MIC28303 datasheet(20/38 Pages) MICROCHIP

20 / 38 page

MIC28303

DS20005464A-page 20

 2016 Microchip Technology Inc.

49, 50

ANODE

Anode Bootstrap Diode Input. Anode connection of internal bootstrap diode. This

pin should be connected to the PVDD pin.

52, 53

BSTC

Bootstrap Capacitor. Connection to the internal bootstrap capacitor. Leave floating,

no connect.

55, 56

BSTR

Bootstrap Resistor. Connection to the internal bootstrap resistor and high-side

power MOSFET drive circuitry. Leave floating, no connect.

Feedback Input. Input to the transconductance amplifier of the control loop. The FB

pin is regulated to 0.8V. A resistor divider connecting the feedback to the output is

used to set the desired output voltage.

PGOOD

Power Good Output. Open-drain output. An external pull-up resistor to external

power rails is required.

Enable Input. A logic signal to enable or disable the buck converter operation. The

EN pin is CMOS compatible. Logic high enables the device, logic low shuts down

the regulator. In the disable mode, the input supply current for the device is

minimized to 4 µA typically. Do not pull EN to PVDD.

61, 62

PVDD

Internal +5V Linear Regulator Output. PVDD is the internal supply bus for the

device. In the applications with VIN < +5.5V, PVDD should be tied to VIN to bypass

the linear regulator.

No Connection. Leave it floating.

TABLE 3-1:

PIN FUNCTION TABLE (CONTINUED)

Pin Number

Symbol

Description

MIC28303 Datasheet(PDF) 20 Page - Microchip Technology