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TPS61040DBVR

28V 400mA boost converter, 1.8-6V in, 1MHz, 28μA Iq, SOT-23-5

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Manufacturer Part：

TPS61040DBVR

Package：

SOT-23-5 / DBV (2.9 x 1.6 x 1.15mm)

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Description

Product Overview

The TPS61040DBVR from Texas Instruments is a 28V, 400mA switch boost converter in a SOT-23-5 package. Designed for LCD bias supply and white LED backlight applications, it operates from 1.8V to 6V input with up to 1MHz switching frequency, enabling compact solution size with small external components.

Key Specifications

Input Voltage Range 1.8V to 6V
Output Voltage Range Up to 28V
Internal Switch Current Limit 400mA
Switching Frequency Up to 1MHz
Quiescent Current 28μA typ.
Shutdown Current 1μA typ.
Internal Soft Start Yes
Package SOT-23-5 (2.9 x 1.6mm)
Operating Temperature -40°C to +125°C

Features

  • 1.8V to 6V input voltage range
  • Adjustable output up to 28V
  • 400mA internal switch current limit
  • Up to 1MHz switching frequency for small inductors
  • 28μA typical no-load quiescent current
  • 1μA shutdown current
  • Internal soft start limits inrush current
  • Available in SOT-23-5 and WSON packages
  • Supports ceramic and tantalum output capacitors

Applications

  • White LED backlight for small to medium LCDs
  • LCD bias supply generation
  • 3.3V or 5V to 12V boost conversion
  • Battery-powered portable equipment
  • OLED display power supplies

The TPS61040DBVR from Texas Instruments is a high-frequency boost converter dedicated for small to medium LCD bias supply and white LED backlight applications. Operating from 1.8V to 6V input, it generates output voltages up to 28V, making it ideal for dual-cell NiMH/NiCd or single-cell Li-Ion battery powered systems. The 1MHz switching frequency allows the use of small external components, while the 28μA quiescent current and optimized control scheme enable high efficiency over the entire load range.

The TPS61040 uses a current-mode pulse-frequency modulation (PFM) control scheme. When the output voltage drops below the regulation threshold set by the external resistor divider, the internal N-channel MOSFET switch turns on, storing energy in the external inductor. When the switch turns off, the inductor current flows through the external Schottky diode to the output capacitor and load. The device operates in discontinuous conduction mode (DCM) at light loads for high efficiency. The internal soft start gradually increases the switch current limit during startup to prevent excessive inrush current.

Pin Name Type Function
1 SW Power Switch pin (connect to inductor and Schottky diode)
2 GND Power Ground
3 FB Input Feedback voltage input (set output via resistor divider)
4 EN Input Enable input (high = on, low = shutdown)
5 VIN Power Input supply voltage (1.8V to 6V)
  • White LED backlight driver for 2.8-7 inch LCD panels
  • LCD positive and negative bias voltage generation
  • Single-cell Li-Ion to 12V boost for portable devices
  • OLED display power supply from battery input
  • 3.3V to 5V or 12V step-up conversion in IoT devices
Manufacturer Part Number Package Notes
TI TPS61041DBVR SOT-23-5 250mA switch version, lower ripple
TI TPS61040YFFR WSON-6 2x2mm WSON package version
onsemi NCP1402SN50T1 SOT-23-5 5V fixed output boost, 200mA
Microchip MCP1640D-I/SN SOIC-8 Low-voltage boost, 0.65V start
Richtek RT9271AGQW SOT-23-5 25V boost for LED backlight
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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