LTC3713 - Low Input Voltage, High Power, No Rsense Synchronous Buck DC/DC Controller
Features
- Very Low VIN(min): 1.5V
- True Current Mode Control
- 5V Drive for N-Channel MOSFETs Eliminates Auxillary 5V Supply
- No Sense Resistor Required
- Uses Standard 5V Logic-Level N-Channel MOSFETs
- Adjustable Current Limit
- Adjustable Frequency
- Switch tON(MIN) < 100ns
- 2% to 90% Duty Cycle at 200kHz
- 0.8V ±1% Reference
- Power Good Output Voltage Monitor
- Programmable Soft-Start
- Output Overvoltage Protection
- Optional Short-Circuit Shutdown Timer
- Small 24-Lead SSOP Package
Typical Application
Description
The LTC3713 is a high current, high efficiency synchronous buck switching regulator controller optimized for use with very low input supply voltages. It operates from inputs as low as 1.5V and provides a regulated output voltage from 0.8V up to (0.9)VIN. The controller uses a valley current control architecture to enable high operating frequencies without requiring a sense resistor.Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT. The LTC3713 uses a pair of standard 5V logic-level N-channel external MOSFETs, eliminating the need for expensive P-channel or low threshold devices.
Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference, and can assist secondary winding regulation by disabling discontinuous operation when the main output is lightly loaded. Fault protection is provided by internal foldback current limiting,an output overvoltage comparator and an optional short-circuit shutdown timer.
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 |
|---|---|---|---|---|---|
| LTC3713EG#PBF | SSOP-24 | G | E | 05-08-1640 (G24) | Yes |
| LTC3713EG#TRPBF | SSOP-24 | G | E | 05-08-1640 (G24) | 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 | |
|---|---|---|---|---|---|---|
| LTC3713EG#PBF | SSOP-24 | E | $4.85 | $4.10 | Yes | |
| LTC3713EG#TRPBF | SSOP-24 | E | $4.20 | 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 |
|---|---|---|---|
| DC412A | LTC3713EG | Low Input Voltage, High Power, No Rsense Synchronous Buck Converter, 1.7V to 6V Input, 1.25Vout @ 10A | $150.00 | |
| Buy Now | |||
Applications
- Telecom Card 3.3V, 2.5V, 1.8V Step-Down
- Bus Termination (DDR memory, SSTL)
- Synchronous Buck with General Purpose Boost
- Low VIN Synchronous Boost
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC3713
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.
