LTC3899

RECOMMENDED FOR NEW DESIGNS

60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller with PassThru

Data Sheet (Rev. B) Product Selection Table
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Overview

  • Dual Buck Plus Single Boost Synchronous Controllers
  • Wide Bias Input Voltage Range: 4.5V to 60V
  • Outputs Remain in Regulation Through Cold Crank Down to a 2.2V Input Supply Voltage
  • Buck and Boost Output Voltages Up to 60V
  • Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
  • No External Bootstrap Diodes Required
  • Low Operating IQ: 29μA (One Channel On)
  • 100% Duty Cycle for Boost Synchronous MOSFET
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Very Low Dropout Operation: 99% Duty Cycle (Bucks)
  • Low Shutdown IQ: 3.6μA
  • Fixed or Adjustable Boost Output Voltage Saves IQ
  • Small 38-Lead 5mm × 7mm QFN and TSSOP Packages
  • AEC-Q100 Qualified for Automotive Applications
LTC3899
60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller with PassThru
High Efficiency Wide Input Range Dual 5V/8.5V Converter Efficiency vs Output Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Hot Swap Controllers 1
LTC4364
RECOMMENDED FOR NEW DESIGNS Surge Stopper with Ideal Diode
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3899

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

  • LTC3899(BOOST)
  • LTC3899(BUCK)
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
DC1898A

LTC3899EFE Demo Board | Triple Buck/Buck/Boost Controller, VOUT3 Powers VOUT1/VOUT2; 2.5V ≤ VIN ≤ 60V; VOUT1 = 5V @ 5A, VOUT2 = 8.5V @ 3A, VOUT3 = 10V @ 5.5A

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Product Details

Demonstration circuit 1898A is a triple output synchronous step-up/dual step-down supply featuring the LTC3899EFE. The circuit is using a drop-in layout: the main buck circuit components fit in an area of ¾˝ × 1½˝, while the main boost circuit area is ¾˝ × 1¾˝. The package style for the LTC3899EFE is a 38-pin exposed pad TSSOP package.

eval board
schematic 2
DC1898A

LTC3899EFE Demo Board | Triple Buck/Buck/Boost Controller, VOUT3 Powers VOUT1/VOUT2; 2.5V ≤ VIN ≤ 60V; VOUT1 = 5V @ 5A, VOUT2 = 8.5V @ 3A, VOUT3 = 10V @ 5.5A

Buy Now View Details

Product Details

Demonstration circuit 1898A is a triple output synchronous step-up/dual step-down supply featuring the LTC3899EFE. The circuit is using a drop-in layout: the main buck circuit components fit in an area of ¾˝ × 1½˝, while the main boost circuit area is ¾˝ × 1¾˝. The package style for the LTC3899EFE is a 38-pin exposed pad TSSOP package.
DC1898A
LTC3899EFE Demo Board | Triple Buck/Buck/Boost Controller, VOUT3 Powers VOUT1/VOUT2; 2.5V ≤ VIN ≤ 60V; VOUT1 = 5V @ 5A, VOUT2 = 8.5V @ 3A, VOUT3 = 10V @ 5.5A
DC1898A - Schematic
DC1898A
LTC3899EFE Demo Board | Triple Buck/Buck/Boost Controller, VOUT3 Powers VOUT1/VOUT2; 2.5V ≤ VIN ≤ 60V; VOUT1 = 5V @ 5A, VOUT2 = 8.5V @ 3A, VOUT3 = 10V @ 5.5A
DC1898A - Schematic

Reference Designs

Portable Radio Reference Design Block Diagram
Portable Radio Reference Design Block Diagram
Final Enclosure of the ADRV-PACKRF
CN0412 Circuits from the lab

ADRV-PACKRF Robust Portable Radio Design

View Detailed Reference Design

Features and Benefits

  • Two Complete Radios
    • 2-Tx, 2-Rx, 2-Observation
  • Multiple Power Options
    • Wall Connected, Power over Ethernet, Battery
  • Built in IMU and GPS for tracking
  • Fully configurable and customizable software
CN0412
ADRV-PACKRF Robust Portable Radio Design
Portable Radio Reference Design Block Diagram
Final Enclosure of the ADRV-PACKRF

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