LTC3734 - Single-Phase, High Efficiency DC/DC Controller for Intel Mobile CPUs
Features
- Wide Input Voltage Range: 4V to 30V
- ±1% Output Voltage Accuracy
- 6-Bit IMVP-IV VID Code: VOUT = 0.7V to 1.708V
- Intel Compatible Power Saving Mode (PSIB)
- Power Good Output with Adaptive Masking
- Lossless Voltage Positioning
- Resistor Programmable VOUT at Boot-Up and Deeper Sleep State
- Resistor Programmable Deep Sleep Offset
- Programmable Fixed Frequency: 210kHz to 550kHz
- Adjustable Soft-Start Current Ramping
- Foldback Output Current Limit
- Short-Circuit Shutdown Timer with Defeat Option
- Overvoltage Protection
- Available in 32-Lead 5mm × 5mm × 0.8mm (Profile) QFN Package
Typical Application
Description
The LTC3734 is a single-phase synchronous step-down switching regulator controller that drives all N-channel power MOSFETs in a constant frequency architecture. The output voltage is programmable by six VID bits during normal operation and by external resistors during initial boot-up and deeper sleep state. The LTC3734 drives its output stage at frequencies up to 550kHz. Powerful onchip gate drivers eliminate the need for external gate driver ICs, thus simplifying the design.An Intel compatible PSIB input is provided to select between two modes of operation. Fully enhanced synchronous mode achieves a very small output ripple and very fast transient response while power saving mode realizes very high efficiency. OPTI-LOOP® compensation allows the transient response to be optimized for a wide range of output capacitance and ESR values.
The LTC3734 is available in a small 5mm × 5mm QFN package. For 2-phase applications refer to the LTC3735.
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 |
|---|---|---|---|---|---|
| LTC3734EUH#PBF | 5x5 QFN-32 | UH | E | 05-08-1693 | Yes |
| LTC3734EUH#TRPBF | 5x5 QFN-32 | UH | E | 05-08-1693 | 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 | |
|---|---|---|---|---|---|---|
| LTC3734EUH#PBF | 5x5 QFN-32 | E | $4.64 | $3.05 | Yes | |
| LTC3734EUH#TRPBF | 5x5 QFN-32 | E | $3.15 | 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 |
|---|---|---|---|
| DC538A | LTC3734EUH | Single Phase IMVP4 Power Supply, Vin=7.5V to 24V, Vout= 0.6V-1.75V@15A | Contact Factory | |
| Buy Now | |||
Applications
- Mobile and Desktop Computers
- Internet Servers
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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.
