LT3094EDD#PBF Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
The LT3094EDD#PBF is a negative-rail ultralow noise and high PSRR LDO regulator delivering 500 mA at up to -20V input-output differential with a 0.235V typical dropout voltage. It is housed in a 12-pin DFN package for compact negative supply designs. From $6.20 in stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 12
- Lifecycle
- ACTIVE
- Datasheet
- LT3094EDD#PBF Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultralow output noise (typically 2 µV RMS, 10 Hz–100 kHz) and high PSRR for powering noise-sensitive RF, ADC, and precision analog circuits from negative supply rails
- 500 mA output current with 0.235 V typical dropout voltage over an adjustable output range on a negative rail up to -20 V input-output differential
- 12-pin DFN package with exposed thermal pad enabling compact negative-rail LDO designs paralleling multiple devices for higher output current
Applications
The LT3094EDD#PBF is designed for precision analog and RF applications requiring an ultralow noise negative supply rail, such as op-amp negative bias, ADC reference negative rail, and RF VCO varactor tuning voltage supplies. Its 2 µV RMS output noise (10 Hz to 100 kHz) and high PSRR suppress power supply interference that would degrade ADC dynamic range or RF phase noise by several dB. The device also supports paralleling multiple LT3094s using the SET and IN pins to scale output current beyond 500 mA for high-current negative rail applications.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1725 |
| Date Of Intro | 2018-09-05 |
| YTEOL | 10 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 0.41V |
| Dropout Voltage1-Nom | 0.235V |
| Input-Output Voltage Differential-Max | 20V |
| Input-Output Voltage Differential-Min | 2.3V |
| JESD-30 Code | S-PDSO-N12 |
| JESD-609 Code | e3 |
| Load Regulation-Max(%) | 0.01% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 19.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC12,.12,18 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | ADJUSTABLE NEGATIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.45mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## LT3094EDD#PBF Alternates Showing results | Image |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output noise specification does the LT3094EDD#PBF achieve and why does it matter for ADC designs?
The LT3094EDD#PBF achieves a typical output noise of 2 µV RMS measured from 10 Hz to 100 kHz, which is among the lowest of any 500 mA negative LDO. For a 16-bit or 24-bit ADC with a ±5 V input range, noise from the negative analog supply rail directly adds to the input-referred noise floor. Keeping negative rail noise below 5 µV RMS preserves dynamic range above 100 dB, preventing ADC performance degradation in precision instrumentation and data acquisition systems.
How does the LT3094EDD#PBF's PSRR benefit RF circuit negative supply rails?
The LT3094EDD#PBF provides greater than 60 dB PSRR at 1 MHz, attenuating switching regulator ripple and digital noise on the input rail by a factor of more than 1000× at the output. For RF VCO and PLL circuits drawing negative bias from a shared power supply, high PSRR at RF frequencies prevents supply modulation from appearing as phase noise sidebands, maintaining VCO phase noise better than -120 dBc/Hz at 1 MHz offset in well-designed RF front-end boards.
Can multiple LT3094EDD#PBF devices be paralleled for currents above 500 mA on a negative rail?
Yes, the LT3094EDD#PBF supports current sharing through its SET and IN pin paralleling architecture, similar to the positive-rail LT3080. Connecting SET pins through matched resistors and joining the output pins allows n devices to share current equally, providing n × 500 mA total. Two devices deliver 1 A, and three deliver 1.5 A. This distributed approach also spreads thermal dissipation across multiple 12-pin DFN packages, reducing junction temperature by 30–50°C compared to a single high-current LDO in compact PCB designs.
What is the maximum input-output voltage differential for the LT3094EDD#PBF and what negative rails does it support?
The LT3094EDD#PBF supports a maximum input-output voltage differential of 20 V with a minimum of 2.3 V, and the dropout voltage is typically 0.235 V at 500 mA. This allows regulation of negative outputs from -1.2 V to -19 V when powered from a suitable negative input rail. Typical applications include -5 V or -15 V analog power rails in instrumentation amplifiers, op-amp split supplies, and RF mixer bias circuits powered from -18 V to -20 V input rails.
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