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 2005 Semtech Corp.

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POWER MANAGEMENT

SC2434

Applications Information (Cont.)

The transient response for a maximum load step changes (10A to 60A) is shown in Fig. 14, where one can see that

accurate drooping will help to reduce the amount of output capacitance needed. Please notice that using more

multilayer ceramic capacitors for better high frequency decoupling can reduce the narrow voltage spikes.

Fig. 13 - Transient response and the test condition:

Step Load from 10A to 60A

Output Capacitors: 14 units of 560uF OSCON caps, 38 units of 10uF ceramic caps

Ch1: Output Voltage

Ch4: Output Current (1A = 27.5mV di/dt = 370A/uS)

Meet Intel P-4 spec

Output Voltage

Load Current