LTC3816 - Single-Phase Wide VIN Range DC/DC Controller for Intel IMVP-6/IMVP-6.5 CPUs


  • Supports 7-Bit IMVP-6/IMVP-6.5 VID Code and Features
  • Wide VIN Range: 4.5V to 36V Operation with Optional Line Feedforward Compensation
  • tON(MIN) < 35ns, Capable of Very Low Duty Cycle
  • Temperature Compensated Inductor DCR or Sense Resistor Output Current Monitoring
  • Differential Remote Output Voltage Sensing with Programmable Active Voltage Positioning
  • Phase-Lockable Fixed Frequency: 150kHz to 550kHz
  • Programmable UVLO, Preset VOUT at Boot-Up
  • Programmable Slow Slew Rate Sleep State Exit
  • Internal LDO for Single Supply Operation
  • Overvoltage and Overcurrent Protection
  • PWRGD and VRTT# Thermal Throttling Flags
  • Power Optimization During Sleep and Light Load
  • 38-Pin Thermally Enhanced eTSSOP and 5mm × 7mm QFN Packages

Typical Application

LTC3816 Typical Application
LTC3816 Typical Application


The LTC3816 is a single-phase synchronous step-down DC/DC switching regulator controller that drives N-channel power MOSFETs in a constant-frequency voltage mode architecture. The controller’s leading edge modulation topology allows extremely low output voltages and supports a phase-lockable switching frequency up to 550kHz. The output voltage is programmed using a 7-bit VID code.

The LTC3816 features all of the IMVP-6/IMVP-6.5 requirements, including start-up to a preset boot voltage, differential remote output voltage sensing with programmable active voltage positioning, IMON output current reporting, power optimization during sleep state, and fast or slow slew rate sleep state exit.

Fault protection features include input undervoltage lockout, cycle-by-cycle current limit, output overvoltage protection, and PWRGD and overtemperature flags.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3816EFE#PBF TSSOP-38 FE E 05-08-1772 Yes
LTC3816EFE#TRPBF TSSOP-38 FE E 05-08-1772 Yes
LTC3816EUHF#PBF 5x7 QFN-38 UHF E 05-08-1701 Yes
LTC3816EUHF#TRPBF 5x7 QFN-38 UHF E 05-08-1701 Yes
LTC3816IFE#PBF TSSOP-38 FE I 05-08-1772 Yes
LTC3816IFE#TRPBF TSSOP-38 FE I 05-08-1772 Yes
LTC3816IUHF#PBF 5x7 QFN-38 UHF I 05-08-1701 Yes
LTC3816IUHF#TRPBF 5x7 QFN-38 UHF I 05-08-1701 Yes

LTC3816 Package Drawing
LTC3816 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3816EFE#PBF TSSOP-38 E $5.07 $3.55 Yes
LTC3816EFE#TRPBF TSSOP-38 E $3.61 Yes
LTC3816EUHF#PBF 5x7 QFN-38 E $4.64 $3.25 Yes
LTC3816EUHF#TRPBF 5x7 QFN-38 E $3.31 Yes
LTC3816IFE#PBF TSSOP-38 I $5.69 $3.98 Yes
LTC3816IFE#TRPBF TSSOP-38 I $4.04 Yes
LTC3816IUHF#PBF 5x7 QFN-38 I $5.30 $3.71 Yes
LTC3816IUHF#TRPBF 5x7 QFN-38 I $3.77 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1672A LTC3816EUHF Demo Board u 4.5V VIN 28V, VOUT = Up to 1.5V @ 25A $150.00
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