ncp5901 ON Semiconductor, ncp5901 Datasheet - Page 2

• Manufacturer Part Number: ncp5901
• Description: Ncp5901 Vr12 Compatible Synchronous Buck Mosfet Drivers
• Manufacturer: ON Semiconductor

Table 1. Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
Symbol
DRVH
DRVL
FLAG
PWM
GND
VCC
BST
SW
EN
PWM
VCC
EN
Floating bootstrap supply pin for high side gate driver. Connect the bootstrap capacitor between this pin
and the SW pin.
Control input. The PWM signal has three distinctive states: Low = Low Side FET Enabled, Mid = Diode
Emulation Enabled, High = High Side FET Enabled.
Logic input. A logic high to enable the part and a logic low to disable the part.
Power supply input. Connect a bypass capacitor (0.1 mF) from this pin to ground.
Low side gate drive output. Connect to the gate of low side MOSFET.
Bias and reference ground. All signals are referenced to this node (QFN Flag).
Switch node. Connect this pin to the source of the high side MOSFET and drain of the low side MOSFET.
Thermal flag. There is no electrical connection to the IC. Connect to ground plane.
High side gate drive output. Connect to the gate of high side MOSFET.
Fault
PWM
VCC
BST
Logic
EN
Figure 2. Block Diagram
Figure 1. Pin Diagram
1
http://onsemi.com
Pre−OV
(Top View)
UVLO
FLAG
9
2
Conduction
Anti−Cross
Description
DRVH
SW
GND
DRVL
Detection
ZCD
VCC
BST
DRVH
SW
DRVL