LTC3899
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LTC3899

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

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LTspice LTC3899 - Step-Down (Buck) Regulators Download 7.32 KB
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
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file View Data Sheet (Rev.B)
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LTspice LTC3899 - Step-Down (Buck) Regulators Download 7.32 KB
Part Models 24
1ku List Price Starting From $5.90
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LTC3899

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UPDATED 09/23/2015
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LTC3899: 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller Data Sheet (Rev.B)

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UPDATED 04/07/2015
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LTC3899: 低静止電流の60V、トリプル出力、降圧/降圧/昇圧同期整流式コントローラ データシート

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UPDATED 03/26/2018
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Documentation

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2017-09-18

LTC3899 Video Product Brief

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3899EFE#PBF 38-Lead TSSOP w/ EP external-link
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LTC3899EUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899EUHF#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899HFE#PBF 38-Lead TSSOP w/ EP external-link
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LTC3899HFE#TRPBF 38-Lead TSSOP w/ EP external-link
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LTC3899HFE#WPBF 38-Lead TSSOP w/ EP external-link
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LTC3899HFE#WTRPBF 38-Lead TSSOP w/ EP external-link
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LTC3899HUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899HUHF#WPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899HUHF#WTRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899IFE#PBF 38-Lead TSSOP w/ EP external-link
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LTC3899IFE#TRPBF 38-Lead TSSOP w/ EP external-link
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LTC3899IUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899IUHF#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899IUHF#WPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899IUHF#WTRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899MPFE#PBF 38-Lead TSSOP w/ EP external-link
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LTC3899MPFE#TRPBF 38-Lead TSSOP w/ EP external-link
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LTC3899MPUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899MPUHF#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC3899EFE#PBF

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

LTC3899EFE#PBF

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LTC3899HFE#TRPBF

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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)

LTC3899EFE#PBF

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LTC3899EFE#TRPBF

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LTC3899EUHF#PBF

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LTC3899EUHF#TRPBF

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LTC3899IUHF#TRPBF

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LTC3899MPUHF#TRPBF

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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

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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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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.

Resources

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DC1898A - Schematic Download

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DC1898A - Design Files Download

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DC1898A - Demo Manual Download

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Evaluation Kits1

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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
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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LTC3899 - Step-Down (Buck) Regulators Download

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Reference Designs

Reference Designs 1

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Design & Integration Tools

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