Overview
The TPS61040DBVR, produced by Texas Instruments, is a high-frequency boost converter designed for small to medium LCD bias supply and white LED backlight applications. This device is capable of generating output voltages up to 28 V from input voltages ranging from 1.8 V to 6 V, making it ideal for use with dual-cell NiMH/NiCd or single-cell Li-Ion batteries. The TPS61040DBVR operates with a switching frequency of up to 1 MHz, allowing the use of small external components such as ceramic or tantalum output capacitors, which contributes to a compact overall solution size.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.8 to 6 | V |
| Adjustable 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 | μA |
| Shutdown Current | 1 μA | μA |
| Package Types | SOT23-5, TSOT23-5, 2-mm × 2-mm × 0.8-mm WSON | |
| Operating Temperature Range | -40 to 125 | °C |
| MOSFET On-Resistance | 600 to 1000 mΩ (TPS61040), 750 to 1250 mΩ (TPS61041) | mΩ |
| MOSFET Current Limit | 350 to 450 mA (TPS61040), 215 to 285 mA (TPS61041) | mA |
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 for TPS61040 and 250 mA for TPS61041
- Low quiescent current: typically 28 μA
- Low shutdown current: typically 1 μA
- Internal soft start
- Available in SOT23-5, TSOT23-5, and 2-mm × 2-mm × 0.8-mm WSON packages
- High efficiency over the entire load current range using pulse-frequency-modulation (PFM) scheme with constant peak current control
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 TPS61040DBVR?
The input voltage range is from 1.8 V to 6 V.
- What is the maximum output voltage that the TPS61040DBVR can generate?
The device can generate output voltages up to 28 V.
- What are the internal switch current limits for the TPS61040 and TPS61041?
The TPS61040 has an internal switch current limit of 400 mA, while the TPS61041 has a limit of 250 mA.
- What is the typical no-load quiescent current of the TPS61040DBVR?
The typical no-load quiescent current is 28 μA.
- What is the typical shutdown current of the TPS61040DBVR?
The typical shutdown current is 1 μA.
- In what packages is the TPS61040DBVR available?
The device is available in SOT23-5, TSOT23-5, and 2-mm × 2-mm × 0.8-mm WSON packages.
- What is the operating temperature range of the TPS61040DBVR?
The operating temperature range is from -40°C to 125°C.
- What are some common applications of the TPS61040DBVR?
Common applications include LCD bias supply, white LED backlight supplies, digital still cameras, PDAs, cellular phones, and internet audio players.
- How does the TPS61040DBVR achieve high efficiency?
The device achieves high efficiency through a pulse-frequency-modulation (PFM) scheme with constant peak current control.
- What is the significance of the high switching frequency of the TPS61040DBVR?
The high switching frequency of up to 1 MHz allows the use of very small external components, contributing to a compact solution size.
