Diodes AP3431 - Manual (Page 2)

Data Sheet
1.0MHz, 2.0A, Synchronous Step Down DC-DC Converter AP3431
Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
2
Pin Configuration
M Package
(SOIC-8)
1
2
3
4
8
7
6
5
Figure 2. Pin Configuration of AP3431 (Top View)
Pin Description
Pin Number Pin Name Function
1 VCC Supply input for the analog circuit
2 NC No connection
3 GND Ground pin
4 FB
Feedback pin. Receives the feedback voltage from a resistive
divider connected across the output
5 EN
Chip enable pin. Active high, internal pull-high with
200k
Ω resistor
6 PGND Power switch ground pin
7 SW Switch output pin
8 VIN Power supply input for the MOSFET switch