LTC7801

RECOMMENDED FOR NEW DESIGNS

150V Low I_Q, Synchronous Step-Down DC/DC Controller

Data Sheet (Rev. A) Product Selection Table

Part Models: 12
1ku List Price: Starting From $5.02

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Part Details

Wide V_IN Range: 4V to 140V (150V Abs Max)
Wide Output Voltage Range: 0.8V to 60V
Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE)
Low Operating I_Q: 40μA (Shutdown = 10μA)
100% Duty Cycle Operation
Integrated Bootstrap Diode
Selectable Gate Drive UVLO Thresholds
Onboard LDO or External NMOS LDO for DRV_CC
EXTV_CC LDO Powers Drivers from V_OUT

Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode^® Operation at Light Loads
Adjustable Burst Clamp
Power Good Output Voltage Monitor
Programmable Input Overvoltage Lockout
Small 24-Lead 4mm × 5mm QFN or TSSOP Packages

Part Models: 12
1ku List Price: Starting From $5.02

Documentation

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
LTC7801EFE#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801EFE#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801EUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801EUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801HFE#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801HFE#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801HUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801HUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801IFE#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801IFE#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801IUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7801IUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC7801EFE#PBF	PRODUCTION
LTC7801EFE#TRPBF	PRODUCTION
LTC7801HUFD#PBF	PRODUCTION
LTC7801HUFD#TRPBF	PRODUCTION
LTC7801IFE#PBF	PRODUCTION
LTC7801IFE#TRPBF	PRODUCTION
LTC7801IUFD#PBF	PRODUCTION
LTC7801IUFD#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LTC7801EFE#PBF	PRODUCTION
LTC7801EFE#TRPBF	PRODUCTION
LTC7801HFE#PBF	PRODUCTION
LTC7801HFE#TRPBF	PRODUCTION
LTC7801IFE#PBF	PRODUCTION
LTC7801IFE#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
High Voltage Hot Swap Controllers 1
LTM9100	PRODUCTION	Anyside^™ High Voltage Isolated Switch Controller with I²C Command and Telemetry
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4366	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper

Parts	Product Life Cycle	Description
LTC3895	RECOMMENDED FOR NEW DESIGNS	150V Low I_Q, Synchronous Step-Down DC/DC Controller
LTC7800	RECOMMENDED FOR NEW DESIGNS	Low I_Q , 60V, High Frequency Synchronous Step-Down Controller

Tools & Simulations

LTspice 1

LTC7801 - Step-Down (Buck) Regulators

Models for the following parts are available in LTspice:

LTC7801

LTpowerCAD 1

LTC7801 Project - Synchronous Step-Down DC/DC Controller (16-100V to 12V @ 10A)

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC7801EUFD Demo Board | Synchronous Buck Controller, 16V ≤ VIN ≤ 100V, VOUT = 12V @ 10A

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Product Details

Demonstration circuit 2641A is a single output synchronous buck converter featuring the LTC7801EUFD in the 24-lead QFN package. The input voltage range is from 16V to 100V and the output is 12V/10A. The DC2641A is configured with a sense resistor for overcurrent protection. Inductor DCR current sensing is optional.

Resources

DC2641A - Demo Manual
770.00K

DC2641A - Design Files
1.00M

DC2641A - Schematic
42.00K

Latest Discussions

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LTC7801

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Product Selector Card 2

Press Release 1