ap3421 BCD Semiconductor Manufacturing Limited, ap3421 Datasheet - Page 3

• Manufacturer Part Number: ap3421
• Description: 1.3mhz, Dual 1.0a Synchronous Step-down Converters
• Manufacturer: BCD Semiconductor Manufacturing Limited

Pin Description (Continued)
Aug. 2010 Rev. 1.2
1.3MHz, Dual 1.0A Synchronous Step-down Converters
Pin Number
10
11
8
9
Pin Name
VMON
AGND
POR
FB1
Power on reset output pin. Monitors FB1, FB2 output
voltage levels and V
voltage drop is detected on FB1 or FB2 or VIN, and is
Hi-Z during normal operation
Voltage monitor–supervisor for one external voltage
(could be input voltage). The POR output is triggered if
this output falls below the VMON threshold
Feedback from VO1. Connect voltage divider to the
load side of VO1 output inductor-capacitor filter
Signal ground connection. Provide a star connection
between this pin and PGND pin
3
BCD Semiconductor Manufacturing Limited
IN
Function
. POR is pulled low if an output
Preliminary Datasheet
AP3421/A