LTC3897
RECOMMENDED FOR NEW DESIGNSPolyPhase Synchronous Boost Controller with Input/Output Protection
- Part Models
- 12
- 1ku List Price
- Starting From $8.29
Overview
- Input Supply Range: 4.5V to 65V (Up to 75V Surge)
- Reverse Input Protection to –40V
- In-Rush Current Control, Overcurrent Protection and Output Disconnect for Boost Converter
- Input Voltage Surge Protection with Adjustable Clamp Voltage
- Onboard Ideal Diode Controller
- Low Quiescent Current: 55µA
- 2-Phase Operation Reduces Required Input and Output Capacitance and Noise
- Output Voltage Up to 60V
- Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) for Logic-Level or Standard Threshold FETs
- No External Bootstrap Diodes Required
The LTC3897 is a synchronous boost DC/DC controller with surge stopper and ideal diode controller.
The boost controller drives two N-channel power MOSFET stages out-of-phase to reduce input and output capacitor requirements, allowing the use of smaller inductors than the single-phase equivalent. Synchronous rectification reduces power loss and eases thermal requirements.
The surge stopper controls the gate of an external N-channel MOSFET to protect against high voltage input transients and provides in-rush current control, overcurrent protection and output disconnect for the boost converter. The integrated ideal diode controller drives another N-channel MOSFET to replace a Schottky diode for reverse input protection and voltage holdup or peak detection. It controls the forward voltage drop across the MOSFET and minimizes reverse current flow.
The LTC3897 is available in thermally-enhanced 38-pin leadless QFN or 38-lead TSSOP packages.
Applications
- Industrial
- Automotive
- Military/Avionics
Documentation
Data Sheet 1
User Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3897EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3897EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3897EUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3897EUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3897HFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3897HFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3897HUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3897HUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3897IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3897IFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3897IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3897IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LTC3897EFE#PBF | PRODUCTION | |
| LTC3897EFE#TRPBF | PRODUCTION | |
| LTC3897HFE#PBF | PRODUCTION | |
| LTC3897HFE#TRPBF | PRODUCTION | |
| LTC3897IFE#PBF | PRODUCTION | |
| LTC3897IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3897EFE#PBF | PRODUCTION | |
| LTC3897EFE#TRPBF | PRODUCTION | |
| LTC3897HFE#PBF | PRODUCTION | |
| LTC3897HFE#TRPBF | PRODUCTION | |
| LTC3897IFE#PBF | PRODUCTION | |
| LTC3897IFE#TRPBF | PRODUCTION | |
|
Sep 11, 2019 - 19_0190 LTC3897 Datasheet Electrical Specification Change |
||
| LTC3897EFE#PBF | PRODUCTION | |
| LTC3897EFE#TRPBF | PRODUCTION | |
| LTC3897EUHF#PBF | PRODUCTION | |
| LTC3897EUHF#TRPBF | PRODUCTION | |
| LTC3897HFE#PBF | PRODUCTION | |
| LTC3897HFE#TRPBF | PRODUCTION | |
| LTC3897HUHF#PBF | PRODUCTION | |
| LTC3897HUHF#TRPBF | PRODUCTION | |
| LTC3897IFE#PBF | PRODUCTION | |
| LTC3897IFE#TRPBF | PRODUCTION | |
| LTC3897IUHF#PBF | PRODUCTION | |
| LTC3897IUHF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LTC4380 | RECOMMENDED FOR NEW DESIGNS | Low Quiescent Current Surge Stopper |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4359 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode Controller with Reverse Input Protection |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4367 | RECOMMENDED FOR NEW DESIGNS | 100V Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Switching Regulators & Controllers 1 | ||
| LTC3784 | RECOMMENDED FOR NEW DESIGNS | 60V PolyPhase Synchronous Boost Controller with PassThru |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3897
LTpowerCAD
Design tools for the following parts are available in LTpowerCAD:
- LTC3897
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC3897 Demo Board | Synchronous Boost Controller, 16V ≤ VIN ≤ 55V, VOUT = 48V @ 4A to 12A