LTC7800

RECOMMENDED FOR NEW DESIGNS

Low IQ , 60V, High Frequency Synchronous Step-Down Controller

Data Sheet Product Selection Table
Part Models
6
1ku List Price
Starting From $4.15
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Part Details

  • Wide VIN Range: 4V to 60V (65V Abs Max)
  • Low Operating IQ : 50μA
  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
  • RSENSE or DCR Current Sensing
  • Phase-Lockable Frequency (320kHz to 2.25MHz)
  • Programmable Fixed Frequency (320kHz to 2.25MHz)
  • Selectable Continuous, Pulse-Skipping or Low Ripple
  • Burst Mode® Operation at Light Load
  • Selectable Current Limit
  • Very Low Dropout Operation: 98% Duty Cycle
  • Adjustable Output Voltage Soft-Start or Tracking
  • Power Good Output Voltage Monitor
  • Output Overvoltage Protection
  • Low Shutdown IQ : < 14μA
  • Internal LDO Powers Gate Drive from VIN or EXTVCC
  • No Current Foldback During Start-Up
  • Small 20-Pin 3mm × 4mm QFN Package
LTC7800
Low IQ , 60V, High Frequency Synchronous Step-Down Controller
High Efficiency 3.3V 2.1MHz Step-Down Regulator Efficiency and Power Loss vs Output Current Package Image 1
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Data Sheet

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

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Hardware Ecosystem

Parts Product Life Cycle Description
High Voltage Hot Swap Controllers 1
LTC4380
RECOMMENDED FOR NEW DESIGNS Low Quiescent Current Surge Stopper
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC7800

LTpowerCAD 1

LTspice

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

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

eval board
schematic 1
schematic 2
schematic 3
DC2736A

LTC7800EUDC Demo Board | High Frequency Synchronous Buck Converter with GaN Transistors

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Product Details

Demonstration circuit 2736A is a single output high voltage nonisolated synchronous step-down converter that drives all GaN transistor power stage. It features the LTC7800, a low quiescent current high frequency (programmable fixed frequency from 320kHz up to 2.25MHz) synchronous step-down DC/DC controller housed in a small 3mm × 4mm QFN package.

This DC2736A operates over an input voltage range from 30V to 55V, while the LTC7800 can operate up to 60V. This demo board produces a 12V output voltage with up to 20A output current, and is configured with a sense resistor for current sensing. A mode selector allows the DC2736A to operate in forced continuous operation, pulse-skipping or Burst Mode® operation during light loads.

The LTC7800 features two integrated 5V gate drivers with 20ns dead time which is good for GaN transistors or logiclevel MOSFETs to maximize efficiency. The EXTVCC pin permits the LTC7800 to be powered from the output of the switching regulator or other available source, reducing power dissipation and improving efficiency. Please refer to the LTC7800 data sheet for a complete description of the part operation and application information.

eval board
schematic 4
schematic 5
schematic 6
DC2786A

LTC7800 Demo Board | 8 ≥ VIN ≥ 40V, VOUT = 3.3V @ 10A

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Product Details

Demonstration circuit 2786A is a single output high voltage non-isolated synchronous step-down converter that drives an all N-channel MOSFET power stage. It features the LTC7800, a low quiescent current high frequency (programmable fixed frequency from 320kHz up to 2.25MHz) synchronous step-down DC/DC controller housed in a small 3mm x 4mm QFN package.

This DC2786A operates over an input voltage range from 8V to 40V, while the LTC7800 can operate up to 60V. This demo board produces a 3.3V output voltage with up to 10A output current, and is configured with a sense resistor for current sensing. A mode selector allows the DC2786A to operate in forced continuous operation, pulse-skipping or Burst Mode® operation during light loads.

The LTC7800 features two integrated 5V gate drivers with 20ns deadtime which is good for GaN transistors or logic-level MOSFETs to maximize efficiency. The EXTVCC pin permits the LTC7800 to be powered from the output of the switching regulator or other available source, reducing power dissipation and improving efficiency. Please refer to the LTC7800 data sheet for a complete description of the part operation and application information.
DC2736A
LTC7800EUDC Demo Board | High Frequency Synchronous Buck Converter with GaN Transistors
DC2736A Evaluation Board DC2736A Evaluation Board - Top View DC2736A Evaluation Board - Bottom View
DC2786A
LTC7800 Demo Board | 8 ≥ VIN ≥ 40V, VOUT = 3.3V @ 10A
DC2786A Evaluation Board DC2786A Evaluation Board - Top View DC2786A Evaluation Board - Bottom View

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