APL1541
1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V
Features
•Guaranteed Output Voltage Accuracy within 2%
•Fast Transient Response
•Guaranteed Dropout Voltage at Multiple Currents
•Load Regulation : 0.1% Typ.
•Line Regulation : 0.03% Typ.
•Low Dropout Voltage : 1.1V Typ. at IOUT =1A
•Current Limit : 1A Typ. at TJ=125 ° C
•On-Chip Thermal Limiting : 150 ° C Typ.
•Adjustable Output : 1.25~7.75V
•Standard 8-pin SO Power Package
General Description
The APL1541 is a low dropout three-terminal adjustable regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications , the APL1541 has been optimized.
The device is available in an adjustable version and fixed output voltages of 3.3V, the output available voltage range is from 1.25~7.75V with an input supply below 12V. Dropout voltage is guaranteed at a maximum of 1.3V at 1A.
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 APL1541 is available in the industry standard 8- pin SO power package which can be used in applications where space is limited.
Applications
• |
Peripheral Cards |
Pin Description |
|
|
|
|||
• |
Active SCSI Terminators |
|
|
|
|
|
|
|
• Low Voltage Logic Supplies |
|
|
|
|
|
|
VOUT |
|
NC |
|
|
1 |
8 |
|
|||
|
|
|
||||||
• |
|
|
|
|
||||
Post Regulator for Switching Power Supply |
ADJ/GND |
|
|
2 |
7 |
|
VOUT |
|
|
|
|
|
|
||||
|
|
|
|
|
||||
|
|
|
|
|
APL1541-33 |
|
|
|
|
|
VIN |
|
|
3 |
6 |
|
VOUT |
|
|
|
|
|
||||
|
|
NC |
|
|
4 |
5 |
|
VOUT |
|
|
|
|
|
||||
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Front View for SO - 8 |
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 - Oct., 2003 |
|
|
APL1541
Ordering and Marking Information
APL1541- |
|
|
|
|
|
|
|
|
|
|
|
|
Package Code |
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
K : SOP-8 |
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Tem p. Range |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Lead Free Code |
C : 0 to 70 ° C |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Handling Code |
Handling Code |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
TU : Tube |
|
TR : Tape & Reel |
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Tem p. Range |
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Voltage Code |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Package Code |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
33: 3.3V |
|
Blank : Adjustable Version |
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Voltage Code |
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Lead Free Code |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
L : Lead Free Device |
Blank : Orginal Device |
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
APL1541- |
APL1541 |
|
|
|
|
XXXXX - Date Code |
APL154133 : |
APL1541 |
XXXXX - Date Code |
||||||||||||||
XXXXX |
|
|
|
|
XXXXX33 |
||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Absolute Maximum Ratings
Symbol |
Parameter |
Rating |
Unit |
|
|
|
|
VI |
Input Voltage |
13.2 |
V |
TJ |
Operating Junction Temperature Range |
|
° C |
|
Control Section |
0 to 125 |
|
|
Power Transistor |
0 to 150 |
|
|
|
|
|
TSTG |
Storage Temperature Range |
-65 to +150 |
° C |
TL |
Lead Temperature (Soldering, 10 second) |
260 |
° C |
Electrical Characteristics
Symbol |
Parameter |
Test Conditions |
|
APL1541 |
|
Unit |
||
Min. |
|
Typ. |
|
Max. |
||||
|
|
|
|
|
|
|||
VREF |
Reference Voltage |
10mA≤ IOUT ≤ 1A, 1.4V≤ (VIN -VOUT) ≤ 9.75V, |
1.225 |
|
1.250 |
|
1.275 |
V |
APL1541 |
TJ =0~125° C |
|
|
|||||
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
Output Voltage |
TJ =0~125° C, |
|
|
|
|
|
|
VOUT |
APL1541-33 |
0≤ IOUT≤ 1A, 4.75V≤ VIN≤ 12V, |
3.235 |
|
3.300 |
|
3.365 |
V |
|
|
|
|
|
|
|
|
|
|
Line Regulation |
TJ =0~125° C |
|
|
|
|
|
|
REGLINE |
APL1541 |
IOUT=10mA, 1.5V≤ (VIN -VOUT) ≤ 9.75V, (note1) |
|
|
0.03 |
|
0.2 |
% |
|
APL1541-33 |
IOUT=0A, 4.75V≤ (VIN -VOUT) ≤ 7.75V, (note 1) |
|
|
1 |
|
6 |
mV |
|
Load Regulation |
TJ =0~125° C |
|
|
|
|
|
|
REGLOAD |
APL1541 |
(VIN -VOUT)=3V, 0≤ IOUT ≤ 1A ,(note 1) |
|
|
0.1 |
|
0.4 |
% |
|
APL1541-33 |
VIN=4.75V, 0≤ IOUT ≤ 1A ,(note 1) |
|
|
1 |
|
10 |
mV |
|
Dropout Voltage |
IOUT=100mA ,TJ =0~125° C |
|
|
1 |
|
1.1 |
|
VD |
|
IOUT=500mA ,TJ =0~125° C |
|
|
1.05 |
|
1.2 |
V |
|
|
IOUT=1A ,TJ =0~125° C |
|
|
1.1 |
|
1.3 |
|
Copyright ANPEC Electronics Corp. |
2 |
www.anpec.com.tw |
Rev. A.2 - Oct., 2003 |
|
|
APL1541
Electrical Characteristics Cont.
Symbol |
Parameter |
|
|
Test Conditions |
|
APL1541 |
|
Unit |
|||||
|
|
|
|
|
|
|
|||||||
|
|
Min. |
|
Typ. |
|
Max. |
|||||||
|
|
|
|
|
|
|
|
|
|
|
|||
ILIMIT |
Current Limit |
(VIN -VOUT)=5V, TJ=25° C |
1 |
|
|
|
|
A |
|||||
IADJ |
Adjust Pin Current |
(VIN -VOUT)=3V, IOUT=10mA, TJ=0~125° C |
|
|
60 |
|
120 |
µ A |
|||||
APL1541 |
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Adjust Pin Current |
TJ= 0~125° C, 10mA≤ IOUT ≤ 1A, |
|
|
0.2 |
|
5 |
|
|||||
∆ IADJ |
Change |
1.4V (V |
-V |
OUT |
) |
≤ |
9.75V |
|
|
|
|
|
µ A |
|
APL1541 |
≤ |
IN |
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Minimum Load |
|
|
|
|
|
|
|
|
|
|
|
|
IO |
Current |
TJ=0~125° C, (VIN -VOUT)=9.75V, (note 3) |
|
|
1.7 |
|
|
mA |
|||||
|
APL1541 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
PSRR |
Ripple Rejection |
FRIPPLE=120Hz, VRIPPLE=1VP-P, |
60 |
|
75 |
|
|
dB |
|||||
|
(VIN -VOUT)=3V, TJ=0~125° C |
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
||||||
TR |
Thermal |
TJ=25° C, 30ms Pulse |
|
|
0.01 |
|
0.02 |
%/ W |
|||||
Regulation |
|
|
|
||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
TS |
Temperature |
|
|
|
|
|
|
|
|
0.5 |
|
|
% |
Stability |
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
LS |
Long -Term |
TJ =125° C,1000Hrs. |
|
|
0.3 |
|
|
% |
|||||
Stability |
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
VN |
RMS Output |
TJ=25° C,10Hz≤ |
F≤ 10kHz, |
|
|
0.003 |
|
|
% |
||||
Noise |
(% of VOUT) |
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|||
θ th |
Thermal |
Junction to Case, at Tab |
|
|
15 |
|
|
° C/ W |
|||||
Resistance |
Junction to ambient |
|
|
50 |
|
|
|||||||
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
||
Iq |
Quiescent Current |
TJ=0~125° C, |
|
|
|
|
|
|
|
|
mA |
||
APL1541-33 |
VIN≤ 12V |
|
|
|
|
|
|
|
5.5 |
|
10 |
||
|
|
|
|
|
|
|
|
|
|
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.
Copyright ANPEC Electronics Corp. |
3 |
www.anpec.com.tw |
Rev. A.2 - Oct., 2003 |
|
|
APL1541
Application Circuits
Simple 5V to 3.3V Regulation
|
|
|
|
|
|
A P L1541-33 |
|
|
|
|
|
|||
V IN =5V |
|
|
|
|
IN |
|
|
|
O UT |
|
|
|
|
V O U T=3.3V |
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
G ND |
|
|
|
|
|
|||
10uF |
|
|
|
|
|
|
|
|
|
|
|
10uF |
||
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Improving Ripple Rejection
|
|
|
|
|
|
A P L1541 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
V IN |
|
|
|
|
IN |
O UT |
|
|
|
|
|
|
|
|
|
|
|
|
|
V O U T |
||
|
|
|
|
|
|
|
|
|
|
|
|
R1 |
||||||||||
10uF |
|
|
|
|
A DJ |
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
121Ω |
|
|
|
||||||||
|
|
|
|
|
|
|
R2 |
|
||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
150uF |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
C1 |
|
|
|
||||||
|
|
|
|
|
|
365 |
Ω |
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
10uF |
|
|
|
|||||||
|
|
|
|
|
|
1% |
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
*C1 improves ripple rejection.XC should be approximately equal to R1 at ripple frequency
1.25V to 7.75V Adjustable Regulator
|
|
|
A P L 1 5 4 1 |
|
|
V IN |
|
IN |
O U T |
|
V O U T |
|
|
||||
|
|
|
A D J |
R 1 |
|
|
|
|
1 2 1 Ω |
||
1 0 u F |
|
|
|||
|
|
|
1 0 0 u F |
||
C 1 * |
|
|
|
||
|
|
|
C 2 * |
||
|
|
|
|
|
|
|
|
|
R 2 |
|
|
|
|
|
1 K |
|
|
*Needed if device is far from filter capacitors
|
|
|
|
VOUT = 1.250V x |
R1+R2 |
|
|
|||||||
|
|
|
|
|
|
|
|
R1 |
|
|
||||
|
|
|
5V Regulator with Shutdown |
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
A P L 1 5 4 1 |
|
|
|
|
|
|
|
|
V IN |
|
|
|
|
IN |
O U T |
|
|
|
|
|
|
5 V |
|
|
|
|
|
|
|
1 2 1 Ω |
|
|||||||
|
|
|
|
|
|
A D J |
|
|
|
|
|
|
||
|
|
|
|
|
|
|
1 % |
|
|
|
|
|||
|
|
|
|
1 0 u F |
|
|
|
|
|
1 0 0 u F |
||||
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
1 K |
|
|
|
|
3 6 5 Ω |
|
|
|||
T T L |
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
1 % |
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
1 K |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Copyright ANPEC Electronics Corp. |
4 |
www.anpec.com.tw |
Rev. A.2 - Oct., 2003 |
|
|