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
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
DSBGA (YFF) 16 0 mm² 1.706 x 1.706
  • 95% Efficiency at 2.3MHz Operation
  • 3µA 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 Voltage
  • True Pass-Through Mode During Shutdown
  • Best-in-Class Line and Load Transient
  • Low-Ripple Light-Load PFM Mode
  • In-Situ Customization with On-Chip E2PROM (Write Protection)
  • Two Interface Options:
    • I2C Compatible I/F up to 3.4Mbps (TPS61280A)
    • Simple I/O Logic Control Interface (TPS6128xA)
  • Thermal Shutdown and Overload Protection
  • Total Solution Size < 20mm2, Sub 1-mm Profile
  • 95% Efficiency at 2.3MHz Operation
  • 3µA 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 Voltage
  • True Pass-Through Mode During Shutdown
  • Best-in-Class Line and Load Transient
  • Low-Ripple Light-Load PFM Mode
  • In-Situ Customization with On-Chip E2PROM (Write Protection)
  • Two Interface Options:
    • I2C Compatible I/F up to 3.4Mbps (TPS61280A)
    • Simple I/O Logic Control Interface (TPS6128xA)
  • Thermal Shutdown and Overload Protection
  • Total Solution Size < 20mm2, Sub 1-mm Profile

The TPS6128xA 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 TPS6128xA extends the battery run-time and overcomes input current- and voltage limitations of the powered system.

While in shutdown, the TPS6128xA operates in a true pass-through mode with only 3µA 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 uses the full battery capacity.

TPS6128xA device supports more than 4A pulsed load current even from a deeply discharged battery. In this mode of operation, the TPS6128xA enables the utilization of the full battery capacity: A high battery-cut-off voltage originated by powered components with a high minimum input voltage is overcome; new battery chemistries can be fully discharged; high current pulses forcing the system into shutdown are buffered by the device seamlessly transitioning between boost and by-pass mode back and forth.

This has significant impact on the battery on-time and translates into either a longer use-time and better user-experience at an equal battery capacity or into reduced battery costs at similar use-times.

The TPS6128xA offers a small solution size (< 20mm2) due to minimum amount of external components, enabling the use of small inductors and input capacitors, available as a 16-pin chip-scale package (CSP).

The TPS6128xA operates in synchronous, 2.3MHz boost mode and enters power-save mode operation (PFM) at light load currents to maintain high efficiency over the entire load current range.

The TPS6128xA 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 TPS6128xA extends the battery run-time and overcomes input current- and voltage limitations of the powered system.

While in shutdown, the TPS6128xA operates in a true pass-through mode with only 3µA 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 uses the full battery capacity.

TPS6128xA device supports more than 4A pulsed load current even from a deeply discharged battery. In this mode of operation, the TPS6128xA enables the utilization of the full battery capacity: A high battery-cut-off voltage originated by powered components with a high minimum input voltage is overcome; new battery chemistries can be fully discharged; high current pulses forcing the system into shutdown are buffered by the device seamlessly transitioning between boost and by-pass mode back and forth.

This has significant impact on the battery on-time and translates into either a longer use-time and better user-experience at an equal battery capacity or into reduced battery costs at similar use-times.

The TPS6128xA offers a small solution size (< 20mm2) due to minimum amount of external components, enabling the use of small inductors and input capacitors, available as a 16-pin chip-scale package (CSP).

The TPS6128xA operates in synchronous, 2.3MHz boost mode and enters power-save mode operation (PFM) at light load currents to maintain high efficiency over the entire load current range.

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Technical documentation

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Type Title Date
* Data sheet TPS6128xA Low-, Wide- Voltage Battery Front-End DC/DC Converter Single-Cell Li-Ion, Ni-Rich, Si-Anode Applications datasheet (Rev. B) 14 Nov 2014
Technical article How to use a boost bypass as the pre-regulator in a smartphone 03 Aug 2017
Application note Choosing the Boost With Bypass or Pass Through 27 Jun 2017
Application note Five Steps to a Good PCB Layout of the Boost Converter 03 May 2016

Design & development

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Evaluation board

TPS61280EVM-585 — Low-, Wide- Voltage Battery Front-End DC/DC Converter with I2C interface Evaluation Module

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 (...)
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DSBGA (YFF) 16 View options

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