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TPS62770

ACTIVE

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

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Data sheet

TPS62770

ACTIVE
Data sheet Order now

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 Iq (typ) (mA) 0.00037 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 Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 2 Control mode DCS-Control Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (min) (V) 1 Vout (max) (V) 15 Iout (max) (A) 0.3 Iq (typ) (mA) 0.00037 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 Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 2 Control mode DCS-Control Duty cycle (max) (%) 100 Type Converter
DSBGA (YFP) 16 3.24 mm² 1.8 x 1.8
  • 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
    Function
  • 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 =
      100%)
  • Tiny 16pin 1.58 × 1.58mm WCSP Package 0.4mm
    pitch
  • 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
    Function
  • 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 =
      100%)
  • Tiny 16pin 1.58 × 1.58mm WCSP Package 0.4mm
    pitch

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.

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
* Data sheet TPS62770 Multi-Rail DC/DC Converter For Wearable Applications datasheet (Rev. B) PDF | HTML 11 Apr 2016
More literature Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 May 2022
More literature Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 14 Oct 2019
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
Analog Design Journal Testing tips for applying external power to supply outputs without an input volt 24 Oct 2016
Technical article Power wearable devices with multi-rail DC/DC converters 19 Apr 2016
EVM User's guide TPS62770EVM-734 Users Guide 10 Mar 2016

Design & development

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

Evaluation board

TPS62770EVM-734 — TPS62770 Multi-Rail DC/DC Converter Evaluation Module

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 (...)

User guide: PDF
Not available on TI.com
Simulation model

TPS62770 PSpice Unencrypted Transient Model (Rev. A)

SLVMBI1A.ZIP (280 KB) - PSpice Model
Download
Calculation tool

Design Tool for Output Voltage Adjustment Using a DAC

SLVC780.ZIP (138 KB)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

PMP21884 — Tiny, ultra-low IQ DC/DC power supply with battery charging reference design for wearables

This is a highly-integrated power supply reference design for smartwatches and fitness trackers enabling ultra-low IQ that is ultra-small (48 sq mm). Supply includes seven power rails including battery charger, LDO, DC/DC buck converters and integrated boost converter for heart rate monitor, AFE (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP9792 — Multi-Rail, Low Iq Power Reference Design for Wearable Applications

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 (...)
Test report: PDF
Schematic: PDF
Package Pins Download
DSBGA (YFP) 16 View options

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