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The DIO60120 is a high-efficiency synchronous step-down DC-DC regulator. The DIO60120 can achieve up to 2 A continuous output current from a 2.5 V to 5.5 V input voltage with excellent load and line regulation. The output voltage can be regulated to as low as 0.6 V. Constant-on-time control provides a fast transient response and eases loop stabilization. The DIO60120 includes an automatically entered power save mode to maintain high efficiency down to very light loads for extending the system battery run-time. The DIO60120 is ideal for a wide range of applications, including portable navigation devices, set top boxes and media players.