Dropout Positive Adjustable Fixed-Mode Regulator Features AP1084
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AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Features
AP1084 dropout positive adjustable fixedmode regulator with minimum 5.0A output current capability. product specifically designed provide well-regulated supply voltage applications such high-speed termination current 3.3V logic supply. AP1084 also well suited other applications such cards. AP1084 guaranteed have lower than 1.4V dropout full load current making ideal provide well-regulated outputs 1.25 3.3V with input supply.
1.4V maximum dropout full load current Built-in thermal shutdown Output current limiting Adjustable output voltage fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V Fast transient response Good noise rejection Package: TO252, TO263, TO220, PDIP-8
Ordering Information
AP1084
Dropout Regulator
Package TO252-3L TO263-3L TO220-3L PDIP-8L
Vout Blank 1.5V 1.8V 2.5V 3.3V 5.0V
Lead Free
Packing
Blank Normal Blank Tube Lead Free Package Taping
Block Diagram
Vout
1.25V CURRENT LIMIT Thermal Shutdown
This datasheet contains product information. Anachip Corp. reserves rights modify product specification without notice. liability assumed result this product. rights under patent accompany sale product.
Rev.1.2 Jun.9, 2005 1/11
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Connection Diagram
TO263 FRONT VIEW Vout TO220 FRONT VIEW Vout Vout (GND) Adj(GND) Vout Vout AP1084 Vout (GND) TO252 FRONT VIEW Vout PDIP-8 VIEW Vout Vout Vout Vout Vout (GND)
Descriptions
Name (GND) Vout TO263/ PDIP-8 252/220 2/3/5/6/ Function Adjustable (Ground only fixed mode) resistor divider from this Vout ground sets output voltage. (Ground only Fixed-Mode) output regulator. minimum 10uF (0.15 capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor (0.15 connected from this ground insure that input voltage does below minimum dropout voltage during load transient response. This must always 1.4V (1.3V) higher than Vout order device regulate properly.
Anachip Corp. www.anachip.com.tw 2/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Absolute Maximum Ratings
Symbol Parameter Supply Voltage Power Dissipation Storage Temperature Operating Junction Temperature Range Rating Unit -0.3 Internally Limited +150 +150
Electrical Characteristics
Sym.
VREF
(Under Operating Conditions) Min.
1.225 1.470 1.764 2.450 3.235 4.900
Parameter
Conditions (Notes)
Io=10mA, Tj=25 (Vin-Vout)=1.5V IO=10mA, VOUT+1.5V<VIN<12V, =25oC IOUT 10mA, 25oC, 3VVIN12V IOUT 10mA, 25oC, 3.3VVIN12V IOUT 10mA, 25oC, 4VVIN12V IOUT 10mA, 25oC, 4.8VVIN12V IOUT 10mA, 25oC, 6.5VVIN12V VIN=3.3V, 0mA<Io<5A, =25oC (Note 1,2) VIN=3V, 0mA<Io<5A, =25oC (Note 1,2) VIN=3.3V, 0mA<Io<5A =25oC (Note 1,2) VIN=4V, 0mA<Io<5A =25oC (Note 1,2) 0mA<Io<5A TJ=25oC (Note 1,2) 0mA<Io<5A, TJ=25oC (Note 1,2) Io=5.0A (Vout Vout) Vin-Vout=5V
Typ.
1.250 1.500 1.800 2.500 3.300 5.000
Max.
1.275 1.530 1.836 2.550 3.365 5.100
Unit
Reference Voltage AP1084-XXX AP1084-1.5 AP1084-1.8 Line Regulation AP1084-2.5 AP1084-3.3 AP1084-5.0 AP1084-Adj AP1084-1.5 Load AP1084-1.8 Regulation AP1084-2.5 AP1084-3.3 AP1084-5.0 Dropout Voltage Current Limit Minimum Load Current Temperature Stability Thermal Resistance Junction-to-Ambient heat sink flow) Thermal Resistance Junction-to-Ambient
Io=10mA TO-252 TO-263 TO-220
0.65/2.7 0.65/2.7
PDIP-8: Control Circuitry/Power Transistor (Note TO-252: Control Circuitry/Power Transistor Thermal Resistance TO-263: Control Circuitry/Power Transistor Junction-to-Case TO-220: Control Circuitry/Power Transistor
Note thermal regulation specifications changes output voltage heating effects. Line load regulation measured constant junction temperature duty cycle pulse testing. Load regulation measured output lead 1/18" from package. Note Line load regulation guaranteed maximum power dissipation 15W. Power dissipation determined difference between input output output current. Guaranteed maximum power dissipation will available over full input/output range. Note Output connected cupper area 5.5mm*5.5mm separately. need large lower please connect large cupper area 5.5mm*5.5mm (like 10mm*10mm).
Anachip Corp. www.anachip.com.tw 3/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Typical Circuit
TO263/252/220
5.0V 3.3V Fixed Mode Regulator
100uF Vout Vout 3.3V/5A 100uF Vout Vout 100uF 2.5V/5A
Adjustable Regulator
100uF
Note: VREF
PDIP-8
5V/3.3V fixed output
100uF Vout 3.3V/1A 100uF Vout 2.5V/1A 100uF
5V/2.5V output
100uF
Vout Vout Vout Vout Vout Vout
Vout Vout Vout Vout Vout Vout
Note: VREF
Anachip Corp. www.anachip.com.tw 4/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Functional Description
Introduction AP1084 adjustable Dropout (LDO) regulator terminal device that easily programmed with addition external resistors voltages within range 1.25V Vin-1.4V. AP1084 only needs 1.4V differential between Vout maintain output regulation. addition, output voltage tolerances also extremely tight they include transient response part specification. example, Intel specification calls total 100mV including initial tolerance, load regulation 5.0A load step. AP1084 specifically designed meet fast current transient needs well providing accurate initial voltage, reducing overall system cost with need fewer output capacitors. Output Voltage Setting AP1084 programmed voltages range 1.25V Vin-1.4V with addition external resistors according following formula:
Vout Vref R2/R1) +Iadj where Vref 1.25 typically, Iadj 55uA typically R1&R2 shown below AP1084 Vout Vref
Iadj=55uA
AP1084 keeps constant 1.25V between output adjust pin. placing resistor across these pins constant current flows through adding Iadj current into resistor producing voltage equal (1.25/R1)*R2+Iadj*R2 which will added 1.25V output voltage. This summarized above equation. Since minimum load current requirement AP1084 10mA, typically selected resistor that automatically satisfies minimum current requirement. Notice that since Iadj typically range 55uA only adds small error output voltage should only considered when very precise output voltage setting required. example, typical 3.3V application where R1=121 R2=200 error Iadj only 0.3% nominal point. Load Regulation Since AP1084 only terminal device, possible provide true remote sensing output voltage load. best load regulation achieved when bottom side connected load top-side resistor connected directly case Vout regulator load. important note that high current applications, this re-present significant percentage overall load regulation must
keep path from regulator load short possible minimize this effect. Stability AP1084 requires output capacitor part frequency compensation order make regulator stable. most applications minimum 10uF aluminum electrolytic capacitor insures both stability good transient response. Thermal Design AP1084 incorporates internal thermal shutdown that protects device when junction temperature exceeds maximum allowable junction temperature. Although this device operate with junction temperatures range 150oC, recommended that selected heat sink chosen such that during maximum continuous load operation junction temperature kept below temperature. Layout Consideration output capacitors must located close Vout terminal device possible. recommended section layer board plane connect Vout output capacitors prevent high frequency oscillation that result excessive trace inductance.
Anachip Corp. www.anachip.com.tw 5/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Performance Characteristics
0.20
Output Voltage Deviation
load=1.5A
Dropout Voltage
-0.20
-0.40
-0.80
Dropout Voltage Output Current
Output Current
Load Regulation Temperature
Temperature
Output Voltage Change
-0.5 -1.5
Output Voltage Deviation
Percent Change Output Voltage Temperature
Output Voltage Deviation (mV) Input Voltage Load Current Output Voltage Deviation (mV) Cin=1uF Cout=10uF Tantalum
Temperature
Line Regulation
Cin=1uF Cout=10uF Tantalum Preload=100mA
Input Voltage
TIME (us)
Line Transient Response
Load Transient Response
TIME (us)
Anachip Corp. www.anachip.com.tw 6/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Marking Information
View)
Logo Part Number 1084 84-VV 1.5V 1.8V 2.5V 3.3V
84-VV YYWWX
Blank: normal Lead Free Package
Year week Internal code Optional)
(TO252-3L)
View) Logo
Part Number 1.5V 1.8V 2.5V 3.3V Blank
1084-VV YYWWX
Blank: normal Lead Free Package
Year week Internal code Optional)
(TO220-3L TO263-3L)
View Logo Part Number 1.5V 1.8V 2.5V 3.3V Blank
1084-VV
Blank: normal Lead Free Package code: internal week: 01~52 Year: "01" =2001 "02" =2002
(PDIP-8L)
Anachip Corp. www.anachip.com.tw 7/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator Package Dimension
TO263-3L
10.9
2.54
Land Pattern Recommendation (Unit:
Symbol
Dimensions 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 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 8/11
Rev.1.2
15.7
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator
TO252-3L
11.0
2.25
NOTE2 SEATING PLANE
Land Pattern Recommendation (Unit:
Notes:
JEDEC Outline: TO-252 Mils suggested positive contact mounting.
Symbol
Dimensions 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 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 9/11
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator
TO220-3L
Symbol
Dimensions 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 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 10/11
SEATING PLANE
Rev.1.2
Jun.9, 2005
AP1084
Dropout Positive Adjustable Fixed-Mode Regulator
PDIP-8L
E-PIN O0.118 inch
(4X)
INDENT O0.025 DEEP 0.006-0.008 inch (4X)
Symbol
Dimensions millimeters Min. Nom. Max. 5.33 0.38 3.30 0.36 0.46 0.56 1.52 1.65 0.81 0.99 1.14 0.20 0.25 0.36 9.02 9.27 9.53 7.62 7.94 8.26 6.15 6.35 6.55 2.54 2.92 3.81 8.38 8.89 9.70 0.71 0.84 0.97
Dimensions inches Min. Nom. Max. 0.210 0.015 0.122 0.130 0.138 0.014 0.018 0.022 0.055 0.060 0.065 0.032 0.039 0.045 0.008 0.010 0.014 0.355 0.365 0.375 0.300 0.313 0.325 0.242 0.250 0.258 0.100 0.115 0.130 0.150 0.330 0.350 0.382 0.028 0.033 0.038
Anachip Corp. www.anachip.com.tw 11/11
Rev.1.2
Jun.9, 2005
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