BL9118
800mA Adjustable Voltage High Speed LDO Regulators BL9118 Series
General Description
Features
The BL9118 series are highly accurate, low noise,
LDO Voltage Regulators that are capable of
providing an output current that is in excess of
800mA with a maximum dropout voltage of 1.0V at
800mA（BL9118-1.8V）.This series contains three
fixed output voltages of 1.2V,1.8 V and 2.5V that
have no minimum load requirement to maintain
regulation. On chip trimming adjusts the
reference/output voltage to within ±2% accuracy.
Internal protection features consist of output
current limiting, safe operating area compensation,
and thermal shutdown. The BL9118series can
operate with up to 15 V input. Devices are available
in SOT223.
Output Current in Excess of 800mA
Dropout Voltage:115mV@ IOUT =100mA
（BL9118-1.8V）
Operating Voltage Range: 2.5V～15V
Highly Accuracy: ±2％
Adjustable Output Voltage Option
Standby Current: 52uA（TYP.）
High Ripple Rejection: 70dB@1KHz（BL9118-1.8V）
Line Regulation: 2mV（TYP.）
Temperature Stability≤0.5%
Thermal Shutdown Protection：160℃
Packages:SOT223
Typical Application
Selection Guide
BL9118-VVV X X XX
Package:
F: SOT-223-3
Consumer and Industrial Equipment Point of
Regulation
Switching Power Supply Post Regulation
Hard Drive Controllers
Battery Chargers
Typical Application Circuit
Features:
P: Standard (default, lead free)
C: Customized
Output Voltage Accuracy
A: ±1%
B: ±2%
Output Voltage
120:1.2V 180:1.8V
250:2.5V
Page1
www.belling.com.cn
V1.0
BL9118
Pin Configuration
SOT223
Pin Assignment
BL9118
Pin Number
Pin Name
Functions
1
GND
Ground
2
VOUT
Output
3
VIN
Power Input
Pin Name
Functions
1
GND
Ground
3
VOUT
Output
2
VIN
Power Input
SOT223
BL9118E
Pin Number
SOT223
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Units
Input Voltage
VIN
18
V
Output Current
IOUT
1.1
A
Output Voltage
VOUT
Vss-0.3～VIN +0.3
V
PD
750
mW
Operating Temperature Range
TOPR
－40～＋125
℃
Storage Temperature Range
TSTG
－40～＋150
℃
Power Dissipation
SOT223
Lead Temperature
Page2
260℃，4sec
www.belling.com.cn
V1.0
BL9118
Block Diagram
Electrical Characteristics
BL9118-1.2V
(VIN= VOUT+1.3V，CIN=CL=10uF，Ta=25OC, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Output Voltage
VOUT(E)
(Note 2)
IOUT=10mA,
VIN= VOUT+1.3V
X 0.98
VOUT (T)
(Note 1)
X 1.02
V
Maximum Output
Current
IOUTMAX
VIN= VOUT+1.3V
800
Load Regulation
∆VOUT
VIN= VOUT+1.3V ,
1mA≤IOUT≤800mA
3
VDIF1
IOUT =100mA
195
mV
mA
10
mV
Dropout Voltage
(Note 3)
VDIF2
IOUT =400mA
665
mV
VDIF3
IOUT =800mA
1250
mV
Quiescent Current
Iss
VIN= VOUT+1.3V
53
uA
Line Regulation
∆VOUT
IOUT =0mA
VOUT+1.3V ≤VIN≤18V
2
Page3
www.belling.com.cn
10
mV
V1.0
BL9118
Ripple Rejection Rate
PSRR
VIN =4.2V
+1Vp-pAC
IOUT=100mA,1kHZ
70
IOUT=200mA,1kHZ
68
IOUT=500mA,1kHZ
61
dB
BL9118-1.8V
(VIN= VOUT+1.2V，CIN=CL=10uF，Ta=25OC, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Output Voltage
VOUT(E)
(Note 2)
IOUT=10mA,
VIN= VOUT+1.2V
X 0.98
VOUT (T)
(Note 1)
X 1.02
V
Maximum Output
Current
IOUTMAX
VIN= VOUT+1.2V
800
Load Regulation
∆VOUT
VIN= VOUT+1.2V ,
1mA≤IOUT≤800mA
5
VDIF1
IOUT =100mA
115
mV
mA
10
mV
Dropout Voltage
(Note 3)
VDIF2
IOUT =400mA
450
mV
VDIF3
IOUT =800mA
940
mV
Quiescent Current
Iss
VIN= VOUT+1.2V
52
uA
Line Regulation
∆VOUT
IOUT =0mA
VOUT+1.2V ≤VIN≤18V
2
Ripple Rejection Rate
PSRR
VIN =4.8V
+1Vp-pAC
IOUT=100mA,1kHZ
70
IOUT=200mA,1kHZ
68
IOUT=500mA,1kHZ
61
10
mV
dB
BL9118-2.5V
(VIN= VOUT+1.2V，CIN=CL=10uF，Ta=25OC, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Output Voltage
VOUT(E)
(Note 2)
IOUT=10mA,
VIN= VOUT+1.2V
X 0.98
VOUT (T)
(Note 1)
X 1.02
V
Maximum Output
Current
IOUTMAX
VIN= VOUT+1.2V
1000
Load Regulation
∆VOUT
VIN= VOUT+1.2V ,
1mA≤IOUT≤1000mA
5
VDIF1
IOUT =100mA
90
mV
mA
10
mV
Dropout Voltage
(Note 3)
VDIF2
IOUT =500mA
450
mV
VDIF3
IOUT =1000mA
990
mV
Quiescent Current
Iss
VIN= VOUT+1.2V
53
uA
Line Regulation
∆VOUT
IOUT =0mA
VOUT+1.2V ≤VIN≤18V
2
Page4
www.belling.com.cn
10
mV
V1.0
BL9118
Ripple Rejection Rate
PSRR
VIN =5.5V
+1Vp-pAC
IOUT=100mA,1kHZ
70
IOUT=200mA,1kHZ
68
IOUT=500mA,1kHZ
61
dB
Note ：
1. VOUT (T) ：Specified Output Voltage
2.VOUT (E) ：Effective Output Voltage ( ie. The output voltage when “VOUT (T)+1.2V”is provided at the Vin pin while
maintaining a certain Iout value.)
3.VDIF：VIN1 –VOUT (E)’
VIN1 ：The input voltage when VOUT(E)’ appears as input voltage is gradually decreased.
VOUT (E)’=A voltage equal to 98% of the output voltage whenever an amply stabilized Iout and {VOUT
(T)+1.2V} is input.
Type Characteristics
（1） Output Voltage VS. Output Current
BL9118-1.2V（VIN=VOUT+1.3V）
BL9118-1.8V（VIN=VOUT+1.2V）
Output Voltage VS.Output Current
1.23
1.85
1.22
1.83
O utput V olta ge (V )
O u tp u t V o lta g e (V )
Output Voltage VS.Output Current
1.21
1.20
1.19
1.18
1.17
1.16
1.81
1.79
1.77
1.75
1.73
1.71
0
200
400
600
800
1000
Output Current(mA)
0
200
400
600
800
1000
Output Current(mA)
BL9118-2.5V（VIN=VOUT+1.2V）
Page5
www.belling.com.cn
V1.0
BL9118
Output Voltage VS.Output Current
O u tp u t V o l ta g e (V )
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
0
200
400
600
800
1000
Output Current(mA)
（2） Output Voltage VS. Temperature
BL9118-1.2V（VIN=VOUT+1.3V , IOUT=10mA）
BL9118-1.8V（VIN=VOUT+1.2V , IOUT=10mA）
Output Voltage VS. Temperature
1.24
1.85
1.22
1.83
O u tp u t V o ltag e(V)
O u tp u t V o lta g e (V )
Output Voltage VS. Temperature
1.20
1.18
1.16
1.14
1.12
1.81
1.79
1.77
1.75
1.73
0
30
60
90
120
150
Temperature(℃ )
0
30
60
90
120
Temperature( ℃ )
BL9118-2.5V（VIN=VOUT+1.2V , IOUT=10mA）
Page6
www.belling.com.cn
V1.0
150
BL9118
Output Voltage VS. Temperature
O u tp u t V o lta g e (V )
2.54
2.52
2.50
2.48
2.46
2.44
2.42
0
30
60
90
120
150
Temperature(℃ )
（3）Droput Voltage VS. Output Current（Ta = 25 °C ）
BL9118-1.2V
BL9118-1.8V
Dropout Voltage VS.Output Current
Dropout Voltage VS.Output Current
1000
D ropout Volta ge (m V)
D ro p o u t V o l ta g e (m V )
1400
1200
1000
800
600
400
200
0
800
600
400
200
0
0
100
200
300
400
500
600
700
800
Output Current(mA)
0
100
200
300
400
500
600
700
Output Current(mA)
BL9118-2.5V
Dropout Voltage VS.Output Current
D r o p o u t V o l ta g e (m V )
1200
1000
800
600
400
200
0
0
100 200 300
400 500 600 700 800 900 1000
Output Current(mA)
（4）Ripple Rejection vs. Frequency（Io=100mA）
Page7
www.belling.com.cn
V1.0
800
BL9118
BL9118-1.2V
BL9118-1.8V
Ripple Rejection VS.Frequency
Ripple Rejection VS.Frequency
90
R ipple R e je c tion(dB )
R ipple R e je c tion(dB )
90
80
70
60
50
40
30
80
70
60
50
40
30
10
100
1000
10000
10
100
Frequency(Hz)
1000
10000
Frequency(Hz)
BL9118-2.5V
Ripple Rejection VS.Frequency
R ipple R e je c tion(dB )
90
80
70
60
50
40
30
10
100
1000
10000
Frequency(Hz)
（5）Output Voltage VS. Input Voltage（Ta = 25 °C ）
BL9118-1.2V
BL9118-1.8V
Output Voltage VS.Input Voltage
Output Voltage VS.Input Voltage
1.89
1.86
1.21
Output Voltage(V)
O u t p u t V o lta g e (V )
1.22
1.20
1.19
1.18
1.17
1.16
1.83
1.80
1.77
1.74
1.15
2
4
6
8
10
12
14
16
18
1.71
Input Voltage(V)
Page8
2
4
6
8
10
12
14
16
Input Voltage(V)
www.belling.com.cn
V1.0
18
BL9118
BL9118-2.5V
Output Voltage VS.Input Voltage
2.53
O u tp u t V o l ta g e (V )
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2
4
6
8
10
12
14
16
18
Input Voltage(V)
（6）Quiescent Current VS. Iutput Voltage
BL9118-1.2V
BL9118-1.8V
Quiescent Current VS. Input Voltage
60
Q u i e s c e n t C u r r e n t(u A )
Q u i e s c e n t C u rr e n t(u A )
Quiescent Current VS. Input Voltage
55
50
45
40
35
30
25
2
4
6
8
10
12
14
16
63
58
53
48
43
38
33
28
18
Input Voltage(V)
2
4
6
8
10
12
14
16
18
Input Voltage(V)
BL9118-2.5V
Q u i e s c e n t C u r r e n t(u A )
Quiescent Current VS. Input Voltage
65
60
55
50
45
40
35
30
2
4
6
8
10
12
14
16
18
Input Voltage(V)
Page9
www.belling.com.cn
V1.0
BL9118
Applications Information
1. Input Bypass Capacitor
An input capacitor is recommended.A 10uF tantalum on the input is a suitable input bypassing for almost all
applications.
2. Output Capacitor
The output capacitor is critical in maintaining regulator stability,and must meet the required conditions for both
minimum amount of capacitance and ESR (Equivalent Series Resistance).The minimum output capacitance
required by the BL9118 is 10µF,if a tantalum capacitor is used.Any increase of the output capacitance will merely
improve the loop stability and transient response.The ESR of the output capacitor should be less than 0.5Ω .
3. Load Regulation
The BL9118 regulates the voltage that appears between its output and ground pins,or between its output and
adjust pins. In some cases, line resistances can introduce errors to the voltage across the load. To obtain the
best load regulation, a few precautions are needed. Figure1, shows a typical application using a fixed output
regulator.The Rt1 and Rt2 are the line resistances.It is obvious that the VLOAD is less than the VOUT by the sum of
the voltage drops along the line resistances. In this case, the load regulation seen at the RLOAD would be
degraded from the datasheet specification. To improve this , the load should be tied directly to the output terminal
on the positive side and directly tied to the ground terminal on the negative side.
FIGURE 1. Typical Application using Fixed Output Regulator
Application Circuit
（1）Regulator with Reference
（2）Adjusting Output of Fixed Voltage Regulators
（3）Battery Backed−Up Power Supply
Page10
www.belling.com.cn
V1.0
BL9118
（4）Low Dropout Negative Supply
Packaging Information
● SOT223
Page11
www.belling.com.cn
V1.0
BL9118
Page12
www.belling.com.cn
V1.0