TPS61021A

ACTIVE

3-A Boost Converter with 0.5-V Ultra Low Input Voltage

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Product details

Parameters

Vin (Min) (V) 0.5 Vin (Max) (V) 4.4 Vout (Min) (V) 1.8 Vout (Max) (V) 4 Switch current limit (Typ) (A) 4.3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 2000 Iq (Typ) (mA) 0.017 Features Enable, Light Load Efficiency, Load Disconnect, Synchronous Rectification Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 125 Type Converter Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

WSON (DSG) 8 4 mm² 2 x 2 open-in-new Find other Boost converters (integrated switch)

Features

  • Input Voltage Range: 0.5 V to 4.4 V
  • 0.9 V Minimum Input Voltage for Startup
  • Output Voltage Setting Range: 1.8 V to 4.0 V
  • 91% Efficiency at VIN = 2.4 V, VOUT = 3.3 V and
    IOUT = 1.5 A
  • 2.0-MHz Switching Frequency
  • IOUT > 1.5 A at VOUT = 3.3 V when VIN > 1.8 V
  • 17-µA Typical Quiescent Current
  • ±2.5% Reference Voltage Accuracy over –40°C to
    125°C
  • PFM Operation Mode at Light Load
  • True Disconnection Between Input and Output
    During Shutdown
  • Output Over Voltage Protection
  • Output Short Circuit Protection
  • Thermal Shutdown Protection
  • 2-mm × 2-mm WSON Package
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Description

The TPS61021A provides a power supply solution for portable or smart devices powered by alkaline, NiMH, Li-Mn, or Li-ion batteries. The TPS61021A is capable of outputting 3.3-V voltage and 1.5-A current from a battery discharged to as low as 1.8 V. Capable of operating with 0.5-V input voltage enables the TPS61021A to extend the battery run time.

The TPS61021A operates at 2-MHz switching frequency at heavy load and enters power-save mode at light load to maintain high efficiency over the entire load current range. The device only consumes a 17-µA quiescent current from VOUT in light load condition. During shutdown, the load is completely disconnected from the input. In addition, The TPS61021A provides 4.35-V output overvoltage protection, output short circuit protection, and thermal shutdown protection.

The TPS61021A offers a very small solution size due to low count of external components. It allows the use of small inductors and output capacitors with the 2-MHz switching frequency.

The TPS61021A is available in 2.0-mm × 2.0-mm WSON package.

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Technical documentation

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Type Title Date
* Datasheet TPS61021A 3-A Boost Converter with 0.5-V Ultra Low Input Voltage datasheet Jun. 01, 2016
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Technical articles How energy harvesting can extend the life of your fault indicator on the grid Oct. 18, 2017
Application notes Single LED Driver in AA Battery-Powered Systems Aug. 25, 2017
Selection guides Low-Power DC/DC Converter Overview Guide (Rev. D) Feb. 09, 2017
Application notes Feedforward Capacitor Makes Boost Converter Fast and Stable Nov. 02, 2016
User guides TPS61021A-PWR723 Evaluation Module (Rev. A) Jun. 16, 2016
Application notes Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application notes Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep. 19, 2011
Application notes IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
Application notes Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The TPS61021A provides a power supply solution for portable devices and IoT devices powered by alkaline battery or LiMn battery. The TPS61021A supports up to 1.5A load current from a battery discharged as low as 1.8V. The TPS61021A operates at a regulated 2.0-MHz switching frequency and enters (...)
Features
  • 0.9-3.6V input voltage range
  • Up to 90% efficiency at VIN = 2.4V, VOUT = 3.3V, and IOUT = 1.5A
  • 2.0-MHz Switching Frequency
  • 30-µA Quiescent Current
  • True disconnection between input and Output during shut down

Design tools & simulation

SIMULATION MODELS Download
SLVMBI5B.ZIP (97 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Energy Harvesting from Current Transformer with Super Capacitor for Fault Indicator Reference Design
TIDA-01385 — Power management for the energy harvesting, energy buffering and back-up power is a key challenge in the fault indicator design. The TIDA-01385 introduces a circuit about harvesting energy from a current transformer for the system load of a fault indicator while storing the extra energy in a super (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Energy Harvesting and Fault Indicator Subsystem for Overhead Fault Indicators Reference Design
TIDA-00998 — The TIDA-00998 TI Design shows multiple architectures for extending primary battery life using a secondary battery or supercapacitor with energy harvested from a current transformer (CT) or solar cells. Optimal Power management is done using efficient LED Drivers to drive series or parallel strings (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Power Stage Reference Design for Power Stealing Thermostat
TIDA-01574 — This TI Design provides a reference design for low cost high efficiency power stealing for low cost smart thermostats and other building automation equipment. In general, power stealing enables to extend battery life of Wi-Fi enabled smart thermostats by drawing power from 24-V AC when the HVAC load (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High Brightness Single LED Driver Reference Design for 1- to 2-Cell AA Battery Applications
PMP15037 — This reference design delivers a high efficiency LED driver circuit with dimming function using the boost converter TPS61021A. The PWM dimming method can be used in one or two cell AA battery input applications, and the analog dimming method can be used in one cell AA battery input applications (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
0.8V-4.2Vin to 3.3V@100mA Boost+Buck Reference Design
PMP21055 — The PMP21055 reference design converts a 0.8V to 4.2V input to a 3.3V/100mA output in a small form factor measuring 12mmx8mm. The design is built on a 2 layer, 1oz board and is a low-cost, small size design intended for battery powered applications. 
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Power Supply Reference Design for GPRS Modems using LiSoCL2 Batteries
TIDA-01387 — This design demonstrates how to power GPRS modems in smart meters using LiSoCL2 batteries. GPRS modems require peak current of up to 2A during transmission. This design reduces the peak load requirements on the battery by using the TPS61021A boost converter and a 20F super capacitor to provide the (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSG) 8 View options

Ordering & quality

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Videos

Power Tips: Layout for a Boost Power Stage

This video shows a simplified schematic and PCB layout for a boost converter

Posted: 21-Jan-2016
Duration: 04:31

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