Integrated Power Solution, 3W High-Efficiency boost converter module in MicroSiP™ package


Product details


Iout (Max) (A) 0.7 Vin (Min) (V) 2.5 Vin (Max) (V) 5.5 Output voltage (Min) (V) 5 Output voltage (Max) (V) 5 Switching frequency (Typ) (kHz) 4000 Shutdown current (Typ) (uA) 0.85 Regulated outputs (#) 1 Features Enable, Input/Output Isolation Operating temperature range (C) -40 to 85 open-in-new Find other Boost modules (integrated inductor)


  • 91% Efficiency at 4MHz Operation
  • Wide VIN Range From 2.5V to 5.5V
  • IOUT ≥550mA at VOUT = 5.0V, VIN ≥3.3V
  • Fixed Output Voltage 5.0V
  • ±2% Total DC Voltage Accuracy
  • 43µA Supply Current
  • Best-in-Class Line and Load Transient
  • VIN ≥ VOUT Operation
  • Low-Ripple Light-Load PFM Mode
  • True Load Disconnect During Shutdown
  • Thermal Shutdown and Overload Protection
  • Sub 1-mm Profile Solution
  • Total Solution Size <9mm2
  • 9-Pin MicroSiP Packaging

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The TPS81256 device is a complete MicroSiP DC/DC step-up power solution intended for battery-powered portable applications. Included in the package are the switching regulator, inductor and input/output capacitors. Only a tiny additional output capacitor is required to finish the design.

The TPS81256 is based on a high-frequency synchronous step-up DC/DC converter optimized for battery-powered portable applications.

The DC/DC converter operates at a regulated 4-MHz switching frequency and enters power-save mode operation at light load currents to maintain high efficiency over the entire load current range.

The PFM mode extends the battery life by reducing the supply current to 43µA (typical) during light load operation. Intended for low-power applications, the TPS81256 supports more than 3W output power over a full Li-Ion battery voltage range. Input current in shutdown mode is less than 1µA (typical), which maximizes battery life.

The TPS81256 offers a very small solution size of less than 9mm2 due to minimum amount of external components. The solution is packaged in a compact (2.6mm x 2.9mm) and low profile (1.0mm) BGA package suitable for automated assembly by standard surface mount equipment.

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Technical documentation

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Type Title Date
* Data sheet TPS81256 3-W, High Efficiency Step-Up Converter In MicroSiP Packaging datasheet (Rev. D) Feb. 02, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Selection guide Innovative DC/DC Power Modules Selection Guide (Rev. C) Feb. 27, 2018
User guide TPS8125xEVM Apr. 13, 2012
User guide MicroSiP™ Design Guide Feb. 22, 2011

Design & development

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Hardware development

document-generic User guide

The TPS81256EVM-121 enables test and evaluation of Texas Instruments' TPS81256 devices, a series of 4.5-MHz, step-up DC-DC converters. This user's guide includes EVM specifications, a schematic diagram, a bill of materials, and board layout images. The TPS81256 device is an ideal power-supply (...)

  • 91% Efficiency at 4.5 MHz
  • VIN Range from 2.50 V to 4.85 V
  • 0.85 μA Quiescent Current in Shutdown Mode
  • 30 μA Quiescent Current in Normal Operation
  • VIN > VOUT operation for Vin up to 5.5V

Design tools & simulation

SLVM607A.ZIP (46 KB) - PSpice Model
SLVM725.ZIP (52 KB) - TINA-TI Spice Model
SLVM726.TSC (115 KB) - TINA-TI Reference Design
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

DLP Ultra-mobile NIR Spectrometer for Portable Chemical Analysis with Bluetooth Connectivity
TIDA-00554 The ultra-mobile near-infrared (NIR) spectrometer reference design utilizes Texas Instruments' DLP technology in conjunction with a single-element InGaAs detector to deliver high performance measurements in a portable form factor that is more affordable than architectures using an expensive InGaAs (...)
document-generic Schematic document-generic User guide
Design files

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Ordering & quality

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