LT3097
LT3097
RECOMMENDED FOR NEW DESIGNSDual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR Low Dropout Linear Regulator
- Part Models
- 2
- 1ku List Price
- Starting From $6.77
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Overview
- 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
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.
APPLICATIONS
- Bipolar very low-noise power supplies
- RF power supplies: phase-locked loops, voltage-controlled oscillators, 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
Documentation
Data Sheet 1
User Guide 1
Analog Dialogue 1
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) | ||
| LT3097ADJC#TRPBF | 22-Lead Plastic DFN (6mm × 3mm) |
This is the most up-to-date revision of the Data Sheet.
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LTspice
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.
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Evaluating the LT3097 Dual 500mA, Positive/Negative, Ultra-Low Noise, Ultra-High PSRR, Low Dropout Linear Regulator