LTC3833
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3833

Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.02
Features
  • Wide VIN Range: 4.5V to 38V
  • VOUT Range: 0.6V to 5.5V
  • Output Accuracy: ±0.25% at 25°C and ±0.67% over Temperature
  • Differential Output Sensing Allowing Up to 500mV Line Loss
  • Fast Load Transient Response
  • tON(MIN) = 20ns, tOFF(MIN) = 90ns
  • Controlled On-Time Valley Current Mode Architecture
  • Frequency Programmable from 200kHz to 2MHz and Synchronizable to External Clock
  • RSENSE or Inductor DCR Current Sensing
  • Overvoltage Protection and Current Limit Foldback
  • Power Good Output Voltage Monitor
  • Output Tracking or Adjustable Soft-Start
  • External VCC Input for Bypassing Internal LDO
  • 20-Pin QFN (3mm × 4mm) and TSSOP Packages
Additional Details
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The LTC3833 is a synchronous step-down DC/DC switching regulator controller targeted for high power applications. It drives all N-channel power MOSFETs. The controlled on-time valley current mode architecture allows for both fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUT and load current.

Differential output voltage sensing along with a precision internal reference combine to offer ±0.67% output regulation and the ability to correct for up to ±500mV variations in the output terminals due to line losses. The operating frequency can be programmed from 200kHz to 2MHz with an external resistor and can be synchronized to an external clock for noise and EMI sensitive applications.

Very low tON and tOFF times allow for near 0% and near 100% duty cycles, respectively. Programmable soft-start or output voltage tracking is available. Safety features include output overvoltage protection, programmable current limit with foldback, and a power good output signal.

Applications

  • Distributed Power Systems
  • Point-of-Load Converters
  • Computing Systems
  • Datacomm Systems
Part Models 8
1ku List Price Starting From $3.02

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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LTC3833EUDC#PBF
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LTC3833EUDC#TRPBF
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LTC3833IFE#PBF
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LTC3833IFE#TRPBF
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LTC3833IUDC#PBF
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LTC3833IUDC#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

LTC3833EFE#PBF

PRODUCTION

LTC3833EFE#TRPBF

PRODUCTION

LTC3833IFE#PBF

PRODUCTION

LTC3833IFE#TRPBF

PRODUCTION

Jul 31, 2020

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3833EFE#PBF

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LTC3833EFE#TRPBF

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LTC3833EUDC#PBF

PRODUCTION

LTC3833EUDC#TRPBF

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LTC3833IFE#PBF

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LTC3833IUDC#PBF

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LTC3833IUDC#TRPBF

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Filter by Model

reset

Reset Filters

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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

LTC3833EFE#PBF

PRODUCTION

LTC3833EFE#TRPBF

PRODUCTION

LTC3833IFE#PBF

PRODUCTION

LTC3833IFE#TRPBF

PRODUCTION

Jul 31, 2020

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3833EFE#PBF

PRODUCTION

LTC3833EFE#TRPBF

PRODUCTION

LTC3833EUDC#PBF

PRODUCTION

LTC3833EUDC#TRPBF

PRODUCTION

LTC3833IFE#PBF

PRODUCTION

LTC3833IFE#TRPBF

PRODUCTION

LTC3833IUDC#PBF

PRODUCTION

LTC3833IUDC#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 4

reference details image

DC1640A-A

LTC3833EUDC Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 20A, Inductor DCR Sensing

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DC1640A-A

LTC3833EUDC Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 20A, Inductor DCR Sensing

LTC3833EUDC Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 20A, Inductor DCR Sensing

Product Detail

Demonstration circuit 1640A is a 1.5V/20A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 14V. The demo board comes in two versions. The A version uses inductor DCR current sensing with an iron powder inductor for high efficiency. The B version uses a 2mΩ /1% sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode topology of the LTC3833 allows for a fast load step response.

reference details image

DC1640A-B

LTC3833EUDC Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 20A, RSENSE

zoom

DC1640A-B

LTC3833EUDC Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 20A, RSENSE

LTC3833EUDC Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 20A, RSENSE

Product Detail

Demonstration circuit 1640A is a 1.5V/20A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 14V. The demo board comes in two versions. The A version uses inductor DCR current sensing with an iron powder inductor for high efficiency. The B version uses a 2mΩ /1% sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode topology of the LTC3833 allows for a fast load step response.

reference details image

DC1516A-A

LTC3833EFE Demo Board | VIN = 4.5V to 24V, VOUT1 = 1.5V @ 15A, Inductor DCR Sensing, 89.4% Efficiency

zoom

DC1516A-A

LTC3833EFE Demo Board | VIN = 4.5V to 24V, VOUT1 = 1.5V @ 15A, Inductor DCR Sensing, 89.4% Efficiency

LTC3833EFE Demo Board | VIN = 4.5V to 24V, VOUT1 = 1.5V @ 15A, Inductor DCR Sensing, 89.4% Efficiency

Product Detail

Demonstration circuit 1516A is a 1.5V/15A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 24V. The demo board comes in two versions. The -A version uses inductor DCR current sensing with an iron powder inductor for highest efficiency. The -B version uses a 2.5mΩ/1% sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode control of the LTC3833 allows for a fast load step response.

reference details image

DC1516A-B

LTC3833EFE Demo Board | VIN = 4.5V to 24V, VOUT1 = 1.5V @ 15A, RSENSE

zoom

DC1516A-B

LTC3833EFE Demo Board | VIN = 4.5V to 24V, VOUT1 = 1.5V @ 15A, RSENSE

LTC3833EFE Demo Board | VIN = 4.5V to 24V, VOUT1 = 1.5V @ 15A, RSENSE

Product Detail

Demonstration circuit 1516A is a 1.5V/15A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 24V. The demo board comes in two versions. The -A version uses inductor DCR current sensing with an iron powder inductor for highest efficiency. The -B version uses a 2.5mΩ/1% sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode control of the LTC3833 allows for a fast load step response.

Tools & Simulations

Tools & Simulations 2

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.

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