Overview
The TPS78618DCQR is a low-dropout (LDO) linear voltage regulator produced by Texas Instruments. This device is part of the TPS786 family, known for its high power-supply rejection ratio (PSRR), ultralow noise, and fast start-up times. The TPS78618DCQR is specifically designed to provide a fixed output voltage of 1.8V with a maximum current of 1.5A. It is available in a 6-pin SOT-223 (DCQ) package, making it suitable for a variety of applications requiring stable and low-noise voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 1.8V | V |
| Maximum Output Current | 1.5A | A |
| Input Voltage Range | 2.7 to 5.5V | V |
| Dropout Voltage | 390 mV at 1.5A | mV |
| PSRR at 10 kHz | 49 dB | dB |
| Output Noise (RMS) | 48 µV (TPS78630) | µV |
| Start-Up Time | 50 µs | µs |
| Operating Temperature Range | -40 to 125°C | °C |
| Package Type | SOT-223 (DCQ) | |
| Number of Pins | 6 |
Key Features
- 1.5-A Low-Dropout Regulator With Enable
- Available in Fixed and Adjustable Output Versions (1.2 V to 5.5 V)
- High PSRR (49 dB at 10 kHz)
- Ultralow Noise (48 µV RMS, TPS78630)
- Fast Start-Up Time (50 µs)
- Stable With a 1-µF Ceramic Capacitor
- Excellent Load and Line Transient Response
- Very Low Dropout Voltage (390 mV at Full Load, TPS78630)
- Low Quiescent Current (265 µA, typical)
- Reduced Supply Current in Standby Mode (< 1 µA)
Applications
- RF: VCOs, Receivers, ADCs
- Audio
- Bluetooth®, Wireless LAN
- Cellular and Cordless Telephones
- Handheld Organizers, PDAs
- Portable RF Electronics and other noise-sensitive analog components
Q & A
- What is the maximum output current of the TPS78618DCQR?
The maximum output current of the TPS78618DCQR is 1.5A.
- What is the output voltage of the TPS78618DCQR?
The output voltage of the TPS78618DCQR is fixed at 1.8V.
- What is the input voltage range for the TPS78618DCQR?
The input voltage range for the TPS78618DCQR is from 2.7V to 5.5V.
- What is the dropout voltage of the TPS78618DCQR at full load?
The dropout voltage of the TPS78618DCQR at full load is approximately 390 mV.
- What is the PSRR of the TPS78618DCQR at 10 kHz?
The PSRR of the TPS78618DCQR at 10 kHz is 49 dB.
- How much noise does the TPS78618DCQR produce at the output?
The TPS78618DCQR produces approximately 48 µV RMS of output noise (specifically for the TPS78630 model).
- What is the start-up time of the TPS78618DCQR?
The start-up time of the TPS78618DCQR is approximately 50 µs.
- What type of package does the TPS78618DCQR come in?
The TPS78618DCQR comes in a 6-pin SOT-223 (DCQ) package.
- What is the operating temperature range of the TPS78618DCQR?
The operating temperature range of the TPS78618DCQR is from -40°C to 125°C.
- What are some common applications for the TPS78618DCQR?
The TPS78618DCQR is commonly used in RF applications (VCOs, Receivers, ADCs), audio, Bluetooth®, Wireless LAN, cellular and cordless telephones, and handheld organizers.
