TPS63031

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High Efficient Single Inductor Buck-Boost Converter with 1-A Switches

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Product details

Parameters

Topology Buck-Boost Vin (Min) (V) 1.8 Vin (Max) (V) 5.5 Vout (Min) (V) 3.3 Vout (Max) (V) 3.3 Switch current limit (Typ) (A) 1 Duty cycle (Max) (%) 100 Features Enable, Frequency Synchronization, Light Load Efficiency, Load Disconnect, Synchronous Rectification, UVLO Fixed Switching frequency (Min) (kHz) 2200 Switching frequency (Max) (kHz) 2600 Type Converter Iq (Typ) (mA) 0.025 Rating Catalog Iout (Max) (A) 0.5 Operating temperature range (C) -40 to 85 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Package | Pins | Size

WSON (DSK) 10 6 mm² 2.5 x 2.5 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Features

  • Input voltage range: 1.8 V to 5.5 V
  • Fixed and adjustable output voltage options from 1.2 V to 5.5 V
  • Up to 96% efficiency
  • 800-mA Output current at 3.3 V in step-down mode (VIN = 3.6 V to 5.5 V)
  • Up to 500-mA output current at 3.3 V in boost mode (VIN > 2.4 V)
  • Automatic transition between step-down and boost mode
  • Device quiescent current less than 50 µA
  • Power-save mode for improved efficiency at low-output power
  • Forced fixed frequency operation and synchronization possible
  • Load disconnect during shutdown
  • Overtemperature protection
  • Available in a small 2.5-mm × 2.5-mm 10-pin VSON package (QFN)

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Description

The TPS6303x devices provide a power supply solution for products powered by either a two-cell or three-cell alkaline, NiCd or NiMH battery, or a one-cell Li-ion or Li-polymer battery. Output currents can go as high as 600 mA while using a single-cell Li-ion or Li-polymer battery, and discharge it down to 2.5 V or lower. The buck-boost converter is based on a fixed-frequency, pulse width modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low-load currents, the converter enters power-save mode to maintain high efficiency over a wide load current range. The power-save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The maximum average current in the switches is limited to a typical value of 1000 mA. The output voltage is programmable using an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is disconnected from the battery.

The TPS6303x devices operate over a free air temperature range of –40°C to 85°C. The devices are packaged in a 10-pin VSON package measuring 2.5-mm × 2.5-mm (DSK).

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Technical documentation

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Type Title Date
* Datasheet TPS6303x High Efficiency Single Inductor Buck-Boost Converter With 1-A Switches datasheet (Rev. D) Mar. 30, 2020
Application notes Layer Design for Reducing Radiated EMI of DC to DC Buck-Boost Converters Apr. 22, 2020
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application notes Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application notes Basic Calculations of a 4 Switch Buck-Boost Power Stage (Rev. B) Jul. 09, 2018
Application notes IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
Application notes Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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

Design tools & simulation

SIMULATION MODELS Download
SLVMBA5A.ZIP (63 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
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document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SON (DSK) 10 View options

Ordering & quality

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Videos

Lowering Noise in Battery Powered Applications with New Buck-Boost Mode Transition

This video shows how to avoid noise caused by mode changes common in battery powered applications when using buck-boost converters.

Posted: 30-Jan-2019
Duration: 04:40

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