28-V Output Voltage Boost Converter in WCSP Package


Product details


Vin (Min) (V) 1.8 Vin (Max) (V) 5.5 Vout (Min) (V) 4.5 Vout (Max) (V) 28 Switch current limit (Typ) (A) 0.9 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 850 Switching frequency (Max) (kHz) 1250 Iq (Typ) (mA) 0.11 Features Enable, Light Load Efficiency, Load Disconnect Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

DSBGA (YFF) 6 0 mm² 1.232 x .832 open-in-new Find other Boost converters (integrated switch)


  • Input Voltage Range: 1.8 V to 5.5 V, 1.6 V after
  • Output Voltage Up to 28 V
  • Integrated Power Diode and Isolation Switch
  • 900-mA (typical) Switch Current
  • Up to 85% Efficiency at 3.6-V Input and 12-V
  • 500-nA Ultra-low Shutdown Current
  • ±2% Output Voltage Accuracy
  • Power Save Operation Mode at Light Load
  • Internal 10-ms Soft Start Time
  • True Disconnection between Input and Output
    during Shutdown
  • Output Short Circuit Protection
  • Output Over-Voltage Protection
  • Thermal Shutdown Protection
  • 0.80-mm × 1.20-mm WCSP package
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The TPS61046 is a highly integrated boost converter designed for applications requiring high voltage and tiny solution size such as PMOLED panel and sensor module. The TPS61046 integrates a 30-V power switch, input/output isolation switch, and power diode. It can output up to 28 V from input of a Li+ battery or two cell alkaline batteries in series.

The TPS61046 operates with a switching frequency at 1.0 MHz. This allows the use of small external components. The TPS61046 has an internal default 12-V output voltage setting by connecting the FB pin to the VIN pin. Thus it only needs three external components to get 12-V output voltage. Together with WCSP package, the TPS61046 gives a very small overall solution size. The TPS61046 has typical 900-mA switch current limit. It has 10-ms built-in soft start time to minimize the inrush current. When the TPS61046 is in shutdown mode, the isolation switch disconnects the output from input to minimize the leakage current. The TPS61064 also implements output short circuit protection, output over-voltage protection and thermal shutdown.

The TPS61046 is available in a 6-pin 0.80-mm × 1.20-mm WCSP package.

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Technical documentation

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Type Title Date
* Data sheet TPS61046 28-V Output Voltage Boost Converter in WCSP Package datasheet Apr. 15, 2015
Technical article Do all rails need low Iq? Jul. 15, 2019
Application note AN-1112 DSBGA Wafer Level Chip Scale Package (Rev. AI) Jun. 14, 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Technical article Power a RS-485 transceiver with a high efficiency flyback converter Dec. 27, 2017
Application note Input Current Limit Solution for USB-Supplied Power System Aug. 03, 2017
Application note How to Select a Proper Inductor for Low Power Boost Converter Jun. 03, 2016
Application note Five Steps to a Good PCB Layout of the Boost Converter May 03, 2016
Test report Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) Apr. 14, 2016
Technical article A super-small, high-efficiency PMOLED reference design for wearables Jan. 20, 2016
Technical article Smaller size, higher efficiency for electronic point-of-sale thermal printers Oct. 07, 2015
User guide TPS61046 Evaluation Module User's Guide Apr. 28, 2015
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
Application note Automated Frequency Response Analyzer Oct. 09, 2013
Application note Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
Application note Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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Hardware development

document-generic User guide

This EVM is used to evaluate the 28V boost converter TPS61046, which is a highly integrated boost converter designed for applications requiring high voltage and tiny solution size such as PMOLED panel. There are two TPS61046 evaluation circuits in the EVM: one is adjustable VOUT version in which the (...)

  • 12V boost converter for PMOLED panel
  • 12 mm² solution size for 12V output power
  • Output Short circuit protection
  • Output over voltage protection


Design tools & simulation

SLVMB38A.ZIP (27 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Power Reference Design for a Wearable Device with Wireless Charging using the bq51003 and bq25120
PMP11311 Wearable devices require advanced power management to achieve long battery run times with always-on functionality.  Additionally, the devices need to use small rechargeable batteries and enable small footprint designs.  This application note shows the implementation of a scalable power (...)
document-generic Schematic
Ultrasonic Distance Measurement BoosterPack Reference Design
TIDA-00462 The TIDA-00462 ultrasonic distance measurement reference design can measure the distance up to 99 inches with an accuracy of ±1.5 inches. The scope of this design is to give you a head-start in integrating our industrial ultra-low-power MCU, analog signal conditioning and power (...)
document-generic Schematic
5 V-Output, 4000-V Isolated Power Supply Reference Design for RS485 Applications
PMP9801 — This reference design showcases a 5-V output, 4000-V isolated Flyback DC/DC converter for RS485 applications. Using the boost converter TPS61046, the circuit supports wide input voltage range and up to 250mA output current with 78% efficiency from a 10-V input. The reference design uses an adaptive (...)
document-generic Schematic
Smartwatch Battery Management Solution Reference Design
TIDA-00712 This reference design is for smartwatch battery management solution (BMS). It is suitable for low-power wearable devices like smartwatch applications. The design includes an ultra-low current 1 cell Li-ion linear charger; a highly integrated Qi-compliant wireless power receiver; a (...)
document-generic Schematic
Reference Design - PMOLED Display Power Supply with TPS61046
PMP9775 A PMOLED display is mostly used in the wearable device because of its low power consumption and low cost. This reference design is to demonstrate the TPS61046’s application in powering a PMOLED display. It includes a MCU MSP430G2230, boost converter TPS61046 and a 32 x 128 pixels PMOLED (...)
document-generic Schematic

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