LT3695 Series

PRODUCTION

1A Fault Tolerant Micropower Step-Down Regulator

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Part Details

  • Wide Input Range:
    • Operation from 3.6V to 36V
    • Overvoltage Lockout Protects Circuits Through 60V Transients
  • FMEA Fault Tolerant:
    • Output Stays at or Below Regulation Voltage
    • During Adjacent Pin Short or When a Pin Is Left Floating
  • 1A Output Current
  • Low Ripple (< 15mVP-P) Burst Mode® Operation
    • IQ = 75μA for 12VIN to 3.3VOUT with No Load
  • Adjustable Switching Frequency: 250kHz to 2.2MHz
  • Short-Circuit Protected
  • Synchronizable Between 300kHz and 2.2MHz
  • Output Voltage: 0.8V to 20V
  • Power Good Flag
  • Fixed Output Voltage Versions for 3.3V and 5V Available
  • Small, Thermally Enhanced 16-Pin MSOP Package
LT3695 Series
1A Fault Tolerant Micropower Step-Down Regulator
5V Step-Down Converter Efficiency Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

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

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Power System Management (PSM) & Sequencers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 2
LTC4364
RECOMMENDED FOR NEW DESIGNS Surge Stopper with Ideal Diode
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT3695
  • LT3695-3.3
  • LT3695-5
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
DC1578A-B

LT3695EMSE-5 Demo Board | Fault-Tolerant, 6.9V ≤ VIN ≤ 36/60V, VOUT = 5V @ 1A

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Product Details

Demonstration circuit 1578A-B is a micropower monolithic step-down DC/DC switching regulator featuring the fixed 5V output LT3695-5. The demo board operates from 6.9V to 36V and can withstand input voltage transients up to 60V. It provides 5V @ 1A at its output. The LT3695 family tolerates adjacent pin shorts or an open pin without raising the output voltage above its programmed value.

eval board
schematic 2
DC1519A

LT3695EMSE Demo Board | Fault-Tolerant, 6.9V ≤ VIN ≤ 36/60V, VOUT = 5V @ 1A

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Product Details

Demonstration circuit 1591A is a monolithic step-down switching regulator featuring the LT3695EMSE. The demo board is designed for 5V/1A output from a 6.9V to 36V input, with transients up to 60V. The LT3695 tolerates adjacent pin shorts or an open pin without raising the output voltage above its programmed value.

eval board
schematic 3
DC1578A-A

LT3695EMSE-3.3 Demo Board | Fault-Tolerant, 4.5V ≤ VIN ≤ 36/60V, VOUT = 3.3V @ 1A

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Product Details

Demonstration circuit 1578A-A is a micropower monolithic step-down DC/DC switching regulator featuring the fixed 3.3V output LT3695-3.3. The demo board operates from 4.5V to 36V and can withstand input voltage transients up to 60V. It provides 3.3V @ 1A at its output. The LT3695 family tolerates adjacent pin shorts or an open pin without raising the output voltage above its programmed value.
DC1578A-B
LT3695EMSE-5 Demo Board | Fault-Tolerant, 6.9V ≤ VIN ≤ 36/60V, VOUT = 5V @ 1A
DC1578A-A - Schematic
DC1519A
LT3695EMSE Demo Board | Fault-Tolerant, 6.9V ≤ VIN ≤ 36/60V, VOUT = 5V @ 1A
DC1519A - Schematic
DC1578A-A
LT3695EMSE-3.3 Demo Board | Fault-Tolerant, 4.5V ≤ VIN ≤ 36/60V, VOUT = 3.3V @ 1A
DC1578A-A - Schematic

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