LTC1703
PRODUCTIONDual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID
- Part Models
- 4
- 1ku List Price
- Starting From $9.51
Overview
- Side 1 Output Is Compliant with Intel Mobile VID Specifications (Includes 5-Bit DAC)
- 0.9V to 2.0V Output Voltage with 25mV/50mV Steps
- Two Sides Run Out-of-Phase to Minimize CIN
- Precision Internal 0.8V ±1% Reference
- Two Independent PWM Controllers in One Package
- All N-Channel External MOSFET Architecture
- No External Current Sense Resistor
- 550kHz Switching Frequency Minimizes External Component Size
- Very Fast Transient Response
- Up to 25A Output Current per Channel
- Low Shutdown Current: < 100µA
- Small 28-Pin SSOP Package
The LTC1703 is a dual switching regulator controller optimized for high efficiency with low input voltages. It includes two complete, on-chip, independent switching regulator controllers. Each is designed to drive a pair of external N-channel MOSFET devices in a voltage mode feedback, synchronous buck configuration. The LTC1703 includes digital output voltage adjustment on side 1 that conforms to the Intel Mobile VID specification. It uses a constant-frequency, true PWM design switching at 550kHz, minimizing external component size and cost and optimizing load transient performance. The synchronous buck architecture automatically shifts to discontinuous and then to Burst Mode® operation as the output load decreases, ensuring maximum efficiency over a wide range of load currents.
The LTC1703 features an onboard reference trimmed to 1% and delivers better than 1.5% regulation at the converter outputs. An optional latching FAULT mode protects the load if the output rises 15% above the intended voltage. Each channel can be enabled independently; with both channels disabled, the LTC1703 shuts down and supply current drops below 100µA.
Applications
- Mobile Pentium® III Processor Systems
- Microprocessor Core and I/O Supplies
- Multiple Logic Supply Generator
- High Efficiency Power Conversion
Documentation
Data Sheet 1
Design Note 4
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1703CG#PBF | 28-Lead SSOP | ||
| LTC1703CG#TRPBF | 28-Lead SSOP | ||
| LTC1703IG#PBF | 28-Lead SSOP | ||
| LTC1703IG#TRPBF | 28-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC1703CG#PBF | PRODUCTION | |
| LTC1703CG#TRPBF | PRODUCTION | |
| LTC1703IG#PBF | PRODUCTION | |
| LTC1703IG#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1703
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
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