IL2576-xx
ADJUSTABLE OUTPUT, LOW-RIPPLE POWER SUPPLY
A 3A power supply that features an adjustable output voltage is shown in Figure 10. An additional L-C filter that reduces the
output ripple by a factor of 10 or more is included in this circuit.
FIGURE 10. 1.2V to 55V Adjustable 3A Power Supply with Low Output Ripple
Definition of Terms
BUCK REGULATOR
A switching regulator topology in which a higher voltage is converted to a lower voltage. Also known as a step-down switching
regulator.
BUCK-BOOST REGULATOR
A switching regulator topology in which a positive voltage is converted to a negative voltage without a transformer.
DUTY CYCLE (D)
Ratio of the output switch’s on-time to the oscillator period.
CATCH DIODE OR CURRENT STEERING DIODE
The diode which provides a return path for the load current when the IL2576 switch is OFF.
EFFICIENCY (η)
The proportion of input power actually delivered to the load.
Rev. 02
IKSEMICON [ IK SEMICON CO., LTD ]
