Datasheet Linear Technology LTC1873

LTC1873
Dual 550kHz Synchronous
2-Phase Switching Regulator
Controller with 5-Bit VID U FEATURES
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в–  DESCRIPTIO The LTCВ®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. The LTC1873 includes digital output voltage adjustment on side 1 that conforms to the Intel
Desktop VID specification. A constant-frequency, true PWM
design minimizes external component size and cost and
optimizes load transient performance. 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 …