TPS61085

ACTIVE

18.5V, 2A, 650kHz / 1.2MHz Step-Up DC-DC Converter w/ Forced PWM Mode

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Product details

Parameters

Vin (Min) (V) 2.3 Vin (Max) (V) 6 Vout (Min) (V) 2.8 Vout (Max) (V) 18.5 Switch current limit (Typ) (A) 2.6 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 480 Switching frequency (Max) (kHz) 1500 Iq (Typ) (mA) 0.07 Features Enable Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

TSSOP (PW) 8 19 mm² 3 x 6.4 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Boost converters (integrated switch)

Features

  • 2.3 V to 6 V Input Voltage Range
  • 18.5-V Boost Converter With 2.0-A Switch Current
  • 650-kHz/1.2-MHz Selectable Switching Frequency
  • Adjustable Soft-Start
  • Thermal Shutdown
  • Undervoltage Lockout
  • 8-Pin VSSOP Package
  • 8-Pin TSSOP Package
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Description

The TPS61085 is a high frequency, high efficiency DC-DC converter with an integrated 2.0-A, 0.13-Ω power switch capable of providing an output voltage up to 18.5 V. The selectable frequency of 650 kHz or 1.2 MHz allows the use of small external inductors and capacitors and provides fast transient response. The external compensation allows optimizing the application for specific conditions. A capacitor connected to the soft-start pin minimizes inrush current at startup.

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Technical documentation

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Type Title Date
* Datasheet TPS61085 650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter datasheet (Rev. B) Dec. 15, 2014
Application notes Design of the Adjustable Vout Boost Circuit Dec. 06, 2019
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application notes Charging Supercapacitor Banks from USB Type C Port With Boost Converter Jul. 17, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes Extending the Soft Start Time Without a Soft Start Pin (Rev. B) Jun. 15, 2017
Application notes Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
Application notes AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C) Apr. 23, 2013
Application notes Low Cost 1W Isolated Power Supply Solution with TPS61085 Jun. 26, 2012
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application notes Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) Jan. 13, 2012
Application notes IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
User guides TPS61085EVM User's Guide (Rev. A) Oct. 22, 2010
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.

Hardware development

EVALUATION BOARDS Download
TPS61085 Evaluation Module
TPS61085EVM-355
document-generic User guide
$49.00
Description
The TPS61085EVM-355 facilitates evaluation of the TPS61085 650kHz/1.2MHz, 18.5V step-up DC-DC converter. Supplied from an 2.3V to 6V input voltage, the EVM generates an output voltage of 12V with a maximum switch current of 2.0A minimum.
Features
2.3V to 6V Input Voltage Range 18.5V Boost Converter With 2.0A Switch Current 650kHz/1.2MHz Selectable Switching Frequency Adjustable Soft-Start Thermal Shutdown Undervoltage Lockout

Design tools & simulation

SIMULATION MODELS Download
SLIM133B.ZIP (50 KB) - PSpice Model
SIMULATION MODELS Download
SLVM553.TSC (546 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM554.ZIP (26 KB) - TINA-TI Spice Model

Reference designs

REFERENCE DESIGNS Download
Industrial Communications Gateway PROFINET IRT to PROFIBUS Master Reference Design
TIDEP-0075 — PROFINET is becoming the leading industrial Ethernet protocol in automation due to its high-speed, deterministic communications and enterprise connectivity. However, as the world’s most popular fieldbus, PROFIBUS’s importance and usage will continue for many years due to legacy (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
OPC UA Data Access Server for AM572x Reference Design
TIDEP0078 — OPC UA is an industrial machine-to-machine protocol designed to allow interoperability and communication between all machines connected under Industry 4.0. The TIDEP0078 TI Design demonstrates use of the MatrikonOPC™ OPC UA server development kit (SDK) to allow communications using an OPC UA (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
LCD Bias Power Reference Design
PMP9770 This reference design delivers a low cost LCD bias power circuit using the boost converter IC TPS61085. The solution provides all four voltages required by the thin film transistor (TFT) LCD display. The TPS61085 boost converter generates the AVDD voltage. Two external charge pump circuits provide (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

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