LT3693
PRODUCTION36V, 3.5A, 2.4MHz Step-Down Switching Regulator
- Part Models
- 8
- 1ku List Price
- Starting From $5.81
Overview
- Wide Input Range: 3.6V to 36V
- 3.5A Maximum Output Current
- Adjustable Switching Frequency: 200kHz to 2.4MHz
- Low Shutdown Current: IQ < 1µA
- Integrated Boost Diode
- Synchronizable Between 250kHz to 2MHz
- Power Good Flag
- Saturating Switch Design: 95mΩ On-Resistance
- 0.790V Feedback Reference Voltage
- Output Voltage: 0.79V to 30V
- Thermal Protection
- Soft-Start Capability
- Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages
The LT3693 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 95mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. The LT3693 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.
Applications
- Automotive Battery Regulation
- Power for Portable Products
- Distributed Supply Regulation
- Industrial Supplies
- Wall Transformer Regulation
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
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 |
|---|---|---|---|
| LT3693EDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LT3693EDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LT3693EMSE#PBF | 10-Lead MSOP w/ EP | ||
| LT3693EMSE#TRPBF | 10-Lead MSOP w/ EP | ||
| LT3693IDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LT3693IDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LT3693IMSE#PBF | 10-Lead MSOP w/ EP | ||
| LT3693IMSE#TRPBF | 10-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LT3693EDD#PBF | PRODUCTION | |
| LT3693EDD#TRPBF | PRODUCTION | |
| LT3693EMSE#PBF | PRODUCTION | |
| LT3693EMSE#TRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LT3693EMSE#PBF | PRODUCTION | |
| LT3693EMSE#TRPBF | PRODUCTION | |
| LT3693IMSE#PBF | PRODUCTION | |
| LT3693IMSE#TRPBF | PRODUCTION | |
|
Apr 2, 2021 - 21_0064 Test Platform Conversion for LT3693 MSOP |
||
| LT3693EMSE#PBF | PRODUCTION | |
| LT3693EMSE#TRPBF | PRODUCTION | |
| LT3693IMSE#PBF | PRODUCTION | |
| LT3693IMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT3693EMSE#PBF | PRODUCTION | |
| LT3693EMSE#TRPBF | PRODUCTION | |
| LT3693IMSE#PBF | PRODUCTION | |
| LT3693IMSE#TRPBF | PRODUCTION | |
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LT3693IDD#PBF | PRODUCTION | |
| LT3693IDD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
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| Power System Management (PSM) & Sequencers 1 | ||
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3693
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
LT3693EMSE Demo Board | 6.3V ≤ VIN ≤ 36V, VOUT = 5V @ 3.5A