LTC3834: 30μA IQ Synchronous Step-Down Controller Data Sheet2/10/2015774K
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
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.
|LTC3834||Yes||Yes||Yes||FE20/4mm × 5mm QFN|
|LTC3834-1||No||No||No||GN16/3mm × 5mm DFN|
- Automotive Systems
- Telecom Systems
- Battery-Operated Digital Devices
- Distributed DC Power Systems
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)
Demonstration circuit 1344A is a low quiescent current step-down DC/DC converter featuring the LTC3834 in a 20-pin TSSOP exposed pad package. The DC1344A is programmed to generate a regulated 3.3V@5A output from a 4.5V to 32V input voltage.
Documentation & Resources
R384 Reliability Data3/26/201818 K
DC1344A - Demo Manual9/24/20091M
Tools & Simulations
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|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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