LT3480
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LT3480

36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $4.13
Features
  • Wide Input Range:
    • Operation from 3.6V to 36V
    • Over-Voltage Lockout Protects Circuits through 60V Transient
  • 2A Maximum Output Current
  • Low Ripple Burst Mode® Operation
    • 70µA IQ at 12VIN to 3.3VOUT
    • Output Ripple < 15mV
  • Adjustable Switching Frequency: 200kHz to 2.4MHz
  • Low Shutdown Current: IQ < 1µA
  • Integrated Boost Diode
  • Synchronizable Between 250kHz to 2MHz
  • Power Good Flag
  • Saturating Switch Design: 0.25Ω On-Resistance
  • 0.790V Feedback Reference Voltage
  • Output Voltage: 0.79V to 20V
  • Soft-Start Capability
  • Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages
Additional Details
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The LT3480 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 36V (60V maximum). A high efficiency 0.25Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3480 can further enhance low output current efficiency by drawing bias current from the output when VOUT is above 3V. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 86% of the programmed output voltage. The LT3480 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.

Applications

  • Automotive Battery Regulation
  • Power for Portable Products
  • Distributed Supply Regulation
  • Industrial Supplies
Part Models 12
1ku List Price Starting From $4.13

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Documentation

Documentation

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

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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Jul 12, 2022

- 22_0157

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

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Jun 21, 2022

- 22_0050

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

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Mar 25, 2021

- 21_0069

Test Platform Conversion for LT3480 MSOP

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Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

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LT3480HMSE#PBF

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LT3480HMSE#TRPBF

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Filter by Model

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PCN

Oct 11, 2022

- 22_0244

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3480EMSE#PBF

PRODUCTION

LT3480EMSE#TRPBF

PRODUCTION

LT3480IMSE#PBF

PRODUCTION

LT3480IMSE#TRPBF

PRODUCTION

Jul 12, 2022

- 22_0157

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

LT3480EMSE#PBF

PRODUCTION

LT3480EMSE#TRPBF

PRODUCTION

LT3480IMSE#PBF

PRODUCTION

LT3480IMSE#TRPBF

PRODUCTION

Jun 21, 2022

- 22_0050

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT3480EMSE#PBF

PRODUCTION

LT3480EMSE#TRPBF

PRODUCTION

LT3480IMSE#PBF

PRODUCTION

LT3480IMSE#TRPBF

PRODUCTION

Mar 25, 2021

- 21_0069

arrow down

Test Platform Conversion for LT3480 MSOP

LT3480EMSE#PBF

PRODUCTION

LT3480EMSE#TRPBF

PRODUCTION

LT3480IMSE#PBF

PRODUCTION

LT3480IMSE#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0130

arrow down

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LT3480EMSE#PBF

PRODUCTION

LT3480EMSE#TRPBF

PRODUCTION

LT3480HMSE#PBF

PRODUCTION

LT3480HMSE#TRPBF

PRODUCTION

LT3480IMSE#PBF

PRODUCTION

LT3480IMSE#TRPBF

PRODUCTION

LT3480MPMSE#PBF

PRODUCTION

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PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

reference details image

DC1212A-A

LT3480EDD Demo Board | (DFN) EN55022 Compliant, Micropower, 6.3V ≤ VIN ≤ 38V (60V Transients), VOUT = 5V at 2A

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DC1212A-A

LT3480EDD Demo Board | (DFN) EN55022 Compliant, Micropower, 6.3V ≤ VIN ≤ 38V (60V Transients), VOUT = 5V at 2A

LT3480EDD Demo Board | (DFN) EN55022 Compliant, Micropower, 6.3V ≤ VIN ≤ 38V (60V Transients), VOUT = 5V at 2A

Product Detail

Demonstration circuit 1212A-A is a monolithic step-down DC/DC switching regulatro featuring the LT3480 in the 3 × 3 DFN-10 package. The demo board provides 5V at 2A from a 6.3V to 38V input and has transient protection up to 60V. The demo boards default switching frequency is 800kHz, but the LT3480 has a SYNC pin which allows frequency synchronization to an external clock over a 250kHz to 2MHz range. The LT3480's quiescent current is 70uA, while the LT3685 has a 0.9mA quiescent current. 


An EMC filter at the input makes the circuit compatible with EMC standard EN55022 Class B.

reference details image

DC1091A

LT3480EMSE Demo Board | (MSOP) 6.3V ≤ VIN ≤ 38V (60V Transients), VOUT = 5V @ 2A

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DC1091A

LT3480EMSE Demo Board | (MSOP) 6.3V ≤ VIN ≤ 38V (60V Transients), VOUT = 5V @ 2A

LT3480EMSE Demo Board | (MSOP) 6.3V ≤ VIN ≤ 38V (60V Transients), VOUT = 5V @ 2A

Product Detail

Demonstration circuit 1091 is a monolithic step-down switching regulator featuring the LT3480 in the MSOP-10 exposed pad package. The operating frequency can be synchronized up to 2MHz. The demo board is designed for 5V/2A output from a 6.3V to 38V input with transients up to 60V. The wide input range of the LT3480 allows a variety of input sources. The typical sources are automotive batteries, wall adaptors and industrial supplies. The modes of operation (Burst Mode and fixed frequency) are jumper selectable.

reference details image

DC1394A

LT3480 HV Buck Regulator Board with Plug in Interface

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DC1394A

LT3480 HV Buck Regulator Board with Plug in Interface

LT3480 HV Buck Regulator Board with Plug in Interface

Product Detail

Demonstration Circuit 1394A shows how the LT3480 high voltage step-down regulator can be used with the LTC4098 USB-compatible Li-Ion battery charger to design a 2 input source battery charger circuit that also provides power to the load from the LT3480, a 5V wall adapter or the batteries based on available power. The LTC4098 interfaces with a number of ADI switching regulators to provide a high efficiency, high voltage power path. The LT3480 operates from 8V to 38V (60V transients) and provides 2A with a voltage range that is mode and load dependent.

Tools & Simulations

Tools & Simulations 1

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.

Reference Designs

Reference Designs 1

DK-VIDEO-4SGX230N Dev Kit

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altera-audio-video-development-kit-stratix-iv-gx-edition

altera-audio-video-development-kit-stratix-iv-gx-edition

Circuits from the lab

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Features and Benefits

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  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
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