LT3045EMSE-1#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT3045EMSE-1#PBF is a 20 V, 500 mA ultralow-noise LDO linear regulator with −4 dBm output noise and 76 dB PSRR at 1 MHz in a 12-lead MSOP-EP package. It features programmable current-limit and adjustable output voltage for sensitive RF and precision analog supplies. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 12
- Lifecycle
- ACTIVE
- Datasheet
- LT3045EMSE-1#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.8800(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3045EMSE-1#PBF?
- 2 µVRMS output noise from 10 Hz to 100 kHz and 76 dB PSRR at 1 MHz make it ideal for powering VCOs, PLLs, and low-noise amplifiers
- 500 mA output current with 0.26 V typical dropout voltage at full load minimizes power loss in 5 V to 3.3 V conversion
- Adjustable output voltage via a single resistor from near 0 V to 15 V, supporting flexible power rail design
- Paralleling capability allows multiple LT3045 devices to share current with no extra components, scaling output current in 500 mA increments
What is LT3045EMSE-1#PBF used for?
The LT3045EMSE-1#PBF is the preferred power supply solution for RF synthesizers, VCO modules, and ADC reference circuits where supply noise directly degrades phase noise and SNR performance. Its sub-2 µVRMS output noise and high PSRR at RF frequencies allow it to post-regulate noisy switching converter outputs, isolating sensitive analog subsystems from switcher-induced ripple. The parallelable architecture enables scalable multi-ampere clean power rails in high-performance test equipment, wireless base station RF front ends, and precision instrumentation amplifiers.
What are the specifications of LT3045EMSE-1#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1666 |
| Date Of Intro | 2017-04-05 |
| YTEOL | 9 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 0.45V |
| Dropout Voltage1-Nom | 0.26V |
| JESD-30 Code | R-PDSO-G12 |
| JESD-609 Code | e3 |
| Load Regulation-Max(%) | 0.03% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 15V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
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 LT3045EMSE-1#PBF datasheet?
LT3045EMSE-1#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3045EMSE-1#PBF?
Compatible alternatives and drop-in replacements for LT3045EMSE-1#PBF:
Frequently Asked Questions
What is the output noise of LT3045EMSE-1#PBF, and why does it matter for VCO power supplies?
The LT3045EMSE-1#PBF produces only 2 µVRMS integrated output noise from 10 Hz to 100 kHz, which is 5 to 10 times lower than standard LDO regulators. For a VCO supply, this translates directly to improved phase noise: a 1 µV noise floor on the supply raises VCO phase noise by roughly 2 dBc/Hz at close-in offsets, so the LT3045's ultralow noise helps RF systems meet −110 dBc/Hz or better phase noise specifications.
How does LT3045EMSE-1#PBF achieve 500 mA output current, and can multiple devices be paralleled?
The LT3045 delivers 500 mA from a single device with a maximum dropout voltage of 0.45 V and typical 0.26 V at full load. Multiple LT3045 devices can be directly paralleled by connecting their outputs and ILIM pins together, with each device naturally sharing current equally due to the current-mode architecture—no ballast resistors or additional control circuitry are needed, allowing straightforward scaling to 1 A, 1.5 A, or higher in 500 mA steps.
What is the PSRR of LT3045EMSE-1#PBF at switching regulator frequencies, and can it post-regulate a switcher?
The LT3045EMSE-1#PBF provides 76 dB PSRR at 1 MHz and above 70 dB PSRR across 10 kHz to 1 MHz, making it highly effective as a post-regulator after a 300 kHz to 1 MHz switching converter. A 100 mVpp switcher ripple at 500 kHz is attenuated to approximately 5 µVpp at the LT3045 output, effectively eliminating visible switching artifacts on sensitive PLO and ADC reference supply rails.
How is the output voltage of LT3045EMSE-1#PBF set, and what voltage range is achievable?
Output voltage is programmed by a single resistor connected between the SET pin and VOUT, where VOUT equals ISET × RSET with ISET fixed internally at 50 µA. The output can be adjusted from near 0 V to 15 V by selecting resistor values from 0 Ω to 300 kΩ, giving designers continuous voltage adjustment across the full range without needing multiple fixed-voltage regulator SKUs.
Under what conditions does LT3045EMSE-1#PBF thermally limit, and how should the MSOP-EP package be cooled?
The LT3045EMSE-1#PBF in the 12-lead MSOP with exposed pad (EP) has a junction-to-board thermal resistance of approximately 37°C/W when the EP is soldered to a 2-layer board copper pour. At 500 mA output with a 5 V input and 3.3 V output (1.7 V dropout × 0.5 A = 850 mW dissipation), junction temperature rises approximately 31°C above the PCB copper, requiring a PCB copper area of at least 1 cm² for continuous operation at 85°C ambient.
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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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| 1+ | $9.4000 | $9.40 |
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