LT3434
Info: : PRODUCTION
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LT3434

High Voltage 3A, 200kHz Step-Down Switching Regulator with 100µA Quiescent Current

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Info: : PRODUCTION tooltip
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Part Details
Part Models 4
1ku List Price Starting From $6.95
Features
  • Wide Input Range: 3.3V to 60V
  • 3A Peak Switch Current
  • Burst Mode® Operation: 100µA Quiescent Current
  • Low Shutdown Current: IQ < 1µA
  • Power Good Flag with Programmable Threshold
  • Load Dump Protection to 60V
  • 200kHz Switching Frequency
  • Saturating Switch Design: 0.1Ω
  • Peak Switch Current Maintained Over Full Duty Cycle Range
  • 1.25V Feedback Reference Voltage
  • Easily Synchronizable
  • Soft-Start Capability
  • Small 16-Pin Thermally Enhanced TSSOP Package
Additional Details
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The LT3434 is a 200kHz monolithic buck switching regulator that accepts input voltages up to 60V. A high efficiency 3A, 0.1Ω switch is included on the die along with all the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability.

Innovative design techniques integrated in a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by employing Burst Mode operation at low currents, utilizing the output to bias the internal circuitry, and by using a supply boost capacitor to fully saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range. * Shutdown reduces input supply current to less than 1µA. External synchronization can be implemented by driving the SYNC pin with logic-level inputs. A single capacitor from the CSS pin to the output provides a controlled output voltage ramp (soft-start). The device also has a power good flag with a programmable threshold and time-out, and thermal shutdown protection.

The LT3434 is available in a 16-pin TSSOP package with exposed pad leadframe for low thermal resistance.

Applications

  • High Voltage Power Conversion
  • 14V and 42V Automotive Systems
  • Industrial Power Systems
  • Distributed Power Systems
  • Battery-Powered Systems
Part Models 4
1ku List Price Starting From $6.95

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3434EFE#PBF
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LT3434EFE#TRPBF
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LT3434IFE#PBF
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LT3434IFE#TRPBF
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3434EFE#PBF

PRODUCTION

LT3434EFE#TRPBF

PRODUCTION

LT3434IFE#PBF

PRODUCTION

LT3434IFE#TRPBF

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3434EFE#PBF

PRODUCTION

LT3434EFE#TRPBF

PRODUCTION

LT3434IFE#PBF

PRODUCTION

LT3434IFE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC614A

LT3434IFE Demo Board | 200kHz, VIN = 4V to 42V (60V Transients), VOUT = 3.3V @ 2A

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DC614A

LT3434IFE Demo Board | 200kHz, VIN = 4V to 42V (60V Transients), VOUT = 3.3V @ 2A

LT3434IFE Demo Board | 200kHz, VIN = 4V to 42V (60V Transients), VOUT = 3.3V @ 2A

Product Detail

Demonstration circuit 614 is a monolithic step-down DC/DC switching converter featuring the LT3434. The board is optimized for 3.3V output at up to 2A load current (the LTC3434 is a 3A capable device) for a steady state input voltage range of 4V to about 42V with input transients up to 60V. Minimum on-time restrictions and the 3.3V output may limit the steady state maximum input voltage to 42V before pulse skipping occurs.

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.

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