Typical applications circuit, Available options, Pin descriptions – Diodes AP2181/ AP2191 User Manual
Page 2
AP2181/ AP2191
Document number: DS31563 Rev. 7 - 2
2 of 17
March 2013
© Diodes Incorporated
AP2181/ AP2191
Typical Applications Circuit
0.1uF
IN
GND
EN
OUT
ON
120uF
Power Supply
2.7V to 5.5V
0.1uF
OFF
FLG
Load
10k
10uF
AP2191 Enable Active High
Available Options
Part Number
Channel
Enable Pin (EN)
Current Limit
(typ)
Recommended Maximum Continuous
Load Current
AP2181 1
Active
Low
2.1A
1.5A
AP2191 1
Active
High
2.1A
1.5A
Pin Descriptions
Pin
Name
Pin Number
Function
SO-8 MSOP-8EP SOT25 U-DFN2018-6
GND 1
1
2
1 Ground
IN
2, 3
2, 3
5
2
Voltage input pin (all IN pins must be tied together externally)
EN
4
4
4
3
Enable input, active low (AP2181) or active high (AP2191)
FLG 5 5 3
4
Over-current and over-temperature fault report; open-drain flag is active low when
triggered
OUT
6, 7
6, 7
1
5, 6
Voltage output pin (all OUT pins must be tied together externally)
NC
8
8
N/A
N/A
No internal connection; recommend tie to OUT pins
Exposed tab
-
Exposed tab
-
Exposed tab
Exposed pad.
It should be connected to GND and thermal mass for enhanced thermal
impedance. It should not be used as electrical ground conduction path.