LM20144

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SNVS529G – OCTOBER 2007 – REVISED MARCH 2013

TYPICAL PERFORMANCE CHARACTERISTICS

Unless otherwise specified: CIN = COUT = 100 µF, L = 1.0 µH (Coilcraft MSS1038), VIN = 5V, VOUT = 1.2V, RLOAD = 1.2Ω,

fSW = 1 MHz, TA = 25°C for efficiency curves, loop gain plots and waveforms, and TJ = 25°C for all others.

Efficiency

Efficiency

vs.

vs.

Load Current (VIN = 5V, fSW = 1 MHz)

Load Current (VIN = 3.3V, fSW = 1 MHz)

Figure 1.

Figure 2.

Efficiency

Efficiency

vs.

vs.

Load Current (VIN = 5V, fSW = 500 kHz)

Load Current (VIN = 3.3V, fSW = 500 kHz)

Figure 3.

Figure 4.

High-Side FET Resistance

Low-Side FET Resistance

vs.

vs.

Temperature

Temperature

Figure 5.

Figure 6.

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