Overview
The TPS61040DRVT, produced by Texas Instruments, is a high-frequency boost converter designed for small to medium LCD bias supplies and white LED backlight applications. This device operates within an input voltage range of 1.8 V to 6 V and can generate output voltages up to 28 V. It is particularly suited for applications requiring high efficiency and small form factor solutions, such as digital still cameras, PDAs, handheld PCs, cellular phones, and internet audio players.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.8 to 6 | V |
| Output Voltage Range | Up to 28 | V |
| Internal Switch Current | 400 mA (TPS61040), 250 mA (TPS61041) | mA |
| Switching Frequency | Up to 1 MHz | Hz |
| No-Load Quiescent Current | 28 μA (typical) | μA |
| Shutdown Current | 1 μA (typical) | μA |
| MOSFET On-Resistance | 600 to 1000 mΩ (TPS61040), 750 to 1250 mΩ (TPS61041) | mΩ |
| Maximum Switch Voltage | 30 V | V |
| Minimum Off Time | 250 to 550 ns | ns |
| Maximum On Time | 4 to 7.5 μs | μs |
| Line Regulation | 0.05 %/V | %/V |
| Load Regulation | 0.15 %/mA | %/mA |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | SOT23-5, TSOT23-5, 2-mm × 2-mm × 0.8-mm WSON |
Key Features
- High-frequency boost converter with up to 1-MHz switching frequency
- Adjustable output voltage range up to 28 V
- Internal switch current limit: 400 mA (TPS61040) and 250 mA (TPS61041)
- Low quiescent current: 28 μA typical
- Low shutdown current: 1 μA typical
- Internal soft start
- Pulse-frequency-modulation (PFM) scheme with constant peak current control for high efficiency
- Small form factor packages: SOT23-5, TSOT23-5, and 2-mm × 2-mm × 0.8-mm WSON
Applications
- LCD bias supply
- White LED backlight supplies for LCDs
- Digital still cameras
- PDAs, organizers, and handheld PCs
- Cellular phones
- Internet audio players
- Standard 3.3-V or 5-V to 12-V power conversions
Q & A
- What is the input voltage range of the TPS61040?
The input voltage range is from 1.8 V to 6 V.
- What is the maximum output voltage that the TPS61040 can generate?
The TPS61040 can generate output voltages up to 28 V.
- What is the switching frequency of the TPS61040?
The switching frequency can be up to 1 MHz.
- What is the typical no-load quiescent current of the TPS61040?
The typical no-load quiescent current is 28 μA.
- What is the typical shutdown current of the TPS61040?
The typical shutdown current is 1 μA.
- What are the package options available for the TPS61040?
The TPS61040 is available in SOT23-5, TSOT23-5, and 2-mm × 2-mm × 0.8-mm WSON packages.
- What is the internal switch current limit for the TPS61040 and TPS61041?
The internal switch current limit is 400 mA for the TPS61040 and 250 mA for the TPS61041.
- What control scheme does the TPS61040 use to maintain high efficiency?
The TPS61040 uses a pulse-frequency-modulation (PFM) scheme with constant peak current control.
- What are some typical applications for the TPS61040?
Typical applications include LCD bias supply, white LED backlight supplies, digital still cameras, PDAs, cellular phones, and internet audio players.
- How does the TPS61040 manage its output voltage regulation?
The device monitors the output voltage and adjusts it based on a feedback voltage compared to an internal reference voltage of typically 1.233 V.
