LT3097ADJC#PBF

LT3097ADJC#PBF FEATURES

► Ultra-low output RMS noise: 0.8 μV rms (10 Hz to 100 kHz)► Ultra-low output noise spectral density: 2 nV/√Hz (Positive) and2.2 nV/√Hz (Negative) at 10 kHz► Ultra-low 1/f noise: 10 µV p-p (Positive) and 3.2 µV p-p (Nega-tive) (0.1 Hz to 10 Hz)► Ultra-high PSRR: 76 dB (Positive) and 74 dB (Negative) at 1MHz► Output current: 500 mA► Wide input voltage range: ±1.8 V to ±20 V► Single capacitor per channel improves noise and PSRR► SET pin current: 100 µA, ±1% initial accuracy► Single resistor per channel programs output voltage► Programmable current limit► Low-dropout voltage: 260 mV (Positive) and 235 mV (Negative)► Output voltage range: 0 V to 15 V (Positive) and 0 V to –19.5 V(Negative)► Programmable power good► Fast start-up capability► Precision enable/undervoltage lockout (UVLO)► Internal current limit with foldback► Minimum output capacitor: 10 µF ceramic► Compact, low-profile, 22-lead, 6 mm × 3 mm, Plastic DFNpackage

LT3097ADJC#PBF GENERAL DESCRIPTION

The LT3097 is a dual, positive and negative, high-performance,low-dropout linear regulator featuring Analog Devices, Inc., ultra-low noise and ultra-high power supply rejection ratio (PSRR) archi-tecture for powering noise-sensitive applications. Each regulatordelivers up to 500 mA with a typical 260 mV/235 mV (positive/nega-tive) dropout voltage.Operating quiescent current is nominally 2.2 mA/2.35 mA (posi-tive/negative) and drops to 0.3 µA/3 µA (positive/negative) in shut-down. The LT3097 has a wide output voltage range (0 V to 15 V,positive and 0 V to -19.5 V, negative) error amplifier that operatesin unity-gain and provides virtually constant output noise, PSRR,bandwidth and load regulation, independent of the programmedoutput voltage.LT3097 is stable with a minimum 10 μF ceramic output capacitor foreach channel. Built-in protection includes internal current limit withfoldback and thermal limit with hysteresis. The positive regulatoralso includes reverse-battery protection and reverse-current protec-tion. The LT3097 is available in a thermally enhanced, 22-lead 6mm × 3 mm, Plastic dual-flat no-leads (DFN) package.Figure 2. PSRR vs. Frequency

LT3097ADJC#PBF APPLICATIONS

► Bipolar very low-noise power supplies► RF power supplies: phase-locked loops, voltage-controlled oscil-lators, mixers, low-noise amplifiers, and power amplifiers► Low-noise instrumentation► High-speed and high-precision data converters► Medical applications: imaging and diagnostics► Precision power supplies► Postregulator for switching supplies