AP1115AY33G Datasheet, PDF (2/8 Pages) Diodes Incorporated – 0.6A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR

AP1115
Typical Applications Circuit
5V
VIN
GND
VOUT
C1
100 uF
3.3V/0.5A
C2
100 uF
AP1115 A (5V/3.3V Fixed Output)
5V
C1
100uF
VIN
Adj
VOUT
R1 R2
121Ω 121Ω
V_O
2.5V/0.5A
C2
100uF
AP1115 A (5V/2.5V Adj Output)
5V
VOUT
VIN
GND
C1
100uF
3.3V/0.5A
C2
100 uF
AP1115 B (5V/3.3V Fixed Output)
5V
C1
100uF
VOUT
VIN
Adj
V_O
2.5V/0.5A
R1
121 Ω
C2
100 uF
R2
121 Ω
AP1115B (5V/2.5V Adj Output)
Note
:
V_o
=
V_REF
x
(1+
R2
R1
)
Pin Descriptions
Pin Name
Adj (GND)
V_OUT
V_IN
I/O
Function
I
A resistor divider from this pin to the V_OUT pin and ground sets the output voltage (Ground only for Fixed-
Mode).
The output of the regulator. A minimum of 10uF capacitor (0.15Ω ≤ ESR ≤ 20Ω) must be connected from this
O
pin to ground to insure stability.
The input pin of regulator. Typically a large storage capacitor (0.15Ω ≤ ESR ≤ 20Ω) is connected from this pin
I
to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load
transient response. This pin must always be 1.3V higher than V_OUT in order for the device to regulate properly.
AP1115
Document number: DS31025 Rev. 11 - 2
2 of 8
www.diodes.com
August 2012
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