Overview
The TPS61040DBVRG4, 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 part of the TPS6104x family and is particularly suited for generating output voltages up to 28 V from a dual-cell NiMH/NiCd or a single-cell Li-Ion battery. It can also be used for standard power conversions such as 3.3 V, 5 V, or 12 V. The TPS61040 operates with a switching frequency up to 1 MHz, enabling the use of small external components, including ceramic and tantalum output capacitors, which contributes to a very compact overall solution size.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 1.8 V to 6 V |
| Adjustable Output Voltage Range | Up to 28 V |
| Internal Switch Current Limit | 400 mA (TPS61040), 250 mA (TPS61041) |
| Switching Frequency | Up to 1 MHz |
| No-Load Quiescent Current | Typically 28 µA |
| Shutdown Current | Typically 1 µA |
| Package Options | SOT23-5, TSOT23-5, 2-mm × 2-mm × 0.8-mm WSON |
| Operating Temperature Range | -40°C to 125°C |
Key Features
- High-frequency boost converter with up to 1-MHz switching frequency
- Internal soft start for smooth startup
- Low quiescent current (typically 28 µA) and low shutdown current (typically 1 µA)
- Available in SOT23-5, TSOT23-5, and 2-mm × 2-mm × 0.8-mm WSON packages
- Optimized control scheme for high efficiency over the entire load current range
- Supports small external components, including ceramic and tantalum output capacitors
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 of the TPS61040 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 internal switch current limit of the TPS61040?
The internal switch current limit of the TPS61040 is 400 mA.
- What is the typical no-load quiescent current of the TPS61040?
The typical no-load quiescent current of the TPS61040 is 28 µA.
- What is the typical shutdown current of the TPS61040?
The typical shutdown current of the TPS61040 is 1 µA.
- What are the available package options 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 operating temperature range of the TPS61040?
The operating temperature range of the TPS61040 is from -40°C to 125°C.
- What applications is the TPS61040 typically used for?
The TPS61040 is typically used for LCD bias supply, white LED backlight supplies, digital still cameras, PDAs, cellular phones, and standard power conversions.
- How does the TPS61040 achieve high efficiency?
The TPS61040 achieves high efficiency through its optimized control scheme and high switching frequency, allowing it to maintain high efficiency over the entire load current range.
- What type of external components can be used with the TPS61040?
The TPS61040 can use small external components, including ceramic and tantalum output capacitors.
