APL1085
3A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V
Features
•Fast Transient Response
•Guaranteed Dropout Voltage at Multiple Currents
•Load Regulation : 0.05% Typ.
•Line Regulation : 0.03% Typ.
•Low Dropout Voltage : 1.2V Typ. at IOUT =3A
•Trimmed Current Limit : 3A Typ. at TJ=125 ° C
•On-Chip Thermal Limiting : 150 ° C Typ.
•Standard 3-pin TO-220 , TO-252 and TO-263 Power Package
Applications
•PentiumTM Processor Supplies
•PowerPCTM Supplies
•Low Voltage Logic Supplies
•Battery-Powered Circuitry
•Post Regulator for Switching Power Supply
General Description
The APL1085 is a low dropout three-terminal adjustable regulator with 3A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications, the APL1085 has been optimized. The output available voltage range of adjustable version is from 1.25~5.75V with an input supply below 7V , and the fixed 3.3V output voltage device is also available.
Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures.
The APL1085 is available in both the through-hole and surface mount versions of the industry standard
Pin Description
TAB is VOUT |
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3 |
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VIN |
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2 |
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VOUT |
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1 |
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ADJ |
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Front View APL1085 TO-220 Package |
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3 |
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VIN |
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TAB is VOUT |
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VO UT |
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1 |
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AD J |
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Front View APL1085 TO-252 Package |
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VIN |
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3 |
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TAB is V |
OUT |
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VO UT |
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1 |
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ADJ |
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Front View APL1085 TO-263 Package
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp. |
1 |
www.anpec.com.tw |
Rev. B.5 - Jun., 2003 |
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APL1085
Ordering Information
APL1085- |
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Package Code |
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F : TO-220 |
G : TO-263 |
U : TO-252 |
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Handling Code |
Temp. Range |
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C : 0 to 70° C |
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Temp. Range |
Handling Code |
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TU : Tube |
TR : Tape & Reel |
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Package Code |
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Voltage Code : |
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Voltage Code |
33 : 3.3V |
Blank : Adjustable Version |
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APL1085: |
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XXXXX - Date Code |
APL1085-33 : |
33 |
XXXXX |
- Date Code |
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APL1085 |
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APL1085 |
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XXXXX |
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XXXXX |
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Absolute Maximum Ratings
Symbol |
Parameter |
Rating |
Unit |
VI |
Input Voltage |
7 |
V |
TJ |
Operating Junction Temperature Range |
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° C |
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Control Section |
0 to 125 |
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Power Transistor |
0 to 150 |
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TSTG |
Storage Temperature Range |
-65 to +150 |
° C |
TL |
Lead Temperature (Soldering, 10 second) |
260 |
° C |
Electrical Characteristics
Symbol |
Parameter |
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Test Conditions |
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APL1085 |
Unit |
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Min. |
Typ. |
Max. |
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VREF |
Reference Voltage |
1.5V≤ (VIN -VOUT) ≤ 5.75V, |
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1.225(-2%) |
1.250 |
1.275(+2%) |
V |
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10mA≤ |
IOUT ≤ |
3A, TJ =0~125° C |
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VOUT |
Output Voltage |
10mA≤ |
IOUT ≤ |
3A, 4.75V≤ VIN ≤ 7V, |
3.235(-2%) |
3.300 |
3.365(+2%) |
V |
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APL1085-3.3 |
TJ =0~125° C |
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REGLINE |
Line Regulation |
TJ =0~125° C, (Notes 1) |
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0.03 |
0.2 |
% |
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APL1085 |
2.75V≤ VIN ≤ 7V, IOUT=10mA, |
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APL1085-3.3 |
4.75V≤ VIN ≤ 7V, IOUT=0mA , |
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REGLOAD |
Load Regulation |
TJ=25° C, (Notes 1) |
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% |
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APL1085 |
(VIN -VOUT)=3V, 10mA≤ IOUT ≤ |
3A |
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0.05 |
0.3 |
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APL1085-3.3 |
VI N=5V, 0mA≤ IOUT ≤ |
3A |
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0.05 |
0.5 |
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VD |
Dropout Voltage |
∆ VREF=1% ,IOUT=3A ,TJ =0~125° C |
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1.3 |
1.4 |
V |
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ILIMIT |
Current Limit |
(VIN -VOUT)=1.7V, |
TJ= |
25° C |
4.5 |
6.0 |
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TJ= |
125° C |
3.5 |
5.0 |
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(VIN -VOUT)=3V, |
TJ= |
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25° C |
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A |
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5.0 |
6.5 |
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TJ= |
125° C |
4.0 |
5.5 |
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IADJ |
Adjust Pin Current |
(VIN -VOUT)=3V, IOUT=10mA, |
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60 |
120 |
A |
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TJ=0 125° C |
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Copyright |
ANPEC Electronics Corp. |
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2 |
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www.anpec.com.tw |
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Rev. B.5 - Jun, 2003 |
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APL1085
Electrical Characteristics Cont.
Symbol |
Parameter |
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Test Conditions |
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APL1085 |
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Unit |
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Min. |
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Typ. |
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Max. |
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∆ IADJ |
Adjust Pin Current |
1.5V≤ ( VIN -VOUT)≤ 5.75V, |
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0.2 |
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5 |
µ A |
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Change |
APL1085 |
10mA≤ IOUT≤ 3A |
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ILMIN |
Minimum Load |
1.5V≤ ( VIN -VOUT)≤ 5.75V, |
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2 |
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10 |
mA |
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Current |
APL1085 |
TJ=0 125° C |
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IQ |
Quiescent Current |
VI N=5V |
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8 |
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13 |
mA |
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APL1085-3.3 |
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PSRR |
Ripple Rejection |
F=120Hz, Cout=22µ F, Tant. , |
60 |
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dB |
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(VIN -VOUT)=3V, IOUT=3A |
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LS |
Long -Term |
TJ = |
125° C,1000Hrs. |
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0.03 |
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1.0 |
% |
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Stability |
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VN |
RMS Output |
TJ= |
25° C,10Hz? F? 10kHz |
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0.003 |
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% |
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Noise(% of VOUT) |
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θ JC |
Thermal |
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Control Circuitry/Power |
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0.7/3.0 |
° C/ |
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Resistance |
Transistor |
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W |
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Junction to Case |
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NOTE 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulations are measured at a constant junction temperature by low duty cycle pulse testing.
Application Circuits
Typical Regulator
VIN (2.75V~7V) |
APL1085 |
VOUT (1.250V/ 3A) |
10 F + |
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C1 |
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Solid Tantalum |
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C2* |
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5V to 3.3V Regulator
VIN |
(5V) |
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+ |
APL1085 |
+ |
VOUT (3.3V/ 3A) |
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10 |
F |
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Solid Tantalum |
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R1 |
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C1 |
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C2* |
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R2 |
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*Required for stability |
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R1/(R1+R2)=1.250V/3.3V |
APL1085:C2=10µ F
* R1 is typically in range of 100Ω to 120Ω
Copyright ANPEC Electronics Corp. |
3 |
www.anpec.com.tw |
Rev. B.5 - Jun, 2003 |
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APL1085
Typical Characteristics
Dropout Voltage vs Output Current
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1.5 |
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1.4 |
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(V) |
1.3 |
TJ= -50° C |
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1.2 |
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Voltage |
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1.1 |
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1.0 |
TJ= 25° C |
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Dropout |
0.9 |
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0.8 |
TJ=125° C |
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TJ=0° C |
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0.7 |
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0.6 |
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0.50 |
0.5 |
1 |
1.5 |
2 |
2.5 |
3 |
Output Current (A)
Short-Circuit Current vs Temperature
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14 |
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(A) |
13 |
VIN-VOUT (SHORT CIRCUIT) =5V |
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12 |
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Current |
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11 |
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10 |
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Circuit |
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8 |
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- |
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Shout |
7 |
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6 |
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5 |
VIN-VOUT(SHORT CIRCUIT) =3.3V |
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4 |
0 |
50 |
100 |
150 |
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-50 |
Temperature (° C)
Load Regulation vs Temperature |
Reference Voltage vs Temperature |
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0.10 |
∆ |
I =3A |
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1.275 |
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1.270 |
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(%) |
0.05 |
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1.265 |
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Output Voltage Deviation |
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Reference Voltage (V) |
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0.0 |
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1.260 |
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1.255 |
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-0.05 |
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1.250 |
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1.245 |
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-0.10 |
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1.240 |
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-0.15 |
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1.235 |
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1.230 |
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-0.20 |
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0 |
50 |
100 |
150 |
1.225 |
0 |
50 |
100 |
150 |
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-50 |
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-50 |
Temperature (° C) |
Temperature (° C) |
Copyright ANPEC Electronics Corp. |
4 |
www.anpec.com.tw |
Rev. B.5 - Jun, 2003 |
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