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Waveforms

Conditions:

Input Voltage = 24VDC

Output Current = 10A

Bandwidth Limit = 20 MHz

Trace:

Output Ripple, Volts/div = 50 mV

Horizontal Resolution = 5.0 µs/div

Figure 5. Output Ripple

Figure 6 shows the transient response for a load of change from 5A to 10A. The upper trace shows

minimal output voltage droop and overshoot during the sudden change in output current shown by the

lower trace.

Conditions:

Input Voltage = 24VDC

Output Current = 5A to 10A

Bandwidth Limit = 20 MHz

Traces:

Bottom Trace: Output Current

Amps/div = 5A

Top Trace: Output Voltage response

Volts/div = 100 mV

Horizontal Resolution = 200 µs/div

Figure 6. Transient Response

Figure 7 and Figure 8 show the drain voltage of Q1 with a 5A load. Figure 7 represents drain voltage of

Q1 at an input voltage of 24V and Figure 8 represents drain voltage at an input voltage of 32V. Drain of

Q1 sees twice the input voltage when it is off and during dead-time it exactly sees input voltage.

SNVA352C–July 2008–Revised May 2013 AN-1861 LM25037 Evaluation Board

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