LTC7810 - 150V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

Features

  • Wide VIN Range: 4.5V to 140V (150V Abs Max)
  • Wide Output Voltage Range: 1V ≤ VOUT ≤ 60V
  • Low Operating IQ: 16µA (48VIN to 12VOUT and 3.3VOUT)
  • Adjustable Gate Drive Level Up to 10V
  • Optional Spread Spectrum Operation
  • Very Low Dropout: 100% Duty Cycle Operation
  • Low IQ in Dropout: 78μA (One Channel On)
  • RSENSE or Inductor DCR Current Sensing
  • Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
  • Phase-Lockable Frequency (75kHz to 720kHz)
  • Programmable Fixed Frequency (50kHz to 750kHz)
  • Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode® Operation at Light Loads
  • Onboard LDO or External NMOS LDO for DRVCC
  • EXTVCC LDO Powers Drivers from VOUT
  • Programmable Input Overvoltage Lockout
  • 48-Lead (7mm × 7mm) eLQFP Package

Typical Application

LTC7810 Typical Application
LTC7810 Typical Application

Description

The LTC®7810 is a high performance dual step-down DC/ DC switching regulator controller that drives all N-channel synchronous power MOSFET stages that can operate from voltages up to 140V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 720kHz.

The low no-load quiescent current extends operating run time in battery-powered systems. The LTC7810 features a precision 1V reference, enabling the output voltage to be programmed from 1V to 60V. The gate drive voltage for the LTC7810 can be programmed to 6V, 8V, or 10V to allow the use of logic-level or standard-threshold FETs and to maximize efficiency.

The LTC7810 additionally features spread spectrum operation which significantly reduces the peak radiated and conducted noise on both the input and output supplies, making it easier to comply with electromagnetic interference (EMI) standards.

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC7810ELXE#PBF 7mm x 7mm LQFP-48 LXE E 05-08-1832 Yes
LTC7810HLXE#PBF 7mm x 7mm LQFP-48 LXE H 05-08-1832 Yes
LTC7810ILXE#PBF 7mm x 7mm LQFP-48 LXE I 05-08-1832 Yes


LTC7810 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
(1-99)
Price
(1k)*
RoHS
LTC7810ELXE#PBF 7mm x 7mm LQFP-48 E $7.43 $5.20 Yes
LTC7810HLXE#PBF 7mm x 7mm LQFP-48 H $9.07 $6.35 Yes
LTC7810ILXE#PBF 7mm x 7mm LQFP-48 I $8.57 $6.00 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.

Click here to view our complete list of demo boards

Applications

  • Automotive and Transportation
  • Industrial and Telecommunications
  • Military/Avionics

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support