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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Hand-Held Instruments
PCMCIA Cards

MP3/MP4/MP5 Players

Ultra-low Noise for RF Application
Step-Down
Converter

Portable
Information Appliances

Ultra-Fast Response in Line/Load
,
Transient
DESCRIPTION

<0.01A
Standby
Current
When
Shutdown.
The BL9198 is designed for portable RF and

Low Dropout:[email protected]
wireless applications with demanding perfor
Wide Operating Voltage Ranges:2V to
mance and space requirements. The BL9198
6V
performance is optimized for battery-powered

TTL-logic-Controlled Shutdown Input
systems to deliver ultra low noise and low

Low Temperature Coefficient
quiescent current. Regulator ground current

Current Limiting Protection
increases only slightly in dropout, further

Thermal Shutdown Protection
prolonging the battery life. The BL9198 also

Only 1F Output Capacitor Required for
works with low-ESR ceramic capacitors,
Stability
reducing the amount of board space

High Power Supply Rejection Ratio
necessary for power applications, critical in

Custom Voltage Available
hand-held wireless devices. The BL9198

Fast output discharge
consumes less than 0.01μA in shutdown

Available in 5-Lead SOT-23 and SC-70
mode and has fast turn-on time less than
Package
50μs. The other features include ultra low
dropout voltage, high output accuracy,
APPLICATIONS
current limiting protection, and high ripple
rejection ratio. Available in the 5-lead SC-70

Cellular and Smart Phones
and SOT-23 packages.

Battery-Powered Equipment

Laptop, Palmtops, Notebook Computers
FEATURES


ORDERING INFORMATION
TYPICAL APPLICATION
BL9198 XX X X X XXX
BL9198 28 AA
Package:
RN: SOT-23-5
URN: SC-70-5
Features
P: Standard (default, lead free)
C: Customized
VIN
1
C1
1uF
2
Chip
Enable
Enable Option:
A: active high with internal 8 MΩ pull down
B: active low with internal 8 MΩ pull up
Output Voltage Accuracy
A: ±1%
B: ±2%
Output Voltage:
12: 1.2V 13:1.3V 15: 1.5V 18:1.8V
25:2.5V 27:2.7V 28:2.8V 285: 2.85V
30: 3.0V 32:3.2V 33:3.3V 50:5.0V
CT: custom fixed output (50mV step)
PPMIC BU
BL9198 Rev 2.0
8/2014
VIN
VOUT
5
VOUT
C2
1uF
GND
BL9198
3
EN
NC
4
Application hints:
Output capacitor (C2≥2.2uF) is recommended
in BL9198-1.2V, BL9198-1.3V, BL9198-1.5V
and BL9198-1.8V application to assure the
stability of circuit.
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1
BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Absolute Maximum Rating
Input Supply Voltage (VIN)
EN Pin Input Voltage
Output Voltages
Output Current
(Note 1)
-0.3V to +6V
Maximum Junction Temperature
150°C
(Note2)
-0.3V to VIN
Operating Temperature Range
-40°C to 85°C
Step-Down
Converter
-0.3V to VIN+0.3V
Storage Temperature Range
-65°C to 125°C
300mA
Lead Temperature (Soldering, 10s)
300°C,
Package Information
Thermal Resistance (Note 4):
Package
SOT23-5
SC70-5
SOT23-5/SC70-5
TOP VIEW
VIN
1
Part Number
VOUT
4
NC
3
Top Mark
Temp Range
(Note3)
BL9198-12
DAYW
BL9198-13
DBYW
-40°C to +85°C
BL9198-15
DCYW
-40°C to +85°C
BL9198-18
DDYW
-40°C to +85°C
BL9198-25
DEYW
-40°C to +85°C
BL9198-27
DFYW
-40°C to +85°C
BL9198-28
DGYW
-40°C to +85°C
BL9198-285
DHYW
-40°C to +85°C
BL9198-30
DIYW
-40°C to +85°C
BL9198-32
DJYW
-40°C to +85°C
BL9198-33
DKYW
-40°C to +85°C
BL9198-50
DLYW
-40°C to +85°C
A
1.2V
Y
Year
B
1.3V
C
1.5V
-40°C to +85°C
D
1.8V
E
2.5V
F
2.7V
G
2.8V
9
2009
0
2010
1
2011
2
2012
3
2013
A
1
…
…
Y
25
Z
26
a
27
W
Week
ӨJC
130°C/W
170°C/W
MARKING
GND 2
EN
5
ӨJA
250C/W
333C/W
H
2.85V
…
…
I
3.0V
y
51
J
3.2V
K
3.3V
L
5.0V
z
52
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2: The BL9198 is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the –40°C
to 85°C operating temperature range are assured by design, characterization and correlation with statistical
process controls.
Note 3: D: Product code of BL9198 A-L: Voltage code Y: Year of wafer manufacturing W: Week of wafer manufacturing.
Note 4: Thermal Resistance is specified with approximately 1 square of 1 oz copper.
PPMIC BU
BL9198 Rev 2.0
8/2014
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Pin Description
Step-Down Converter
PIN
1
2
NAME
VIN
GND
3
EN
4
5
NC
VOUT
FUNCTION
Power Input Voltage.
Ground.
Chip Enable Pin with two options.
A: active high with internal 8 MΩ pull down
B: active low with internal 8 MΩ pull up
No Connection.
Output Voltage.
,
Block Diagram
VIN
VIN
Quick
Start
Quick
Start
- Error
Amplifier
+
VREF
+
VOUT
Current Limit
And
Thermal
Protection
EN
VREF
GND
-
Error
Amplifier
VOUT
Current Limit
And
Thermal
Protection
EN
GND
BL9198 XX XA
BL9198 XX XB
PPMIC BU
BL9198 Rev 2.0
8/2014
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Electrical Characteristics (Note 5)
(VIN=3.6V, EN=VIN, CIN=COUT=1F, TA=25℃, unless otherwise noted.)
Parameter
Symbol
Conditions
MIN
TYP
Step-Down
Converter
Input Voltage
VIN
2
Output Voltage Accuracy
-1
VIN=3.6V,
VOUT
(Note 6)
IOUT=1mA
-2
Current Limit
ILIM
400
430
RLOAD=1
Quiescent Current
IQ
VEN>1.2V, IOUT=0mA
90
IOUT=200mA,
130
VOUT=2.8V
Dropout Voltage
VDROP
IOUT=300mA,
210
VOUT=2.8V
VIN=3.6V to 5.5V
(Note 7)
ΔVLINE
0.05
Line Regulation
IOUT=1mA
(Note 8)
ΔVLOAD
1mA<IOUT<300mA
Load Regulation
(Note 9)
Output Voltage
TCVOUT
IOUT=1mA
±60
Temperature Coefficient
VEN=GND,
Standby Current
ISTBY
0.01
Shutdown
EN Input Bias Current
IIBSD
VEN=GND or VIN
VIN=3V to 5.5V,
Logic Low
VIL
EN
Shutdown
Input
VIN=3V to 5.5V,
Threshold
Logic High
VIH
1.2
Start up
Output Noise
10Hz to100KHz,
eNO
100
Voltage
IOUT=200mA
Power
f=217Hz
-78
Supply
f=1KHz
PSRR
IOUT=100mA
-72
Rejection
f=10KHz
-52
Ratio
Thermal Shutdown
Shutdown, Temp
TSD
165
Temperature
increasing
Thermal Shutdown
TSDHY
30
Hysteresis
MAX
6
+1
+2
unit
V
,
%
mA
A
130
180
mV
300
0.17
%/V
2
%/A
ppm/℃
1
A
500
nA
0.4
V
V
VRMS
dB
℃
℃
Note 5: 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and
characterization.
Note 6: This IC includes two kinds of output voltage accuracy versions. A: ±1%, B: ±2%.
 VOUT 1  VOUT 2
 V  V
OUT ( normal )
 IN
Note 7: Line regulation is calculated by V
LINE  

  100

Where VOUT1 is the output voltage when VIN=5.5V, and VOUT2 is the output voltage when VIN=3.6V,
△VIN=1.9V . VOUT (normal) =2.8V.
 VOUT 1  VOUT 2 
Note 8: Load regulation is calculated by V
 100
LOAD  
 I  V
 OUT OUT ( normal ) 
Where VOUT1 is the output voltage when IOUT=1mA, and VOUT2 is the output voltage when IOUT=300mA. △IOUT=0.299A,
VOUT(normal)=2.8V.
Note 9: The temperature coefficient is calculated by TC
VOUT 
PPMIC BU
BL9198 Rev 2.0
8/2014
VOUT
T  VOUT
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Typical Performance Characteristics
Output Voltage Vs. Temperature
Quiescent Current Vs. Temperature
Step-Down
Converter
140
3.0
VIN=3.6V
Output Voltage(V)
Quiescent Current(uA)
CIN=COUT=1uF
2.9
2.8
2.7
,
VIN=3.6V
CIN=COUT=1uF
130
120
110
100
90
80
2.6
70
2.5
-50
-25
0
25
50
75
100
60
-50
125
-25
0
25
50
Dropout Voltage Vs. Load Current
125
PSRR
CIN=COUT=1uF
250
VIN=4.2V
CIN=1uF,COUT=1uF,X7R
-10
ILOAD=1mA
ILOAD=100mA
ILOAD=200mA
-20
-30
200
PSRR(dB)
Dropout Voltage(mV)
100
0
300
150
100
-40
-50
-60
TJ=85C
TJ=25C
TJ=-40C
50
-70
-80
0
0
50
100
150
200
250
300
-90
10
100
Load Current(mA)
1000
10000
100000
Frequency(Hz)
EN Pin Shutdown Threshold Vs. Temperature
Current Limit Vs. Input Voltage
500
1.05
VIN=3.6V
1.00
480
CIN=COUT=1uF
CIN=COUT=1uF
VOUT=2.8V
460
Current Limit(mA)
EN Pin Shutdown Threshold(V)
75
Temperature(C)
Temperaute(C)
0.95
0.90
0.85
440
420
400
380
360
0.80
340
320
0.75
-50
-25
0
25
50
Temperature(C)
PPMIC BU
BL9198 Rev 2.0
8/2014
75
100
125
300
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage(V)
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Step-Down Converter
,
PPMIC BU
BL9198 Rev 2.0
8/2014
www.belling.com.cn
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Output Voltage(V)
VOUT Vs.VIN
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.0
CIN=COUT=1uF
Step-Down Converter
,
ILoad=1mA
ILoad=100mA
ILoad=300mA
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage(V)
PPMIC BU
BL9198 Rev 1.9
3/2011
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
down mode when the voltage on the EN
pin falls below 0.4 volts. For to protect the
system, the BL9198 have a quick disLike any low-dropout regulator, the exStep-Down
Converter
charge function. If the enable function is
ternal capacitors used with the BL9198
not needed in a specific application, it may,
must be carefully selected for regulator
be tied to VIN to keep the LDO regulator in
stability and performance. Using a capaca continuously on state.
itor whose value is > 1μF on the BL9198
input and the amount of capacitance can
Thermal Considerations
be increased without limit. The input capacitor must be located a distance of not
Thermal protection limits power dissipation
more than 0.5 inch from the input pin of the
in BL9198. When the operation junction
IC and returned to a clean analog ground.
temperature exceeds 165°C, the OTP
Any good quality ceramic or tantalum can
circuit starts the thermal shutdown function
be used for this capacitor. The capacitor
turn the pass element off. The pass
with larger value and lower ESR (equielement turns on again after the junction
valent series resistance) provides better
temperature cools by 30°C.
PSRR and line-transient response. The
For continue operation, do not exceed
output capacitor must meet both requiabsolute maximum operation junction
rements for minimum amount of capatemperature 125°C. The power dissipation
citance and ESR in all LDOs application.
definition in device is:
The BL9198 is designed specifically to
work with low ESR ceramic output capaPD(MAX) = ( TJ(MAX) − TA ) /θJA
citor in space-saving and performance
consideration. Using a ceramic capacitor
Where TJ(MAX) is the maximum operation
whose value is at least 1μF with ESR is >
junction temperature 125°C, TA is the
25mΩ on the BL9198 output ensures
ambient temperature and the θJA is the
stability. The BL9198 still works well with
junction to ambient thermal resistance. For
output capacitor of other types due to the
recommended operating conditions spewide stable ESR range. Output capacitor of
cification of BL9198, where TJ(MAX) is the
larger capacitance can reduce noise and
maximum junction temperature of the die
improve load transient response, stability,
(125°C) and TA is the maximum ambient
and PSRR. The output capacitor should be
temperature. The junction to ambient thelocated not more than 0.5 inch from the
rmal resistance (θJA is layout dependent)
VOUT pin of the BL9198 and returned to a
for SOT-23-5 package is 250°C/W, SC-70clean analog ground.
5 package is 333°C/W, on standard
JEDEC 51-3 thermal test board. The maxEnable Function
imum power dissipation at TA= 25°C can
be calculated by following formula:
The BL9198 features an LDO regulator enable/disable function. To assure the LDO
PD(MAX) = (125°C−25°C)/333 = 300mW
regulator will switch on; the EN turn on
(SC-70-5)
control level must be greater than 1.2 volts.
The LDO regulator will go into the shut-
Applications Information
PPMIC BU
BL9198 Rev 1.9
3/2011
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
PD(MAX) = (125°C−25°C)/250 = 400mW
(SOT-23-5)
Step-Down Converter
The maximum power dissipation depends
on operating ambient temperature for fixed
TJ(MAX) and thermal resistance θJA. It is
also useful to calculate the junction of
temperature of the BL9198 under a set of
specific conditions. In this example let the
Input voltage VIN=3.3V, the output current
Io=300mA and the case temperature
TA=40°C measured by a thermal couple
during operation. The power dissipation for
the VOUT=2.8V version of the BL9198 can
be calculated as:
,
PD = (3.3V−2.8V) ×300mA+3.6V×100uA
=150mW
And the junction temperature, TJ, can be
calculated as follows:
TJ=TA+PD×θJA=40°C+0.15W×250°C/W
=40°C+37.5°C=77.5°C<TJ(MAX) =125°C
For this operating condition, TJ is lower
than the absolute maximum operating
junction temperature,125°C, so it is safe to
use the BL9198 in this configuration.
Layout considerations
To improve ac performance such as PSRR,
output noise, and transient response, it is
recommended that the PCB be designed
with separate ground planes for VIN and
VOUT, with each ground plane connected
only at the GND pin of the device.
PPMIC BU
BL9198 Rev 1.9
3/2011
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
BL9198-2.8V Layout Circuit
VIN
VIN
1
C4
1uF
C1
1uF 2
JP
1
2
3
3
1
VIN
BL9198 Rev 1.9
3/2011
VOUT
5
Step-Down Converter
BL9198
C2
1uF
GND
EN
VOUT
NC
,
4
2
3
TOP Layer Layout
PPMIC BU
VIN
BOTTOM Layer Layout
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Package Description
Step-Down Converter
,
Symbol
A
A1
B
b
C
D
e
H
L
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
0.800
0.000
1.150
0.150
1.800
1.800
1.100
0.100
1.350
0.400
2.450
2.250
0.031
0.000
0.045
0.006
0.071
0.071
0.044
0.004
0.054
0.016
0.096
0.089
0.650
0.080
0.210
0.026
0.260
0.460
0.003
0.008
0.010
0.018
SC-70-5 Surface Mount Package
PPMIC BU
BL9198 Rev 1.9
3/2011
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Package type
SC70-5
Tape dimension
Number of devices per reel
3000
Step-Down Converter
,
Taping reel dimension
PPMIC BU
BL9198 Rev 1.9
3/2011
www.belling.com.cn
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Step-Down Converter
,
Symbol
A
A1
B
b
C
D
e
H
L
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
0.889
0.000
1.397
0.356
2.591
2.692
0.838
0.080
0.300
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
0.035
0.000
0.055
0.014
0.102
0.106
0.033
0.003
0.012
0.051
0.006
0.071
0.022
0.118
0.122
0.041
0.010
0.024
SOT-23-5 Surface Mount Package
PPMIC BU
BL9198 Rev 1.9
3/2011
www.belling.com.cn
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BL9198
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
Package type
SOT23-5
Number of devices per reel
Tape dimension(Default: Type I)
3000
Step-Down Converter
,
Type I
Type II
Taping reel dimension
PPMIC BU
BL9198 Rev 1.9
3/2011
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