Texas Instruments TPS62968

Beschreibung

The TPS6296x 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 1.1MHz, 700kHz, or 500kHz, 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 bead
• High PSRR of > 65dB (up to 100kHz)
• 1.1MHz, 700kHz, or 500kHz fixed frequency peak current mode control
• Synchronizable 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 range
• 0.6V to 5.5V output voltage range
• 25mΩ/7mΩ RDSon
• Output voltage accuracy of ±1% over temperature
• Precise enable input allows
• User-defined undervoltage lockout
• Exact sequencing
• Adjustable soft start
• Power-good output
• Output discharge (optional)
• –40°C to 150°C junction temperature range
• 2.0mm × 3.0mm QFN with 0.5mm pitch
• Create a custom design using the TPS6296x with the WEBENCH Power Designer

Typische Anwendungen

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

Weiterführende Informationen

• Produktseite des IC-Herstellers