LTC3862
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LTC3862

Multi-Phase Current Mode Step-Up DC/DC Controller

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Models 22
1ku List Price Starting From $3.95
Features
  • Wide VIN Range: 4V to 36V Operation
  • 2-Phase Operation Reduces Input and Output Capacitance
  • Fixed Frequency, Peak Current Mode Control
  • 5V Gate Drive for Logic-Level MOSFETs
  • Adjustable Slope Compensation Gain
  • Adjustable Max Duty Cycle (Up to 96%)
  • Adjustable Leading Edge Blanking
  • ±1% Internal Voltage Reference
  • Programmable Operating Frequency with One External Resistor (75kHz to 500kHz)
  • Phase-Lockable Fixed Frequency 50kHz to 650kHz
  • SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or 12-Phase Operation (PHASEMODE Programmable)
  • Internal 5V LDO Regulator
  • 24-Lead Narrow SSOP Package
  • 5mm × 5mm QFN with 0.65mm Lead Pitch and 24-Lead Thermally Enhanced TSSOP Packages
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC3862 is a two phase constant frequency, current mode boost and SEPIC controller that drives N-channel power MOSFETs. Two phase operation reduces system filtering capacitance and inductance requirements.

The operating frequency can be set with an external resistor over a 75kHz to 500kHz range and can be synchronized to an external clock using the internal PLL. Multi-phase operation is possible using the SYNC input, the CLKOUT output and the PHASEMODE control pin allowing 2-, 3-, 4-, 6- or 12-phase operation.

Other features include an internal 5V LDO with undervoltage lockout protection for the gate drivers, a precision RUN pin threshold with programmable hysteresis, soft-start and programmable leading edge blanking and maximum duty cycle.

Part Number Vin Range INTVcc VIN ON VIN OFF
LTC3862 4V to 36V 5V 3.3V 2.9V
LTC3862-1 8.5V to 36V 10V 7.5V 7.0V
LTC3862-2 5.5V to 36V 10V 4.4V 3.9V

APPLICATIONS

  • Automotive, Telecom and Industrial Power Supplies
Part Models 22
1ku List Price Starting From $3.95

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Documentation

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

- 22_0068

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

LTC3862EFE#PBF

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Oct 3, 2024

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(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

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Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

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PCN

Apr 6, 2022

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

LTC3862EFE#PBF

PRODUCTION

LTC3862EFE#TRPBF

PRODUCTION

LTC3862HFE#PBF

PRODUCTION

LTC3862HFE#TRPBF

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LTC3862HFE#WPBF

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LTC3862IFE#PBF

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LTC3862IFE#TRPBF

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LTC3862IFE#WPBF

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Oct 3, 2024

- 24_0235

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(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

LTC3862EGN#PBF

PRODUCTION

LTC3862EGN#TRPBF

PRODUCTION

LTC3862HGN#PBF

PRODUCTION

LTC3862HGN#TRPBF

PRODUCTION

LTC3862IGN#PBF

PRODUCTION

LTC3862IGN#TRPBF

PRODUCTION

Aug 10, 2022

- 22_0177

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Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC3862EGN#PBF

PRODUCTION

LTC3862EGN#TRPBF

PRODUCTION

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Software & Part Ecosystem

Evaluation Kits 1

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DC1286A-A

LTC3862EGN Demo Board | 5V to 36VIN, 48VOUT @ 5A, Multiphase Boost Controller

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DC1286A-A

LTC3862EGN Demo Board | 5V to 36VIN, 48VOUT @ 5A, Multiphase Boost Controller

LTC3862EGN Demo Board | 5V to 36VIN, 48VOUT @ 5A, Multiphase Boost Controller

Product Detail

Demonstration circuit 1286A is DC/DC boost converter featuring the LTC3862EGN/-1 constant frequency current mode boost controllers. The DC1286A-A (LTC3862) operates over 5V to 36V input and provides 2A-5A of output current at 48V output. The DC1286A-B (LTC3862-1, higher VIN min and higher gate drive) operates over 8V to 36V input and provides 3A-5A of output current at 48V output. The 200kHz constant frequency operation results in small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages.

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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