AIC1086
1.5A Low Dropout Positive Regulator
FEATURES
Dropout Voltage 1.3V at 1.5A Output Current.
Fast Transient Response.
Line Regulation, typical at 0.015%.
Load Regulation, typical at 0.1%.
Current Limiting and Thermal Protection.
Adjustable Output Voltage or Fixed at 1.8V, 2.5V,
2.85V, 3.3V, and 5V.
Standard 3-Pin Power Packages.
DESCRIPTION
The AIC1086 is a low dropout three-terminal
regulator designed to provide output current up
to 1.5A. The device is available in an adjustable
version and fixed output voltage of 1.8V, 2.5V,
2.85V, 3.3V and 5V. Dropout voltage of
maximum of 1.5V is guaranteed at 1.5A output
current. The quality of low dropout voltage and
fast transient response make this device ideal
for low voltage microprocessor applications.
The AIC1086 requires output capacitance of a
minimum of 10µF for stability. Built-in output
current limiting and thermal limiting provide
maximal protection to the AIC1086 against fault
conditions.
APPLICATIONS
Post Regulator for Switching Supply.
Battery Chargers.
PC Add-On Card.
TYPICAL APPLICATION CIRCUIT
V
IN
5V
3
AIC1086
1 ADJ
C1 +
10µF
2
V
REF
V
OUT
3.3V
RF1
125Ω
+
1%
C2
RF2
10µF
205Ω
1%
V
REF
=V
OUT
- V
ADJ
=1.25V (typ.)
V
OUT
=V
REF
x (1+RF2/RF1)+ I
ADJ
x RF2
I
ADJ
=55µA (typ.)
(1) C1 needed if device is far away from filter
capacitors.
(2) C2 required for stability.
Adjustable Voltage Regulator
V
IN
5V
3
AIC1086-33
1
2
V
OUT
3.3V
C1 +
10µF
GND
+
C2
10µF
Fixed Voltage Regulator
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1086P-05
010405
1
AIC1086
ORDERING INFORMATION
AIC1086-XX XX XX
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
BG: BAG (for SOT-223)
PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220
Y: SOT-223
C: COMMERCIAL
P: LEAD FREE COMMERCIAL
OUTPUT VOLTAGE
DEFAULT: ADJUSTABLE
18: 1.8V
25: 2.5V
28: 2.85V
33: 3.3V
50: 5.0V
PIN CONFIGURATION
TO-252 (CE&PE)
TOP VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
TO-263 (CM&PM)
TOP VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
1
2
3
1
2
3
TO-220
(CT&PT)
FRONT VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
1 2
3
Example: AIC1086-28CETR
2.85V version in TO-252 Package &
Taping & Reel Packing Type
AIC1086-28PMTR
2.85V version in TO-263 Lead Free
Package & Taping & Reel Packing
Type
SOT-223
(CY&PY)
TOP VIEW
1: ADJ
2: VOUT (TAB)
3: VIN
1
2
3
SOT-223 Marking
Part No.
AIC1086
AIC1086-18XY
AIC1086-25XY
AIC1086-28XY
AIC1086-33XY
AIC1086-50XY
CY
1086
AX18
AX25
AX28
AX33
AX50
PY
1086P
AX18P
AX25P
AX28P
AX33P
AX50P
2
AIC1086
ABSOLUTE MAXIMUM RATINGS
VIN pin to ADJ/ GND pin ...........................…….......…….....…………............................ 7V
Operating Junction Temperature Range ............…….....………...................... 0°C ~ 125°C
Storage Temperature Range
Maximum Junction Temperature
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (Junction to Case)
...............................…………................. -65°C ~ 150°C
125°C
260°C
TO-220 ………........……...…………... 3°C /W
TO-252 …....……....………………..12.5°C /W
SOT-223
Thermal Resistance Junction to Ambient
TO-252
…....……..………..………..15°C /W
…………………………..… 100°C/W
….....…….....……………... 60°C /W
…....……....……………….. 50°C /W
TO-263 .………………………………....3°C /W
(Assume no ambient airflow, no heatsink) TO-263
TO-220
SOT-223 …..……..……...…..……... 155°C /W
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
3
AIC1086
ELECTRICAL CHARACTERISTICS
(V
IN
=5V, T
J
=25°C, I
O
=10mA, unless otherwise specified) (Note1)
PARAMETER
Reference Voltage
TEST CONDITIONS
AIC1086 (ADJ), T
J
=25°C
0°C≤T
J
≤125°C
AIC1086-18, V
IN
=3.3V
AIC1086-25, V
IN
=5V
MIN.
1.238
1.225
1.78
2.47
2.82
3.26
4.95
TYP.
1.25
1.25
1.80
2.50
2.85
3.30
5.00
0.015
0.035
0.1
0.2
1.3
MAX.
1.262
1.275
1.82
2.53
2.88
3.33
5.05
0.2
0.2
0.3
0.4
1.5
UNIT
V
Output Voltage
AIC1086-28, V
IN
=5V
AIC1086-33, V
IN
=5V
AIC1086-50, V
IN
=7V
2.75≤V
IN
≤7V,
V
OUT
=1.25V
V
Line Regulation
T
J
=25°C
0°C≤TJ≤125°C
%
Load Regulation
T
J
=25°C, I
O
=10mA ~1.5A
0°C≤T
J
≤125°C
∆V
OUT
,
∆V
REF
=1%, I
O
=1.5A
0°C≤T
J
≤125°C
0°C≤T
J
≤125°C
2.75≤V
IN
≤7V,
10mA≤
IO
≤
1.5A
0°C≤T
J
≤125°C
2.75≤V
IN
≤7V,
10mA≤I
O
≤1.5A
0°C≤T
J
≤125°C
I
O
=0.5A, 0°C≤T
J
≤125°C
2.65≤V
IN
≤7V
0°C≤T
J
≤125°C
10Hz≤f≤10KHz
120Hz input ripple,C
OUT
=25µF
60
1.5
%
Dropout Voltage
Current Limit
Adjusted Pin Current (I
ADJ
)
Adjusted Pin Current Change
(∆I
ADJ
)
Temperature Stability
GND Current
Minimum Load Current
RMS Output Noise (% of V
OUT
)
Ripple Rejection Ratio
V
A
2.0
55
120
µA
µA
%
0.2
0.5
10
5
0.003
72
5
14
10
mA
mA
%
dB
Note 1: Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low ON time.
Note 3: Current limit is measured by pulsing a short time.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops
100mV below the value measured with a 1V differential.
4
AIC1086
TYPICAL PERFORMANCE CHARACTERISTICS
5
Minimum Input/ Output Differential (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
200
400
600
800
1000
1200 1400
1600
Minimum Operating Current
4
T
A
=125°C
T
A
=0°C
T
A
=50°C
T
A
=125°C
3
T
A
=25°C
T
A
=0°C
2
1
0
1
2
Input/ Output Differential (V)
Fig. 1 AIC1086 Min. Load Current
(Adjustable Version)
3
4
5
6
7
8
9
Output Current (mA)
Fig. 2 AIC1086 Dropout Voltage
0.09
1.6
Thermal Regulation (%/W)
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.5
I
OUT
=500mA (30mS Puls)
T
A
=125°C
Output Voltage Deviation (%)
1.2
0.8
0.4
0.0
-0.4
-0.8
-1.2
-1.6
I
OUT
=0.5A
1.0
1.5
2.0
2.5
3.0
3.5
Power (Watt)
Fig. 3 AIC1086 (ADJ) Power vs. Thermal Regulation
-20
Temperature (°C)
Fig. 4 AIC1086 (ADJ) Temperature Stability
0
20
40
60
80
100
120
140
-20
Ripple Rejection Ratio (dB)
-30
-40
C
OUT
=3.3µF
C
OUT
=10µF
-50
-60
-70
-80
1
10
2
3
4
5
6
7
C
OUT
=25µF
10
10
Frequency (Hz)
10
10
10
10
Fig. 5 AIC1086 (ADJ) Ripple Rejection Ratio (dB)
5
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