LTC3833

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.02

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Part Details

Wide V_IN Range: 4.5V to 38V
V_OUT 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
t_ON(MIN) = 20ns, t_OFF(MIN) = 90ns
Controlled On-Time Valley Current Mode Architecture
Frequency Programmable from 200kHz to 2MHz and Synchronizable to External Clock
R_SENSE or Inductor DCR Current Sensing
Overvoltage Protection and Current Limit Foldback
Power Good Output Voltage Monitor
Output Tracking or Adjustable Soft-Start
External V_CC Input for Bypassing Internal LDO
20-Pin QFN (3mm × 4mm) and TSSOP Packages

Part Models: 8
1ku List Price: Starting From $3.02

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3833EFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833EFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833EUDC#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833EUDC#TRPBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833IFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833IFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833IUDC#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3833IUDC#TRPBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
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)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC3833EFE#PBF	PRODUCTION
LTC3833EFE#TRPBF	PRODUCTION
LTC3833EUDC#PBF	PRODUCTION
LTC3833EUDC#TRPBF	PRODUCTION
LTC3833IFE#PBF	PRODUCTION
LTC3833IFE#TRPBF	PRODUCTION
LTC3833IUDC#PBF	PRODUCTION
LTC3833IUDC#TRPBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
PowerPath, Ideal Diodes, and Load Switches 1
LTC4359	RECOMMENDED FOR NEW DESIGNS	Ideal Diode Controller with Reverse Input Protection
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTC3833

LTpowerCAD 4

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

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

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Product Details

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.

Resources

DC1640A - Schematic
86.00K

DC1640A - Design Files
1.00M

DC1640A - Demo Manual
767.00K

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

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Product Details

Resources

DC1640A - Schematic
86.00K

DC1640A - Design Files
1.00M

DC1640A - Demo Manual
767.00K

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

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Product Details

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.