LTC3834-1

PRODUCTION

30μA IQ Synchronous Step-Down Controller

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Overview

  • Wide Output Voltage Range: 0.8V VOUT 10V
  • Low Operating IQ: 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
  • Output Overvoltage Protection
  • Low Shutdown IQ: 4μA
  • Selectable Continuous, Pulse-Skipping or
  • Burst Mode® Operation at Light Loads
  • Small 16-Lead Narrow SSOP or 5mm × 3mm DFN Package

The LTC3834-1 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 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 LTC3834-1 features a precision 0.8V reference . 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. An enhanced feature set part (LTC3834) is available.

  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
LTC3834-1
30μA IQ Synchronous Step-Down Controller
High Efficiency Step-Down Converter Efficiency and Power Loss vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Oscillators 1
LTC6909
PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Protection Switches & Controllers 2
LTC4364
RECOMMENDED FOR NEW DESIGNS Surge Stopper with Ideal Diode
LTC2955
RECOMMENDED FOR NEW DESIGNS Pushbutton On/Off Controller with Automatic Turn-On
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3834
  • LTC3834-1
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.

Evaluation Kits

eval board
schematic 1
DC1346A

LTC3834EGN-1 Demo Board | 30uA Iq, VIN: 4.5V-32V, VOUT: 3.3V/5A

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Product Details

Demonstration circuit 1346A is a low quiescent current synchronous step-down DC/DC controller featuring the LTC3834-1 in a 16-pin narrow SSOP package. The DC1346A is generates a regulated 3.3V@5A output from a 4.5V to 32V input voltage.


 
DC1346A
LTC3834EGN-1 Demo Board | 30uA Iq, VIN: 4.5V-32V, VOUT: 3.3V/5A
DC1346A - Schematic

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