LT3078AV#PBF

LT3078AV#PBF is a low voltage, ultra-low noise, high power-supply rejection ratio (PSRR), and ultra-fast transient response linear regulator. This device supplies up to 5A with a typical dropout voltage of 55mV. A 4.7µF reference bypass capacitor decreases output voltage noise to 1.3µVRMS (10Hz to 100KHz). The wide bandwidth and high PSRR deliver the best performance without the need for bulky capacitors, which saves space and cost. It is ideal for powering high-performance FPGAs, data converters, RF, and all noise-sensitive signal chain applications. This device’s unity-gain operation provides virtually constant output noise, PSRR, and bandwidth independent of the programmed output voltage. It is used in applications such as RF power supplies: PLLs, VCOs, mixers, LNAs, PAs, high speed/high precision data converters, low noise instrumentation, post-regulator for switching supplies, FPGA and DSP power supplies, and medical applications.

• Power good (PG) flag, internal die temperature monitor
• VIOC pin to control upstream switching converter, precision enable/undervoltage lockout (UVLO)
• VIN ripple rejection is 49dB typical at (VRIPPLE = 50mVP-P, fRIPPLE = 1MHz, IOUT = 5A)
• Output RMS noise is 1.3μVRMS typical at (BW = 10Hz to 100KHz, CREF = 4.7μF)
• Output noise spectral density is 3.5nV/√Hz typical at (frequency = 10KHz, CREF = 0.47μF)
• EN pin current is 0.5μA typical at (VEN = 1.3V, VBIAS = 5.5V)
• Dropout voltage is 55mV typical at (TJ = 25°C)
• Ultra-fast transient response, input voltage range from 0.6V to 5.5V
• BIAS pin current is 4.3mA typical at (VIN = 1.5V, VOUT = 1.2V, VBIAS = 3.3V, IOUT = 10mA)
• Operating temperature range from -40°C to 125°C, 22-lead LQFN package

Notes

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