Power Management
Switching Regulator
Step-Up (Boost) Regulators
Micropower Boost
Power Management
Switching Regulator
Step-Up (Boost) Regulators
External Power Switch Boost
LTC3786 - Low IQ Synchronous Boost Controller
Features
- Synchronous Operation For Highest Efficiency and Reduced Heat Dissipation
- Wide VIN Range: 4.5V to 38V (40V Abs Max) and Operates Down to 2.5V After Start-Up
- Output Voltages Up to 60V
- ±1% 1.2V Reference Voltage
- RSENSE or Inductor DCR Current Sensing
- 100% Duty Cycle Capability for Synchronous MOSFET
- Low Quiescent Current: 55μA
- Phase-Lockable Frequency (75kHz to 850kHz)
- Programmable Fixed Frequency (50kHz to 900kHz)
- Adjustable Output Voltage Soft-Start
- Power Good Output Voltage Monitor
- Low Shutdown Current IQ: <8μA
- Internal 5.4V LDO for Gate Drive Supply
- Thermally Enhanced 16-Pin 3mm × 3mm QFN and MSOP Packages
Typical Application
Description
The LTC®3786 is a high performance synchronous boost converter controller that drives all N-channel power MOSFETs. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, allowing the LTC3786 to be used in high power boost applications.
A 4.5V to 38V input supply range encompasses a wide range of system architectures and battery chemistries. When biased from the output of the boost converter or another auxiliary supply, the LTC3786 can operate from an input supply as low as 2.5V after start-up. The 55μA no-load quiescent current extends operating run time in battery-powered systems.
The operating frequency can be set for a 50kHz to 900kHz range or synchronized to an external clock using the internal PLL. The LTC3786 also features a precision 1.2V reference and a power good output indicator. The SS pin ramps the output voltage during start-up. The PLLIN/MODE pin selects among Burst Mode® operation, pulse-skipping mode or continuous inductor current mode at light loads.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
QFN-16, MSOP-16
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC3786EMSE#PBF | MSOP | 16 | E | $4.00 | $2.80 | View |
| LTC3786EMSE#TRPBF | MSOP | 16 | E | $2.86 | View | |
| LTC3786EUD#PBF | QFN | 16 | E | $4.00 | $2.80 | View |
| LTC3786EUD#TRPBF | QFN | 16 | E | $2.86 | View | |
| LTC3786IMSE#PBF | MSOP | 16 | I | $4.63 | $3.24 | View |
| LTC3786IMSE#TRPBF | MSOP | 16 | I | $3.30 | View | |
| LTC3786IUD#PBF | QFN | 16 | I | $4.63 | $3.24 | View |
| LTC3786IUD#TRPBF | QFN | 16 | I | $3.30 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1641A | LTC3786 MS16E Demo Board 5V VIN 24V; VOUT | $125.00 | |
| Buy Now | |||
Applications
- Industrial and Automotive Power Supplies
- Automotive Start-Stop Systems
- Medical Devices
- High Voltage Battery-Powered Systems
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Simulate
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Related models available in LTspice IV
LTC3786
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
