LTC3835-1

PRODUCTION

Low I_Q Synchronous Step-Down Controller

Part Models: 8
1ku List Price: Starting From $4.08

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Part Details

Wide Output Voltage Range: 0.8V ≤ V_OUT ≤ 10V
Low Operating I_Q: 80µA
OPTI-LOOP^® Compensation Minimizes C_OUT
±1% Output Voltage Accuracy
Wide V_IN Range: 4V to 36V Operation
Phase-Lockable Fixed Frequency 140kHz to 650kHz
Dual N-Channel MOSFET Synchronous Drive
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Output Current Foldback Limiting
Output Overvoltage Protection
Low Shutdown I_Q: 10µA
Selectable Continuous, Pulse-Skipping or Burst Mode^®Operation at Light Loads
Small 16-Lead Narrow SSOP or 3mm × 5mm DFN Package

The LTC3835-1 is a high performance step-down switching regulator controller that drives an all N-channel synchronous power MOSFET stage. A constant-frequency current mode architecture allows a phase-lockable frequency of up to 650kHz.

The 80µA no-load quiescent current extends operating life in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3835-1 features a precision 0.8V reference and a power good output indicator. The 4V to 36V input supply range encompasses a wide range of battery chemistries.

The TRACK/SS pin ramps the output voltage during startup. Current foldback limits MOSFET heat dissipation during short-circuit conditions.


	CLKOUT/PHASMD	EXTVCC	PGOOD	Package
LTC3835	Yes	Yes	Yes	TSSOP-20, 4x5 QFN-20
LTC3835-1	No	No	No	GN-16, 3x5 DFN-16

Applications

Automotive Systems
Telecom Systems
Battery-Operated Digital Devices
Distributed DC Power Systems

Part Models: 8
1ku List Price: Starting From $4.08

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
LTC3835EDHC-1#PBF	16-Lead DFN (5mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835EDHC-1#TRPBF	16-Lead DFN (5mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835EGN-1#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835EGN-1#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835IDHC-1#PBF	16-Lead DFN (5mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835IDHC-1#TRPBF	16-Lead DFN (5mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835IGN-1#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3835IGN-1#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC3835EGN-1#PBF	PRODUCTION
LTC3835EGN-1#TRPBF	PRODUCTION
LTC3835IGN-1#PBF	PRODUCTION
LTC3835IGN-1#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3835EGN-1#PBF	PRODUCTION
LTC3835EGN-1#TRPBF	PRODUCTION
LTC3835IGN-1#PBF	PRODUCTION
LTC3835IGN-1#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC3835EGN-1#PBF	PRODUCTION
LTC3835EGN-1#TRPBF	PRODUCTION
LTC3835IGN-1#PBF	PRODUCTION
LTC3835IGN-1#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3835
LTC3835-1

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.

Evaluation Kits

LTC3835EGN-1 Demo Board | 4.5V ≤ VIN ≤ 36V, VOUT = 3.3V @ 5A

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Product Details

Demonstration circuit 965A is a single output high frequency step-down DC/DC converter featuring the low quiescent current LTC3835-1 in a 16-pin narrow SSOP package. The DC965A is programmed to generate a regulated 3.3V@5A output from a 4.5V to 36V input voltage. The LTC3835-1 is similar to the LTC3835 but has reduced functionality (it does not have PGOOD, ExtVCC or CLOCKOUT pins).

Resources

DC965A - Demo Manual
411.00K

DC965A - Design File
694.00K

DC965A - Schematic
29.00K

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