TPS63811

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2.5-A high-efficient buck-boost converter with I²C interface for dynamic voltage scaling

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Product details

Parameters

Topology Buck-Boost Vin (Min) (V) 2.2 Vin (Max) (V) 5.5 Vout (Max) (V) 5.2 Vout (Min) (V) 1.8 Duty cycle (Max) (%) 100 Features Dynamic Voltage Scaling, Enable, Light Load Efficiency, Load Disconnect, Output Discharge, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Fixed Switch current limit (Typ) (A) 5.8 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 3100 Iq (Typ) (mA) 0.013 Rating Catalog Iout (Max) (A) 2.5 Operating temperature range (C) -40 to 125 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Package | Pins | Size

DSBGA (YFF) 15 0 mm² 2.295 x 1.384 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Features

  • Input voltage range: 2.2 V to 5.5 V
  • Output voltage range: 1.8 V to 5.2 V
    • I2C-configurable during operation and shutdown
    • VSEL pin to toggle between two output voltage presets
  • Output current
    • Up to 2.5 A for VI ≥ 2.5 V, VO = 3.3 V
    • Up to 2.5 A for VI ≥ 2.8 V, VO = 3.5 V
  • High efficiency over entire load range
    • Low 13-µA operating quiescent current
    • Automatic power save mode and forced PWM mode (I2C-configurable)
  • Peak current mode buck-boost architecture
    • Defined transitions between buck, buck-boost and boost operation
    • Forward and reverse current operation
    • Start-up into pre-biased outputs
  • Safety and robust operation features
    • Integrated soft start
    • Overtemperature and overvoltage protection
    • True load disconnect during shutdown
    • Forward and backward current limit
  • Two device options:
    • TPS63810: Pre-programmed output voltages (3.3 V, 3.45 V)
    • TPS63811: Program output voltages prior to start-up
  • Solution size of < 20 mm2 with only four external components

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open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Description

The TPS63810 and TPS63811 are high efficiency, high output current buck-boost converters fully programmable through I2C. Depending on the input voltage, they automatically operate in boost, buck or in a novel 4-cycle buck-boost mode when the input voltage is approximately equal to the output voltage.

The transitions between modes happen at defined thresholds and avoid unwanted toggling within the modes to reduce output voltage ripple.

Two registers, accessible through I2C, set the output voltage, and a VSEL pin selects which output voltage register is active. Thus the devices can support dynamic voltage scaling. If the output voltage register is changed during operation or the VSEL pin is toggled, the device transits in a defined, programmable ramp-rate.

open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)
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Technical documentation

Design & development

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

Hardware development

EVALUATION BOARD Download
Description
The TPS63811EVM is designed to help the users easily evaluate and test the operation and functionality of the TPS63811 buck-boost converter. The EVM operates from input voltage between 2.2 V and 5.5 V, and can output voltage from 1.825 V to 5 V, with output current up to 2.5 A in buck mode and up to (...)
Features
  • Real buck, boost and buck-boost operation with automatic mode transition
  • I²C interface
  • High efficiency from 500 µA to 2.5 A output current
  • 13-μA typical supply current
  • True shutdown function with load disconnect and active output discharge
  • User selectable power save mode

Software development

SUPPORT SOFTWARE Download
SLVC782B.ZIP (43396 KB)
SUPPORT SOFTWARE Download
SLVC783B.ZIP (39135 KB)
SUPPORT SOFTWARE Download
SLVC784B.ZIP (44305 KB)

Design tools & simulation

SIMULATION TOOL Download
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 (...)
Features
  • 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
  • (...)
CALCULATION TOOL Download
SLVC808A.ZIP (1889 KB)

CAD/CAE symbols

Package Pins Download
DSBGA (YFF) 15 View options

Ordering & quality

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