Tiny Single-chip Dual Solution with 360nA Iq Buck and up to 15V Boost in WCSP


Product details


Vin (Min) (V) 2.5 Vin (Max) (V) 5.5 Vout (Min) (V) 1 Vout (Max) (V) 15 Iout (Max) (A) 0.3 Regulated outputs (#) 2 Switching frequency (Min) (kHz) 1200 Switching frequency (Max) (kHz) 2000 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Output Discharge, Over Current Protection, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode DCS-Control Duty cycle (Max) (%) 100 Type Converter Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

DSBGA (YFP) 16 0 mm² 1.622 x 1.622 open-in-new Find other Buck converters (integrated switch)


  • VIN Range 2.5 V to 5.5 V
  • 370 nA Iq Step-Down Converter
    • 8 Selectable Output Voltages (1.0V to 3.0V)
    • 300 mA Output Current
    • Output Discharge Function
  • Slew Rate Controlled Load Switch with Discharge
  • Dual Mode Step-Up Converter
    • Load Disconnect
    • Constant Output Voltage Adjustable up to 15 V
      (VFB 0.8 V) / 12 V Fixed
    • LED Current Driver with PWM to Current
      Conversion (max VFB Voltage 200 mV @ D =
  • Tiny 16pin 1.58 × 1.58mm WCSP Package 0.4mm
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The TPS62770 is a tiny power solution for wearable applications including a 370nA ultra low Iq step-down converter, a slew rate controlled load switch and a dual mode step-up converter. The output voltage of the step-down converter can be selected with three VSEL pins between 1.0 V, 1.05 V, 1.1 V, 1.2 V, 1.8 V, 1.9 V, 2.0 V and 3.0 V. The output voltage can be changed during operation. In shutdown mode, the output of the step-down converter is pulled to GND. The integrated load switch is internally connected to the output of the step-down converter and features slew rate control during turn on phase. Once turned off, its output is connected to GND.

The dual mode step-up converter can generate a constant output voltage up to 15 V, such as PMOLED supply; or, a constant output current, such as LED back light supply. The output voltage can be adjusted up to 15 V with external resistors, or set to fixed 12 V by connecting the FB pin to VIN. The device features an internal over voltage protection of 17.7 V in case the FB node is left open or tight to GND. It includes an internal rectifier and load disconnect function. When used as constant output current driver, the device offers a PWM to analog converter to scale down the reference voltage according to the duty cycle of the PWM signal.

The device is available in a small 16pin 0.4mm pitch WCSP package.

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Technical documentation

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Type Title Date
* Datasheet TPS62770 Multi-Rail DC/DC Converter For Wearable Applications datasheet (Rev. B) Apr. 11, 2016
White papers Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
Application notes Methods of output-voltage adjustment for DC/DC converters Jun. 14, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018
Application notes A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Application notes Testing tips for applying external power to supply outputs without an input volt Oct. 24, 2016
Technical articles Power wearable devices with multi-rail DC/DC converters Apr. 19, 2016
Selection guides DC/DC converters with DCS-Control topolgy selection guide (Rev. A) Mar. 17, 2016
User guides TPS62770EVM-734 Users Guide Mar. 10, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TPS62770EVM-734 is designed to help the users easily evalaute and test the operation and functionality of the TPS62770 Multi Rail DC/DC Converter. The EVM provides two independend power stage solutions, optimized for small solution as well as providing full feature set. The power stage provides (...)


  • 360nA Quiescent Current Step Down Converter
  • Tiny 16pin 1.65 x 1.65 mm WCSP package, 0.4mm pitch
  • Dual Mode Boost Converter
  • EVM provides multiple solutions

Design tools & simulation

SLVMBI1.ZIP (306 KB) - PSpice Model
SLVC780.ZIP (138 KB)

Reference designs

Tiny, ultra-low Iq DC-DC power supply with battery charging reference design for wearables
PMP21884 — A highly-integrated power supply reference design for smartwatches and fitness trackers enabling ultra-low Iq in an ultra-small (48sqmm) solution size. Supply includes seven power rails for the system including battery charger, LDO, DC-DC buck converters and integrated boost converter for heart rate (...)
document-generic Schematic document-generic User guide
Multi-Rail, Low Iq Power Reference Design for Wearable Applications
PMP9792 — Wearable applications like smart wristbands provide two main power rails to supply the wireless MCU, sensors, and the display. They are very tiny, and therefore require the smallest solution size possible. This reference design shows a full solution based on the TPS62770 multi-rail DC/DC converter (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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DSBGA (YFP) 16 View options

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