Low I
Q
, Low Dropout 500mA Fixed Voltage Regulator
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
1
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.
Features
Design with an internal P-channel MOSFET pass
transistor, the APL5501/2/3 maintains a low supply
current, independent of the load current and dropout
voltage. Other features include reverse current
protection, thermal-shutdown protection, current limit
protection to ensure specified output current and con-
trolled short-circuit current. The APL5501/2/3 regu-
lator comes in a miniature SOT-23-5, SOT-89, SOT-
89-5, SOT-223, SO-8, TO-252 and TO-252-5
packages.
Applications
• Notebook Computer
• PDA or Portable Equipments
• Noise-Sensitive Instrumentation Systems
••••• Low Noise : 50µV
RMS
(100Hz to 100kHz)
••••• Low Quiescent Current : 50µA (No load)
••••• Low Dropout Voltage : 170mV (@500mA)
••••• Very low Shutdown Current : < 0.5uA
••••• Fixed Output Voltage : 1.3V ~ 3.4V
••••• Stable with 4.7uF Output Capacitor
••••• Stable with Aluminum , Tantalum or Ceramic
Capacitors .
••••• Reverse Current Protection
••••• No Protection Diodes Needed
••••• Built in Thermal Protection
••••• Built in Current Limit Protection
••••• Controlled Short Circuit Current : 150mA
••••• Fast Transient Response
••••• Short Setting Time
••••• SOT-23-5, SOT-89, SOT-89-5, SOT-223, SO-8
,TO-252 and TO-252-5 Packages
Pin Configuration
SOT-89 (Top View)
V
IN
G N D
V
O U T
1
2
3
T A B is G N D
SOT-89-5 (Top
View)
SO-8 (Top View)
1
2
3
4
5
6
7
8
IN
G N D
G N D
SH D N
BYP
GN D
GN D
OU T
TO-252-5 (Top View)
General Description
The APL5501/2/3 is micropower, low noise, low drop-
out linear regulator. Operate from 2.7V to 6V input
voltage and deliver up to 500mA. Typical output noise
is just 50
µV
RMS
with the addition of an external 0.1
µF
bypass capacitor in BP pin and typical dropout volt-
age is only 170mV at 500mA loading . Designed for
use in battery-powered system, the low 50uA quies-
cent current makes it an ideal choice.
TO-252 (Top View)
G ND
1
2
3
V
OUT
V
IN
V
IN
G N D
V
OUT
1
2
3
5
4
S H D N
B P
G N D
BP
V
OUT
GND
V
IN
12
3
4
5
TAB i
s G
N
D
SHDN
SOT-23-5 (Top View)
1
2
3
4
5
V
IN
G N D
SH D N
BP
V
O U T
APL5501
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
2
Product Name
Marking
Product Name
Marking
Product Name
Marking
APL5501-13B
517X
APL5502-13B
527X
APL5503-13B
537X
APL5501-14B
518X
APL5502-14B
528X
APL5503-14B
538X
APL5501-15B
519X
APL5502-15B
529X
APL5503-15B
539X
APL5501-16B
51AX
APL5502-16B
52AX
APL5503-16B
53AX
APL5501-17B
51BX
APL5502-17B
52BX
APL5503-17B
53BX
APL5501-18B
51CX
APL5502-18B
52CX
APL5503-18B
53CX
APL5501-19B
51DX
APL5502-19B
52DX
APL5503-19B
53DX
APL5501-20B
51EX
APL5502-20B
52EX
APL5503-20B
53EX
APL5501-21B
51FX
APL5502-21B
52FX
APL5503-21B
53FX
APL5501-22B
51GX
APL5502-22B
52GX
APL5503-22B
53GX
APL5501-23B
51HX
APL5502-23B
52HX
APL5503-23B
53HX
APL5501-24B
51IX
APL5502-24B
52IX
APL5503-24B
53IX
APL5501-25B
51JX
APL5502-25B
52JX
APL5503-25B
53JX
APL5501-26B
51KX
APL5502-26B
52KX
APL5503-26B
53KX
APL5501-27B
51LX
APL5502-27B
52LX
APL5503-27B
53LX
P a c k a g e C o d e
B : S O T - 2 3 - 5 D : S O T - 8 9 D 5 : S O T - 8 9 - 5
U : T O - 2 5 2 U 5 : T O - 2 5 2 -5 V : S O T - 2 2 3
K : S O - 8
T e m p . R a n g e
C : 0 to 7 0 C
H a n d lin g C o d e
T R : T a p e & R e e l
V o lt a g e C o d e :
1 3 : 1 .3 V ~ 3 4 : 3 .4 V
A P L 5 5 0 1 /2 /3 -
H a n d lin g C o d e
T e m p . R a n g e
P a c k a g e C o d e
V o lt a g e C o d e
1 3
A P L 5 5 0 1 /2 / 3
X X X X X
A P L 5 5 0 1 /2 / 3 - 1 3 U :
X X X X X - D a t e C o d e , 1 3 - 1 . 3 V
X X X X X - D a t e C o d e , 1 3 - 1 . 3 V
A P L 5 5 0 1 /2 / 3
X X X X X 1 3
A P L 5 5 0 1 /2 / 3 - 1 3 D / V /K :
°
Ordering and Marking Information
Pin Configuration (Cont.)
SOT-223 (Top View)
V
OUT
G N D
V
IN
1
2
3
TA B is G N D
APL5501
APL5502
SOT-89 (Top View)
GND
V
IN
V
OUT
1
2
3
TAB is V
IN
V
IN
G N D
V
OUT
1
2
3
TA B is G N D
SOT-223 (Top View)
APL5503
V
OUT
V
IN
G N D
1
2
3
TA B is V
IN
SOT-223 (Top View)
APL5502
Marking Information
SOT-23-5 package
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
3
Product Name
Marking
Product Name
Marking
Product Name
Marking
APL5501-28B
51MX
APL5502-28B
52MX
APL5503-28B
53MX
APL5501-29B
51NX
APL5502-29B
52NX
APL5503-29B
53NX
APL5501-30B
51OX
APL5502-30B
52OX
APL5503-30B
53OX
APL5501-31B
51PX
APL5502-31B
52PX
APL5503-31B
53PX
APL5501-32B
51QX
APL5502-32B
52QX
APL5503-32B
53QX
APL5501-33B
51RX
APL5502-33B
52RX
APL5503-33B
53RX
APL5501-34B
51SX
APL5502-34B
52SX
APL5503-34B
53SX
Pin Description
PIN
No.
Name
I/O
Description
1
V
IN
I
Supply voltage input.
2
SHDN
(Note1)
I
Shutdown control pin, low = off , high = normal .
3
GND
Ground pins of the circuitry, and all ground pins must be soldered to
PCB with proper power dissipation.
4
BP
(Note1)
O
Bypass signal pin in fixed output type device
5
V
OUT
O
Output pin of the regulator.
Marking Information (Cont.)
SOT-23-5 package
Note1 : These pins do not exist in 3-pin package.
Symbol
Parameter
Rating
Unit
V
IN
, V
OUT
Input Voltage or Out Voltage
5
V
SHDN
Shutdown Control Pin
5
V
R
TH,JA
Thermal Resistance – Junction to Ambient
SOT-89 : 180
SOT-223 : 135
SO-8 : 210
SOT-23-5 : 357
°C/W
P
D
Power Dissipation
Internally Limited
W
T
J
Operating Junction Temperature
°C
Control Section
0 to 125
Power Transistor
0 to 150
T
STG
Storage Temperature Range
-65 to +150
°C
T
L
Lead Temperature (Soldering, 10 second)
260
°C
Absolute Maximum Ratings
The last character “X” in the marking is for data code.
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
4
Electrical Characteristics
Unless otherwise noted these specifications apply over full temperature, V
IN
=3.6V, C
IN
=1
µF, C
OUT
=4.7
µF,
SHDN=V
IN
, T
J
=0 to 125
°C. Typical values refer to T
J
=25
°C.
APL5501/2/3
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
IN
Input Voltage
2.7
6
V
V
OUT
Output Voltage
V
OUT
+1.0V< V
CC
<6.0V, 0mA< I
OUT
< I
MAX
V
OUT
-2
%
V
OUT
V
OUT
+2
%
V
I
LIMIT
Circuit Current Limit
V
IN
=4.3V
0.7
A
I
SHORT
Short Current
V
OUT
=0V
200
mA
I
OUT
Load Current
500
mA
REG
LINE
Line Regulation
V
OUT
+0.5V< V
CC
<6.0V, 0mA< I
OUT
< I
MAX
4
10
mV
REG
LOAD
Load Regulation
V
IN
=V
OUT
+1.0V, 0mA< I
OUT
< I
MAX
1
6
mV
V
DROP
Dropout Voltage
(Note2)
(V
OUT
(Nominal)=3.0V
Version)
I
OUT
=500mA
170
300
mV
PSRR Ripple Rejection
F
≤1kHz, 1Vpp at V
IN
= V
OUT
+1.0V
55
65
dB
No load
50
100
I
Q
Quiescent Current
I
OUT
=500mA
370
450
µA
Shutdown Supply
Current
(Note3)
Shutdown = low
I
OUT
=0, V
CC
=6.0V
0.01
1
µA
100Hz<f<100kHz, typical load,
C
BP
=0.01
µF, C
OUT
= 1
µF
50
Noise
(Note3)
100Hz<f<100kHz, typical load,
C
BP
=0.1
µF, C
OUT
= 1
µF
40
µVrms
C
BP
=0.01
µF,C
OUT
=1
µF, no load
7
Shutdown Recovery
Delay
(Note3)
C
BP
=0.1
µF,C
OUT
=1
µF, no load
70
ms
OTS
Over Temperature
Shutdown
150
°C
Over Temperature
Shutdown Hysteresis
Hysteries
10
°C
TC
Output Voltage
Temperature
Coefficient
50
ppm/
°C
C
OUT
Output Capacitor
4.2
4.7
5.2
µF
ESR
0.02
0.1
1
Ohm
Shutdown Input
Threshold
(Note3)
V
OUT
+1.0V< V
IN
<6.0V
0.4
0.7
1.6
V
I
SHDN
Shutdown input Bias
current
(Note3)
V
SHDN
=V
IN
0.01
100
nA
Input Reverse Leakage
current
V
OUT
-V
IN
=0.1V
0.1
0.5
µA
Reverse Protection
Threshold
11
50
mV
Note 2 : Dropout voltage definition : V
IN
-V
OUT
when V
OUT
is 2% below the value of V
OUT
for V
IN
= V
OUT
+ 0.5V
Note 3 : For 5-pin devices only.
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
5
Application Circuit
BP
V
O U T
V
IN
G N D
SH D N
VO U T
C
IN
1uF
off
on
AP L5501/2/3
IN P U T
2.7V to 6V
0.1uF
C
BP
C
O U T
4.7uF
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
6
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
0
0.5
1
1.5
2
2.5
3
3.5
0
1
2
3
4
5
6
0
50
100
150
200
250
300
350
0
1
2
3
4
5
6
0
50
100
150
200
250
300
350
400
0
150
300
450
600
750
900
Typical Characteristics
Input Voltage (V)
Current Limit (mA)
Ground Pin Current vs. Load Current (uA)
Output Current (mA)
Input Voltage (V)
Ground Pin Current vs. Load Current (uA)
Input Voltage (V)
Output V
oltage (V)
APL5501/2/3-33
APL5501/2/3-33
APL5501/2/3-33
APL5501/2/3-33
Input Voltage vs. Output Voltage
Ground Pin Current vs. Input Voltage
Current Limit vs. Input Voltage
Ground Pin Current vs. Output Current
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
7
-100
+0
-90
-80
-70
-60
-50
-40
-30
-20
-10
20
200k
50 100 200
500 1k
2k
5k 10k 20k
50k 100k
0.4
0.5
0.6
0.7
0.8
0.9
1
3
3.5
4
4.5
5
5.5
6
-12
-10
-8
-6
-4
-2
0
0
0.5
1
1.5
2
2.5
3
0
50
100
150
200
250
0
150
300
450
600
750
900
Typical Characteristics
SHDN Threshold V
oltage (V)
Input Voltage (V)
PSRR vs. Frequency
Frequency (H
Z
)
PSRR (dB)
I
OUT
=50mA
C
OUT
=10uF
C
BP
=0.1uF
Output Current (uA)
Output Voltage (V)
Output Current (mA)
Dropout V
oltage (mV)
V
IN
=0V
V
IN
=0V
V
IN
=4V
V
IN
=5V
APL5501/2/3-33
APL5501/2/3-33
APL5501/2/3-33
Dropout Voltage vs. Output Current
Output Current vs. Output Voltage
APL5501/2/3-33
SHDN Threshold Voltage vs. Input Voltage
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
8
0
50
100
150
200
250
300
350
400
450
500
0
0.1
0.2
0.3
0.4
-100u
100u
-80u
-60u
-40u
-20u
0
20u
40u
60u
80u
0
10m
2m
4m
6m
8m
Typical Characteristics
Output Noise
Time (s)
V
OUT
(50uV/div)
V
IN=
4.3V
I
OUT
=0mA
C
OUT
=10uF
C
BP
=0.1uF
Output Noise vs. Bypass Capacitor
Output Noise (uV)
Bypass Capacitor (uF)
Time (1ms/div)
V
OUT
v
SHDN
Shutdown Exit Delay
Time (20ms/div)
V
OUT
v
SHDN
C
BP
=100nF
No Load
Shutdown Exit Delay
APL5501/2/3-33
3.3V
4V
3.3V
4V
0V
0V
0V
0V
C
BP
=10nF
No Load
APL5501/2/3-33
APL5501/2/3-33
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
9
0.001
0.01
0.1
1
0
150
300
450
600
750
900
V
OUT
C
OUT
=1
µF
No Load
Typical Characteristics
Entering Shutdown
Time (200ms/div)
V
OUT
=3.3V
Region of Stable ESR vs. Load Current
Load Current (mA)
C
OUT
ESR (
Ω
)
unstable
stable
APL5501/2/3-33
APL5501/2/3-33
3.3V
4V
0V
0V
3.25
3.27
3.29
3.31
3.33
3.35
-40
0
40
80
120
Temperature (°C )
Output V
oltage (V)
APL5501/2/3-33
Output Voltage vs. Temperature
Time (40
µs/div)
V
OUT
V
IN
Line-Transient Response
Output V
oltage (20mV/div)
APL5901/2-33
4V
3V
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
10
C
OUT
=1
µF
V
IN
=V
OUT
+1V
Typical Characteristics
Time (10
µs/div)
APL5501/2/3-33
I
OUT
=1mA~500mA
Output V
oltage (50mV/div)
Load-Transient Response
V
OUT
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
11
The minimum input-output voltage difference (dropout)
determines the lowest usable supply voltage. In bat-
tery-powered systems, this will determine the useful
end-of-life battery voltage. Because the APL5501/2/3
use a p-channel MOSFET pass transistor, the drop-
out voltage is a function of drain-to-source on-resis-
tance (R
DS(ON)
) multiplied by the load current.
The APL5501/2/3 load-transient response graphs in
typical characteristics show the transient response.
A step change in the load current from 0mA to 500mA
at 1us will cause a 100mV transient spike. Larger
output capacitor and lower ESR can reduce transient
spike.
Application Information
Capacitor Selection and Regulator
Stability
The APL5501/2/3 use at least a 1uF capacitor on the
input, and this capacitor can be Aluminum, Tantalum
or Ceramic capacitor. The input capacitor with larger
value and lower ESR provides better PSRR and line-
transient response. The output capacitor also can use
Aluminum, Tantalum or Ceramic capacitor, and a mini-
mum value of 1uF and ESR above 0.06
Ω is
recommended. The curve of the stable region in typi-
cal characteristics shows the appropriate output ca-
pacitor ESR for different load current stable operation.
A larger output capacitor can reduce noise and im-
prove load-transient response, stability, and PSRR.
Note that some ceramic dielectrics exhibit large ca-
pacitance and ESR variation with temperature. When
using this capacitor, a minimum 10uF or more may
be required to ensure the stability at low temperature
operation. Use a bypass capacitor at BP pin for low
output nvise. Increasing the capacitance will slightly
decrease the output noise, but increase the start-up
time.
Load-Transient Considerations
Input-Output (Dropout)Voltage
Reverse Current Protection
The APL5501/2/3 have an internal reverse protection,
it does not need an external schottky diode to con-
nect the regulator input and output. If the output volt-
age is forced above the input voltage by more than
11mV, the IC will be shutdown and the ground pin
current is below 0.1uA.
Current Limit
The APL5501/2/3 have a current limit protection. The
ouptut voltage will drop close to zero volt, when load
current reaches the limit, and then the load current
will be limited at 150mA after output voltage is below
0.7V. When the load current back to the value where
limiting started, the output voltage and current will re-
turn to normal value. When output is shorted to
ground, the APL5501/2/3 will keep short circuit cur-
rent at 150mA .
Copyright ANPEC Electronics Corp.
Rev. A.9 - May., 2003
APL5501/2/3
www.anpec.com.tw
12
Thermal protection limits total power dissipation in the<