LTC7897
RECOMMENDED FOR NEW DESIGNS
140V, Low I
- Part Models
- 2
- 1ku List Price
- Starting From $4.44
Overview
- Wide VIN Range: 4V to 135V (140V ABS MAX)
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 135V (140V ABS MAX)
- Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE, 14V ABS MAX)
- Adjustable Driver Voltage UVLO
- Adaptive or Resistor Adjustable Dead Times
- Split-Output Gate Drivers for Adjustable Turn-On and Turn-Off Driver Strengths
- 100% Duty Cycle Operation
- Low Operating IQ: 5μA (48V<IN to 3.3VOUT)
- Spread Spectrum Frequency Modulation
- Programmable Frequency (100kHz to 2.5MHz);
- Synchronizable Frequency (100kHz to 2.5MHz);
- 28-Pin (4mm x 5mm) QFN Package
The LTC®7897 is a high performance, 100% duty cycle capable, synchronous step-down, DC/DC switching regulator controller that drives all N-channel synchronous silicon metal oxide field effect transistor (MOSFET) power stages. Synchronous rectification increases efficiency, reduces power loss, and simplifies the application design by reducing thermal requirements.
The wide input and output voltage ranges of the LTC7897 enable not only high step-down ratios but also a wide range of positive to negative voltage conversion. The gate drivers of the LTC7897 provide robustness with a 14V ABS MAX rating and flexibility with adjustable drive levels and dead times to optimize applications.
The gate drive voltage of the LTC7897 can optionally be adjusted from 5V to 10V to allow use of logic-level or standard threshold MOSFETs. The dead times of the LTC7897 can be optimized with external resistors for margin or to tailor the application for higher efficiency and allow for high frequency operation.
Applications
- Industrial Power Systems
- Military/Avionics
- Telecommunications Power Systems
Documentation
Data Sheet 1
User Guide 1
Rarely Asked Question 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 |
|---|---|---|---|
| LTC7897RUFD#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC7897RUFD#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 11, 2025 - 25_0123 LTC7897 Data Sheet Revision |
||
| LTC7897RUFD#PBF | PRODUCTION | |
| LTC7897RUFD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC7897
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
Wide Input and Output Voltage Synchronous Buck Controller