LTC3775
PRODUCTIONHigh Frequency Synchronous Step-Down Voltage Mode DC/DC Controller
- Part Models
- 8
- 1ku List Price
- Starting From $2.77
Overview
- Wide VIN Range: 4.5V to 38V
- Line Feedforward Compensation
- Low Minimum On-Time: tON(MIN) < 30ns
- Powerful On-board MOSFET Drivers
- Leading Edge Modulation Voltage Mode Control
- ±0.75%, 0.6V Reference Voltage Accuracy Over Temperature
- VOUT Range: 0.6V to 0.8VIN
- Programmable, Cycle-by-Cycle Peak Current Limit
- Sense Resistor or RDS(ON) Current Sensing
- Programmable Soft-Start
- Synchronizable Fixed Frequency from 250kHz to 1MHz
- Selectable Pulse-Skipping or Forced Continuous Modes of Operation
- Low Shutdown Current: 14μA Typical
- Thermally Enhanced 16-Lead MSOP and 3mm × 3mm QFN Packages
The LTC3775 is a high efficiency synchronous step-down switching DC/DC controller that drives an all N-channel power MOSFET stage from a 4.5V to 38V input supply voltage. A patented line feedforward compensation circuit and a high bandwidth error amplifier provide very fast line and load transient response.
High step-down ratios are made possible by a low 30ns minimum on-time, allowing extremely low duty cycles. MOSFET RDS(ON) current sensing maximizes efficiency. Alternatively, a sense resistor can be used for higher current limit accuracy. Continuous monitoring of the voltages across the top and bottom MOSFETs allows cycle-by-cycle control of the inductor current, configurable by external resistors.
The soft-start function controls the duty cycle during start-up, providing a smooth output voltage ramp up. The operating frequency is user programmable from 250kHz to 1MHz and can be synchronized to an external clock.
Applications
- Automotive Systems
- Telecom and Industrial Power Supplies
- Point of Load Applications
Documentation
Data Sheet 1
User Guide 1
Application Note 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 |
|---|---|---|---|
| LTC3775EMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3775EMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3775EUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3775EUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3775IMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3775IMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3775IUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3775IUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC3775EMSE#PBF | PRODUCTION | |
| LTC3775EMSE#TRPBF | PRODUCTION | |
| LTC3775EUD#PBF | PRODUCTION | |
| LTC3775EUD#TRPBF | PRODUCTION | |
| LTC3775IMSE#PBF | PRODUCTION | |
| LTC3775IMSE#TRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC3775EMSE#PBF | PRODUCTION | |
| LTC3775EMSE#TRPBF | PRODUCTION | |
| LTC3775IMSE#PBF | PRODUCTION | |
| LTC3775IMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC3775EMSE#PBF | PRODUCTION | |
| LTC3775EMSE#TRPBF | PRODUCTION | |
| LTC3775IMSE#PBF | PRODUCTION | |
| LTC3775IMSE#TRPBF | PRODUCTION | |
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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| Switching Regulators & Controllers 1 | ||
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3775
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.
