ANPEC APL1541-KC-TU, APL1541-KC-TRL, APL1541-KC-TR, APL1541-33KC-TUL, APL1541-33KC-TU Datasheet
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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 Cur-
••
rents
••
•
Load Regulation : 0.1% Typ.
••
••
•
Line Regulation : 0.03% Typ.
••
••
• Low Dropout Voltage : 1.1V Typ. at I
••
••
• Current Limit : 1A Typ. at T
••
••
• On-Chip Thermal Limiting : 150 °C Typ.
••
••
• Adjustable Output : 1.25~7.75V
••
••
• Standard 8-pin SO Power Package
••
=125 °C
J
OUT
=1A
Applications
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 8pin SO power package which can be used in applications where space is limited.
••
• Peripheral Cards
••
••
• Active SCSI Terminators
••
••
• Low Voltage Logic Supplies
••
••
• Post Regulator for Switching Power Supply
••
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.
Rev. A.2 - Oct., 2003
Pin Description
18
NC
ADJ/GND
2
APL1541-33
3
IN
V
4
NC
Front View for SO - 8
OUT
V
7
OUT
V
6
OUT
V
5
OUT
V
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APL1541
Ordering and Marking Information
APL1541-
APL1541-
APL1541
XXXXX
Lead Free Code
Handling Code
Temp. R ange
Package Code
Voltage Code
XXXXX - Date C od e
Package Code
K : SOP-8
Temp. R ange
C : 0 to 70 C
Handling Code
TU : Tube TR : Tape & Reel
Voltage Code
33: 3.3V Blank : Adjus table Ve rsion
Lead Free Code
L : Lead Free Device Blank : Orginal Device
APL1541- 33 :
°
APL1541
XXXXX33
XXXXX - Date Code
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
I
T
J
T
STG
T
L
Input Voltage 13.2
Operating Junction Temperature Range
Control Section
Power Transistor
0 to 125
0 to 150
Storage Temperature Range -65 to +150
Lead Temperature (Soldering, 10 second) 260
V
C
°
C
°
C
°
Electrical Characteristics
Symbol Parameter Test Conditions
V
REF
APL1541
Output Voltage
Reference Voltage
V
OUT
APL1541-33
Line Regulation
REG
LINE
APL1541
APL1541-33
Load Regulation
REG
LOAD
APL1541
APL1541-33
Dropout Voltage
V
D
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
10mA≤ I
T
=0~125°C
J
T
=0~125°C,
J
0≤ I
OUT
T
=0~125°C
J
I
10mA, 1.5V≤(V
=
OUT
I
0A, 4.75V≤(V
=
OUT
T
=0~125°C
J
(V
IN -VOUT
1A, 1.4V≤(V
≤
OUT
1A, 4.75V≤V
≤
=3V, 0≤ I
)
VIN=4.75V, 0≤ I
I
=100mA ,T
OUT
I
=500mA ,T
OUT
I
OUT
=1A ,T
=0~125°C
J
IN
IN -VOUT
IN -VOUT
≤
OUT
1A ,(note 1)
≤
OUT
=0~125°C
J
=0~125°C
J
IN -VOUT
12V,
≤
)
≤7.75V, (note 1)
)
1A ,(note 1)
≤9.75V,
)
≤9.75V, (note1)
APL1541
Min. Typ. Max.
Unit
1.225 1.250 1.275 V
3.235 3.300 3.365 V
0.03
1
0.1
1
0.2
6
0.4
10
mV
mV
11.1
1.05
1.1
1.2
1.3
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%
%
V
APL1541
Electrical Characteristics Cont.
Symbol Parameter Test Conditions
I
LIMIT
I
∆
Current Limit
Adjust Pin Current
ADJ
Adjust Pin Current
Change
I
ADJ
APL1541
(V
(V
T
1.4V≤(V
)=5V, TJ=25°C
IN -VOUT
=3V, I
)
IN -VOUT
0~125°C, 10mA≤ I
=
J
IN -VOUT
=10mA, TJ=0~125°C
OUT
1A,
≤
OUT
≤9.75V
)
APL1541
Min. Typ. Max.
1
60 120
0.2 5
Unit
A
A
µ
A
µ
APL1541
Minimum Load
Current
I
O
=0~125°C, (V
T
J
)=9.75V, (note 3)
IN -VOUT
1.7 mA
APL1541
PSRR
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.
Ripple Rejection F
Thermal
T
R
Regulation
Temperature
T
S
Stability
Long -Term
L
S
Stability
RMS Output
V
N
Noise
Thermal
θ
th
Resistance
Quiescent Current
I
q
APL1541-33
=120Hz, V
RIPPLE
(V
IN -VOUT
T
=25°C, 30ms Pulse
J
T
J
=25°C,10Hz≤F≤10kHz,
T
J
(% of V
=3V, TJ=0~125°C
)
=125°C,1000Hrs.
)
OUT
Junction to Case, at Tab
Junction to ambient
T
=0~125°C,
J
12V
V
≤
IN
RIPPLE
=1V
P-P,
60 75
0.01 0.02 %/ W
0.5
0.3 %
0.003 %
15
50
5.5 10
dB
%
C/ W
°
mA
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Application Circuits
Simple 5V to 3.3V Regulation
APL15 41-33
IN
=5V
V
10uF
IN
GND
Improving Ripple Rejection
APL15 41
IN
V
10uF
IN
OUT
ADJ
OUT
R2
365
1%
1.25V to 7.75V Adjustable Regulator
APL15 41
IN
V
10uF
OUT
=3.3V
V
10uF
1*
C
IN
ADJ
R2
1K
OUT
121
R1
OUT
V
Ω
100uF
2*
C
*Needed if device is far from filter capacitors
VOUT = 1.250V x
R1+R2
R1
5V Regulator with Shutdown
APL15 41
IN
OUT
V
R1
Ω
121
Ω
C1
10uF
150uF
V
TTL
10uF
1K
IN
1K
ADJ
OUT
121
365Ω
1%
1%
5V
Ω
100uF
*C1 improves ripple rejection.XC should be approximately
equal to R1 at ripple frequency
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Typical Characteristics
Load Transietn Response
5
4.5
4
3.5
3
2.5
2
1.5
1
Output Current (A)
CIN=10µF
COUT=10µF T antalum
VIN=5V
0.5
0
-100 100 300 500 700 900
Time (µS)
Dropout Voltage vs. Output Current
1.25
APL1541-33
0.02
0.01
0
-0.01
-0.02
-0.03
APL1541-33
Line Transient Response
6
5
4
3
2
Input Voltage (V)
1
0
-20 30 80 130 180
CIN=10µF
COUT=10µF T antalum
IOUT=0.1A
Time (µS)
Output Voltage vs. Input V oltage
3.5
APL1541-33
0.15
0.1
0.05
0
-0.05
APL1541-33
1.2
1.15
1.1
1.05
1
Dropout Voltage (V)
0.95
0.9
0 0.2 0.4 0.6 0.8 1
Output Current (A)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
3
2.5
2
1.5
1
Output Voltage (V)
0.5
0
0123456789
Input Voltage (V)
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APL1541
Typical Characteristics Cont.
Input Current vs. Input Voltage
6
5
4
3
2
Input Current (mA)
1
0
024681012
APL1541-33
Input Voltage (V)
Output Voltage vs. Temperature
3.4
3.3
3.2
Output Voltage (V)
3.1
3
-50 -25 0 25 50 75 100 125
APL1541-33
T emperature (°C)
Current Limit vs. Input Voltage
2.4
2.2
2
1.8
1.6
1.4
Current Limit (A)
1.2
1
5 7 9 11 13
Input Voltage (V)
Adjustable Pin Current vs. T emperature
70
68
66
64
62
60
58
56
54
52
Adjustable Pin Current (µA)
50
-50 -25 0 25 50 75 100 125
T emperature (°C)
APL1541-33
APL1541-Adj
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Typical Characteristics Cont.
Input Current vs. Tmeperature
8
7
6
5
4
Input Current (mA)
3
2
-50 -25 0 25 50 75 100 125
T emperature (°C)
PSRR vs. Frequency
+0
Cadj=22µF
IOUT=0.1A
-10
Vripple=1Vp-p
-20
-30
-40
-50
-60
PSRR (dB)
-70
VIN-VOUT>=Vdropout
-80
-90
VIN-VOUT>=3V
-100
50 100 200 500 1k 2k 5k
10
20
10k 20k
Frequency (Hz)
APL1541-33
APL1541-Adj
200k
50k
Current Limit vs. T emperature
1.9
1.8
1.7
1.6
1.5
1.4
Current Limit (A)
1.3
1.2
1.1
1
-50 0 50 100 150
VIN-VOUT=5V
T emperature (°C)
APL1541-33
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Application Information
Output Voltage
The APL1541 develops a 1.25V reference voltage between the output and the adjust terminal. By placing
a resistor between these two terminals, a constant
Current is caused to flow through R1 and down through
R2 to set the overall output voltage. Normally this
current is chosen to be the specified minimum load
current of 10mA. For fixed voltage devices R1 and R2
are included in the device.
= V
APL1541
ADJ
I
ADJ
60µA
REF
(1+ )+ I
OUTIN
R2
R1
ADJ
R2
V
OUT
V
REF
R1
R2
V
IN
OUT
V
Figure 1. Basic Adjustable Regulator
Load Regulation
Rp
V
IN
APL1541
OUTIN
ADJ
PA R AS IT IC
LINE RESISTANCE
R1
CONNECT
R1 TO CASE
R2
CONNECT
R2 TO LOAD
R
Figure 2. Connections for Best Load Regulation
Input Capacitor
An input capacitor of 10µF or greater is recommended.
Tantalum, or aluminum electrolytic capacitors can be
used for bypassing. Larger V alues will improve ripple
rejection by bypassing the input to the regulator.
L
When the adjustable regulator is used. Load regulation will be limited by the resistance of the wire connecting the regulator to the load. The data sheet specification for load regulation is measured at the output
pin of the device. Best load regulation is obtained
when the top of the resistor divider (R1) is tied directly
to the output pin of the device, not to the load. For
fixed voltage devices the top of R1 is internally connected to the output, and the ground pin can be connected to low side of the load. If R1 were connected
to the load, RP is multiplied by the divider ratio, the
effective resistance between the regulator and the load
would be:
Rp X (1+ ), Rp = Parasitic Li n e Resista n ce
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
R2
R1
Output Capacitor
The APL1541 requires an output capacitor to maintain stability and improve transient response. Proper
capacitor selection is important to ensure proper
operation. The APL1541 output capacitor selection
is dependent upon the ESR (equivalent series
resistance) of the output capacitor to maintain stability.
When the output capacitor is 10uF or greater, the output capacitor should have an ESR less than 1Ω.This
will improve transient response as well as promote
stability. A low-ESR solid tantalum capacitor works
extremely well and provides good transient response
and stability over temperature.
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APL1541
Application Information (Cont.)
Output Capacitor (Cont.)
Aluminum electrolytics can also be used, as long as
the ESR of the capacitor is <1Ω. The value of the
output capacitor can be increased without limit. Higher
capacitance values help to improve transient response
and ripple rejection and reduce output noise.
Ripple Rejection
The curves for Ripple Rejection were generated using
an adjustable device with the adjust pin bypassed.
With a 22µF bypassing capacitor 75dB ripple rejection is obtainable at any output level. The impedance
of the adjust pin capacitor, at the ripple frequency,
should be < R1. R1 is normally in the range of 100Ω-
200Ω. The size of the required adjust pin capacitor is
a function of the input ripple frequency. At 120Hz,
with R1=100Ω, the adjust pin capacitor should be
PD = (VIN - VOUT) x IOUT
Maximum junction temperature is equal to :
TJUNCTION = TAMBIENT + (PD x θJA)
Note: TJUNCTION must not exceed 125°C
13µF. For fixed voltage devices, and adjustable devices without an adjust pin capacitor, the output ripple
will increase as the ratio of the output voltage to the
reference voltage (VOUT /VREF ).
Thermal Considerations
APL1541 has thermal protection which limits junction
temperature to 150°C. However, device functionality
is only guaranteed to a maximum junction temperature of +125°C. The thermal resistance for each application will be affected by thermal interactions with
other components on the board. Some experimentation will be necessary to determine the actual value.
The power dissipation of APL1541 is equal to :
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Packaging Information
SOP-8 pin ( Reference JEDEC Registration MS-012)
HE
0.015X45
e1 e2
D
A1
A
1
L
0.004max.
Dim
A 1.35 1.75 0.053 0.069
A1 0.10 0.25 0.004 0. 010
D 4.80 5.00 0.189 0.197
E 3.80 4.00 0.150 0.157
H 5.80 6.20 0.228 0.244
L 0.40 1.27 0.016 0.050
e1 0.33 0.51 0.013 0. 020
e2 1.27BSC 0.50BSC
18
φ
Millimeters Inches
Min. Max. Min. Max.
°
8
°
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Physical Specifications
Terminal Material Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb)
Lead Solderability Meets EIA Specification RSI86-91, A NSI/J-STD-002 Category 3.
Reflow Condition (IR/Convection or VPR Reflow)
Reference JEDEC Standard J-STD-020A APRIL 1999
Peak temperature
temperature
Pre-heat temperature
°
183 C
Time
Classification Reflow Profiles
Convection or IR/
Convection
Average ramp-up rate(183°C to Peak) 3°C/second max. 10 °C /second max .
Preheat temperature 125 ± 25°C)
Tem perature maintained above 183°C
Time within 5°C of actual peak temperature
Peak temperature range
Ramp-down rate
Time 25°C to peak temperature
120 seconds max
60 – 150 seconds
10 –20 seconds 60 seconds
220 +5/-0°C or 235 +5/-0°C 215-219°C or 235 +5/-0°C
6 °C /second max . 10 °C /second max .
6 minutes max.
VPR
Package Reflow Conditions
pkg. thickness
and all bgas
Convection 220 +5/-0 °C Convection 235 +5/- 0 °C
VPR 215-219 °C VPR 235 +5/-0 °C
IR/Convection 220 +5/-0 °C IR/Convection 235 +5/-0 °C
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
2.5mm
≥≥≥≥
pkg. thickness < 2.5mm and
pkg. volume
350 mm³
≥≥≥≥
pkg. thickness < 2.5mm and pkg.
volume < 350mm³
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APL1541
Re lia b ility te s t p ro g r am
Test item Method Description
SOLDERABILITY M IL-STD-883D-2003
HOLT MIL-STD-883D-1005.7
PCT JESD-22-B, A102
TST MIL-STD-883D-1011.9
ESD MIL-STD-883D-3015.7 VHBM > 2KV, VMM > 200V
Latch-U p JESD 78 10ms , Itr > 100mA
245°C , 5 SEC
1000 Hrs Bias @ 125 °C
168 Hrs, 100 % RH , 121°C
-65°C ~ 150°C, 200 C y c les
Carrier Tape
W
t
E
F
A
Po
P
P1
Ao
J
C
D
Bo
Ko
D1
T2
B
T1
Application A B C J T1 T2 W P E
330 ± 162 +1.5
12.75+
0.15
2 ± 0.5 12.4 ± 0.2 2 ± 0.2 12± 0. 3 8± 0.1 1.75±0.1
F D D1 Po P1 Ao Bo Ko tSOP- 8
5.5± 1 1.55 +0.1 1.55+ 0.25 4.0 ± 0.1 2.0 ± 0.1 6.4 ± 0.1 5.2± 0. 1 2.1± 0.1 0.3±0.013
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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APL1541
Cover Tape Dimensions
Application Carrier Width Cover Tape Width Devices Per Reel
SOP- 8
Customer Service
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
12 9.3 2500
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
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