LT3905EUD#TRPBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
The LT3905EUD#TRPBF is an Analog Devices 60 V boost DC-DC converter with integrated APD current monitor, accepting 2.7 V to 12 V input and delivering up to 60 V output using current-mode PWM control in a compact QFN package. It also supports adjustable output mode for flexible optical receiver biasing. Available in stock worldwide with competitive pricing.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LT3905EUD#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.5300(MOQ 19)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3905EUD#TRPBF?
- 60 V output boost conversion from 2.7 V to 12 V input enables single-supply biasing of avalanche photodiodes (APDs) in optical receivers and LiDAR systems
- Integrated APD current monitor provides accurate optical signal current readout without external transimpedance amplifier, reducing BOM and board area
- Current-mode PWM control with adjustable output mode supports stable bias regulation over temperature for precise APD gain control in fiber optic and sensing applications
What is LT3905EUD#TRPBF used for?
The LT3905EUD#TRPBF is specifically designed for biasing avalanche photodiodes (APDs) in fiber optic receivers, optical time-domain reflectometers (OTDRs), and LiDAR proximity sensors where a stable high-voltage bias from a low-voltage supply rail is required. Its integrated APD current monitor simplifies received optical power measurement by providing a proportional current output that eliminates discrete monitoring circuitry. Industrial and medical optical sensing equipment benefit from its 2.7 V to 12 V input range and adjustable 60 V boost output, which accommodates a wide range of APD bias voltage requirements without redesigning the power supply stage.
What are the specifications of LT3905EUD#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1691 |
| YTEOL | 10 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 12V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 3.3V |
| JESD-30 Code | S-PQCC-N16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.45A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Current-Max (Isup) | 0.75mA |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 2200kHz |
| Technology | BIPOLAR |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat 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 LT3905EUD#TRPBF datasheet?
LT3905EUD#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3905EUD#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range and maximum output voltage does the LT3905EUD#TRPBF support?
The LT3905EUD#TRPBF accepts input voltages from 2.7 V to 12 V and boosts the output up to 60 V, which is the typical reverse bias voltage range required for avalanche photodiodes (APDs) in fiber optic receivers and LiDAR sensors. This wide input range allows the converter to operate from 3.3 V logic rails, single-cell Li-ion batteries, or regulated 5 V and 12 V bus supplies without additional pre-regulation.
How does the integrated APD current monitor in the LT3905EUD#TRPBF simplify optical receiver design?
The integrated APD current monitor in the LT3905EUD#TRPBF senses the reverse bias current flowing through the avalanche photodiode and provides a scaled current output proportional to received optical power. This eliminates the need for a separate transimpedance amplifier or precision current sense resistor in the APD bias circuit, reducing component count by 3 to 5 parts and saving up to 30 mm² of board area in compact optical receiver modules used in fiber-to-the-home and industrial sensing equipment.
Which optical sensing applications benefit from the LT3905EUD#TRPBF adjustable output mode?
The adjustable output mode of the LT3905EUD#TRPBF allows the APD bias voltage to be set across a range from approximately 10 V to 60 V using external resistor dividers, which is important for LiDAR range finders and OTDR instruments that must compensate for APD gain variation over -40°C to +85°C. By dynamically adjusting the bias voltage by 2 V to 5 V per 10°C change through a DAC-controlled feedback resistor, the system maintains consistent APD avalanche gain and detection sensitivity across the full operating temperature range.
What package does the LT3905EUD#TRPBF use, and how does it affect board space in optical module designs?
The LT3905EUD#TRPBF is housed in a compact QFN (Quad Flat No-Lead) package, which provides a small PCB footprint with exposed thermal pad for heat dissipation. The QFN form factor is typically 3 mm x 3 mm or 4 mm x 4 mm depending on pin count, enabling the 60 V boost converter and APD monitor to fit within the constrained board area of small form factor optical transceiver modules (SFP or QSFP) and handheld LiDAR sensor heads where board space is budgeted in single-digit square centimeters.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Analog Devices
LT3062EDCB#TRPBF
Small Outline No-lead
Integrated Circuit
LT3062EDCB#TRMPBF
Small Outline No-lead
Integrated Circuit
LT8641IUDC#TRPBF
Other
Integrated Circuit
HMC412AMS8GTR
Small Outline Packages
Integrated Circuit
LT3062HMS8E#PBF
Small Outline Packages
Integrated Circuit
LT3062IMS8E#PBF
Small Outline Packages
Integrated Circuit
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 19+ | $4.6800 | $88.92 |
| 500+ | $3.8375 | $1918.75 |
| 1000+ | $3.5300 | $3530.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit