LT3097

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $5.35

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Part Details

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

Part Models: 2
1ku List Price: Starting From $5.35

Documentation

Data Sheet 1

LT3097: Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR Low Dropout Linear Regulator Data Sheet (Rev.0) 03/21/2023

User Guide 1

UG-2099: Evaluating the LT3097 Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR, Low Dropout Linear Regulator (Rev.0) 03/21/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT3097ADJC#PBF	22-Lead Plastic DFN (6mm × 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3097ADJC#TRPBF	22-Lead Plastic DFN (6mm × 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTspice 1

LT3097 - LDO Linear Regulators

Models for the following parts are available in LTspice:

LT3097

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

Evaluating the LT3097 Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR, Low Dropout Linear Regulator

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Features and Benefits

Input voltage range: ±3.8 V to ±20 V
Resistor programmed ±3.32 V output
Maximum output current: 500 mA
BNC Connectors for noise and PSRR measurement
Resistor programmed power good
Resistor-programmable current limit and UVLO
Positive-channel current monitoring
Thermally enhanced 22-lead, 6 mm × 3 mm, Plastic DFN package

Product Details

The EVAL-LT3097-AZ evaluation board features the LT3097, a dual 500mA, positive/negative, ultra-low noise, and ultra-high power supply rejection ratio (PSRR), low-dropout (LDO) linear regulator.

The EVAL-LT3097-AZ operates over an input voltage range of 3.8 V to 20 V for the positive channel and an input voltage range of -3.8V to -20V for the negative channel. The LT3097 delivers maximum output currents of 500mA. In addition to featuring ultra-low noise and ultra-high PSRR, each channel of the regulator offers programmable power good functionality and a programmable current limit. Current monitoring is also achieved for the positive channel by sensing the ILIMP pin voltage. ILIMN architecture does not allow output current monitoring for the negative channel. The negative channel enable function (ENN/UVN pin) is bidirectional and can be controlled with either a positive or a negative voltage.

Built-in protection for the positive channel includes reverse-battery protection and reverse current protection. Built-in protection for both channels includes an internal current limit with foldback and a thermal limit with hysteresis.

For full details on the LT3097, refer to the LT3097 datasheet, which must be consulted with the user guide when using the EVAL-LT3097-AZ evaluation board.

The LT3097 of the EVAL-LT3097-AZ features a 22-lead, 6 mm x 3 mm plastic dual-flat no-leads (DFN) package with exposed pads on the bottom side of the IC. Proper board layout is essential for maximum thermal performance.