U U FEATURES ■ No Current Sense Resistors Required ■ Out-of-Phase Controllers Reduce Required Input Capacitance ■ VOUT2 Tracks 1/2 VREF ■ Symmetrical Source/Sink Output Current Capability (VOUT2) ■ Spread Spectrum Operation (When Enabled) ■ Wide VIN Range: 2.
75V to 9.
8V ■ Constant Frequency Current Mode Operation ■ 0.
6V ±1.
5% Voltage Reference (VOUT1) ■ Low Dropout Operation: 100% Duty Cycle ■ True PLL for Frequency Locking or Adjustment ■ Internal Soft-Start Circuitry ■ Power Good Output Voltage Monitor ■ Output Overvoltage Protection ■ Micropower Shutdown: IQ = 9μA ■ Tiny Low Profile (4mm × 4mm) QFN and Narrow SSOP Packages U APPLICATIO S ■ DDR, DDR II and QDR Memory ■ SSTL, HSTL Terminat...

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