LTC3835
PRODUCTIONLow IQ Synchronous Step-Down Controller
- Part Models
- 12
- 1ku List Price
- Starting From $5.38
Overview
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
- Low Operating Quiescent Current: 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
- Power Good Output Voltage Monitor
- Clock Output for PolyPhase® Applications
- Output Overvoltage Protection
- Low Shutdown IQ: 10μA
- Internal LDO Powers Gate Drive from VIN or VOUT
- Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads
- Small 20-Lead TSSOP or 4mm × 5mm QFN Package
- AEC-Q100 Qualified for Automotive Applications
The LTC3835 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 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.
| PART # | CLKOUT/PHASMD | EXTVCC | PGOOD | PACKAGES |
| LTC3835 | Yes | Yes | Yes | FE20/4 × 5 QFN |
| LTC3835-1 | No | No | No | GN16/3 × 5 DFN |
Applications
- Automotive Systems
- Telecom Systems
- Battery-Operated Digital Devices
- Distributed DC Power Systems
All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 5408150, 5481178, 5705919, 5929620, 6304066, 6498466, 6580258, 6611131.
Documentation
Data Sheet 1
User Guide 1
Design Note 1
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 |
|---|---|---|---|
| LTC3835EFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3835EFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3835EUFD#PBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835EUFD#TRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835EUFD#WPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835EUFD#WTRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835IFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3835IFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3835IUFD#PBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835IUFD#TRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835IUFD#WPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3835IUFD#WTRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LTC3835EFE#PBF | PRODUCTION | |
| LTC3835EFE#TRPBF | PRODUCTION | |
| LTC3835IFE#PBF | PRODUCTION | |
| LTC3835IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3835EFE#PBF | PRODUCTION | |
| LTC3835EFE#TRPBF | PRODUCTION | |
| LTC3835IFE#PBF | PRODUCTION | |
| LTC3835IFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice 1
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
LTC3835EFE Demo Board | 4.5V ≤ VIN ≤ 36V, VOUT = 3.3V @ 5A