AP1117
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Features
General Description
AP1117 is a low dropout positive adjustable or
fixed-mode regulator with minimum of 1A output
current capability. The product is specifically
designed to provide well-regulated supply for low
voltage IC applications such as high-speed bus
termination and low current 3.3V logic supply.
AP1117 is also well suited for other applications
such as VGA cards. AP1117 is guaranteed to have
lower than 1.4V dropout at full load current making
it ideal to provide well-regulated outputs of 1.25 to
5.0 with 6.4V to 12V input supply.
- 1.4V maximum dropout at full load current
- Fast transient response
- Output current limiting
- Built-in thermal shutdown
- Packages: SOT223, TO263, TO252, TO220,
SOT89
- Good noise rejection
- 3-Terminal Adjustable or Fixed 1.5V, 1.8V, 1.9V,
2.5V, 3.3V, 5.0V
Applications
- PC peripheral
- Communication
Ordering Information
AP 1117 X XX X X
Package
Low Dropout Regulator
E : SOT223-3L
K : TO263-3L
D : TO252-3L
T : TO220-3L
Y : SOT89-3L
Vout
Packing
Lead Free
Blank : ADJ Blank : Normal
15 : 1.5V
L : Lead Free Package
18 : 1.8V
19: 1.9V
25 : 2.5V
33 : 3.3V
50 : 5.0V
Blank : Tube
A : Taping
Typical Circuit
5V
5V
C1
100uF
C1
100uF
Vin
Vin
Vout
GND
Vo
Vout
3.3V/1A
C2
100uF
Adj
Tab is Vout
R1
121 Ω
R2
121 Ω
2.5V/1A
C2
100uF
Tab is Vout
( 5V/3.3V fixed output )
( 5V/2.5V ADJ output )
Note: Vo = VREF ∗ (1+
R2
)
R1
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.2 Jan 13, 2006
1/11
AP1117
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Pin Descriptions
NAME
I/O
PIN #
FUNCTION
Adj (GND)
I
1
A resistor divider from this pin to the Vout pin and ground sets the
output voltage. (Ground only for Fixed-Mode)
Vout
O
2
The output of the regulator. A minimum of 10uF capacitor (0.15Ω
≤ ESR ≤ 20Ω) must be connected from this pin to ground to insure
stability.
3
The input pin of regulator. Typically a large storage capacitor
(0.15Ω ≤ ESR ≤ 20Ω) is connected from this pin 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 Vout in order for the device to
regulate properly.
Vin
I
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
Vin
DC Supply Voltage
-0.3 to 12
V
TOP
Operating Junction Temperature Range
0 to +125
oC
TMJ
Maximum junction Temperature
150
oC
330
850
1050
1150
mW
-65 to +150
oC
Power Dissipation(No heat sink ;No air flow)
o
o
TA=25 C, TJ=125 C
PD
SOT89
SOT-223
TO-252
TO-220/263
TST
Storage Temperature
Anachip Corp.
www.anachip.com.tw
Rev.1.2 Jan 13, 2006
3/11
