5.5-V 4-A synchronous step-down converter with I²C interface in 1.5-mm x 2.5-mm QFN package


Product details


Vin (Min) (V) 2.4 Vin (Max) (V) 5.5 Vout (Min) (V) 0.4 Vout (Max) (V) 1.15 Iout (Max) (A) 4 Iq (Typ) (uA) 4 Switching frequency (Min) (kHz) 2400 Switching frequency (Max) (kHz) 2400 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, I2C/PMBus, Light Load Efficiency, Output Discharge, Over Current Protection, Power Good, Soft Start Fixed, Synchronous Rectification, UVLO Fixed, VID Interface Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RQY) 9 4 mm² 2.5 x 1.5 open-in-new Find other Buck converters (integrated switch)


  • 11-mΩ and 10.5-mΩ internal power MOSFETs
  • >90% efficiency (0.9-V output)
  • DCS-Control topology for fast transient response
  • Available output voltage ranges for dynamic voltage scaling (DVS) through I2C
    • Output voltage range from 0.2-V to 0.8375-V with 2.5-mV step size
    • Output voltage range from 0.4-V to 1.675-V with 5-mV step size
    • Output voltage range from 0.8-V to 3.35-V with 10-mV step size
  • 1% output voltage accuracy
  • 2.4-MHz switching frequency
  • Selection by external resistor
    • Start-up output voltage
    • I2C target address
  • Selection by I2C interface
    • Power save mode or forced PWM mode
    • Output discharge
    • Hiccup or latching short-circuit protection
    • Output voltage ramp speed
  • Thermal pre-warning and thermal shutdown
  • Power good indicator pin option with window comparator
  • I2C-compatible interface up to 3.4 Mbps
  • Available in 1.5-mm x 2.5-mm x 1.0-mm 9-pin QFN package with 0.5-mm pitch
  • Also available in WCSP package: TPS62866, 6-A synchronous step-down converter with I2C interface in 1.05-mm x 1.78-mm WCSP package
  • Create a custom design using with TPS62868/9 with the WEBENCH Power Designer
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The TPS62868 and TPS62869 devices are high-frequency synchronous step-down converters with I2C interface which provide an efficient, adaptive, and high power-density solution. At medium to heavy loads, the converter operates in PWM mode and automatically enters Power Save Mode operation at light load to maintain high efficiency over the entire load current range. The device can also be forced in PWM mode operation for smallest output voltage ripple. Together with its DCS-Control architecture, excellent load transient performance and tight output voltage accuracy are achieved. Through the I2C interface and a dedicated VID pin, the output voltage is quickly adjusted to adapt the power consumption of the load to the ever-changing performance needs of the application.

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Pin-for-pin with same functionality to the compared device.
NEW TPS62869 ACTIVE 5.5-V 6-A synchronous step-down converter with I²C interface in 1.5-mm x 2.5-mm QFN package Pin-to-pin 6-A version

Technical documentation

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Type Title Date
* Data sheet TPS62868x 2.4-V to 5.5-V Input, 4-A/6-A Synchronous Step-Down Converter with I2C Interface in QFN Package datasheet (Rev. B) Jul. 12, 2021
Application note Intro to Multi-function Pins and their Applications in TI Step-down Converters Jul. 27, 2021
Application note Benefiting from Step-Down Converters with an I²C Communication Interface May 17, 2021
White paper Enabling Higher Data Rates for Optical Modules With Small and Efficient Power Mar. 22, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

document-generic User guide
The TPS62869EVM-x (BSR118) evaluation module (EVM) facilitates the evaluation of the TPS62869 family of 6-A, step-down converter with DCS-Control in a small 1.5-mm by 2.5-mm QFN package solution. The EVM creates output voltages between 0.4 V and 1.675 V with 1% accuracy output voltages from higher (...)
  • 2.4-V to 5.5-V input voltage range
  • 0.4-V to 1.675-V programmable output voltage via I²C
  • 6-A output current

Design tools & simulation

SLVMDK2.ZIP (280 KB) - PSpice Model
SLVMDK3.ZIP (280 KB) - PSpice Model
SLVMDK4.ZIP (278 KB) - PSpice Model
SLVMDM8.ZIP (303 KB) - PSpice Model
SLVMDM9.ZIP (304 KB) - PSpice Model
SLVMDN0.ZIP (304 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
  • (...)

CAD/CAE symbols

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VQFN-HR (RQY) 9 View options

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