MIC28303 Datasheet, PDF (20/38 Pages) Microchip Technology – 50V, 3A Power Module

MIC28303
TABLE 3-1: PIN FUNCTION TABLE (CONTINUED)
Pin Number
49, 50
52, 53
55, 56
57
58
59
61, 62
63
Symbol
ANODE
BSTC
BSTR
FB
P_GOOD
EN
P_VDD
NC
Description
Anode Bootstrap Diode Input. Anode connection of internal bootstrap diode. This
pin should be connected to the P_VDD pin.
Bootstrap Capacitor. Connection to the internal bootstrap capacitor. Leave floating,
no connect.
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.
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 P_VDD.
Internal +5V Linear Regulator Output. P_VDD is the internal supply bus for the
device. In the applications with V_IN < +5.5V, P_VDD should be tied to V_IN to bypass
the linear regulator.
No Connection. Leave it floating.
DS20005464A-page 20
 2016 Microchip Technology Inc.