LT3692
PRODUCTIONMonolithic Dual Tracking 3.5A Step-Down Switching Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $6.42
Overview
- 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
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 |
|---|---|---|---|
| LT3692EUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT3692EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT3692IUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT3692IUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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| Parts | Product Life Cycle | Description |
|---|---|---|
| LT3692A | PRODUCTION | Monolithic Dual Tracking 3.5A Step-Down Switching Regulator |
Tools & Simulations
LTspice 1
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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