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AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Features
* * * * *
General Description
AP1086 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1.5A 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. AP1086 is also well suited for other applications such as VGA cards. AP1086 is guaranteed to have <1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25V to 5.0V with 4.7 to 12V input supply by different output voltage.
3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V 1.4V Maximum Dropout at Full Load Current Fast Transient Response Built-in Thermal Shutdown Output Current Limiting
Ordering Information
AP1086 X X X X
Low Dropout Regulator
Package D : TO252-3L K : TO263-3L T : TO220-3L
Vout Blank : Adj 15 = 1.5V 18 = 1.8V 25 = 2.5V 33 = 3.3V 50 = 5.0V
Lead Free
Packing
Blank : Normal Blank : Tube L : Lead Free Package A : Taping
Typical Application
5V to 3.3V Fixed Mode Regulator
5V C1 100uF Vin Vout GND Tab is Vout 3.3V/1.5A C2 100uF Vin Vout Adj Tab is Vout R1 121 R2 121 5V
Adjustable Regulator
C1 100uF
VOUT=Vref x (1+R2/R1) 2.5V/1.5A C2 100uF
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.1.3 Jun. 8, 2005 1/9
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Block Diagram
Vin
3
2
Vout
+ +
1.25V CURRENT LIMIT +
+
THERMAL SHUTDOWN
1
Adj (GND)
Connection Diagram
3 PIN TO263 FRONT VIEW 3 PIN TO252 FRONT VIEW 3 2 1 Tab is Vout Vin Vout Adj (GND) Tab is Vout 3 PIN TO220 FRONT VIEW 3 2 1 Vin Vout Adj (GND)
3 2 1
Vin Vout Adj (GND)
Tab is Vout
Pin Descriptions
NAME Adj (GND) Vout O I/O PIN # 1 2 FUNCTION Adjustable (Ground only for fixed mode) The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor 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 1.4V higher than Vout in order for the device to regulate properly.
Vin
I
3
Anachip Corp. www.anachip.com.tw 2/9
Rev.1.3 Jun. 8, 2005
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Absolute Maximum Ratings
Symbol Vin PD TST TOP Parameter DC Supply Voltage Power Dissipation Storage Temperature Operating Junction Temperature Range Rating Unit -0.3 to 12 V Internally Limited o -65 to +150 C o 0 to +150 C
Electrical Characteristics
PARAMETER
Reference Voltage Output Voltage AP1086-Adj AP1086-1.5 AP1086-1.8 AP1086-2.5 AP1086-3.3 AP1086-5.0 Line Regulation AP1086-XXX AP1086-Adj AP1086-1.5 AP1086-1.8 Load Regulation AP1086-2.5 AP1086-3.3 AP1086-5.0 Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Thermal Regulation Ripple Rejection RMS Noise (% of VOUT) Temperature Stability Thermal Resistance Junction-to-Ambient (No heat sink ;No air flow) Thermal Resistance Junction-to-Case
(Under Operating Conditions) CONDITIONS
TJ=25 C,(VIN-VOUT)=1.5V,IO=10mA o IOUT = 10mA, TJ = 25 C, 3VVIN12V o IOUT = 10mA, TJ = 25 C, 3.3VVIN 12V IOUT = 10mA, TJ = 25oC, 4VVIN12V IOUT = 10mA, TJ = 25oC, 4.8VVIN 12V o IOUT = 10mA, TJ = 25 C, 6.5VVIN 12V IO=10mA, VOUT+1.5Vo
MIN
1.225 1.470 1.764 2.450 3.235 4.900 1. 6 -
TYP
1.250 1.500 1.800 2.500 3.300 5.000 12 15 20 26 40 1.3 5 0.008 60 0.003 0.5 101 83 86 15 0.65/2.7 0.65/2.7
MAX UNIT
1.275 1.530 1.836 2.550 3.365 5.100 0.2 1 15 18 25 33 50 1.4 10 0.04 70 O
V V V V V V % % mV mV mV mV mV V A mA %/W dB % % C/W C/W
AP1086-Adj/-2.5 IOUT = 1.5A, VOUT=1%VOUT /-3.3/-3.6/-5.0 AP1086-Adj/-2.5 (VIN-VOUT) = 5V /-3.3/-3.6/-5.0 o o 0 CTj125 C AP1086-XXX TA=25, 30ms pulse F=120Hz,COUT=25uF Tantalum, IOUT=1.5A AP1086-XXX VIN=VOUT+3V 10Hz f 10KHz IO=10mA TO-252 TO-263 TO-220 TO-252: Control Circuitry/Power Transistor TO-263: Control Circuitry/Power Transistor TO-220: Control Circuitry/Power Transistor
O
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18" from the package. Note 2:Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note 3:Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA.
Anachip Corp. www.anachip.com.tw 3/9
Rev.1.3 Jun. 8, 2005
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Functional Description
Introduction The AP1086 adjustable or fixed-mode Low Dropout (LDO) regulator is a 3 terminal device which can easily be programmed by internal mask change to any voltages within the range of 1.25V to Vin-1.4V. The AP1086 only needs 1.4V differential between Vin and Vout to maintain output regulation. In addition, the output voltage tolerances are also extremely tight and they include the transient response as part of the specification. For example, Intel VRE specification calls for a total of +/- 100mV including initial tolerance, load regulation and 0 to 1.5A load step. The AP1086 is specifically designed to meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with the need for fewer output capacitors. Load Regulation Since the AP1086 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode. Stability The AP1086 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient response. Thermal Design The AP1086 incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the maximum allowable junction temperature. Although this device can operate with junction temperatures in the range of 150oC, it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the junction temperature is kept below the temperature. Layout Consideration The output capacitors must be located as close to the Vout terminal of the device as possible. It is recommended to use a section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any high frequency oscillation that may result due to excessive trace inductance.
Anachip Corp. www.anachip.com.tw 4/9
Rev.1.3 Jun. 8, 2005
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Typical Performance Characteristics
2. 0 1. 8 0.20
Output Voltage Deviation (%)
1. 6
0 I load=1.5A
Dropout Voltage (V)
1. 4 1. 2 1. 0 0. 8 0. 6 0. 4 0. 2 0 0 0.25 Tj = 125 oC Tj = 25 oC
-0.20
-0.40
-0.80
Dropout Voltage vs Output Current
2 1.5 1
Output Current (A)
0.5
0.75
1.0
1.25
1.5
-1
-25
0
Load Regulation vs Temperature
Temperature ( oC)
25
50
75
100
125
Output Voltage Change (%)
1 0. 5 0 -0.5 -1 -1.5 -2 -50 -25 0 25 50 75 100 125 150
0.8
Output Voltage Deviation (%)
0.6
0.4
0.2
0
Percent Change in Output Voltage vs Temperature
Output Voltage Deviation (mV) Input Voltage (V) Load Current (A) Output Voltage Deviation (mV) 7.5 6.5 5.5 40 20 0 -20 -40 Cin=1uF Cout=10uF Tantalum 30 20 10 0 -10 -20 2 1 0 -1 0 10 20
Temperature ( oC)
2
4
Line Regulation
Cin=1uF Cout=10uF Tantalum Preload=100mA
Input Voltage (V)
6
8
10
12
0
20
40
60
TIME (us)
80
100 120 140 160 180 200
30
Line Transient Response
Load Transient Response
TIME (us)
40
50
60
70
80
90
100
Anachip Corp. www.anachip.com.tw 5/9
Rev.1.3 Jun. 8, 2005
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Marking Information
( Top View) Logo
Part Number 1086 for ADJ 86-VV : 15 for 1.5V 18 for 1.8V 25 for 2.5V 33 for 3.3V 50 for 5V
86-VV YYWWX X
Blank: normal L: Lead Free Package
YY : Year WW: Nth week X : Internal code ( Optional)
(TO252-3L)
( Top View) Logo
Part Number VV : 15 for 1.5V 18 for 1.8V 25 for 2.5V 33 for 3.3V 50 for 5V Blank for ADJ
1086-VV YYWWX X
Blank: normal L: Lead Free Package
YY : Year WW: Nth week X : Internal code ( Optional)
(TO220-3L / TO263-3L)
Anachip Corp. www.anachip.com.tw 6/9
Rev.1.3 Jun. 8, 2005
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Package Dimension
(1) TO263-3L
L2
E
10.9
D
9.1
L
L3
1.3 e b b2
2.54
Land Pattern Recommendation (Unit: mm)
C
3 L1
Symbol A b b2 C C2 D E e L L1 L2 L3
Dimensions In Millimeters Min. Nom. Max. 4.06 4.45 4.83 0.51 0.75 0.99 1.14 1.27 1.40 0.38 TYP. 1.14 1.27 1.40 8.65 9.15 9.65 9.65 9.97 10.29 2.54 BSC. 14.61 15.24 15.88 2.28 2.54 2.80 1.30 2.92 1.27 1.52 1.78
Dimensions In Inches Min. Nom. Max. 0.160 0.175 0.190 0.020 0.030 0.039 0.045 0.050 0.055 0.015 TYP. 0.045 0.050 0.055 0.341 0.380 0.575 0.090 0.050 0.360 0.393 0.100 BSC. 0.600 0.100 0.051 0.060 0.380 0.405 0.625 0.110 0.115 0.070
Anachip Corp. www.anachip.com.tw 7/9
C2
Rev.1.3 Jun. 8, 2005
A
15.7
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
(2) TO252-3L
5.6 E b2 L2 5.6 11.0
2.25 2.0
7.2 1.2 H SEE NOTE2 C1 L SEATING PLANE
L1
D
b e1
e
Land Pattern Recommendation (Unit: mm)
A1
C
Notes: 1. 2.
JEDEC Outline: TO-252 AB Mils suggested for positive contact at mounting.
Symbol A A1 b b2 C C1 D E e e1 H L L1 L2
Dimensions In Millimeters Min. Nom. Max. 2.18 2.29 2.40 0.89 1.14 0.61 TYP. 5.20 5.35 5.50 0.45 0.52 0.58 0.45 0.52 0.58 5.40 5.57 6.20 6.35 6.58 6.80 2.28 BSC. 4.57 BSC. 9.00 9.70 10.40 0.51 0.64 0.83 1.02 0.88 1.27
Dimensions In Inches Min. Nom. Max. 0.086 0.090 0.094 0.035 0.045 0.024 TYP. 0.205 0.211 0.217 0.018 0.020 0.023 0.018 0.020 0.023 0.213 0.219 0.244 0.250 0.259 0.268 0.090 BSC. 0.180 BSC. 0.354 0.382 0.409 0.020 0.025 0.033 0.040 0.035 0.050
Anachip Corp. www.anachip.com.tw 8/9
A
Rev.1.3 Jun. 8, 2005
AP1086
1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
(3) TO220-3L
E Q
P
A
F
H1 D
b1 L
L1
b e e1
C J1
Symbol A b1 b C D E e e1 F H1 J1 L L1 oP Q
Dimensions In Millimeters Min. Nom. Max. 3.55 4.20 4.85 1.14 1.46 1.78 0.51 0.83 1.14 0.31 0.72 1.14 14.20 15.35 16.50 9.70 10.20 10.70 2.29 2.54 2.79 4.83 5.08 5.33 0.51 0.95 1.40 5.84 6.35 6.86 2.03 2.48 2.92 12.72 13.72 14.72 3.66 5.00 6.35 3.53 3.81 4.09 2.54 2.98 3.43
Dimensions In Inches Min. Nom. Max. 0.140 0.165 0.191 0.045 0.057 0.070 0.020 0.033 0.045 0.012 0.028 0.045 0.559 0.604 0.650 0.382 0.402 0.421 0.090 0.100 0.110 0.190 0.200 0.210 0.020 0.037 0.055 0.230 0.250 0.270 0.080 0.098 0.115 0.501 0.540 0.580 0.144 0.197 0.250 0.139 0.150 0.161 0.100 0.117 0.135
Anachip Corp. www.anachip.com.tw 9/9
SEATING PLANE
Rev.1.3 Jun. 8, 2005

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