Battery Front-end DC/DC Converter, Synchronous Boost-bypass, 1S Li-Ion,Ni-Rich,Si-Anode


Product details


Vin (Min) (V) 2.3 Vin (Max) (V) 4.85 Vout (Min) (V) 2.85 Vout (Max) (V) 4.4 Switch current limit (Typ) (A) 5 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 2300 Switching frequency (Max) (kHz) 2300 Iq (Typ) (mA) 0.015 Features Bypass Mode Pass-through Mode, I2C Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Boost converters (integrated switch)

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  • 95% Efficiency at 2.3MHz Operation
  • 2µA Quiescent Current in Low IQ Pass-Through Mode
  • Wide VIN Range From 2.3V to 4.8V
  • IOUT ≥ 4A (Peak) at VOUT = 3.35V, VIN ≥ 2.65V
  • Integrated Pass-Through Mode (35mΩ)
  • Programmable Valley Inductor Current Limit and Output
  • Programmable Average Input Current Limit and Output
  • True Pass-Through Mode During Shutdown
  • Line and Load Transient
  • Low-Ripple Light-Load PFM Mode
  • In-Situ Customization with On-Chip E2PROM
    (Write Protect)
  • Two Interface Options:
    • I2C Compatible I/F up to 3.4Mbps (TPS61280)
    • Simple I/O Logic Control Interface (TPS6128x)
  • Thermal Shutdown and Overload Protection
  • Total Solution Size <20mm2, Sub 1-mm Profile
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The TPS6128x device provides a power supply solution for products powered by either by a Li-Ion, Nickel-Rich, Silicon Anode, Li-Ion or LiFePO4 battery. The voltage range is optimized for single-cell portable applications like in smart-phones or tablet PCs.

Used as a high-power pre-regulator, the TPS6128x extends the battery run-time and overcomes input current- and voltage limitations of the powered system.

While in shutdown, the TPS6128x operates in a true pass-through mode with only 2µA quiescent consumption for longest battery shelf life.

During operation, when the battery is at a good state-of-charge, a low-ohmic, high-efficient integrated pass-through path connects the battery to the powered system.

If the battery gets to a lower state of charge and its voltage becomes lower than the desired minimum system voltage, the device seamlessly transits into boost mode to utilize the full battery capacity.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS6128x Low-, Wide- Voltage Battery Front-End DC/DC Converter Single-Cell Li-Ion, Ni-Rich, Si-Anode Applications datasheet (Rev. A) Sep. 09, 2014
User guide TPS61280EVM-585 User's Guide (Rev. B) Apr. 02, 2018
Application note Calculating and Measuring the No Load Input Current of the Boost Converter Sep. 23, 2016
Technical articles TI Designs: Powering your EMI-compliant RFPA Apr. 04, 2014
Technical articles Don’t Crash Your Bus! Dec. 13, 2013

Design & development

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

Hardware development

The TPS61280EVM-585 Evaluation Module (EVM) demonstrates the Texas Instruments TPS61280 Low-, Wide- Voltage Battery Front-End DC/DC Converter with I2C interface. The EVM converts a 2.3V to 4.8V input voltage to a programmable, regulated Voltage in the range from 2.85V to 4.40V. The output voltage (...)
  • Wide VIN Range from 2.3V to 4.8V
  • Pass-Through Mode (35mOhm)
  • 95% Efficiency at 2.7MHz operation
  • I2C Programmable

Software development

SLVC543A.ZIP (511 KB)

Design tools & simulation

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

Battery Runtime Extension for GSM High Power Applications Reference Design
PMP9751 In this Reference Design, the TPS61280 Boost Converter with integrated Bypass Switch powers a Radio Frequency Power Amplifier (RFPA) in GSM Mode. The TPS61280 RFPA Combo Board enables longer battery runtime by applying a user defined minimum supply voltage for a Radio Frequency system. The whole (...)
document-generic Schematic

CAD/CAE symbols

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