LT3503

PRODUCTION

1A, 2.2MHz Step-Down Switching Regulator in 2mm x 3mm DFN

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Part Details

  • Wide Input Range: 3.6V to 20V
  • 5V at 1.2A from 11V to 18V Input
  • 5V at 1A from 7.2V to 18V Input
  • 3.3V at 1.2A from 8.5V to 12V Input
  • 3.3V at 1A from 5.5V to 12V Input
  • Fixed Frequency Operation: 2.2MHz
  • Output Adjustable Down to 780mV
  • Short-Circuit Robust
  • Uses Tiny Capacitors and Inductors
  • Soft-Start
  • Internally Compensated
  • Low Shutdown Current: <2µA
  • Low VCESAT Switch: 400mV at 1A
  • Thermally Enhanced, 2mm × 3mm 6-Pin DFN Low Profile Package
LT3503
1A, 2.2MHz Step-Down Switching Regulator in 2mm x 3mm DFN
3.3V Step-Down Converter Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

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Protection Switches & Controllers 1
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Switching Regulators & Controllers 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT3503
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
DC1050A

LT3503EDCB Demo Board | 4.5 ≤ VIN ≤ 20V, VOUT = 3.3V at 1.2A

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Product Details

Demonstration circuit 1050 is a monolithic step-down DC/DC switching regulator featuring the LT3503. The demo board is designed for a 3.3V/1.2A output from a 4.5V to 20V input. The 2.2MHz switching frequency allows the use of small, low cost external components and results in a low, predictable output ripple.

DC1050A
LT3503EDCB Demo Board | 4.5 ≤ VIN ≤ 20V, VOUT = 3.3V at 1.2A
DC1050A - Schematic

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