LTC3895
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3895

150V Low IQ, 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 6
1ku List Price Starting From $5.61
Features
  • Wide VIN Range: 4V to 140V (150V Abs Max)
  • Wide Output Voltage Range: 0.8V to 60V
  • Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE)
  • Low Operating IQ: 40μA (Shutdown = 10μA)
  • 100% Duty Cycle Operation
  • No External Bootstrap Diode Required
  • Selectable Gate Drive UVLO Thresholds
  • Onboard LDO or External NMOS LDO for DRVCC
  • EXTVCC LDO Powers Drivers from VOUT
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • Adjustable Burst Clamp and Current Limit
  • Adjustable or Fixed (5V/3.3V) Output Voltage
  • Power Good Output Voltage Monitor
  • Programmable Input Overvoltage Lockout
  • 38-Lead TSSOP High Voltage Package
Additional Details
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The LTC3895 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz.

The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs to maximize efficiency. An integrated switch in the top gate driver eliminates the need for an external bootstrap diode. An internal charge pump allows for 100% duty cycle operation.

The low 40μA 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. The LTC3895 features a precision 0.8V reference and power good output indicator. The output voltage can be programmed between 0.8V to 60V using external resistors or pin-programmed for a fixed 5V or 3.3V.

Applications

  • Automotive and Industrial Power Systems
  • High Voltage Battery Operated Systems
  • Telecommunications Power Systems
Part Models 6
1ku List Price Starting From $5.61

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3895EFE#PBF
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LTC3895IFE#PBF
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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

LTC3895EFE#PBF

PRODUCTION

LTC3895EFE#TRPBF

PRODUCTION

LTC3895HFE#PBF

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LTC3895HFE#TRPBF

PRODUCTION

LTC3895IFE#PBF

PRODUCTION

LTC3895IFE#TRPBF

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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

LTC3895EFE#PBF

PRODUCTION

LTC3895EFE#TRPBF

PRODUCTION

LTC3895HFE#PBF

PRODUCTION

LTC3895HFE#TRPBF

PRODUCTION

LTC3895IFE#PBF

PRODUCTION

LTC3895IFE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2117A

LTC3895EFE Demo Board | Synchronous Buck, 14V ≤ VIN ≤ 130V, 150VPK; VOUT = 12V @ 5A

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DC2117A

LTC3895EFE Demo Board | Synchronous Buck, 14V ≤ VIN ≤ 130V, 150VPK; VOUT = 12V @ 5A

LTC3895EFE Demo Board | Synchronous Buck, 14V ≤ VIN ≤ 130V, 150VPK; VOUT = 12V @ 5A

Product Detail

Demonstration circuit 2117A is a single output high voltage nonisolated synchronous step-down converter that drives all N-channel MOSFET power stage. It features the LTC3895EFE, a high voltage step-down DC/DC controller housed in a TSSOP-38 package with several pins removed for high voltage spacing.

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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