APL1087R
800mA Low Dropout Fast Response Positive Adjustable Regulator and Fixed 1.8V, 2.5V and 3.3V
Features
•Guaranteed Output Voltage Accuracy within 2%
•Fast Transient Response
•Guaranteed Dropout Voltage at Multiple Currents
•Load Regulation : 0.6% Typ.
•Line Regulation : 0.03% Typ.
•Low Dropout Voltage : 1.3V Typ. at IOUT =500mA
•Current Limit : 0.8A Min. at TJ=125°C
•On-Chip Thermal Limiting : 150 °C Typ.
•Adjustable Output : 1.25~7.15V
•Standard 3-pin SOT-89 and TO-92 Power Packages.
General Description
The APL1087R is a low dropout three-terminal adjustable regulators with 0.8A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications , the APL1087R has been optimized.
The device is available in an adjustable version and fixed output voltages of 1.8V, 2.5V and 3.3V, the output available voltage range is from 1.25~7.15V with an input supply below 9V. Dropout voltage is guaranteed at a maximum of 1.45V at 0.5A.
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 APL1087R is available in the industry standard 3-pin SOT-89 and TO-92 power packages.
Applications |
Pin Description |
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VIN |
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Voltage Regulator for CD-ROM Drivers |
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Voltage Regulator for LAN Cards |
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APL1087R |
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• Voltage Regulator for mother Boards |
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Wireless Communication Systems |
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Portable Instrument |
AD J/G ND |
VIN |
VO U T |
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Portable Consumer Equipment |
SOT-89 (Front View) |
•Low Voltage Systems
VOUT
VIN
ADJ/GND
TO-92 (Top View)
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. A.2 - Apr., 2003 |
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APL1087R
Ordering and Marking Information
A P L 1 0 8 7 R - |
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P a c k a g e C o d e |
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D : S O T -8 9 |
E : T O -9 2 |
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H a n d lin g C o d e |
T e m p . R a n g e |
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C : 0 to 7 0 ° C |
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T e m p . R a n g e |
H a n d lin g C o d e |
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T U : T u b e |
T R : T a p e & R e e l |
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P a c k a g e C o d e |
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V o lta g e C o d e |
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V o lta g e C o d e |
1 8 : 1 .8 V |
2 5 : 2 .5 V |
3 3 : 3 .3 V |
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B la n k : A d ju s ta b le V e rs io n |
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A P L 1 0 8 7 R D /E : |
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A P L 1 0 8 7 R |
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X X X X X - D a te C o d e |
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X X X X X |
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A P L 1 0 8 7 R -1 8 D /E : |
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A P L 1 0 8 7 R |
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X X X X X - D a te C o d e |
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X X X X X 1 8 |
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A P L 1 0 8 7 R -2 5 D /E : |
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A P L 1 0 8 7 R |
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X X X X X - D a te C o d e |
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X X X X X 2 5 |
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A P L 1 0 8 7 R -3 3 D /E : |
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A P L 1 0 8 7 R |
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X X X X X - D a te C o d e |
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X X X X X 3 3 |
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Absolute Maximum Ratings
Symbol |
Parameter |
Rating |
Unit |
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VI |
Input Voltage |
9 |
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 |
θJA |
Thermal Resistance from Junction to Ambient in Free Air |
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SOT-89 |
180 |
C/W |
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TO-92 |
180 |
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Copyright ANPEC Electronics Corp. |
2 |
www.anpec.com.tw |
Rev. A.2 - Apr., 2003 |
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APL1087R
Electrical Characteristics
Symbol |
Parameter |
Test Conditions |
APL1087R |
Unit |
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Min. |
Typ. |
Max. |
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VREF |
Reference |
10mA≤ IOUT ≤0.5A, 3.1V≤VIN≤9V, |
1.225 |
1.250 |
1.275 |
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Voltage |
TJ =0~125°C |
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Output Voltage |
TJ =0~125°C, |
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APL1087R-18 |
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0≤ IOUT≤ 0.5A, 3.25V≤VIN≤9V, |
1.764 |
1.800 |
1.836 |
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VOUT |
APL1087R-25 |
TJ =0~125°C, |
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2.450 |
2.500 |
2.550 |
V |
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0≤ IOUT≤ 0.5A, 3.95V≤VIN≤9V, |
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APL1087R-33 |
TJ =0~125°C, |
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3.235 |
3.300 |
3.365 |
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0≤ IOUT≤ 0.5A, 4.75V≤VIN≤9V, |
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Line Regulation |
TJ =0~125°C |
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APL1087R |
IOUT=10mA, 3.1V≤VIN ≤9V, (note1) |
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0.03 |
0.2 |
% |
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REGLINE |
APL1087R-18 |
IOUT=0mA, 3.25V≤VIN≤9V, (note1) |
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6 |
mV |
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APL1087R-25 |
IOUT=0A, 3.95V≤VIN≤9V, (note 1) |
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1 |
6 |
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APL1087R-33 |
IOUT=0A, 4.75V≤VIN ≤ 9V, (note 1) |
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6 |
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Load Regulation |
TJ =0~125°C |
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APL1087R |
(VIN –VOUT)=3V, 0≤ IOUT ≤0.5A ,(note 1) |
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REGLOAD |
APL1087R-18 |
VIN=3.25V, 0≤ IOUT ≤0.5A ,(note 1) |
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0.4 |
0.6 |
% |
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APL1087R-25 |
VIN=3.95V, 0≤ IOUT ≤0.5A ,(note 1) |
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APL1087R-33 |
VIN=4.75V, 0≤ IOUT ≤0.5A ,(note 1) |
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VD |
Dropout Voltage |
IOUT=0.5A ,TJ =0~125°C |
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1.3 |
1.45 |
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ILIMIT |
Current Limit |
(VIN -VOUT)=5V, TJ=25°C |
800 |
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IADJ |
Adjust Pin Current |
(VIN -VOUT)=3V, IOUT=10mA, TJ=0~125°C |
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60 |
120 |
A |
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∆IADJ |
Adjust Pin Current |
TJ=0~125°C, 10mA≤ IOUT ≤0.5A, |
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0.2 |
5 |
A |
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Change |
1.45V≤VIN -VOUT≤7.55V |
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IO |
Minimum Load |
TJ=0~125°C, VIN =9V, (note 3) |
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1.7 |
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mA |
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Current |
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PSRR |
Ripple Rejection |
FRIPPLE=120Hz, VRIPPLE=1VP-P, |
60 |
75 |
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(VIN -VOUT)=3V, TJ=0~125°C |
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TR |
Thermal |
TJ=25°C, 30ms Pulse |
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0.01 |
0.02 |
%/ W |
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Regulation |
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TS |
Temperature |
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0.5 |
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% |
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Stability |
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LS |
Long -Term |
TJ =125°C,1000Hrs. |
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0.3 |
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% |
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Stability |
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VN |
RMS Output |
TJ=25°C,10Hz≤F≤10kHz, (% of VOUT) |
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0.003 |
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Noise |
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OT |
Over Temperature |
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150 |
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°C |
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Point |
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Quiescent Current |
TJ=0~125°C, |
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APL1087R-18 |
VIN≤9V |
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5.5 |
10 |
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APL1087R-25 |
VIN≤9V |
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5.5 |
10 |
mA |
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APL1087R-33 |
VIN≤9V |
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5.5 |
10 |
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Copyright ANPEC Electronics Corp. |
3 |
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www.anpec.com.tw |
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Rev. A.2 - Apr., 2003 |
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APL1087R
Electrical Characteristics (Cont.)
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are measured at a constant junction temperature by low duty cycle pulse testing.
Note 2: Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/ output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve. Note 3: Minimum load current is defined as the minimum output current required to maintain regulation.
Application Circuits
1.25V to 7.15V Adjustable Regulator
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AP L1087R |
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VIN |
IN |
OUT |
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V |
O U T |
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R1 |
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ADJ |
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121Ω |
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1 0 µ F |
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1 0 0 µ F |
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C* |
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C1 |
R2 |
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2 |
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* Needed if device is far from filter capacitors
VOUT = 1.250V× R1+ R2 R1
5V Regulator with Shutdown
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APL1087R |
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VIN |
IN |
OUT |
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5V |
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ADJ |
121Ω |
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1% |
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1 0 µ F |
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+ |
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1k |
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F |
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TTL |
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365 |
1 0 0 µ |
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Ω |
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1k |
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1% |
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Improving Ripple Rejection
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APL1087R |
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VIN |
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IN |
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OUT |
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V |
OUT |
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+ |
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ADJ |
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1 0 F |
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R1 |
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150 F |
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R2 |
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C*3 |
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1 0 F |
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*C3 improves ripple rejection. XC should be approximately equal to R1 at ripple frequency
Copyright ANPEC Electronics Corp. |
4 |
www.anpec.com.tw |
Rev. A.2 - Apr., 2003 |
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