BL8503

BL8503
250mA CMOS Low Dropout Voltage Low consumption Regulator
Outline：
Features：





Low Power Consumption：3.0uA（Typ.）
BL8503 series is a group of positive
voltage output, low power consumption, low
dropout voltage, three terminal regulator. It
can provide 250mA output current when
input / output voltage differential drops to
400mV（Vin =4.0V、Vout=3.0V）。The
very low power consumption of BL8503
（Iq=3.0uA）can greatly improve natural life
of batteries.
Maximum Output Current： 250mA
Small Dropout Voltage：
170mV@100mA (Vout=3.0V)
400mV@250mA (Vout=3.0V)
Input Voltage Range：1.5V～10V
Output Voltage Range：1.2V~6.0V
（customized on command in 0.1V steps）


BL8503 can provide output value in the
range of 1.2V~6.0V in 0.1V steps. It also can
customized on command.
Highly Accurate：±2%(±1% customized）
Output Current Limit
Applications：


BL8503 includes high accuracy voltage
reference, error amplifier, current limit circuit
and output driver module.
Battery Powered equipment
Power Management of MP3、PDA、DSC、
Mouse、PS2 Games


BL8503 has well load transient response
and good temperature characteristic, which
can assure the stability of chip and power
system. And it uses trimming technique to
guarantee output voltage accuracy within±
2%.
Reference Voltage Source
Regulation after Switching Power
BL8503 is available in SOT-89-3、SOT23-3,TO-92 packages which is lead free，it
also can available in these packages with
lead.
BL8503 Typical Performance
Characteristic：
BL8503 Typical Application Circuit
Output Voltage
（V ）
Output Voltage VS. Output
Current(Vout=1.5V)
1.6
1.5
1.4
1.3
1.2
1.1
1
0
Application hints：
100
200
300
Output Current（mA）
NOTE1：Input capacitor (Cin=1uF) is recommended in
all application circuit. Tantalum capacitor is
recommended.
NOTE2：Output capacitor (Cout=1uF) is recommended
in all application to assure the stability of
circuit. Tantalum capacitor is recommended.
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- 1Total 12 Pages
9/7/2012
BL8503
Selection Guide：
Pin Assignment：
Product
Classification
BL8503-XX X X X
Pin Configuration
BL8503-□□□PRM
Packages：
RM：SOT-23-3
SM：SOT-89-3
(Default)
SA：SOT-89-3
SB：SOT-89-3
T：TO-92
BL8503-□□□PSM
Output accucy：
Default，±2％
1： ±1％
（customized）
Temperature range：
P：Standard
（Default、lead free）
C：Standard
（customized）
Output Voltage：
12……1.2V
18……1.8V
21……2.1V
25……2.5V
28……2.8V
30……3.0V
35……3.5V
40……4.0V
45……4.5V
……
50……5.0V
60……6.0V
BL8503-□□□PSA
BL8503-□□□PSB
BL8503-□□□PT
Pin Description：
Pin number
SOT-23-3
SOT-89-3
（SM）
1
3
2
1
2
3
http://www.belling.com.cn
SOT-89-3
(SA)
1
3
2
SOT-89-3
(SB)
2
3
1
TO-92
1
2
3
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PIN Name
Function
Vss
Vin
Vout
Ground
Supply voltage input
Output Voltage
9/7/2012
BL8503
Product Classification：
Product Name
Output Voltage
Package Type
BL8503-12PRM
BL8503-15PRM
BL8503-21PRM
BL8503-25PRM
BL8503-30PRM
---------BL8503-50PRM
BL8503-12PSM
BL8503-15PSM
BL8503-21PSM
BL8503-25PSM
BL8503-30PSM
---------BL8503-50PSM
BL8503-12PSA
BL8503-15PSA
BL8503-21PSA
BL8503-25PSA
BL8503-30PSA
---------BL8503-50PSA
BL8503-12PSB
BL8503-15PSB
BL8503-21PSB
BL8503-25PSB
BL8503-30PSB
---------BL8503-50PSB
BL8503-12PT
BL8503-15PT
BL8503-21PT
BL8503-25PT
BL8503-30PT
---------BL8503-50PT
1.2V
1.5V
2.1V
2.5V
3.0V
---------5.0V
1.2V
1.5V
2.1V
2.5V
3.0V
---------5.0V
1.2V
1.5V
2.1V
2.5V
3.0V
---------5.0V
1.2V
1.5V
2.1V
2.5V
3.0V
---------5.0V
1.2V
1.5V
2.1V
2.5V
3.0V
---------5.0V
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
SOT-89-3
TO-92
TO-92
TO-92
TO-92
TO-92
TO-92
TO-92
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- 3Total 12 Pages
Package Marking
9/7/2012
BL8503
Block Diagram：
Absolute Maximum Ratings：
Max input voltage ---------------------------------------------------------------------------------- 10V
Junction Temperature (TJ) ----------------------------------------------------------------------- 125C
Ambient Temperature(TA) ------------------------------------------------------------------------ -40C～85C
Power Dissipation
SOT-23-3 ------------------------------------------------------------------------------------------ 0.15W
SOT-23-5 ------------------------------------------------------------------------------------------ 0.25W
SOT-89-3 ------------------------------------------------------------------------------------------ 0.5W
Storage Temperature(Ts) ------------------------------------------------------------------------ -45C～150C
Lead Temperature and Time -------------------------------------------------------------------- 260C,10S
Recommended Work Conditions：
Item
Input Voltage Range
Ambient Temperature
Min
Recommended
-40
Max
8
+125
unit
V
C
Electrical Characteristics：
（Test Conditions：Cin=1uF,Cout=1uF,TA=25C, unless otherwise specified. ）
BL8503-1.5V
Symbol
Parameter
Conditions
Min
Typ
Max
Vin
Input Voltage
8
Vout
Output Voltage
1.47
1.5
1.53
Maximum Output
Iout(Max.)
Vin=2.5V,Vout>1.47
250
Current
Dropout
Input-Output
Iout=100mA
270
400
Voltage Voltage Differential
Units
V
V
mA
mV
Vout
Vin  Vout
Line Regulation
Iout=40mA
1.6V≤Vin≤8V
0.2
0.3
%/V
Vout
Load Regulation
Vin=2.5V
1mA≤Iout≤100mA
20
40
mV
Iq
Quiescent
Current
Vin=2.5V
3.0
5.0
uA
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9/7/2012
BL8503
Vout
T  Vout
Output Voltage
Temperature
Coefficient
BL8503-1.8V
Symbol
Vin
Vout
Parameter
Input Voltage
Output Voltage
Maximum Output
Iout(Max.)
Current
Dropout
Input-Output
Voltage Voltage Differential
Iout=10mA
Conditions
Vin=2.8V,Vout>1.764
50
Min
Typ
1.764
1.8
ppm/C
Max
8
1.836
250
Units
V
V
mA
Iout=100mA
270
400
mV
Vout
Vin  Vout
Line Regulation
Iout=40mA
2V≤Vin≤8V
0.2
0.3
%/V
Vout
Load Regulation
Vin=2.8V
1mA≤Iout≤100mA
20
40
mV
Vin=2.8V
3.0
5.0
uA
Iout=10mA
50
Iq
Vout
T  Vout
BL8503-2.8V
Symbol
Vin
Vout
Iout(Max.)
Dropout
Voltage
Quiescent
Current
Output Voltage
Temperature
Coefficient
Parameter
Input Voltage
Output Voltage
Maximum
Output Current
Input-Output
Voltage
Differential
Vout
Vin  Vout
Line Regulation
Vout
Load Regulation
Iq
Vout
T  Vout
BL8503-3.0V
Symbol
Vin
Vout
Iout(Max.)
Dropout
Voltage
Vout
Vin  Vout
Quiescent
Current
Output Voltage
Temperature
Coefficient
Conditions
Vin=4V,Vout>2.744V
Typ
2.744
2.8
Max
8
2.856
250
Units
V
V
mA
Iout=100mA
170
300
Iout=200mA
320
500
0.2
0.3
%/V
20
40
mV
Vin=3.8V
3.0
5.0
uA
Iout=10mA
50
Iout=40mA
3V≤Vin≤8V
Vin=3.8V
1mA≤Iout≤100mA
Parameter
Input Voltage
Output Voltage
Maximum
Output Current
Input-Output
Voltage
Differential
Vin=4V,Vout>2.94V
Line Regulation
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Min
ppm/C
Conditions
Min
Typ
2.94
3.0
ppm/C
Max
8
3.06
250
Units
V
V
mA
Iout=100mA
170
300
Iout=200mA
320
500
Iout=40mA
3.2V≤Vin≤8V
0.2
0.3
- 5Total 12 Pages
mV
mV
%/V
9/7/2012
BL8503
Vout
Iq
Vout
T  Vout
BL8503-5.0V
Symbol
Vin
Vout
Iout(Max.)
Dropout
Voltage
Load Regulation
Quiescent
Current
Output Voltage
Temperature
Coefficient
Parameter
Input Voltage
Output Voltage
Maximum
Output Current
Input-Output
Voltage
Differential
Vout
Vin  Vout
Line Regulation
Vout
Load Regulation
Iq
Vout
T  Vout
Quiescent
Current
Output Voltage
Temperature
Coefficient
Typical Application Circuit：
Vin=4.0V
1mA≤Iout≤100mA
20
40
mV
Vin=4V
3.0
5.0
uA
Iout=10mA
50
Conditions
Vin=6V,Vout>4.9V
Min
Typ
4.9
5.0
ppm/C
Max
8
5.1
250
Units
V
V
mA
Iout=100mA
170
300
Iout=200mA
320
500
0.2
0.3
%/V
20
40
mV
Vin=6V
3.0
5.0
uA
Iout=10mA
50
Iout=40mA
5.2V≤Vin≤8V
Vin=6.0V
1mA≤Iout≤100mA
mV
ppm/C
Application hints：
NOTE1 ： Input capacitor (Cin=1uF) is
recommended in all application circuit.
Tantalum capacitor is recommended.
NOTE2 ： Output capacitor (Cout=1uF) is
recommended in all application to
assure the stability of circuit. Tantalum
capacitor is recommended.
Explanation：
BL8503 is a series of low dropout voltage and low power consumption three pins regulator. Its
application circuit is very simple, which only needs two outside capacitors. It is composed of these
modules: high accuracy voltage reference, current limit circuit, error amplifier, output driver and
power transistor.
Current Limit module can keep chip and power system away from danger when load current is
more than 250mA.
BL8503 uses trimming technique to assure the accuracy of output value within±2%, at the
same time, temperature compensated is elaborately considered in this chip, which makes BL8503’s
temperature coefficient within 50ppm/℃。
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9/7/2012
BL8503
Typical Performance Characteristics：
1.Load regulation
Output Voltage VS Output Current(Vout=3.0V)
1.6
Output Voltage （V）
Output Voltage （V）
Output Voltage VS Output Current(Vout=1.5V)
1.5
1.4
1.3
1.2
1.1
1
0
50
100
150
200
250
3.05
3
2.95
2.9
2.85
2.8
300
0
50
100
150
200
250
300
Output Current （mA）
Output Current（mA）
2.Line Regulation
Line regulation (Vout=3.0V)
1.51
Output Voltage（V）
Output Voltage （V）
Line regulation（Vout=1.5V)
1.505
1.5
1.495
1.49
Iout=40mA
Iout=6mA
1.485
1.48
1
2
3
4
5
6
7
3.07
3.05
3.03
3.01
2.99
2.97
Iout=40mA
Iout=3mA
2.95
2.93
8
3
4
5
Input Voltage（V）
6
7
8
9
10
Input Voltage（V）
3.Dropout Voltage
Dropout Voltage (Vout=3.0V)
1.6
Output Voltage（V）
Output Voltage（V）
Dropout Voltage (Vout=1.5V)
1.5
1.4
1.3
1.2
Iout=100mA
Iout=200mA
1.1
1
1.5
1.8
2.1
2.4
2.7
3.05
3.04
3.03
3.02
3.01
3
2.99
2.98
2.97
2.96
3
3
3.2
3.4
3.6
3.8
4
Input Voltage（V）
Input Voltage（V）
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Iout=100mA
Iout=200mA
- 7Total 12 Pages
9/7/2012
BL8503
Input Voltage transient response
（Vout=1.5V,Iout=1mA）
4．Input Voltage transient response
（Vout=1.5V,Iout=10mA）
Cin=Cout=1uF
Cin=Cout=1uF
Vin=3.5V
Vin=3.5V
Vin=2.5V
Vin=2.5V
Input Voltage transient response
（Vout=3.0V,Iout=10mA）
Input Voltage transient response
（Vout=3.0V,Iout=1mA）
Cin=Cout=1uF
Cin=Cout=1uF
Vin=5V
Vin=5V
Vin=4V
Vin=4V
5．Load transient response（Vout=1.5V）
Load transient response（Vout=3.0V）
Iout=40mA
Iout=40mA
Iout=1mA
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Iout=1mA
- 8Total 12 Pages
9/7/2012
BL8503
Package Outline：
Package
SOT-89-3
Devices per
reel
1000
Unit
mm
Package Dimension:
Taping Specification:（M1：Standard Type，M2：Customized）
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9/7/2012
BL8503
Taping Reel Dimension：
SOT-23-3:
Package
SOT-23-3
Devices per
reel
3000
Unit
mm
Package dimension：
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9/7/2012
BL8503
Taping Specification：
Taping reel dimension：
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9/7/2012
BL8503
SOT-23-5:
Package
SOT-23-5
Devices per
reel
3000
Unit
mm
Package specification：
Taping dimension：（M1：Standard Type ，M2：Customized）
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9/7/2012
BL8503
Taping reel dimension：
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9/7/2012