LTC7801EUFD#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
The LTC7801EUFD#PBF is an automotive-grade synchronous step-down DC/DC controller from Analog Devices, supporting input voltages from 4 V to 140 V with current-mode PWM control at 850 kHz. It operates in a 24-pin QFN package and is AEC-Q100 qualified for reliable operation across the automotive temperature range. Designed for high-voltage buck conversion in automotive ADAS, EV subsystems, and industrial 48 V bus power supplies.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- LTC7801EUFD#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.7700(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC7801EUFD#PBF?
- Wide input voltage range of 4 V to 140 V supporting automotive 12 V, 24 V, and 48 V bus architectures
- AEC-Q100 qualified automotive-grade controller ensuring reliability across -40°C to +125°C junction temperature
- Current-mode PWM control at 850 kHz enabling fast transient response and smaller passive components
- Synchronous rectification support for improved conversion efficiency above 95% in high-current automotive rails
- Compact 24-pin QFN package with exposed pad for enhanced thermal dissipation in under-hood environments
What is LTC7801EUFD#PBF used for?
The LTC7801EUFD#PBF is used in automotive ADAS camera power modules, infotainment system supply rails, and electric vehicle 48 V to 12 V step-down converters where wide input voltage tolerance and AEC-Q100 reliability are mandatory. Its 140 V input capability makes it suitable for transient-tolerant automotive load dumps and industrial 100 V bus regulation in motor drive auxiliary supplies. The controller is also deployed in telecom and industrial equipment requiring high-efficiency synchronous buck conversion from high-voltage DC buses operating at 48 V to 110 V.
What are the specifications of LTC7801EUFD#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1696 |
| YTEOL | 10 |
| Additional Feature | SEATED HT-CALCULATED |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 140V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PQCC-N24 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 60V |
| Output Voltage-Min | 0.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC24,.16X.2,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 585kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| 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 LTC7801EUFD#PBF datasheet?
LTC7801EUFD#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC7801EUFD#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LTC7801EUFD#PBF support, and how does that benefit automotive designs?
The LTC7801EUFD#PBF operates from a 4 V to 140 V input, covering standard automotive 12 V and 48 V bus voltages as well as transient load-dump spikes that can exceed 100 V on vehicle power rails. This wide range eliminates the need for external input clamp circuitry and allows a single controller design to serve both 12 V conventional and 48 V mild-hybrid automotive architectures.
How does the LTC7801EUFD#PBF's current-mode PWM control at 850 kHz benefit power supply size and transient response?
Current-mode PWM at 850 kHz allows the use of inductors as small as 4.7 µH and output capacitors below 100 µF, compared to 10 µH to 47 µH needed at 200 kHz, significantly reducing converter footprint. The inner current loop also improves load transient response, suppressing output voltage deviations to within 2% even during 10 A step load changes in automotive ECU and ADAS supply rails.
Is the LTC7801EUFD#PBF suitable for ADAS applications, and what qualifications support that?
The LTC7801EUFD#PBF is AEC-Q100 Grade 1 qualified, guaranteeing operation from -40°C to +125°C junction temperature as required by automotive ADAS camera, radar, and lidar power supply specifications. Its 140 V input tolerance and synchronous buck architecture deliver the combination of high efficiency above 90% and automotive-grade reliability needed for safety-critical ADAS sensor power domains in autonomous vehicle platforms.
How does the 24-pin QFN package with exposed pad affect thermal management in automotive converters?
The exposed thermal pad on the 24-pin QFN package provides a direct thermal path from the die to the PCB copper pour, reducing junction-to-board thermal resistance to approximately 20°C/W. This allows the LTC7801EUFD#PBF to regulate at full switching frequency in under-hood environments reaching 85°C ambient without heatsinks, provided the PCB uses 2 oz copper and at least 4 thermal vias beneath the exposed pad.
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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.
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| 1+ | $12.6500 | $12.65 |
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