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LT3480 - 36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current

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 x 3mm) DFN Packages

Typical Application

LT3480 Typical Application
LT3480 Typical Application

Description

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 x 3mm DFN packages with exposed pads for low thermal resistance.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

DFN-10, MS-10

LT3480 Package Drawing
LT3480 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3480DWF 0 View
LT3480EDD#PBF DFN 10 E $4.93 $3.45 View
LT3480EDD#TRPBF DFN 10 E $3.51 View
LT3480EMSE#PBF MSOP 10 E $5.07 $3.55 View
LT3480EMSE#TRPBF MSOP 10 E $3.61 View
LT3480HMSE#PBF MSOP 10 H $6.44 $4.51 View
LT3480HMSE#TRPBF MSOP 10 H $4.57 View
LT3480IDD#PBF DFN 10 I $5.91 $4.14 View
LT3480IDD#TRPBF DFN 10 I $4.20 View
LT3480IMSE#PBF MSOP 10 I $6.09 $4.26 View
LT3480IMSE#TRPBF MSOP 10 I $4.32 View
LT3480MPMSE#PBF MSOP 10 MP $16.43 $11.50 View
LT3480MPMSE#TRPBF MSOP 10 MP $11.56 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1091A LT3480EMSE Demo Board $125.00
DC1212A-A LT3480EDD Demo Board I 2A, 38V Step-down Switching $100.00
DC1394A LT3480EDD DEMO BOARD | 36V, 2A, 2.4MHz Step-Down S Contact Factory
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Click here to view our complete list of demo boards

Applications

  • Automotive Battery Regulation
  • Power for Portable Products
  • Distributed Supply Regulation
  • Industrial Supplies

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Related models available in LTspice IV
LT3480

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