TPS61045

ACTIVE

28-V, 85% Efficient Boost Converter in QFN-8, Digitally Adjustable

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Product details

Parameters

Vin (Min) (V) 1.8 Vin (Max) (V) 6 Vout (Min) (V) 1.8 Vout (Max) (V) 28 Switch current limit (Typ) (A) 0.3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 0.04 Features Enable, Load Disconnect Duty cycle (Max) (%) 88 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

VSON (DRB) 8 9 mm² 3.0 x 3.0 open-in-new Find other Boost converters (integrated switch)

Features

  • Input Voltage Range from 1.8 to 6 V
  • Output Voltage of up to 28 V Possible
  • Up to 85% Efficiency
  • Digitally Adjustable Output Voltage Control
  • Disconnects Output From Input During Shutdown
  • Switching Frequency up to 1 MHz
  • No Load Quiescent Current 40 µA Typical
  • Thermal Shutdown Mode
  • Shutdown Current 0.1 µA Typical
  • Available in Small 3-mm × 3-mm VSON Package
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Description

The TPS61045 device is a high-frequency boost converter with digitally-programmable output voltage and true shutdown. During shutdown, the output is disconnected from the input by opening the internal input switch. This allows a controlled power-up and power-down sequencing of the display. The output voltage can be increased or decreased in digital steps by applying a logic signal to the CTRL pin. The output voltage range, as well as the output voltage step size, can be programmed with the feedback divider network. With a high switching frequency of up to 1 MHz, the TPS61045 device allows the use of small external components, and together, with the small 8-pin VSON package, a minimum system solution size is achieved.

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Similar but not functionally equivalent to the compared device:
TPS61046 ACTIVE 28-V Output Voltage Boost Converter in WCSP Package For applications requiring smaller package or true disconnection.

Technical documentation

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Type Title Date
* Datasheet TPS61045 Digitally Adjustable Boost Converter datasheet (Rev. C) Dec. 05, 2014
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) Nov. 29, 2017
Application notes Extending the Soft Start Time Without a Soft Start Pin (Rev. B) Jun. 15, 2017
Application notes Feedforward Capacitor Makes Boost Converter Fast and Stable Nov. 02, 2016
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
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
User guides TPS61045EVM-231: Adjustable LCD Boost Converter EVM Jan. 22, 2003
Application notes High Voltage Power Supply Using the TPS61040 Jul. 09, 2002

Design & development

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Hardware development

EVALUATION BOARDS Download
TPS61045 Evaluation Module
TPS61045EVM-231
document-generic User guide
49
Description

The TPS61045EVM-231 is an evaluation tool for the TPS61045 inductive boost converter in 3x3mm2 QFN that can supply voltages up to 28V from input voltages in the range of 1.8V to 6V. The EVM is configured to supply a highly efficient, digitally adjustable, 18-V output for LCD bias supplies. This EVM (...)

Design tools & simulation

SIMULATION MODELS Download
SLVM359A.ZIP (41 KB) - PSpice Model
SIMULATION MODELS Download
SLVMD16.ZIP (92 KB) - SIMPLIS Model
SIMULATION TOOLS 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
  • (...)

CAD/CAE symbols

Package Pins Download
SON (DRB) 8 View options

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