LT3502
LT3502A
Info: : PRODUCTION
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LT3502
LT3502A

1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 16
1ku List Price Starting From $2.35
Features
  • 3V to 40V Input Voltage Range
  • 500mA Output Current
  • Switching Frequency: 2.2MHz (LT3502A), 1.1MHz (LT3502)
  • 800mV Feedback Voltage
  • Short-Circuit Robust
  • Soft-Start
  • Low Shutdown Current: <2μA
  • Internally Compensated
  • Internal Boost Diode
  • Thermally Enhanced 2mm × 2mm 8-Lead DFN and 10-Lead MS10 Package
Additional Details
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The LT3502/LT3502A are current mode PWM step-down DC/DC converters with an internal 500mA power switch, in tiny 8-lead 2mm × 2mm DFN and 10-lead MS10 packages. The wide input voltage range of 3V to 40V makes the LT3502/LT3502A suitable for regulating power from a wide variety of sources, including 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and capacitors, resulting in a very small solution. Constant frequency above the AM band avoids interfering with radio reception, making the LT3502A particularly suitable for automotive applications.

Cycle-by-cycle current limit and frequency foldback provide protection against shorted outputs. Soft-start and frequency foldback eliminates input current surge during start-up. DA current sense provides further protection in fault conditions. An internal boost diode reduces component count.

Applications

  • Automotive Systems
  • Battery-Powered Equipment
  • Wall Transformer Regulation
  • Distributed Supply Regulation
Part Models 16
1ku List Price Starting From $2.35

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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

Jul 12, 2022

- 22_0157

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

Jun 21, 2022

- 22_0050

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

Feb 4, 2020

- 20_0130

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

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LT3502IMS#PBF

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PRODUCTION

Apr 18, 2022

- 22_0050

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

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Jul 12, 2022

- 22_0157

arrow down

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

Jun 21, 2022

- 22_0050

arrow down

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

Feb 4, 2020

- 20_0130

arrow down

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

LT3502AEMS#PBF

PRODUCTION

LT3502AEMS#TRPBF

PRODUCTION

LT3502AIMS#PBF

PRODUCTION

LT3502AIMS#TRPBF

PRODUCTION

LT3502EMS#PBF

PRODUCTION

LT3502EMS#TRPBF

PRODUCTION

LT3502IMS#PBF

PRODUCTION

LT3502IMS#TRPBF

PRODUCTION

Apr 18, 2022

- 22_0050

arrow down

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

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

reference details image

DC1221A

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator in DFN

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DC1221A

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator in DFN

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator in DFN

Product Detail

Demonstration circuit 1221 is a monolithic step-down DC/DC switching regualtor featuring the LT3502. The demo circuit is designed for 3.3V output from a 5V to 40V input. The wide input range of the LT3502 allows a variety of input sources including automotive batteries and 24V industrial supplies.




reference details image

DC1221B

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator

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DC1221B

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator

Product Detail

Demo circuit DC1221B is a monolithic step-down DC/DC switching regulator featuring the LT3502. The demo circuit is designed for 3.3V output from a 4.5V to 40V input. The wide input range of the LT3502 allows a variety of input sources including automotive batteries and 24V industrial supplies. The high switching frequency allows the use of tiny, low cost external components. The current mode control scheme creates fast transient response and good loop stability. The boost diode is internal to reduce component count. The SHDN pin can also be used to program soft start. In this mode, the SHDN pin is driven through an external RC filter to create a voltage ramp on this pin. The soft start function reduces the input current surge during start-up. Cycle by cycle current limit and frequency foldback provide the protection against shorted outputs. DA pin can further protect the silicon under fault conditions by sensing the diode current.


 


reference details image

DC1089B

LT3502AEDC Demo Board | 7V to 40V Input to 5V at 500mA

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DC1089B

LT3502AEDC Demo Board | 7V to 40V Input to 5V at 500mA

LT3502AEDC Demo Board | 7V to 40V Input to 5V at 500mA

Product Detail

Demonstration circuit 1089 is a monolithic step-down DC/DC switching regulator featuring the LT3502A. The demo circuit is designed for 5V output from a 7V to 40V input. The wide input range of the LT3502A allows a variety of input sources including automotive batteries and 24V industrial supplies. The high switching frequency allows the use of tiny, low cost external components. Constant switching frequency above the AM band avoids interfering with radio reception. The current mode control scheme creates fast transient response and good loop stability. The boost diode is internal to reduce component count. The SHDN pin can also be used to program soft start. In this mode, the SHDN pin is driven through an external RC filter to create a voltage ramp on this pin. The soft start function reduces the input current surge during start-up. Cycle by cycle current limit and frequency foldback provide the protection against shorted outputs. DA pin can further protect the silicon under fault conditions by sensing the diode current.



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

Figure 1. EVAL-CN0506-FMCZ Simplified Block Diagram (All Connections and Decoupling Not Shown)

10 Mbps/100 Mbps/1000 Mbps Dual Channel, Low Power Industrial Ethernet PHY

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CN0506

10 Mbps/100 Mbps/1000 Mbps Dual Channel, Low Power Industrial Ethernet PHY

CN0506

Circuits from the lab

tooltip Info:Circuits from the lab
10 Mbps/100 Mbps/1000 Mbps Dual Channel, Low Power Industrial Ethernet PHY

Features and Benefits

  • Supports RGMII, RMII, and MII modes
  • Dual ports allow for ring or line topologies
  • Can drive 154m of cable at 1000Mbsps
View Detailed Reference Design external link

Design & Integration Tools

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