LTC3834
PRODUCTION30μA IQ Synchronous Step-Down Controller
- Part Models
- 8
- 1ku List Price
- Starting From $5.34
Overview
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
- Low Operating Quiescent Current: 30μA
- OPTI-LOOP® Compensation Minimizes COUT
- ±1% Output Voltage Accuracy
- Wide VIN Range: 4V to 36V
- 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: 4μA
- 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
The LTC3834 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 30μA 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 LTC3834 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 start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. A reduced feature set version of the part (LTC3834-1) is available in a smaller, lower pin count package.
| PHASMD | EXTVCC | PGOOD | PACKAGES | |
| LTC3834 | Yes | Yes | Yes | FE20/4mm × 5mm QFN |
| LTC3834-1 | No | No | No | GN16/3mm × 5mm DFN |
Applications
- Automotive Systems
- Telecom Systems
- Battery-Operated Digital Devices
- Distributed DC Power Systems
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LTC3834EFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3834EFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3834EUFD#PBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3834EUFD#TRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3834IFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3834IFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3834IUFD#PBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3834IUFD#TRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3834EFE#PBF | PRODUCTION | |
| LTC3834EFE#TRPBF | PRODUCTION | |
| LTC3834IFE#PBF | PRODUCTION | |
| LTC3834IFE#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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| Circuit Monitors 1 | ||
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| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3834
- LTC3834-1
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
LTC3834EFE Demo Board | 30µA IQ, VIN: 4.5V-32V, VOUT: 3.3V/5A
Resources
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