LTC1629-6 - PolyPhase, Synchronous Step-Down Switching Regulator
Features
- Reduces Required Input Capacitance and Power Supply Induced Noise
- True Remote Sensing Differential Amplifier
- 0.6V, ±1% Voltage Reference Accuracy
- PolyPhase Controller Operates from Two to Twelve Phases
- Current Mode Control Ensures Current Sharing
- Phase-Lockable Fixed Frequency: 150kHz to 300kHz
- 1.8MHz Effective Switching Frequency Capability
- OPTI-LOOP® Compensation Reduces COUT
- Power Good Output Voltage Monitor
- Wide VIN Range: 4V to 36V Operation
- Very Low Dropout Operation: 99% Duty Cycle
- Adjustable Soft-Start Current Ramping
- Internal Current Foldback Plus Shutdown Timer
- Overvoltage Soft-Latch Eliminates Nuisance Trips
- Micropower Shutdown
- Available in 28-Lead SSOP Package
Typical Application
Description
The LTC1629-6 is a PolyPhase™ synchronous stepdown current mode switching regulator controller with 0.6V reference that drives N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The PolyPhase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The output clock signal allows expansion for up to 12 evenly phased controllers for systems requiring 15A to 200A of output current. The multiple phase technique effectively multiplies the fundamental frequency by the number of channels used, improving transient response while operating each channel at an optimum frequency for efficiency. Thermal design is also simplified.An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required for high current applications.
A RUN/SS pin provides both soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when the overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC1629-6 includes a power good output pin that indicates when the output voltage is inside the ±10% tolerance window.
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 |
|---|---|---|---|---|---|
| LTC1629EG-6#PBF | SSOP-28 | G | E | 05-08-1640 (G28) | Yes |
| LTC1629EG-6#TRPBF | SSOP-28 | G | E | 05-08-1640 (G28) | 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 | |
|---|---|---|---|---|---|---|
| LTC1629EG-6#PBF | SSOP-28 | E | $7.15 | $5.95 | Yes | |
| LTC1629EG-6#TRPBF | SSOP-28 | E | $6.05 | 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 |
|---|---|---|---|
| DC449A-B | LTC3719CG LTC1629-6EG | 12Vin, 45Aout 4-Phase VRM, AMD Server (Hammer Processor) | Contact Factory | |
| Buy Now | |||
Applications
- Desktop Computers
- Internet Servers
- Large Memory Arrays
- DC Power Distribution Systems
People Who Viewed This Product Also Viewed
- LTC1629 - PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator
- LT8705 - 80V VIN and VOUT Synchronous 4-Switch Buck- Boost DC/DC Controller
- LT1787 - Precision, High Side Current Sense Amplifiers
- LT3845A - High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency
- LT3763 - 60V High Current Step-Down LED Driver Controller
- LTC3260 - Low Noise Dual Supply Inverting Charge Pump
- LTC6101 - High Voltage, High-Side Current Sense Amplifier in SOT-23
- LT4363 - High Voltage Surge Stopper with Current Limit
- LTC1983 - 100mA Regulated Charge-Pump Inverters in ThinSOT
- LT1210 - 1.1A, 35MHz Current Feedback Amplifier
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
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:
LTC1629
LTC1629-6
LTC1629-PG
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.
