28-V Output Voltage Boost Converter with Power Diode and Isolation Switch


Product details


Vin (Min) (V) 1.8 Vin (Max) (V) 5.5 Vout (Min) (V) 3.3 Vout (Max) (V) 28 Switch current limit (Typ) (A) 0.9 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 850 Switching frequency (Max) (kHz) 1250 Iq (Typ) (mA) 0.11 Features Enable, Light Load Efficiency, Load Disconnect Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other Boost converters (integrated switch)


  • Input voltage range: 1.8 V to 5.5 V, down to 1.6 V after start-up
  • Output voltage up to 28 V
  • Integrated power diode and isolation switch
  • 980-mA (typical) switch current
  • Up to 85% efficiency at 3.6-V input and 12-V output
  • ±2.5% output voltage accuracy
  • Power save operation mode at light load
  • Internal 7-ms soft start time
  • True disconnection between input and output during shutdown
  • Output short circuit protection
  • Output overvoltage protection
  • Thermal shutdown protection
  • 3-mm × 3-mm SOT23-6 package
  • Create a custom design using the TLV61046A with the WEBENCH Power Designer

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The TLV61046A is a highly-integrated boost converter designed for applications such as PMOLED panel, LCD bias supply, and sensor module. The TLV61046A integrates a 30-V power switch, an input to output isolation switch, and a rectifier diode. It can output up to 28 V from input of a Li+ battery or two alkaline batteries in series.

The TLV61046A operates with a switching frequency at 1.0 MHz. This allows the use of small external components. The TLV61046A has an internal default 12-V output voltage setting by connecting the FB pin to the VIN pin. Thus it only needs three external components to get 12-V output voltage. The TLV61046A has typical 980-mA switch current limit. It has 7-ms built-in soft start time to reduce the inrush current. When the TLV61046A is in shutdown mode, the isolation switch disconnects the output from input to minimize the leakage current. The TLV61046A also implements output short circuit protection, output overvoltage protection, and thermal shutdown.

The TLV61046A is available in a 6-pin 3-mm x 3-mm SOT23-6 package.

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Technical documentation

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Type Title Date
* Data sheet TLV61046A 28-V Output Voltage Boost Converter with Power Diode and Isolation Switch datasheet (Rev. B) Feb. 01, 2021
Application note How to Improve the Loading Capability of TLV61046A During Start-up Aug. 01, 2019
Technical article Power a RS-485 transceiver with a high efficiency flyback converter Dec. 27, 2017
Technical article Drive a piezoelectric buzzer with a simple boost converter Oct. 26, 2017
Application note Input Current Limit Solution for USB-Supplied Power System Aug. 03, 2017
User guide TLV61046AEVM User's Guide Apr. 26, 2017

Design & development

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Hardware development

document-generic User guide

The TLV61046AEVM helps to evaluate the electrical and thermal performance of the boost converter TLV61046A which integrates both a freewheeling diode and an isolation MOSFET. The external components of the TLV61046AEVM are selected to cover most of the normal applications. These components can be (...)

  • Output voltage up to 28 V
  • Operating input voltage from 1.8 V to 5.5 V
  • Integrating power diode and isolation MOSFET
  • Output short circuit protection
  • True disconnection between input and output during shutdown

Design tools & simulation

SLVMC06A.ZIP (110 KB) - PSpice Model
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 (...)
  • 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
  • (...)

Reference designs

5-V input, 4000-VAC isolation power supply reference design
TIDA-050032 This reference design introduces a 5-V, 200-mA output Flyback DC-DC power converter targeting RS485 application in data concentrator.

The 4000-VAC isolation power circuit is a simple and cost-effective solution as it uses a fully integrated converter TLV61046A and off-the-shelf transformer. The (...)

document-generic Schematic document-generic User guide
High Voltage, Cost Effective Piezoelectric Sounder Driver Reference Design
PMP15034 — Piezoelectric sounder are widely used in toys, timers, alarm and other electronic devices. Simple, cost-effective driver for the sounder is importance for these application fields. The PMP15034 introduces two drivers circuit based on the high voltage boost converter TLV61046A. The input voltage (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 6 View options

Ordering & quality

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