LT3502
LT3502A

PRODUCTION

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

Data Sheet (Rev. F) Product Selection Table
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Overview

  • 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
  • AEC-Q100 Compliant with Exception
    • HBM ESD Classification Level 1C
LT3502
LT3502A
1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10
3.3V Step-Down Converter LT3502A 12VIN Efficiency Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 3

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Ideal Diodes and PowerPath Controllers 1
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
Temperature Sensors 1
LTC2991
RECOMMENDED FOR NEW DESIGNS Octal I2C Voltage, Current, and Temperature Monitor
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3502
  • LT3502A
LTspice

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.

Evaluation Kits

eval board
schematic 1
schematic 2
DC1221A

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

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Product Details

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.




eval board
schematic 3
DC1089B

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

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Product Details

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.



eval board
schematic 4
DC1221B

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

Buy Now View Details

Product Details

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.


 
DC1221A
LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator in DFN
DC1221A - Schematic DC1221A - Demo Board Image
DC1089B
LT3502AEDC Demo Board | 7V to 40V Input to 5V at 500mA
DC1089B - Schematic
DC1221B
LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator
DC1221B - Schematic

Reference Designs

Figure 1. EVAL-CN0506-FMCZ Simplified Block Diagram (All Connections and Decoupling Not Shown)
Figure 1. EVAL-CN0506-FMCZ Simplified Block Diagram (All Connections and Decoupling Not Shown)
EVAL-CN0506-FMCZ Evaluation Board
EVAL-CN0506-FMCZ Evaluation Board - Top View
EVAL-CN0506-FMCZ Evaluation Board - Bottom View
CN0506 Circuits from the lab

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

View Detailed Reference Design

Features and Benefits

  • Supports RGMII, RMII, and MII modes
  • Dual ports allow for ring or line topologies
  • Can drive 154m of cable at 1000Mbsps
CN0506
10 Mbps/100 Mbps/1000 Mbps Dual Channel, Low Power Industrial Ethernet PHY
Figure 1. EVAL-CN0506-FMCZ Simplified Block Diagram (All Connections and Decoupling Not Shown)
EVAL-CN0506-FMCZ Evaluation Board
EVAL-CN0506-FMCZ Evaluation Board - Top View
EVAL-CN0506-FMCZ Evaluation Board - Bottom View

Latest Discussions

4 Years Ago
LT3502 and LT8609: Alternate Part for XAL5020-222MEB and LQH43CN6R8M03L
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