LT3692

PRODUCTION

Monolithic Dual Tracking 3.5A Step-Down Switching Regulator

Part Models: 4
1ku List Price: Starting From $5.07

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Part Details

Wide Input Range:
- Operation from 3V to 36V
- OVLO Protects Circuit Through 60V Transients
Independent Supply, Shutdown, Soft-Start, Programmable Current Limit and Programmable Power Good for Each 3.5A Regulator
Die Temperature Monitor
Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.25MHz with Synchronized Clock Output
Independent Synchronized Switching Frequencies Optimize Component Size
Antiphase Switching
Outputs Can Be Paralleled
Flexible Output Voltage Tracking
Enhanced Short-Circuit Protection
Low Dropout: 95% Maximum Duty Cycle
5mm × 5mm QFN Package

The LT3692 is a dual current mode PWM step-down DC/DC converter with two internal 3.8A switches. Independent input voltage, shutdown, feedback, soft-start, current limit and comparator pins for each channel simplify complex power supply tracking and sequencing requirements.

To optimize efficiency and component size, both converters have a programmable maximum current limit and are synchronized to either a common external clock input, or a resistor settable fixed 250kHz to 2.25MHz internal oscillator. A frequency divider is provided for channel 1 to further optimize component size. At all frequencies, a 180° phase relationship between channels is maintained, reducing voltage ripple and component size. A clock output is available for synchronizing multiple regulators.

Minimum input to output voltage ratios are improved by allowing the switch to stay on through multiple clock cycles only switching off when the boost capacitor needs recharging. Independent channel operation can be programmed using the SHDN pin. Disabling both converters reduces the total quiescent to <10μA.


	Min On-Time	Features	Package
LT3692	180ns	-	5x5 QFN-32
LT3692A	140ns	Programmable Shutdown UVLO	TSSOP-38E, 5x5 QFN-32

Applications

Automotive Supplies
Distributed Supply Regulation

Part Models: 4
1ku List Price: Starting From $5.07

Documentation

Data Sheet 1

LT3692: Monolithic Dual Tracking 3.5A Step-Down Switching Regulator Data Sheet 03/14/2013

Reliability Data 1

R530 Reliability Data 03/26/2018

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
LT3692EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3692EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3692IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3692IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

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
High Voltage Hot Swap Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode
Silicon Oscillators 1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation

Parts	Product Life Cycle	Description
LT3692A	PRODUCTION	Monolithic Dual Tracking 3.5A Step-Down Switching Regulator

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3692
LT3692A

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.

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