Overview
The TPS71718DCKR, produced by Texas Instruments, is a member of the TPS717 family of low-dropout (LDO) linear regulators. This device is designed to offer high performance, particularly in RF and precision analog applications, while maintaining ultra-low current consumption. The TPS71718DCKR features a high-gain, high-bandwidth error loop that provides excellent power-supply rejection ratio (PSRR) with very low headroom (VIN – VOUT). It is available in a small 5-pin SC-70 package, making it ideal for small form factor portable equipment such as wireless handsets and PDAs.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.5 | 6.5 | V | |
| Output Voltage Range (Fixed) | 0.9 | 5.0 | V | |
| Output Current | 150 | mA | ||
| Dropout Voltage | 170 | mV | ||
| PSRR at 1 kHz | 70 | dB | ||
| PSRR at 100 kHz | 67 | dB | ||
| PSRR at 1 MHz | 45 | dB | ||
| Noise (100 Hz to 100 kHz) | 30 | μVRMS | ||
| Operating Temperature Range | –40 | 125 | °C | |
| Package Type | SC-70 (5-pin) |
Key Features
- Ultra-high PSRR: 70 dB at 1 kHz, 67 dB at 100 kHz, and 45 dB at 1 MHz.
- Excellent load and line transient response.
- Very low dropout voltage: 170 mV typical at 150 mA.
- Low noise: 30 μVRMS typical (100 Hz to 100 kHz).
- Small package options: 5-pin SC-70, 2-mm × 2-mm WSON-6, and 1.5-mm × 1.5-mm WSON-6.
- Stable with a 1-μF ceramic output capacitor.
- Precision voltage reference and feedback loop for high output accuracy.
- Quick-start circuit for fast charging of the output capacitor at startup.
- Noise reduction pin to bypass noise generated by the band-gap reference.
Applications
- Camera sensor power.
- Mobile phone handsets.
- PDAs and smartphones.
- Wireless LAN and Bluetooth® devices.
Q & A
- What is the input voltage range of the TPS71718DCKR? The input voltage range is from 2.5 V to 6.5 V.
- What are the available output voltage options for the TPS717 family? The TPS717 family offers fixed output voltages from 0.9 V to 5 V and adjustable output voltages from 0.9 V to 6.2 V.
- What is the typical dropout voltage of the TPS71718DCKR? The typical dropout voltage is 170 mV at 150 mA.
- How does the PSRR of the TPS71718DCKR vary with frequency? The PSRR is 70 dB at 1 kHz, 67 dB at 100 kHz, and 45 dB at 1 MHz.
- What is the noise level of the TPS71718DCKR? The noise level is typically 30 μVRMS from 100 Hz to 100 kHz.
- What package types are available for the TPS71718DCKR? The device is available in a 5-pin SC-70 package, as well as 2-mm × 2-mm and 1.5-mm × 1.5-mm WSON-6 packages.
- What is the operating temperature range of the TPS71718DCKR? The operating temperature range is from –40°C to 125°C.
- How is the output voltage stability ensured? The output voltage stability is ensured with a precision voltage reference and feedback loop, and the device is stable with a 1-μF ceramic output capacitor.
- What is the purpose of the noise reduction pin? The noise reduction pin is used to bypass noise generated by the band-gap reference, thus improving PSRR.
- What are some typical applications of the TPS71718DCKR? Typical applications include camera sensor power, mobile phone handsets, PDAs, smartphones, and wireless LAN and Bluetooth® devices.
