LTC3730

U U LTC3730 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller FEATURES ■ 3-Phase Current Mode Controller with Onboard MOSFET Drivers ■ ±5% Output Current Match Optimizes Thermal Performance and Size of Inductors and MOSFETs ■ Operational Amplifier Accomodates Mode Switching ■ ±1% VREF Accuracy Over Temperature ■ Reduced Input and Output Capacitance ■ Reduced Power Supply Induced Noise ■ VOUT Programmable from 0.6V to 1.75V (IMVP III) ■ ±10% Power Good Output Indicator ■ 250kHz to 600kHz Per Phase, PLL, Fixed Frequency ■ PWM, Stage SheddingTM or Burst Mode® Operation ■ OPTI-LOOP® Compensation Minimizes COUT ■ Adjustable Soft-Start Current Ramping ■ 4V, VIN, Undervoltage RUN/SS Reset/Reattempt Circuit ■ Short-Circuit Shutdown Timer with Defeat Option ■ Overvoltage Soft Latch ■ Small 36-Lead Narrow (0.209”) SSOP Package U APPLICATIO S ■ Tablet Computers ■ High Performance Notebook Computers ■ High Output Current DC/DC Power Supplies DESCRIPTIO The LTC®3730 is a PolyPhase® synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 600kHz per phase to minimize the RMS losses in both the input and output filter capacitors. The 3-phase technique effectively triples the fundamental frequency, improving transient response while operating each controller at an optimal f...