LM5037

SNVS578D – NOVEMBER 2008 – REVISED MAY 2015

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Time = 5 µs/div

Bandwidth Limit = 20 MHz

Time = 200 µs/div

Bandwidth Limit = 20 MHz

Figure 32. Output Ripple

Figure 33. Transient Response

Figure 34. Efficiency vs. Load Current

9 Power Supply Recommendations

The VCC pin requires a local decoupling capacitor that is connected to GND. This capacitor ensures stability of

the internal regulator from the VIN pin. The decoupling capacitor also provides the current pulses to drive the

gates of the external MOSFETs through the driver output pins. Place the decoupling capacitor close to the VCC

and PGND pins and track it directly to those pins.

The two ground pins (PGND and AGND) must be connected together with a short, direct PCB connection.

32

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