LTC3810-5

PRODUCTION

60V Current Mode Synchronous Switching Regulator Controller

Part Models: 6
1ku List Price: Starting From $4.04

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Overview

High Voltage Operation: Up to 60V
Large 1Ω Gate Drivers
No Current Sense Resistor Required
Dual N-Channel MOSFET Synchronous Drive
Extremely Fast Transient Response
±0.5% 0.8V Voltage Reference
Programmable Output Voltage Tracking/Soft-Start
Generates 5.5V Driver Supply from Input Supply
Synchronizable to External Clock

Selectable Pulse Skip Mode Operation
Power Good Output Voltage Monitor
Adjustable On-Time/Frequency: t_ON(MIN) < 100ns
Adjustable Cycle-by-Cycle Current Limit
Programmable Undervoltage Lockout
Output Overvoltage Protection
Thermally Enhanced 32-Pin QFN Package

The LTC3810-5 is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 60V, making it ideal for telecom and automotive applications. The LTC3810-5 uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor.

A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1O gate drivers allow the LTC3810-5 to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in V_IN and can also be synchronized to an external clock for switching-noise sensitive applications. A shutdown pin allows the LTC3810-5 to be turned off, reducing the supply current to 240µA.

Integrated bias control generates gate drive power from the input supply during start-up or when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher efficiency.


	Features	Adj. UVLO, Sync & Tracking	Package
LTC3810	Vin 6.2V to 100V, 10V Driver Voltage	Yes	SSOP-28
LTC3810-5	Vin 4.35V to 60V, 5.5V Driver Voltage	Yes	QFN-32
LTC3812-5	Vin 4.35V to 60V, 5.5V Driver Voltage	No	TSSOP-16E

Applications

48V Telecom and Base Station Power Supplies
Networking Equipment, Servers
Automotive and Industrial Control Systems

Part Models: 6
1ku List Price: Starting From $4.04

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
LTC3810EUH-5#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3810EUH-5#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3810HUH-5#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3810HUH-5#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3810IUH-5#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3810IUH-5#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 22, 2022 - 22_0023 LTC3810-5 Die Revision
		PCN22_0023_Form Material_Report Qualification Results Summary
LTC3810EUH-5#PBF	PRODUCTION
LTC3810EUH-5#TRPBF	PRODUCTION
LTC3810HUH-5#PBF	PRODUCTION
LTC3810HUH-5#TRPBF	PRODUCTION
LTC3810IUH-5#PBF	PRODUCTION
LTC3810IUH-5#TRPBF	PRODUCTION
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC3810EUH-5#PBF	PRODUCTION
LTC3810EUH-5#TRPBF	PRODUCTION
LTC3810HUH-5#PBF	PRODUCTION
LTC3810HUH-5#TRPBF	PRODUCTION
LTC3810IUH-5#PBF	PRODUCTION
LTC3810IUH-5#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Circuit Monitors 1
LT2940	PRODUCTION	Power and Current Monitor
Oscillators 1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Protection Switches & Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode
Switching Regulators & Controllers 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3810
LTC3810-5

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

LTC3810EUH-5 Demo Board | 14V < VIN < 60V, VOUT = 12V @ 10A

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Product Details

Demonstration circuit 1168 is a current mode synchronous switching regulator featuring the LTC3810-5. The circuit is configured as a synchronous step-down regulator operating at 250kHz switching frequency. Output voltage is 12V at 10A maximum load. The input voltage range is 14V to 60V.

Resources

DC1168A - Demo Manual
9/24/2009

DC1168A - Design File
9/24/2009

DC1168A - Schematic
9/24/2009

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