LT3845AIFE#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
LT3845AIFE#PBF is a high-voltage synchronous current-mode step-down controller supporting 4 V to 60 V input. Features adjustable operating frequency, burst mode for light-load efficiency, and drives external N-channel MOSFETs. Designed for telecom, industrial, and automotive DC-DC conversion applications.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LT3845AIFE#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.6600(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide 4 V to 60 V input voltage range with adjustable mode up to 36 V
- Current-mode control with adjustable operating frequency
- Burst mode operation for high light-load efficiency
- Drives external N-channel synchronous MOSFETs
- Programmable soft-start and overcurrent protection
- Compact SSOP-16 package for dense power supply designs
Applications
The LT3845AIFE#PBF is ideal for high-voltage DC-DC step-down power supplies in telecom equipment, industrial automation, and distributed power architectures where input rails range from 4 V to 60 V. Its current-mode control with burst mode delivers high efficiency across load conditions, making it suitable for always-on systems with variable load profiles. The device is also used in automotive and railway power systems that demand robust operation over wide input voltage swings.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1663 (BC) |
| YTEOL | 10 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE UP TO 36V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | BURST MODE |
| Input Voltage-Max | 60V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 20V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 36V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 500kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LT3845AIFE#PBF support and how does it handle high-voltage industrial rails?
The LT3845AIFE#PBF accepts input voltages from 4 V to 60 V, covering standard 12 V, 24 V, and 48 V industrial rails without external pre-regulation. In adjustable mode it can operate up to 36 V output, giving designers flexibility for multi-rail power architectures in telecom and factory automation equipment.
How does burst mode operation in the LT3845AIFE#PBF improve efficiency at light loads in standby power supplies?
Burst mode reduces switching losses by skipping unnecessary cycles when the load current drops below a threshold, maintaining output regulation while consuming far less than 1 mA of quiescent current. This makes the controller well suited for always-on standby supplies where the load can vary from a few milliamps to several amperes during active operation.
For a 48 V telecom bus converter design, what external MOSFETs are compatible with the LT3845AIFE#PBF gate driver?
The LT3845AIFE#PBF drives external N-channel MOSFETs rated above 60 V, typically 80 V or 100 V devices, to provide adequate derating on a 48 V input bus. Gate drive voltage levels are compatible with standard logic-level and standard-threshold MOSFETs, enabling designers to optimize switch resistance (RDS(on)) and switching speed for target output power levels up to tens of amperes.
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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.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $12.4600 | $12.46 |
| 10+ | $8.5810 | $85.81 |
| 19+ | $7.5000 | $142.50 |
| 1000+ | $5.6600 | $5660.00 |
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