Diodes AP7331 - Manual (Page 2)

AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2
2 of 13
www.diodes.com
January 2011
© Diodes Incorporated
Typical Application Circuit
1uF
IN
GND
EN
OUT
Enable
1uF
V
IN
V
OUT
AP7331
Fixed Output
1uF
IN
GND
EN
OUT
Enable
ADJ
R2
R1
1uF
V
IN
V
OUT
AP7331
Adjustable Output
Pin Descriptions
Pin Name
Pin Number
Description SOT25
(fixed)
DFN2020-6
(fixed)
SOT25
(adj)
DFN2020-6
(adj)
IN 1 3 1 3
Voltage input pin. Bypass to ground through at least
1µF capacitor
GND 2 2 2 2 Ground
EN 3 1 3 1 Enable input, active high
ADJ - - 4 6 Output feedback pin
NC 4 5, 6 - 5 No connection
OUT 5 4 5 4
Voltage output pin. Bypass to ground through 1µF
ceramic capacitor
Functional Block Diagram
IN
EN
GND
OUT
Gate
Driver
0.4V
Current Limit
and Thermal
Shutdown
Fixed Version
R
R
IN
EN
GND
ADJ
OUT
Gate
Driver
0.4V
Current Limit
and Thermal
Shutdown
Adjustable Version
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
+ =
2
R
1
R
1 REF V OUT V