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LTC3834: 30μA IQ Synchronous Step-Down Controller Data Sheet2/10/2015PDF774K
Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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R384 Reliability Data3/26/2018PDF18 K
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DC1344A - Demo Manual9/24/2009PDF1M
Tools & Simulations
LTspice
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.
Models for the following parts are available in LTspice:
LTC3834
LTC3834-1
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3834EFE#PBF | Material Declaration | Reliability Data | 20-Lead TSSOP w/ EP | |
| LTC3834EFE#TRPBF | Material Declaration | Reliability Data | 20-Lead TSSOP w/ EP | |
| LTC3834EUFD#PBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | |
| LTC3834EUFD#TRPBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | |
| LTC3834IFE#PBF | Material Declaration | Reliability Data | 20-Lead TSSOP w/ EP | |
| LTC3834IFE#TRPBF | Material Declaration | Reliability Data | 20-Lead TSSOP w/ EP | |
| LTC3834IUFD#PBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | |
| LTC3834IUFD#TRPBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | |
| Wafer Fabrication Data | R384 Reliability Data |
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Lead Times
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.