LT3042EDD#TRPBF Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
The LT3042EDD#TRPBF is an ultralow-noise, ultrahigh PSRR RF linear regulator from Analog Devices delivering 200 mA with only 0.22 V typical dropout and adjustable output up to 20 V. It achieves 0.8 µVRMS output noise (10 Hz to 100 kHz) and greater than 76 dB PSRR at 1 MHz, making it ideal for noise-sensitive RF and precision analog circuits. Supplied in a compact 10-pin DFN package for space-efficient board layouts.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- LT3042EDD#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.7874(MOQ 19)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3042EDD#TRPBF?
- 0.8 µVRMS output noise (10 Hz to 100 kHz) for ultra-quiet RF and ADC supply rails
- Greater than 76 dB PSRR at 1 MHz isolating RF circuits from switcher-induced noise
- 200 mA output current with only 0.22 V typical dropout voltage
- Parallel-able architecture allowing multiple LT3042 units to share current for higher output ratings
- 0.003% load regulation maintaining precise voltage under dynamic current draw
What is LT3042EDD#TRPBF used for?
The LT3042EDD#TRPBF is the preferred post-regulator for PLL VCO supply rails, ADC reference supplies, and RF LNA bias networks where switching regulator noise would degrade phase noise, SNR, or receiver sensitivity. Its ability to be connected in parallel allows designers to scale output current in 200 mA increments, making it equally suitable for high-current RF power amplifier bias as for ultra-sensitive low-noise amplifier supplies. Precision instrumentation, medical imaging front-ends, and spectrum analyzer reference sections rely on its combination of sub-microvolt noise floor and high PSRR to isolate measurement circuitry from noisy digital power domains.
What are the specifications of LT3042EDD#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1699 |
| YTEOL | 10 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 0.3V |
| Dropout Voltage1-Nom | 0.22V |
| JESD-30 Code | S-PDSO-N10 |
| JESD-609 Code | e3 |
| Load Regulation-Max(%) | 0.003% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.2A |
| Output Voltage1-Max | 15V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| 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 |
Where can I find the LT3042EDD#TRPBF datasheet?
LT3042EDD#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3042EDD#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output noise specification of LT3042EDD#TRPBF and why does it matter for RF circuits?
The LT3042EDD#TRPBF achieves 0.8 µVRMS integrated output noise from 10 Hz to 100 kHz and approximately 4 µVRMS from 10 Hz to 1 MHz. For a PLL VCO supply, power supply noise directly modulates the oscillator frequency, contributing to phase noise; at 0.8 µVRMS supply noise, the phase noise contribution from the regulator is below -160 dBc/Hz in most VCO designs, effectively eliminating the supply rail as a phase noise source.
What is the PSRR of LT3042EDD#TRPBF at 1 MHz, and how does it compare to standard LDO regulators?
The LT3042EDD#TRPBF delivers greater than 76 dB PSRR at 1 MHz, which means switching noise at that frequency is attenuated by a factor of over 6,000 from input to output. Standard LDO regulators typically fall below 20 dB PSRR at 1 MHz because their error amplifier bandwidth does not extend that high. The LT3042's high-frequency PSRR is achieved through a unique current-source based architecture rather than conventional error-amplifier topology.
Can multiple LT3042EDD#TRPBF devices be connected in parallel to increase output current beyond 200 mA?
Yes. The LT3042EDD#TRPBF is specifically designed for paralleling by using an internal 100 µA current source reference that allows matched output impedance across units. Two devices in parallel deliver 400 mA, three deliver 600 mA, and so on, with current sharing accuracy of better than 5% between units at the same temperature. This is documented in the datasheet as the primary method to scale current for RF PA bias or high-current precision reference applications.
What is the dropout voltage of LT3042EDD#TRPBF, and how does this affect headroom planning in 3.3 V output designs?
The typical dropout voltage of LT3042EDD#TRPBF is 0.22 V at 200 mA, with a maximum of 0.3 V. For a 3.3 V regulated output, the input supply needs to be only 3.52 V to 3.6 V minimum, allowing the regulator to be powered directly from a 3.7 V lithium-ion cell or a 5 V bus without wasting significant headroom. This low dropout keeps efficiency above 90% in battery-to-regulated-rail applications.
How is the output voltage of LT3042EDD#TRPBF set, and what range is adjustable?
The output voltage is set by a single resistor connected from the SET pin to ground. The internal 100 µA reference current flows through this resistor to establish VOUT; a 33.2 kΩ resistor gives 3.32 V output. The output is continuously adjustable from 0 V up to 20 V minus the input supply limit, providing design flexibility for VCO supplies at 2.5 V, 5 V, or 12 V bias rails in a single standard footprint without changing the IC.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 19+ | $4.1500 | $78.85 |
| 77+ | $3.9386 | $303.27 |
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