LTC1873 Datasheet PDF | Linear Technology

Linear Technology LTC1873

The LTC1873 includes digital output voltage adjustment on side 1 that conforms to the Intel Desktop VID specification. The synchronous buck architecture automatically shifts to discontinuous and then to Burst ModeTM operation as the output load decreases, ensuring maximum efficiency over a wide range of load currents. The LTC1873 features an onboard reference trimmed to 1% and delivers better than 1.5% regulation at the converter outputs over all combinations of line, load and temperature.

Part No.	LTC1873
Datasheet	LTC1873 Download
Manufacturer	Linear Technology
Description	Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
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FEATURES

s s DESCRIPTIO s s s s s s s s s s Two Independent PWM Controllers in One Package Side 1 Output Is Compliant with Intel Desktop VRM 8.4 Specifications (Includes 5-Bit VID DAC) 1.3V to 3.5V Output Voltage with 50mV/100mV Steps Two Sides Run Out-of-Phase to Minimize CIN All N-Channel External MOSFET Architecture No External Current Sense Resistors Required Precison Internal 0.8V ± 1% Reference 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 U APPLICATIO S s s s s Microprocessor Core and I/O Supplies Multiple Logic Supply Generator High Efficiency Power Conversion Chipset Power Supply The LTC®1873 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 MOSFETs in a voltage mode feedback, synchronous buck configuration.