharge.

The TPS62840 uses DCS-control™ to cleanly power radios and operates with a typical switching frequency of 1.8 MHz. In power-save-mode, the device extends the light-load efficiency down to a load current range of equal to or less than 1 µA.

These converters offer 16 predefined output voltages that can be selected by connecting a resistor to the VSET-pin, making the devices flexible for various applications with a minimum number of external components. The STOP-pin immediately eliminates switching noise in order to take a noise-free measurement in test and measurement systems.

The TPS6284x provides an output current of up to 750 mA. With an input voltage of 1.8 V to 6.5 V, the device supports multiple power sources such as 2S to 4S alkaline, 1S to 2S Li-MnO2, and 1S Li-Ion/Li-SoCl2.

Features
  • Operating quiescent current: 60 nA
  • 100% duty-cycle mode with 150 nA IQ
  • Input voltage range (VIN): 1.8 V to 6.5 V
  • Output current: up to 750 mA
  • RF-friendly DCS-control
  • 80% efficiency at 1 µA IOUT (3.6 VIN to 1.8 VOUT)
  • 16 selectable output voltages via VSET pin
  • Auto-transition PFM/PWM or forced-PWM mode
  • Selectable forced PWM and STOP modes
  • Output discharge function
  • Shutdown current: 20 nA
  • Packages: SON-8, WCSP-6, and HVSSOP-8
Applications
  • Smart meters and smart thermostats
  • Tracking devices
  • Wearable electronics
  • Medical sensor patches and patient monitors
  • Industrial IoT (smart sensors)
  • Test and measurement

TPS62840 Step-Down Converters

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
ULTRA LOW IQ BUCK CONVERTERTPS62840YBGRULTRA LOW IQ BUCK CONVERTER1603 - Immediate
10001 - Factory Stock
View Details
ULTRA LOW IQ BUCK CONVERTERTPS62840DLCRULTRA LOW IQ BUCK CONVERTER2727 - ImmediateView Details

Evaluation Boards

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
POWER MANAGEMENTTPS62840-1DLCEVM55POWER MANAGEMENT270 - Factory StockView Details
POWER MANAGEMENTTPS62840-1YBGEVM56POWER MANAGEMENT2 - Immediate
131 - Factory Stock
View Details
Published: 2019-10-17