LTC3835-1 - Low IQ Synchronous Step-Down Controller


  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
  • Low Operating IQ: 80µA
  • OPTI-LOOP Compensation Minimizes COUT
  • ±1% Output Voltage Accuracy
  • Wide VIN 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 IQ: 10µA
  • Selectable Continuous, Pulse-Skipping or Burst Mode Operation at Light Loads
  • Small 16-Lead Narrow SSOP or 3mm × 5mm DFN Package

Typical Application

LTC3835-1 Typical Application
LTC3835-1 Typical Application


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.

LTC3835 Yes  Yes  Yes  TSSOP-20, 4x5 QFN-20
LTC3835-1 No  No  No  GN-16, 3x5 DFN-16


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3835EDHC-1#PBF 5x3 DFN-16 DHC E 05-08-1706 Yes
LTC3835EDHC-1#TRPBF 5x3 DFN-16 DHC E 05-08-1706 Yes
LTC3835EGN-1#PBF SSOP-16 GN E 05-08-1641 (GN16) Yes
LTC3835EGN-1#TRPBF SSOP-16 GN E 05-08-1641 (GN16) Yes
LTC3835IDHC-1#PBF 5x3 DFN-16 DHC I 05-08-1706 Yes
LTC3835IDHC-1#TRPBF 5x3 DFN-16 DHC I 05-08-1706 Yes
LTC3835IGN-1#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC3835IGN-1#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes

LTC3835-1 Package Drawing
LTC3835-1 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3835EDHC-1#PBF 5x3 DFN-16 E $4.86 $3.40 Yes
LTC3835EDHC-1#TRPBF 5x3 DFN-16 E $3.46 Yes
LTC3835EGN-1#PBF SSOP-16 E $4.86 $3.40 Yes
LTC3835EGN-1#TRPBF SSOP-16 E $3.46 Yes
LTC3835IDHC-1#PBF 5x3 DFN-16 I $6.00 $4.20 Yes
LTC3835IDHC-1#TRPBF 5x3 DFN-16 I $4.26 Yes
LTC3835IGN-1#PBF SSOP-16 I $6.00 $4.20 Yes
LTC3835IGN-1#TRPBF SSOP-16 I $4.26 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC965A LTC3835EGN-1 Demo Board | 4.5V ≤ VIN ≤ 36V, Vout = 3.3V @ 5A $125.00
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Click here to view our complete list of demo boards


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

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Design Tools


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