LTC3892
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3892

60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

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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 $5.75
Features
  • Wide VIN Range: 4.5V to 60V (65V Abs Max)
  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 99% • VIN
  • Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
  • No External Bootstrap Diodes Required
  • Low Operating IQ: 29μA (One Channel On)
  • Selectable Gate Drive UVLO Thresholds
  • Out-of-Phase Operation Reduces Required Input Capacitance and Power Supply Induced Noise
  • Phase-Lockable Frequency: 75kHz to 850kHz
  • Selectable Continuous, Pulse Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • Selectable Current Limit (LTC3892/LTC3892-2)
  • Very Low Dropout Operation: 99% Duty Cycle
  • Power Good Output Voltage Monitors (LTC3892/LTC3892-2)
  • Low Shutdown IQ: 3.6μA
  • Small 32-Lead 5mm × 5mm QFN Package (LTC3892/LTC3892-2) or TSSOP Package (LTC3892-1)
Additional Details
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The LTC3892/LTC3892-1/LTC3892-2 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. Power loss and noise are minimized by operating the two controller output stages out-of-phase.

The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs and to maximize efficiency. Internal switches in the top gate drivers eliminate the need for external bootstrap diodes.

A wide 4.5V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Output voltages up to 99% of VIN can be regulated. OPTI-LOOP® compensation allows the transient response and loop stability to be optimized over a wide range of output capacitance and ESR values.

The 29μA no-load quiescent current extends operating run time in battery powered systems.

Applications

  • Automotive and Industrial Power Systems
  • Distributed DC Power Systems
  • High Voltage Battery Operated Systems
Part Models 24
1ku List Price Starting From $5.75

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Documentation

Documentation

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Apr 6, 2022

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 5

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DC2190A-B

LTC3892EFE-1 Demo Board | 2-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A

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DC2190A-B

LTC3892EFE-1 Demo Board | 2-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A

LTC3892EFE-1 Demo Board | 2-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A

Product Detail

Demonstration circuit 2190A is a high output voltage, high efficiency synchronous PolyPhase® buck converter featuring the LTC3892EFE-1. This demo circuit is available in two versions. The input voltage range of both versions is from 16V to 55V. The DC2190A-A is configured using two each LTC3892EFE-1 devices with 4-phase interleaving operation which provides a 12V/60A output, while the DC2190A-B is configured using one LTC3892EFE-1 device with 2-phase interleaving operation which provides a 12V/30A output.

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DC2190A-A

LTC3892EFE-1 Demo Board | LTC3892-1(×2) 4-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 60A

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DC2190A-A

LTC3892EFE-1 Demo Board | LTC3892-1(×2) 4-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 60A

LTC3892EFE-1 Demo Board | LTC3892-1(×2) 4-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 60A

Product Detail

Demonstration circuit 2190A is a high output voltage, high efficiency synchronous PolyPhase® buck converter featuring the LTC3892EFE-1. This demo circuit is available in two versions. The input voltage range of both versions is from 16V to 55V. The DC2190A-A is configured using two each LTC3892EFE-1 devices with 4-phase interleaving operation which provides a 12V/60A output, while the DC2190A-B is configured using one LTC3892EFE-1 device with 2-phase interleaving operation which provides a 12V/30A output.

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DC2493A

LTC3892EUH-2 Demo Board | 2-Phase Synchronous Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A

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DC2493A

LTC3892EUH-2 Demo Board | 2-Phase Synchronous Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A

LTC3892EUH-2 Demo Board | 2-Phase Synchronous Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A

Product Detail

Demonstration circuit 2493A is a high output voltage capable, high efficiency synchronous PolyPhase® buck converter featuring the LTC3892EUH-2. The DC2493A has a wide input voltage range from 16V to 55V, and is capable of delivering up to 30A of output current. The output voltage of the DC2493A is set to 12V, however, the output voltage can go as high as 55V, with certain modifications. The DC2493A supports three operation modes: fixed-frequency modulation, pulse-skipping mode and Burst Mode® operation. Fixed-frequency mode of operation reduces output voltage ripple, and yields a low noise switching spectrum. Burst Mode operation employs a variable frequency switching algorithm that minimizes the input quiescent current and improves efficiency at light loads.

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DC1998A

LTC3892EUHF Demo Board | Dual Sync Buck Controller, 6V ≤ VIN ≤ 60V; VOUT1 = 5V @ 8A, VOUT2 = 12V @ 5A

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DC1998A

LTC3892EUHF Demo Board | Dual Sync Buck Controller, 6V ≤ VIN ≤ 60V; VOUT1 = 5V @ 8A, VOUT2 = 12V @ 5A

LTC3892EUHF Demo Board | Dual Sync Buck Controller, 6V ≤ VIN ≤ 60V; VOUT1 = 5V @ 8A, VOUT2 = 12V @ 5A

Product Detail

Demonstration circuit 1998A is a high input voltage, high efficiency synchronous dual output buck converter featuring the LTC3892. The DC1998A has a wide input voltage range of 6V to 60V. The output voltages are set to 5V and 12V, however, the output voltage can be set almost as high as the input voltage (≤99% • VIN), with certain modifications. This demo board is capable of delivering up to 8A from the 5V output and up to 5A from the 12V output.

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DC2727A

LTC3892-2EUH Dual Output SEPIC And Buck Converter

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DC2727A

LTC3892-2EUH Dual Output SEPIC And Buck Converter

LTC3892-2EUH Dual Output SEPIC And Buck Converter

Product Detail

Demonstration circuit 2727A is a high input voltage, high efficiency dual output DC/DC converter. It features the LTC®3892‑2, a low IQ, dual output, 2-phase synchronous step-down DC/DC controller. This demo board operates over a 6V to 40V input voltage range and produces a 3.3V at 10A and a 12V at 3A output.

The 12V output is designed using a SEPIC converter which allows a stable output voltage from an input voltage that can be above, below or equal to the output voltage. The 3.3V is provided using a synchronous step-down converter. These output voltages can easily be changed with certain modifications.

The gate drive voltage can be adjusted from 5V to 10V allowing the use of logic or standard level MOSFETs. The DC2727A supports three operation modes: forced continuous mode, pulse-skipping and Burst Mode® operation during light loads. Forced continuous mode reduces output voltage ripple and yields a low noise switching spectrum. The pulse-skipping and burst modes increased efficiency at light loads.

Both outputs of the DC2727A switch out of phase to reduce input filtering. The DC2727A supports selectable current limit and provides very low dropout operation with its 99% duty cycle capability. The DC2727A has a standard operating frequency of 250kHz, but can be adjusted in a range between 75kHz and as high as 850kHz. In addition, the LTC3892-2 integrates the bootstrap diodes which simplifies the design.

The DC2727A was designed to support multiple footprints of input/output capacitors and inductors to accommodate variety of applications. The data sheet of LTC3892-2 gives a complete description and application information, and must be read in conjunction with this demo board manual for DC2727A.

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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