LTC3863 - 60V Low IQ Inverting DC/DC Controller
Features
- Wide Operating VIN Range: 3.5V to 60V
- Wide Negative VOUT Range: –0.4V to Beyond –150V
- Low Operating IQ = 70μA
- Strong High Voltage MOSFET Gate Driver
- Constant Frequency Current Mode Architecture
- Verified FMEA for Adjacent Pin Open/Short
- Selectable High Efficiency Burst Mode® Operation or Pulse-Skipping Mode at Light Loads
- Programmable Fixed Frequency: 50kHz to 850kHz
- Phase-Lockable Frequency: 75kHz to 750kHz
- Accurate Current Limit
- Programmable Soft-Start or Voltage Tracking
- Internal Soft-Start Guarantees Smooth Start-Up
- Low Shutdown IQ = 7μA
- Available in Small 12-Lead Thermally Enhanced MSOP and DFN Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC®3863 is a robust, inverting DC/DC PMOS controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET to generate a negative output and requires just a single inductor to complete the circuit. Output voltages from –0.4V to –150V are typically achievable with higher voltages possible, only limited by external components.
The LTC3863 offers excellent light load efficiency, drawing only 70μA quiescent current in a user programmable Burst Mode operation. Its peak current mode, constant frequency PWM architecture provides for good control of switching frequency and output current limit. The switching frequency can be programmed from 50kHz to 850kHz with an external resistor and can be synchronized to an external clock from 75kHz to 750kHz.
The LTC3863 offers programmable soft-start or output tracking. Safety features include overvoltage, overcurrent and short-circuit protection including frequency foldback.
The LTC3863 is available in thermally enhanced 12-lead MSOP and 3mm × 4mm DFN packages.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC3863EDE#PBF | 4x3 DFN-12 | DE/UE | E | 05-08-1695 | Yes |
| LTC3863EDE#TRPBF | 4x3 DFN-12 | DE/UE | E | 05-08-1695 | Yes |
| LTC3863EMSE#PBF | MS-12E | MSE | E | 05-08-1666 | Yes |
| LTC3863EMSE#TRPBF | MS-12E | MSE | E | 05-08-1666 | Yes |
| LTC3863HDE#PBF | 4x3 DFN-12 | DE/UE | H | 05-08-1695 | Yes |
| LTC3863HDE#TRPBF | 4x3 DFN-12 | DE/UE | H | 05-08-1695 | Yes |
| LTC3863HMSE#PBF | MS-12E | MSE | H | 05-08-1666 | Yes |
| LTC3863HMSE#TRPBF | MS-12E | MSE | H | 05-08-1666 | Yes |
| LTC3863IDE#PBF | 4x3 DFN-12 | DE/UE | I | 05-08-1695 | Yes |
| LTC3863IDE#TRPBF | 4x3 DFN-12 | DE/UE | I | 05-08-1695 | Yes |
| LTC3863IMSE#PBF | MS-12E | MSE | I | 05-08-1666 | Yes |
| LTC3863IMSE#TRPBF | MS-12E | MSE | I | 05-08-1666 | Yes |
| LTC3863MPDE#PBF | 4x3 DFN-12 | DE/UE | MP | 05-08-1695 | Yes |
| LTC3863MPDE#TRPBF | 4x3 DFN-12 | DE/UE | MP | 05-08-1695 | Yes |
| LTC3863MPMSE#PBF | MS-12E | MSE | MP | 05-08-1666 | Yes |
| LTC3863MPMSE#TRPBF | MS-12E | MSE | MP | 05-08-1666 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- 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 | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3863EDE#PBF | 4x3 DFN-12 | E | $2.94 | $2.06 | Yes | |
| LTC3863EDE#TRPBF | 4x3 DFN-12 | E | $2.12 | Yes | ||
| LTC3863EMSE#PBF | MS-12E | E | $2.94 | $2.06 | Yes | |
| LTC3863EMSE#TRPBF | MS-12E | E | $2.12 | Yes | ||
| LTC3863HDE#PBF | 4x3 DFN-12 | H | $3.90 | $2.73 | Yes | |
| LTC3863HDE#TRPBF | 4x3 DFN-12 | H | $2.79 | Yes | ||
| LTC3863HMSE#PBF | MS-12E | H | $3.90 | $2.73 | Yes | |
| LTC3863HMSE#TRPBF | MS-12E | H | $2.79 | Yes | ||
| LTC3863IDE#PBF | 4x3 DFN-12 | I | $3.49 | $2.44 | Yes | |
| LTC3863IDE#TRPBF | 4x3 DFN-12 | I | $2.50 | Yes | ||
| LTC3863IMSE#PBF | MS-12E | I | $3.49 | $2.44 | Yes | |
| LTC3863IMSE#TRPBF | MS-12E | I | $2.50 | Yes | ||
| LTC3863MPDE#PBF | 4x3 DFN-12 | MP | $9.40 | $6.58 | Yes | |
| LTC3863MPDE#TRPBF | 4x3 DFN-12 | MP | $6.64 | Yes | ||
| LTC3863MPMSE#PBF | MS-12E | MP | $9.40 | $6.58 | Yes | |
| LTC3863MPMSE#TRPBF | MS-12E | MP | $6.64 | Yes | ||
| 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 |
|---|---|---|---|
| DC1737A | LTC3863EMSE Demo Board | 4.5V-16V; Vout = -5.2V @ 1.7A or -12V @ 1A | $125.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3863HMSE#PBF | MS-12E | H | $3.90 | $2.73 | Yes | |
| LTC3863HMSE#TRPBF | MS-12E | H | $2.79 | Yes | ||
| LTC3863IMSE#PBF | MS-12E | I | $3.49 | $2.44 | Yes | |
| LTC3863IMSE#TRPBF | MS-12E | I | $2.50 | Yes | ||
| LTC3863MPMSE#PBF | MS-12E | MP | $9.40 | $6.58 | Yes | |
| LTC3863MPMSE#TRPBF | MS-12E | MP | $6.64 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Industrial and Automotive Power Supplies
- Telecom Power Supplies
- Distributed Power Systems
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Design Tools
LTspice
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LTC3863
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.
