Connection diagram and pin description

L6739

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DocID026384 Rev 1

2

Connection diagram and pin description

Figure 4. Pin connections (top view)

2.1

Pin description

Table 2. Pin descriptions

Pin no.

Name

Function

1

VCCDR

Drivers section power supply.

Filter with 1

F MLCC to GND.

2LGATE

Low-side driver output.

Connect directly to the low-side MOSFET gate. A small series resistor can be useful to

reduce dissipated power especially in high frequency applications.

3

PHASE

High-side driver return path.

Connect to the high-side MOSFET source. This pin is also monitored for the adaptive

deadtime management.

4BOOT

High-side driver supply.

PHASE pin. The pin is internally connected through a switch to the VCCDR pin. See

Section 8 on page 17 for guidance in designing the capacitor value.

5UGATE

High-side driver output.

Connect to high-side MOSFET gate. A small series resistor may help in reducing the

PHASE pin negative spike as well as cooling the device.

6

PGOOD

Power Good.

It is an open-drain output set free after SS (with 3x clock cycle delay) as long as the out-

put voltage monitored through VSEN is within specifications. Pull-up to 3.3 V (typ.) or

lower, if not used it can be left floating.

7EN

Enable pin.

Pull-high to < 5 V to enable conversion, 10

A pull-down provided.