LTC3730 - 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller
Features
- 3-Phase Current Mode Controller with Onboard MOSFET Drivers
- ±5% Output Current Match Optimizes Thermal Performance and Size of Inductors and MOSFETs
- Operational Amplifier Accomodates Mode Switching
- ±1% VREF Accuracy Over Temperature
- Reduced Input and Output Capacitance
- Reduced Power Supply Induced Noise
- VOUT Programmable from 0.6V to 1.75V (IMVP III)
- ±10% Power Good Output Indicator
- 250kHz to 600kHz Per Phase, PLL, Fixed Frequency
- PWM, Stage Shedding™ or Burst Mode® Operation
- OPTI-LOOP® Compensation Minimizes COUT
- Adjustable Soft-Start Current Ramping
- 4V, VIN,Undervoltage RUN/SS Reset/Reattempt Circuit
- Short-Circuit Shutdown Timer with Defeat Option
- Overvoltage Soft Latch
- Small 36-Lead Narrow (0.209”) SSOP Package
Typical Application
Description
The LTC3730 is a PolyPhase synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 600kHz per phase to minimize the RMS losses in both the input and output filter capacitors. The 3-phase technique effectively triples the fundamental frequency, improving transient response while operating each controller at an optimal frequency for efficiency and ease of thermal design. Light load efficiency is optimized by using a choice of output Stage Shedding or Burst Mode technology.
An internal operational amplifier provides mode selectable output voltage programming in conjunction with the internal VID voltage control DAC.
Soft-start and a defeatable, timed short-circuit shutdown protect the MOSFETs and the load. Current foldback provides protection for the external MOSFETs under short-circuit or overload conditions.
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 |
|---|---|---|---|---|---|
| LTC3730CG#PBF | SSOP-24 | G | C | 05-08-1640 (G24) | Yes |
| LTC3730CG#TRPBF | SSOP-24 | G | C | 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 | |
|---|---|---|---|---|---|---|
| LTC3730CG#PBF | SSOP-24 | C | $6.25 | $4.35 | Yes | |
| LTC3730CG#TRPBF | SSOP-24 | C | $4.45 | 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.Click here to view our complete list of demo boards
Applications
- Tablet Computers
- High Performance Notebook Computers
- High Output Current DC/DC Power Supplies
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
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.
