RT9198-25GY [RICHTEK]
IC REG LINEAR 2.5V 300MA SC82;
| 型号： | RT9198-25GY |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | IC REG LINEAR 2.5V 300MA SC82 |
| 文件： | 总18页 (文件大小：265K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
RT9198/A
300mA, Low Noise, Ultra-Fast CMOS LDO Regulator
General Description
Ordering Information
RT9198/A-
The RT9198/A is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9198/Aperformance 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 RT9198/A also works with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held wireless
devices. The RT9198/A 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 SOT-23-3, SOT-23-5,
TSOT-23-3, TSOT-23-5, SC-70-5, SC-82, MSOP-8 and
WDFN-6L 2x2 packages, the RT9198/Aalso offers a range
from 1.5V to 5.0V with 0.1V per step.
Package Type
U5 : SC-70-5
U5R : SC-70-5 (R-Type)
Y : SC-82
V : SOT-23-3
B : SOT- 23-5
BR : SOT- 23-5 (R-Type)
BG : SOT- 23-5 (G-Type)
J3 : TSOT- 23-3
J5 : TSOT- 23-5
J5R : TSOT- 23-5 (R-Type)
J5G : TSOT- 23-5 (G-Type)
F : MSOP-8
QW : WDFN-6L 2x2 (W-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
1H : 1.85V
2H : 2.85V
4G : 4.75V
Features
Low-Noise for RF Application
Fast Response in Line/Load Transient
Quick Start-Up (Typically 50μs)
Chip Enable Function (Active Low)
Chip Enable Function (Active High)
< 0.01μA Standby Current When Shutdown
Low Dropout : 220mV @ 300mA
Wide Operating Voltage Ranges : 2.5V to 5.5V
TTL-Logic-Controlled Shutdown Input
Low Temperature Coefficient
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Current Limiting Protection
Thermal Shutdown Protection
Suitable for use in SnPb or Pb-free soldering processes.
Only 1μF Output Capacitor Required for Stability
High Power Supply Rejection Ratio
Custom Voltage Available
Marking Information
RoHS Compliant and 100% Lead (Pb)-Free
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Applications
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable InformationAppliances
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9198/A-15 July 2015
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1
RT9198/A
Pin Configurations
(TOP VIEW)
VOUT
NC
VIN
VOUT
NC
VOUT
VIN
5
4
5
4
5
4
3
2
3
2
3
2
3
2
VIN GND
EN/EN
VOUT
GND VIN
GND
NC GND
EN/EN
EN/EN
TSOT-23-5/SOT-23-5/
SC-70-5 (R-Type)
TSOT-23-5/SOT-23-5/
SC-70-5
TSOT-23-5/
TSOT-23-3/
SOT-23-3
SOT-23-5(G-Type)
VIN
VOUT
8
NC
EN/EN
NC
NC
4
3
1
2
3
6
5
4
EN/EN
GND
VIN
NC
2
3
4
NC
GND
VIN
7
6
5
NC
VOUT
2
7
VOUT
GND
EN/EN
WDFN-6L 2x2
MSOP-8
SC-82
Typical Application Circuit
RT9198
VIN
VOUT
V
OUT
V
IN
C
IN
C
OUT
1uF
1uF
Chip Enable
On
EN
GND
Off
RT9198A
VIN
VOUT
V
OUT
V
IN
C
IN
C
OUT
1uF
1uF
Chip Enable
Off
GND
EN
On
Copyright 2015 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
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2
DS9198/A-15 July 2015
RT9198/A
Functional Pin Description
Pin Name
Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low
100k resistor connected to GND when the control signal is floating.
EN
Chip Enable (Active Low). Note that this pin is high impedance. There should be a pull high
100k resistor connected to VIN when the control signal is floating.
EN
NC
No Internal Connection.
Ground. The exposed pad must be soldered to a large PCB and connected to GND for
maximum power dissipation.
GND, Exposed Pad
VOUT
VIN
Output Voltage.
Input Voltage.
Function Block Diagram
EN/EN
Shutdown
and
VIN
Logic Control
V
REF
-
MOS Driver
Error
Amplifier
VOUT
GND
Current-Limit
and
Thermal
Protection
Copyright 2015 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS9198/A-15 July 2015
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3
RT9198/A
Absolute Maximum Ratings (Note 1)
Supply Input Voltage------------------------------------------------------------------------------------------------------ 6V
Power Dissipation, PD @ TA = 25°C
TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5 ------------------------------------------------------------------------- 400mW
SC-70-5, SC-82 ------------------------------------------------------------------------------------------------------------ 300mW
MSOP-8 --------------------------------------------------------------------------------------------------------------------- 625mW
WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 606mW
Package Thermal Resistance (Note 2)
TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5, θJA -------------------------------------------------------------------- 250°C/W
TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5, θJC ------------------------------------------------------------------- 135°C/W
SC-70-5, SC-82, θJA ------------------------------------------------------------------------------------------------------ 333°C/W
MSOP-8, θJA ---------------------------------------------------------------------------------------------------------------- 160°C/W
WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------- 165°C/W
WDFN-6L 2x2, θJC -------------------------------------------------------------------------------------------------------- 20°C/W
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model)---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Supply Input Voltage------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
EN Input Voltage ----------------------------------------------------------------------------------------------------------- 0V to 5.5V
Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1μF, TA = 25°C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Current Limit
Symbol
VOUT
ILIM
Test Conditions
IOUT = 1mA
Min
2
Typ
--
Max Unit
+2
--
%
RLOAD = 1
360
400
mA
RT9198, VEN ≧ 1.2V, IOUT = 0mA
RT9198A, VEN ≦ 0.4V,IOUT = 0mA
IOUT = 200mA
Quiescent Current
IQ
--
90
130
A
--
--
170
220
200
330
Dropout Voltage
(Note 5)
VDROP
VLINE
mV
IOUT = 300mA
VIN = (VOUT + 1V) to 5.5V,
IOUT = 1mA
Line Regulation
--
--
--
--
--
--
0.3
0.6
1
%
%
Load Regulation
Shutdown Current
EN Input Bias Current
VLOAD 1mA < IOUT < 300mA
RT9198, VEN = GND, Shutdown
ISHDN
0.01
0
A
nA
RT9198A, VEN = VIN, Shutdown
IIBEN
VEN = GND or VIN
100
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DS9198/A-15 July 2015
RT9198/A
Parameter
Logic-Low
Symbol
Test Conditions
Min
Typ
Max Unit
RT9198, VIN = 3V to 5.5V, Shutdown
RT9198A, VIN = 3V to 5.5V, Enable
VIL
--
--
0.4
V
Voltage
EN Threshold
Logic-High
Voltage
RT9198, VIN = 3V to 5.5V, Enable
RT9198A, VIN = 3V to 5.5V, Shutdown
VIH
1.2
--
--
f = 100Hz
f = 10kHz
--
--
60
30
--
Power Supply
Rejection Rate
PSRR
COUT = 1F, IOUT = 100mA
dB
--
Thermal Shutdown
Temperature
Thermal Shutdown
Temperature Hysteresis
TSD
--
--
165
30
--
--
C
C
TSD
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect
device reliability.
Note 2. θJA is measured at TA = 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
Copyright 2015 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS9198/A-15 July 2015
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5
RT9198/A
Typical Operating Characteristics
Quiesent Current vs. Temperature
Output Voltage vs. Temperature
100
95
90
85
80
75
70
65
60
2
RT9198/A-15
VIN = 3.3V
CIN = COUT = 1uF
VIN = 5V
CIN = COUT = 1uF
1.9
1.8
No Load
1.7
1.6
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature
Temperature (°C)
(°C)
EN Pin Shutdown Threshold vs. Temperature
Current Limit vs. Input Voltage
1.5
600
550
500
450
400
350
300
RT9198/A-15
VIN = 3.3V
RT9198/A-15
CIN = COUT = 1uF
CIN = COUT = 1uF
1.25
1
0.75
0.5
0.25
-50
-25
0
25
50
75
100
125
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
(°C)
Temperature
Input Voltage (V)
Dropout Voltage vs. Load Current
PSRR
300
250
200
150
100
50
20
0
RT9198/A-33
CIN = COUT = 1uF
VOUT = 2.5V
CIN = COUT = 1uF, X7R
TJ = 125°C
TJ = 25°C
-20
-40
-60
-80
TJ = -40°C
ILOAD = 100mA
ILOAD = 10mA
0
10
1
100
1K
10K
100K
1M
0
0.05
0.1
0.15
0.2
0.25
0.3
Load Current (A)
Frequency (Hz)
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DS9198/A-15 July 2015
RT9198/A
Line Transient Response
Line Transient Response
CIN = COUT = 1uF
ILOAD = 50mA
CIN = COUT = 1uF
ILOAD = 250mA
5
4
3
5
4
3
20
0
50
0
-20
-50
Time (100μs/Div)
Time (100μs/Div)
Load Transient Response
Load Transient Response
VIN = 3.3V
CIN = COUT = 1uF
VOUT = 1.5V
ILOAD= 1mA to 50mA
VIN = 3.3V
CIN = COUT = 1uF
VOUT = 1.5V
ILOAD = 1mA to 250mA
100
400
200
0
50
0
50
0
50
0
-50
-50
Time (100μs/Div)
Time (100μs/Div)
Start Up
EN Pin Shutdown Response
VOUT = 1.8V
ILOAD = 1mA
VOUT = 1.8V
ILOAD = 1mA
RT9198-18, VIN = 5V
CIN = COUT = 1uF
RT9198-18, VIN = 5V
CIN = COUT = 1uF
10
10
5
5
0
0
2
1
0
2
1
0
Time (10μs/Div)
Time (1ms/Div)
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RT9198/A
Noise
Noise
VOUT = 1.8V
ILOAD = 150mA
VOUT = 1.8V
No Load
VIN = 4.5V
CIN = COUT = 1uF
VIN = 4.5V
CIN = COUT = 1uF
400
200
0
400
200
0
-200
-400
-200
-400
f = 10Hz to 100kHz
f = 10Hz to 100kHz
Time (5ms/Div)
Time (5ms/Div)
Copyright 2015 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
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DS9198/A-15 July 2015
RT9198/A
Applications Information
Enable Function
Like any low-dropout regulator, the external capacitors used
for the RT9198/A must be carefully selected for regulator
stability and performance. Using a capacitor whose value
is > 1μF on the RT9198/A input and the amount of
capacitance can be increased without limit. The input
capacitor must be located a distance of not more than
0.5 inch from the input pin of the IC and returned to a
clean analog ground.Any good quality ceramic or tantalum
can be used for this capacitor. The capacitor with larger
value and lower ESR (equivalent series resistance) provides
better PSRR and line-transient response.
The RT9198/Afeatures an LDO regulator enable/disable
function.
To assure the RT9198 LDO regulator will switch on, the
EN turn on control level must be greater than 1.2V. The
RT9198 LDO regulator will go into shutdown mode when
the voltage on the ENpin falls below 0.4V. For RT9198A,
the EN turn on control level must be lower than 0.4V to
assure the RT9198A LDO regulator switch on. The
RT9198A LDO regulator will go into shutdown mode when
the voltage on the ENpin is higher than 1.2V. The RT9198A
equips a quick-discharge function to protect the system.
When the regulator is turned off by EN pin, the internal
MOSFET between VOUT and GND will be turned on to
discharge output voltage quickly. If the enable function is
not needed in a specific application, it may be tied to
GND/VIN to keep the LDO regulator in a continuously on
state.
The output capacitor must meet both requirements for
minimum amount of capacitance and ESR in all LDOs
application. The RT9198/Ais designed specifically to work
with low ESR ceramic output capacitor in space-saving
and performance consideration. Using a ceramic capacitor
whose value is at least 1μF with ESR is more than 20mΩ
on the RT9198/Aoutput ensures stability. The RT9198/A
still works well with output capacitor of other types due to
the wide stable ESR range. Figure 1. shows the curves of
allowable ESR range as a function of load current for various
output capacitor values. Output capacitor of larger
capacitance can reduce noise and improve load transient
response, stability, and PSRR. The output capacitor should
be located with in 0.5 inch from the VOUT pin of the
RT9198/Aand returned to a clean analog ground.
Thermal Considerations
Thermal protection limits power dissipation in RT9198/A.
When the operating junction temperature exceeds 165°C,
the OTP circuit starts the thermal shutdown function and
turns the pass element off. The pass element turns on
again after the junction temperature cools by 30°C.
For continuous operation, do not exceed absolute
maximum operatiog junction temperature 125°C. The
power dissipation definition in device is shown as following
formula :
Region of Stable COUT ESR vs. Load Current
100
Instable
Stable
10
PD = (VIN − VOUT) x IOUT + VIN x IQ
COUT = 1uF
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient. The maximum power dissipation can
be calculated by following formula :
1
0.10
0.01
0.00
PD(MAX) = ( TJ(MAX) - TA ) / θJA
RT9198/A-15xU5
COUT = 1μF, X7R
Simulation Verify
Where TJ(MAX) is the maximum operating junction
temperature 125°C, TAis the ambient temperature and the
θJA is the junction to ambient thermal resistance.
0
50
100
150
200
250
300
Load Current (mA)
Figure 1
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DS9198/A-15 July 2015
Instable
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9
RT9198/A
For recommended operating conditions specification,
where TJ(MAX) is the maximum junction temperature of the
die (125°C) and TA is the maximum ambient temperature.
The junction to ambient thermal resistance (θJA is layout
dependent) for TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-
5 package is 250°C/W, SC-70-5 and SC-82 package is
333°C/W and WDFN-6L 2x2 package is 165°C/W on
standard JEDEC 51-3 thermal test board. The maximum
power dissipation at TA = 25°C can be calculated by
following formula :
PD(MAX) = (125°C − 25°C)/250 = 400mW (TSOT-23-3/
TSOT-23-5/SOT-23-3/SOT-23-5)
PD(MAX) = (125°C − 25°C)/333 = 300mW (SC-70-5/SC-82)
PD(MAX) = (125°C − 25°C) / 165 = 606mW (WDFN-6L 2x2)
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA. The Figure 2. of derating curves allows
the designer to see the effect of rising ambient temperature
on the maximum power allowed.
700
WDFN-6L 2x2
600
500
SOT-23-3/SOT-23-5
TSOT-23-3/TSOT-23-5
400
300
200
100
0
SC 70-5
SC-82
0
15
30
45
60
75
90 105 120 135
Ambient Temperature (°C)
Figure 2.Derating Curve for Packages
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DS9198/A-15 July 2015
RT9198/A
Outline Dimension
H
D
L
C
B
e
b
A
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
1.803
0.080
0.300
1.295
0.152
1.803
0.508
2.997
3.099
2.007
0.254
0.610
0.035
0.000
0.055
0.014
0.102
0.106
0.071
0.003
0.012
0.051
0.006
0.071
0.020
0.118
0.122
0.079
0.010
0.024
b
C
D
e
H
L
SOT-23-3 Surface Mount Package
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DS9198/A-15 July 2015
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11
RT9198/A
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
0.838
0.080
0.300
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
b
C
D
e
H
L
SOT-23-5 Surface Mount Package
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DS9198/A-15 July 2015
RT9198/A
H
D
L
C
B
e
b
A
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
1.000
0.100
1.803
0.510
3.000
3.099
2.007
0.254
0.610
Min
Max
A
A1
B
0.700
0.000
1.397
0.300
2.591
2.692
1.803
0.080
0.300
0.028
0.000
0.055
0.012
0.102
0.106
0.071
0.003
0.012
0.039
0.004
0.071
0.020
0.118
0.122
0.079
0.010
0.024
b
C
D
e
H
L
TSOT-23-3 Surface Mount Package
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DS9198/A-15 July 2015
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13
RT9198/A
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
1.000
0.100
1.803
0.559
3.000
3.099
1.041
0.254
0.610
Min
Max
A
A1
B
0.700
0.000
1.397
0.300
2.591
2.692
0.838
0.080
0.300
0.028
0.000
0.055
0.012
0.102
0.106
0.033
0.003
0.012
0.039
0.004
0.071
0.022
0.118
0.122
0.041
0.010
0.024
b
C
D
e
H
L
TSOT-23-5 Surface Mount Package
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DS9198/A-15 July 2015
RT9198/A
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
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
b
C
D
e
0.650
0.026
H
L
0.080
0.210
0.260
0.460
0.003
0.008
0.010
0.018
SC-70-5 Surface Mount Package
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RT9198/A
D
e
H
L
B
C
A
b1
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.800
0.000
1.150
0.150
0.350
1.800
1.800
1.100
0.100
1.350
0.400
0.500
2.450
2.200
0.031
0.000
0.045
0.006
0.014
0.071
0.071
0.043
0.004
0.053
0.016
0.020
0.096
0.087
b
b1
C
D
e
1.300
0.051
H
L
0.080
0.200
0.260
0.460
0.003
0.008
0.010
0.018
SC-82 Surface Mount Package
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
16
DS9198/A-15 July 2015
RT9198/A
D
L
E
E1
e
A2
A
A1
b
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A2
b
0.810
0.000
0.750
0.220
2.900
1.100
0.150
0.950
0.380
3.100
0.032
0.000
0.030
0.009
0.114
0.043
0.006
0.037
0.015
0.122
D
e
0.650
0.026
E
4.800
2.900
0.400
5.000
3.100
0.800
0.189
0.114
0.016
0.197
0.122
0.031
E1
L
8-Lead MSOP Plastic Package
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9198/A-15 July 2015
www.richtek.com
17
RT9198/A
D
D2
L
E
E2
SEE DETAIL A
1
b
e
2
1
2
1
A
A3
A1
DETAILA
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A3
b
0.700
0.000
0.175
0.200
1.950
1.000
1.950
0.500
0.800
0.050
0.250
0.350
2.050
1.450
2.050
0.850
0.028
0.000
0.007
0.008
0.077
0.039
0.077
0.020
0.031
0.002
0.010
0.014
0.081
0.057
0.081
0.033
D
D2
E
E2
e
0.650
0.026
L
0.300
0.400
0.012
0.016
W-Type 6L DFN 2x2 Package
Richtek Technology Corporation
14F, No. 8, Tai Yuen 1st Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should
obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot
assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be
accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.
www.richtek.com
18
DS9198/A-15 July 2015
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