LTC3899
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3899

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 24
1ku List Price Starting From $5.90
Features
  • 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
Additional Details
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The LTC3899 is a high performance triple output (buck/ buck/boost) DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. The constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. The LTC3899 operates from a wide 4.5V to 60V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC3899 can operate from an input supply as low as 2.2V after start-up.

The gate drive for the LTC3899 can be programmed from 5V to 10V to allow the use of logic-level or standard-level FETs and to maximize efficiency. Internal switches in the top gate drivers eliminate the need for external bootstrap diodes. The 29μA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values.

APPLICATIONS

  • Automotive Always-On and Start-Stop Systems
  • Distributed DC Power Systems
  • Multioutput Buck-Boost Applications
Part Models 24
1ku List Price Starting From $5.90

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Apr 6, 2022

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3899EFE#PBF

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Jul 31, 2020

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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Apr 6, 2022

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3899EFE#PBF

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LTC3899MPFE#TRPBF

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Jul 31, 2020

- 20_0245

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3899EFE#PBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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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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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

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

Product Detail

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.

Tools & Simulations

Tools & Simulations 2

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.

Reference Designs

Reference Designs 1

Portable Radio Reference Design Block Diagram

ADRV-PACKRF Robust Portable Radio Design

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CN0412

ADRV-PACKRF Robust Portable Radio Design

CN0412

Circuits from the lab

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ADRV-PACKRF Robust Portable Radio 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
View Detailed Reference Design external link

Design & Integration Tools

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