Overview
The TPS61045DRBTG4 is a high-frequency boost converter produced by Texas Instruments. This device is designed to operate with an input voltage range of 1.8 to 6 V and can generate output voltages up to 28 V. It features a digitally-programmable output voltage and true shutdown capability, making it suitable for a variety of applications requiring precise voltage control and low power consumption.
The TPS61045DRBTG4 operates in a pulse frequency modulation (PFM) scheme with constant peak current control, ensuring high efficiency across the entire load current range. The device includes a switching frequency of up to 1 MHz, allowing the use of small external components and minimizing system size.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 1.8 | 6 | V | |
| Output Voltage Range | 28 | V | ||
| Switching Frequency | up to 1 | MHz | ||
| Operating Ambient Temperature | -40 | 85 | °C | |
| Operating Junction Temperature | -40 | 125 | °C | |
| Quiescent Current (No Load) | 40 | 65 | μA | |
| Shutdown Current | 0.1 | 1 | μA | |
| Main Switch MOSFET Current Limit | 300 | 375 | 450 | mA |
| Main Switch MOSFET On-Resistance | 1 | 2 | Ω | |
| Feedback Input Bias Current | 30 | 100 | nA | |
| Feedback Trip Point Voltage | 1.208 | 1.233 | 1.258 | V |
Key Features
- Digitally-programmable output voltage control
- Output voltage range up to 28 V
- Input voltage range from 1.8 to 6 V
- High efficiency up to 85%
- Switching frequency up to 1 MHz
- No load quiescent current of 40 μA typical
- Shutdown current of 0.1 μA typical
- True shutdown with output disconnected from input
- Thermal shutdown mode
- Available in a small 3-mm × 3-mm VSON package
Applications
- LCD bias supply for small to medium LCD displays
- OLED display power supply
- PDA, Pocket PC, Smart Phones
- Handheld devices
- Cellular phones
Q & A
- What is the input voltage range of the TPS61045DRBTG4?
The input voltage range is from 1.8 to 6 V.
- What is the maximum output voltage of the TPS61045DRBTG4?
The maximum output voltage is up to 28 V.
- What is the switching frequency of the TPS61045DRBTG4?
The switching frequency is up to 1 MHz.
- How does the TPS61045DRBTG4 control the output voltage?
The output voltage is controlled digitally through the CTRL pin, allowing for precise adjustments.
- What is the quiescent current of the TPS61045DRBTG4 in no-load conditions?
The quiescent current is 40 μA typical.
- What is the shutdown current of the TPS61045DRBTG4?
The shutdown current is 0.1 μA typical.
- Does the TPS61045DRBTG4 have thermal shutdown protection?
Yes, it has an internal thermal shutdown that activates if the junction temperature exceeds 160°C.
- What is the package type and size of the TPS61045DRBTG4?
The device is available in a small 3-mm × 3-mm VSON package.
- What are some common applications of the TPS61045DRBTG4?
Common applications include LCD bias supply, OLED display power supply, and power management in handheld devices and cellular phones.
- How does the TPS61045DRBTG4 handle undervoltage conditions?
The device includes an undervoltage lockout (UVLO) feature that prevents operation below 1.5 V input voltage.
