LESHAN RADIO COMPANY, LTD.
300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
LR9198
Hand-Held Instruments
PCMCIA Cards
MP3/MP4/MP5 Players
Portable Information Appliances
FEATURES
Ultra-low Noise for RF Application
Ultra-Fast Response in Line/Load
Transient
<0.01µA
Standby
Current
When
Shutdown.
Low Dropout:210mV@300mA
Wide Operating Voltage Ranges:2V to
6V
TTL-logic-Controlled Shutdown Input
Low Temperature Coefficient
Current Limiting Protection
Thermal Shutdown Protection
Only 1µF Output Capacitor Required for
Stability
High Power Supply Rejection Ratio
Custom Voltage Available
Fast output discharge
Available in 5-Lead SOT-23 and SC-70
Package
DESCRIPTION
The LR9198 is designed for portable RF and
wireless applications with demanding perfor-
mance and space requirements. The LR9198
performance is optimized for battery-powered
systems to deliver ultra low noise and low
quiescent current. Regulator ground current
increases only slightly in dropout, further
prolonging the battery life. The LR9198 also
works with low-ESR ceramic capacitors,
reducing the amount of board space
necessary for power applications, critical in
hand-held
wireless devices. The LR9198
consumes less than 0.01µA in shutdown
mode and has fast turn-on time less than
50µs. The other features include ultra low
dropout voltage, high output accuracy,
current limiting protection, and high ripple
rejection ratio. Available in the 5-lead SC-70
and SOT-23 packages.
APPLICATIONS
Cellular and Smart Phones
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
ORDERING INFORMATION
LR9198
XX X X X XXX
Package:
RN: SOT-23-5
URN: SC-70-5
Features
P: Standard (default, lead free)
C: Customized
TYPICAL APPLICATION
LR9198 28 AA
VIN
CIN
2
3
1
VIN
GND
EN
NC
4
VOUT
5
VOUT
COUT
LR9198
Enable Option:
A: active high with internal 8 M pull down
B: active low with internal 8 M pull up
Output Voltage Accuracy
A: ±1%
B: ±2%
Output Voltage:
12: 1.2V 15: 1.5V 18:1.8V 25:2.5V
28: 2.8V 30: 3.0V 33:3.3V 50:5.0V
CT: custom fixed output (50mV step)
Chip Enable
Application hints:
Output capacitor (COUT≥2.2uF) is
recommended in LR9198-1.2V application to
assure the stability of circuit.
1
LESHAN RADIO COMPANY, LTD.
Absolute Maximum Rating
Input
Supply Voltage (V
IN
)
EN Input Voltage
Output Voltage
Output Current
(Note 1)
-0.3V to +6V
-0.3V to +V
IN
-0.3V to V
IN
+0.3V
300mA
Maximum Junction Temperature
125°C
(Note2)
Operating Temperature Range
-40°C to 85°C
Storage Temperature Range
-65°C to 125°C
Lead Temperature (Soldering, 10s)
300°C
Package Information
SOT23- SC70-
SOT23-5/SC70-5
23
70
TOP VIEW
VIN
1
MARKING
5
VOUT
GND 2
EN
3
4
NC
Part Number
LR9198-12
LR9198-15
LR9198-18
LR9198-25
LR9198-28
LR9198-30
LR9198-33
LR9198-50
Top Mark
EAYW
EBYW
ECYW
EDYW
EEYW
EFYW
EGYW
EIYW
(Note3)
Temp Range
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Thermal Resistance
(Note 4)
Package
SOT23-5
SC70-5
Ө
JA
250°C/W
333°C/W
Ө
JC
130°C/W
170°C/W
Note 1:
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2:
The LR9198 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:
X: Product Code(LR9198:E) V: Voltage Code(1.2V:A, 1.5V:B, 1.8V:C, 2.5V:D, 2.8V:E, 3.0V:F, 3.3V:G, 5.0V:I) Y:
Year of manufacturing(9:2009) W: Week of manufacturing(W:A-Z, a-z).
Note 4:
Thermal Resistance is specified with approximately 1 square of 1 oz copper.
2
LESHAN RADIO COMPANY, LTD.
Electrical Characteristics
(Note 5)
(V
IN
=3.6V, EN=V
IN,
C
IN
=C
OUT
=1
µF,
T
A
=25℃, unless otherwise noted.)
Parameter
Symbol
Conditions
MIN
Input Voltage
V
IN
2
Output Voltage Accuracy
-1
V
IN=
3.6V,
∆V
OUT
(Note 6)
I
OUT
=1mA
-2
Current Limit
I
LIM
400
R
LOAD
=1Ω
Quiescent Current
I
Q
V
EN
>1.2V, I
OUT
=0mA
I
OUT
=200mA,
V
OUT
=2.8V
Dropout Voltage
V
DROP
I
OUT
=300mA,
V
OUT
=2.8V
V
IN
=3.6V to 5.5V
(Note 7)
∆V
LINE
Line Regulation
I
OUT
=1mA
(Note 8)
∆V
LOAD
1mA<I
OUT
<300mA
Load Regulation
(Note 9)
Output Voltage
TC
VOUT
I
OUT
=1mA
Temperature Coefficient
V
EN
=GND,
Standby Current
I
STBY
Shutdown
EN Input Bias Current
I
IBSD
V
EN
=GND or V
IN
V
IN
=3V to 5.5V,
EN
Logic Low
V
IL
Shutdown
Input
V
IN
=3V to 5.5V,
Threshold
Logic High
V
IH
1.2
Start up
Output Noise
10Hz to100KHz,
e
NO
Voltage
I
OUT
=200mA
Power
f=217Hz
Supply
PSRR
I
OUT
=100mA
f=1KHz
Rejection
f=10KHz
Ratio
Thermal Shutdown
Shutdown, Temp
T
SD
increasing
Temperature
Thermal Shutdown
T
SDHY
Hysteresis
TYP
MAX
6
+1
+2
130
180
mV
210
0.05
300
0.17
2
±60
0.01
1
500
0.4
%/V
%/A
ppm/℃
µA
nA
V
V
100
-78
-72
-52
165
30
℃
℃
dB
µV
RMS
unit
V
%
mA
µA
430
90
130
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%.
Note 7:
Line regulation is calculated by
∆
V
LINE
=
V
OUT
1
−
V
OUT
2
∆
V
IN
×
V
OUT
(
normal
)
×
100
Where V
OUT1
is the output voltage when V
IN
=5.5V, and V
OUT2
is the output voltage when V
IN
=3.6V,
△V
IN
=1.9V . V
OUT
(normal) =2.8V.
V
OUT
1
−
V
OUT
2
Note 8:
Load regulation is calculated by
∆
V
×
100
LOAD
=
∆
I
×
V
OUT
OUT
(
normal
)
Where V
OUT1
is the output voltage when I
OUT
=1mA, and V
OUT2
is the output voltage when I
OUT
=300mA.
△I
OUT
=0.299A,
V
OUT
(normal)=2.8V.
∆
V
OUT
Note 9:
The temperature coefficient is calculated by
TC
V
OUT
=
∆
T
×
V
OUT
4
LESHAN RADIO COMPANY, LTD.
Typical Performance Characteristics
Output Voltage Vs. Temperature
3.0
Quiescent Current Vs. Temperature
140
130
Quiescent Current(uA)
120
110
100
90
80
V
IN
=3.6V
2.9
Output Voltage(V)
C
IN
=C
OUT
=1uF
V
IN
=3.6V
C
IN
=C
OUT
=1uF
2.8
2.7
2.6
70
2.5
-50
-25
0
25
50
75
100
125
60
-50
-25
0
25
50
75
100
125
Temperaute(
°
C
)
Temperature(
°
C)
Dropout Voltage Vs. Load Current
300
0
PSRR
-10
-20
250
Dropout Voltage(mV)
C
IN
=C
OUT
=1uF
V
IN
=4.2V
C
IN
=1uF,C
OUT
=1uF,X7R
I
LOAD
=1mA
I
LOAD
=100mA
I
LOAD
=200mA
200
-30
PSRR(dB)
-40
-50
-60
150
100
50
TJ=85
°
C
TJ=25
°
C
TJ=-40
°
C
0
50
100
150
200
250
300
-70
-80
-90
10
0
100
1000
10000
100000
Load Current(mA)
Frequency(Hz)
EN Pin Shutdown Threshold Vs. Temperature
1.05
500
Current Limit Vs. Input Voltage
480
460
V
IN
=3.6V
1.00
EN Pin Shutdown Threshold(V)
C
IN
=C
OUT
=1uF
Current Limit(mA)
C
IN
=C
OUT
=1uF
V
OUT
=2.8V
0.95
440
420
400
380
360
0.90
0.85
0.80
340
320
0.75
-50
-25
0
25
50
75
100
125
Temperature(
°
C)
300
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage(V)
5
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