Texas Instruments TPS62914

Beschreibung

The TPS6291x devices are a family of high-efficiency, low noise, and low ripple current mode synchronous buck converters. The devices are designed for noise sensitive applications that normally use an LDO for post regulation such as high-speed ADCs, clock and jitter cleaner, serializer, de-serializer, and radar applications.To reduce the output voltage ripple, the device loop compensation is designed to operate with an optional second-stage ferrite bead L-C filter. Low-frequency noise levels, similar to a low-noise LDO, are further achieved by filtering the internal voltage reference with a capacitor connected to the NR/SS pin. Combined, these features allow for an output voltage ripple below 10µVRMS.The device operates at a fixed switching frequency of 2.2MHz, 1.4MHz, or 1MHz, and can be synchronized to an external clock. An optional spread spectrum modulation scheme spreads the DC/DC switching frequency over a wider span, which lowers the mixing spurs.

Eigenschaften

Low output 1/f noise < 20µVRMS(100Hz to 100kHz)Low output voltage ripple < 10µVRMS after ferrite beadHigh PSRR of > 65dB (up to 100kHz)2.2MHz, 1.4MHz, or 1.0MHz fixed frequency peak current mode controlSynchronizable with external clock (optional)Integrated loop compensation supports ferrite bead for second stage L-C filter with 30dB attenuation (optional)Spread spectrum modulation (optional)3.0V to 17V input voltage range0.8V to 5.5V output voltage range25mΩ/7mΩ RDSonOutput voltage accuracy of ±1% over temperaturePrecise enable input allowsUser-defined undervoltage lockoutExact sequencingAdjustable soft startPower-good outputOutput discharge (optional)–40°C to 150°C junction temperature range

2. mm × 3.0mm QFN with 0.5mm pitchCreate a custom design using the TPS6291x with the WEBENCH Power Designer

Typische Anwendungen

• Aerospace and defense (radar, avionics)
• Telecom infrastructure
• Medical
• Test and measurement

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers