LT3097 Series

Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR Low Dropout Linear Regulator

Catalog

Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR Low Dropout Linear Regulator

Part	Package / Case	Current - Supply (Max) [Max]	Protection Features	Control Features	Output Configuration	Output Type	Voltage - Output (Min/Fixed)	Voltage - Input (Max)	Mounting Type	Current - Quiescent (Iq)	Supplier Device Package	Number of Regulators	Current - Output	Voltage Dropout (Max)	Voltage - Output (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Voltage Dropout (Max) [Max]
Analog Devices LT3097ADJC#TRPBF	22-WFDFN Exposed Pad	102 µA	Over Current Over Temperature Reverse Current Reverse Polarity Short Circuit Under Voltage Lockout (UVLO)	Current Limit Enable Soft Start	Positive and Negative	Adjustable	0 V	20 V	Surface Mount	101 µA	22-DFN (6x3)	2	500 mA	0.41 V 0.45 V	-19 V 15 V	-40 °C	125 ¯C
Analog Devices LT3097ADJC#PBF	22-WFDFN Exposed Pad	102 µA	Over Current Over Temperature Reverse Current Reverse Polarity Short Circuit Under Voltage Lockout (UVLO)	Current Limit Enable Soft Start	Positive and Negative	Adjustable	0 V	20 V	Surface Mount	101 µA	22-DFN (6x3)	2	500 mA		-19 V 15 V	-40 °C	125 ¯C	0.65 V

Catalog

Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR Low Dropout Linear Regulator

Key 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) and 2.2 nV/√Hz (Negative) at 10 kHz

• Ultra-low 1/f noise: 10 μV p-p (Positive) and 3.2 μV p-p (Negative) (0.1 Hz to 10 Hz)

• Ultra-high PSRR: 76 dB (Positive) and 74 dB (Negative) at 1 MHz

• 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 DFN package

Description

The LT3097 is a dual, positive and negative, high-performance, low-dropout linear regulator featuring Analog Devices, Inc., ultralow noise and ultra-high power supply rejection ratio (PSRR) architecture for powering noise-sensitive applications. Each regulator delivers up to 500 mA with a typical 260 mV/235 mV (positive/negative) dropout voltage.Operating quiescent current is nominally 2.2 mA/2.35 mA (positive/negative) and drops to 0.3 μA/3 μA (positive/negative) in shutdown. 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 operates in unity-gain and provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage.LT3097 is stable with a minimum 10 μF ceramic output capacitor for each channel. Built-in protection includes internal current limit with foldback and thermal limit with hysteresis. The positive regulator also includes reverse-battery protection and reverse-current protection. The LT3097 is available in a thermally enhanced, 22-lead 6 mm × 3 mm, Plastic dual-flat no-leads (DFN) package.APPLICATIONSBipolar very low-noise power suppliesRF power supplies: phase-locked loops, voltage-controlled oscillators, mixers, low-noise amplifiers, and power amplifiersLow-noise instrumentationHigh-speed and high-precision data convertersMedical applications: imaging and diagnosticsPrecision power suppliesPostregulator for switching supplies