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AC/DC & DC/DC converters (integrated FET)

TPS61085

ACTIVE

18.5-V, 2-A, 650-kHz / 1.2-MHz step-up DC/DC converter

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Data sheet

TPS61085

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.3 Vin (max) (V) 6 Switching frequency (min) (kHz) 480 Switching frequency (max) (kHz) 1500 Features Enable, Nonsynchronous Vout (min) (V) 2.8 Vout (max) (V) 18.5 Iq (typ) (µA) 70 Duty cycle (max) (%) 90 Switch current limit (typ) (A) 2.6
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.3 Vin (max) (V) 6 Switching frequency (min) (kHz) 480 Switching frequency (max) (kHz) 1500 Features Enable, Nonsynchronous Vout (min) (V) 2.8 Vout (max) (V) 18.5 Iq (typ) (µA) 70 Duty cycle (max) (%) 90 Switch current limit (typ) (A) 2.6
TSSOP (PW) 8 19.2 mm² 3 x 6.4 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • 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
  • 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

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.

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
* Data sheet TPS61085 650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter datasheet (Rev. B) PDF | HTML 15 Dec 2014
Application note 스트컨버터의 전력계 기본 계산 (Rev. D) PDF | HTML 21 Nov 2022
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 28 Oct 2022
Application note Using External Bias to Broaden Input Voltage Range of Boost Converters PDF | HTML 08 Nov 2021
Application note Design of the Adjustable Vout Boost Circuit 06 Dec 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Application note Charging Supercapacitor Banks from USB Type C Port With Boost Converter 17 Jul 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15 Jun 2017
Application note AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C) 23 Apr 2013
Application note Low Cost 1W Isolated Power Supply Solution with TPS61085 26 Jun 2012
Analog Design Journal Design considerations for a resistive feedback divider in a DC/DC converter 26 Apr 2012
Application note Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) 13 Jan 2012
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011
EVM User's guide TPS61085EVM User's Guide (Rev. A) 22 Oct 2010
Application note Minimizing Ringing at the Switch Node of a Boost Converter 15 Sep 2006

Design & development

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

Evaluation board

TPS61085EVM-355 — TPS61085 Evaluation Module

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.
User guide: PDF
Not available on TI.com
Simulation model

TPS61085 TINA-TI Transient Reference Design

SLVM553.TSC (546 KB) - TINA-TI Reference Design
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Simulation model

TPS61085 TINA-TI Transient Spice Model

SLVM554.ZIP (26 KB) - TINA-TI Spice Model
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Simulation model

TPS61085 Unencrypted PSpice Transient Model Package (Rev. B)

SLIM133B.ZIP (50 KB) - PSpice Model
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Design guide: PDF
Schematic: PDF
Reference designs

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Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
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