LTC3834

PRODUCTION

30μA I_Q Synchronous Step-Down Controller

Part Models: 8
1ku List Price: Starting From $4.22

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Overview

Wide Output Voltage Range: 0.8V ≤ V_OUT ≤ 10V
Low Operating Quiescent Current: 30μA
OPTI-LOOP^® Compensation Minimizes C_OUT
±1% Output Voltage Accuracy
Wide V_IN 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 I_Q: 4μA
Internal LDO Powers Gate Drive from V_IN or V_OUT
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

Part Models: 8
1ku List Price: Starting From $4.22

Documentation

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	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834EFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834EUFD#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834EUFD#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834IFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834IFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834IUFD#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3834IUFD#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
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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Hardware Ecosystem

Parts	Product Life Cycle	Description
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Oscillators 1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Protection Switches & Controllers 2
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller
LTC2955	RECOMMENDED FOR NEW DESIGNS	Pushbutton On/Off Controller with Automatic Turn-On

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

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Product Details

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.

Resources

DC1344A - Demo Manual
9/24/2009

DC1344A - Design File
9/24/2009

DC1344A - Schematic
9/24/2009

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