RT9161-18GV [RICHTEK]
IC REG LINEAR 1.8V 300MA SOT23-3;
| 型号： | RT9161-18GV |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | IC REG LINEAR 1.8V 300MA SOT23-3 |
| 文件： | 总10页 (文件大小：251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9161/A
300/500mA Low Dropout Linear Voltage Regulator
General Description
Features
z Low Dropout Voltage of 200mV at Output Current
100mA, 450mV at Output Current 300mA, and
750mV at 500mA Output Current
The RT9161/A is a 300/500mA fixed output voltage low
dropout linear regulator. Typical ground current is
approximately 110μA, from zero to maximum loading
conditions. Wide range of available output voltage fits most
of applications. Built-in output current-limiting most
thermal-limiting provide maximal protection against any
fault conditions.
z Guaranteed 300/500mA Output Current
z Internal 1.5Ω P-MOSFET Draws No Base Current
z Low Ground Current 110μA
z 2%Accuracy Output Voltage
z Input Voltage Range up to 12V
For ease of application, the RT9161/Acomes in the popular
3-pin SOT-23 (300mA), SOT-89 (300mA), SOT-223
(500mA), or TO-92 packages.
z Extremely Tight Load Regulation
z Fast Transient Response
z Current-limiting and Thermal-limiting
z RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9161/A-
Applications
z Voltage Regulator for LANCard, CD-ROM, andDVD
z Wireless Communication Systems
z Battery Powered Systems
Package Type
V : SOT-23-3
X : SOT-89
G : SOT-223
ZL : TO-92 (L-Type)
ZT : TO-92 (T-Type)
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
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
Pin Configurations
(TOP VIEW)
VIN
500mA Output Current
300mA Output Current
Note :
3
1
2
3
2
Richtek products are :
GND
VOUT
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VIN
(TAB)
GND
VOUT
SOT-23-3
SOT-89
` Suitable for use in SnPb or Pb-free soldering processes.
1
2
3
VIN
GND
VOUT
(TAB)
SOT-223
DS9161/A-35 April 2011
www.richtek.com
1
RT9161/A
3
2
1
3
2
1
VOUT
GND
VIN
VOUT
VIN
GND
TO-92 (L-Type)
TO-92 (T-Type)
Typical Application Circuit
RT9161/A
VIN VOUT
GND
V
V
OUT
IN
C
C
10uF
IN
OUT
1uF
Electrolytic
Functional Pin Description
Pin Name
VOUT
GND
Pin Function
Output Voltage.
Ground.
VIN
Power Input.
Function Block Diagram
VIN
VOUT
Error Amp
Current
Limiting
Sensor
-
Thermal
Shutdown
1.2V
Reference
GND
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DS9161/A-35 April 2011
RT9161/A
Absolute Maximum Ratings
z Input Voltage ---------------------------------------------------------------------------------------------------------------- −0.3 to 14V
z Operating Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C
z StorageTemperature Range --------------------------------------------------------------------------------------------- −65°C to 150°C
z PowerDissipation, PD @ TA = 25°C
SOT-23-3--------------------------------------------------------------------------------------------------------------------- 0.4W
SOT-89 ----------------------------------------------------------------------------------------------------------------------- 0.571W
SOT-223 --------------------------------------------------------------------------------------------------------------------- 0.741W
TO-92 ------------------------------------------------------------------------------------------------------------------------- 0.625W
z Package Thermal Resistance (Note 1)
SOT-23-3, θJA --------------------------------------------------------------------------------------------------------------- 250°C/W
SOT-23-3, θJC --------------------------------------------------------------------------------------------------------------- 140°C/W
SOT-89, θJA ----------------------------------------------------------------------------------------------------------------- 175°C/W
SOT-89, θJC ----------------------------------------------------------------------------------------------------------------- 100°C/W
SOT-223, θJA ---------------------------------------------------------------------------------------------------------------- 135°C/W
SOT-223, θJC --------------------------------------------------------------------------------------------------------------- 15°C/W
TO-92, θJA ------------------------------------------------------------------------------------------------------------------- 160°C/W
TO-92, θJC ------------------------------------------------------------------------------------------------------------------- 125°C/W
Electrical Characteristics
(TA = 25°C, CIN = 1μF, COUT = 10μF, unless otherwise specified.)
Parameter
Symbol
Test Conditions
I = 1mA, V = 5V
Min
Typ
Max
Unit
Output Voltage Accuracy
ΔV
−2
--
2
%
OUT
L
IN
Output Voltage Temperature
Coefficient
--
50
150
PPM/°C
Line Regulation
--
--
2
3
30/50
--
ΔV
I = 1mA, V = 4.5 to 12V
%V
LINE
L
IN
OUT
Load Regulation
(Note 2)
RT9161
RT9161A
(Note 4)
1
mV
ΔV
I = 1mA to 300/500mA, V = 5V
L IN
LOAD
350
500
--
580
900
Current Limit
(Note 3)
mA
I
V
IN
= 5V, V
= 0V
LIM
OUT
--
Dropout Voltage
Standby Current
450/750 600/1000
110 180
mV
V
DROP
I = 300/500mA
L
--
I
I = 0, V = 12V
μA
STANDBY
L
IN
Note 1. θJA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Note 2. Regulation is measured at constant junction temperature, using pulsed ON time.
Note 3. Current Limit is measured at constant junction temperature, using pulsed ON time.
Note 4. The dropout voltage is defined as VIN − VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
DS9161/A-35 April 2011
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3
RT9161/A
Typical Operating Characteristics
Temperature Stability
Quiescient Current vs. Temperature
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
3.4
VOUT = 3.3V
3.2
3
2.8
2.6
VOUT = 2.5V
VIN = 5V
2.4
-30
0
30
60
90
120
-50
-25
0
25
50
75
100
125
Temperature
(°C)
Temperature (°C)
Dropout Voltage (VIN-VOUT
)
Short Circuit Current
1
0.8
0.6
0.4
0.2
0
1.4
1.2
1
125°C
125°C
25°C
25°C
0.8
0.6
0.4
0.2
0
VOUT = 3.3V
400 500
0
100
200
300
0
2
4
6
8
10
Input/Output Differential (V)
ILoad (mA)
Line Transient Response
Line Transient Response
7
6
5
4
7
6
5
4
VOUT = 3.3V
TA = 25°C
VOUT = 2.5V
TA = 25°C
COUT = 10μF Electrolytic
IOUT = 0.1A
COUT = 10μF Electrolytic
IOUT = 0.1A
T
T
T
T
≈
≈
100
100
>
0
>
0
-100>
-200
>
-100
-200
μ
Time (100μs/Div)
Time (100μs/Div)
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DS9161/A-35 April 2011
RT9161/A
Load Transient Response
Load Transient Response
150
100
50
60
40
20
VIN = 5V
OUT = 3.3V
CIN = 1μF
COUT = 10μF
VIN = 5V
OUT = 3.3V
CIN = 1μF
OUT = 10μF
TA = 25°C
V
V
C
TA = 25°C
T
>
0
T
>
0
-50
-20
≈
≈
≈
≈
200
100
100
50
T
T
>
1
10
-100
-50
Time (100μs/Div)
Time (100μs/Div)
Load Transient Response
Load Transient Response
60
40
20
0
150
100
50
VIN = 5V
VOUT = 2.5V
VIN = 5V
VOUT = 2.5V
CIN = 1μF
COUT = 10μF
TA = 25°C
CIN = 1μF
COUT = 10μF
TA = 25°C
T
>
0
>
T
-20
-50
≈
≈
≈
≈
100
200
50
100
T
T
>
>
1
10
-50
-100
Time (100μs/Div)
Time (100μs/Div)
PSRR
PSRR
0
0
CIN = 1uF
CIN = 1uF
COUT = 10uF Tantalum
IN = 5V
COUT = 10uF Tantalum
VIN = 5V
-10
-20
-30
-40
-50
-60
-10
V
VOUT = 3.3V
TA = 25°C
VOUT = 2.5V
TA = 25°C
100mA
100mA
-20
-30
-40
-50
-60
10mA
10mA
10
100
1K
10K
100K 1M
10
100
1K
10K
100K1M
Frequency (Hz)
Frequency (Hz)
DS9161/A-35 April 2011
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5
RT9161/A
Application Information
A10uF capacitor with 200mΩ or higher ESR, connecting
between VOUT and GND pins, is recommended for
stability. A capacitor with ESR smaller than 200 mΩ may
cause VOUT oscillation as shown in Figure 1. Operating
temperature should be well considered to ensure that the
capacitance is no less than 10uF over the operating
temperature range. Please take the notice thatAluminum
electrolytic capacitors may cause VOUT oscillation when
operating below −25°C. The capacitance can be increased
without limit for better transient response.
PD(MAX) = ( TJ(MAX) − TA ) / θJA
Where TJ(MAX) is the maximum operation junction
temperature 125°C, TAis the ambient temperature and the
θJA is the junction to ambient thermal resistance.
For recommended operating conditions specification of
RT9161/A, 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 SOT-223 packages,
the thermal resistance θJA is 135°C/W on the standard
JEDEC 51-3 single-layer 1S thermal test board. The
maximum power dissipation at TA = 25°C can be calculated
by following formula :
A 1uF or higher capacitor should be placed between VIN
andGNDto filter out input noise and ensure stable output
voltage.
Region of Stable COUT ESR vs. Load Current
PD(MAX) = ( 125°C − 25°C ) / 250 = 0.400 W for
SOT-23-3 packages
100
VIN = 3.3V
CIN = 1uF
COUT = 10uF
10
PD(MAX) = ( 125°C − 25°C ) / 175 = 0.571 W for
SOT-89 packages
PD(MAX) = ( 125°C − 25°C ) / 135 = 0.741 W for
SOT-223 packages
1
Stable
PD(MAX) = ( 125°C − 25°C ) / 160 = 0.625 W for
TO-92 packages
0.1
Instable
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA. For RT9161/A packages, the Figure 2 of
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
0.01
0
100
200
300
400
500
Load Current (mA)
Figure 1
Thermal protection limits power dissipation in RT9161/A.
When the operation junction temperature exceeds 165°C,
the OTP circuit starts the thermal shutdown function and
turns the pass element off. The pass element turn on again
after the junction temperature cools by 30°C.
allowed.
800
SOT-223 package
700
TO-29 package
600
SOT-89 package
500
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is :
400
300
SOT-23-3 package
200
100
0
PD = (VIN − VOUT) x IOUT + VIN x IQ
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 :
0
15
30
45
60
75
90
105 120
Ambient Temperature
(°C)
Figure 2.Derating Curves
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DS9161/A-35 April 2011
RT9161/A
Outline Dimension
A
D
E
L
b
C
e
D1
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
0.125
0.165
A
A1
b
3.175
1.143
0.406
0.406
4.445
3.429
4.318
1.143
4.191
1.372
0.533
0.533
5.207
5.029
5.334
1.397
0.045
0.016
0.016
0.175
0.135
0.170
0.045
0.054
0.021
0.021
0.205
0.198
0.210
0.055
C
D
D1
E
e
12.700
0.500
L
3-Lead TO-92 Plastic Package
DS9161/A-35 April 2011
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7
RT9161/A
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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DS9161/A-35 April 2011
RT9161/A
D
D1
A
B
C
C1
e
e
H
A
b
b
b1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
b
1.397
0.356
2.388
0.406
3.937
0.787
4.394
1.397
1.448
0.356
1.600
0.483
2.591
0.533
4.242
1.194
4.597
1.753
1.549
0.432
0.055
0.014
0.094
0.016
0.155
0.031
0.173
0.055
0.057
0.014
0.063
0.019
0.102
0.021
0.167
0.047
0.181
0.069
0.061
0.017
B
b1
C
C1
D
D1
e
H
3-Lead SOT-89 Surface Mount Package
DS9161/A-35 April 2011
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9
RT9161/A
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
1.800
0.100
0.840
3.700
7.300
6.700
3.100
Min
Max
A
A1
b
1.400
0.020
0.600
3.300
6.700
6.300
2.900
0.055
0.001
0.071
0.004
0.033
0.146
0.287
0.264
0.122
0.024
0.130
0.264
0.248
0.114
B
C
D
b1
e
2.300
0.091
H
0.230
1.500
0.800
0.350
2.000
1.100
0.009
0.059
0.031
0.014
0.079
0.043
L
L1
3-Lead SOT-223 Surface Mount Package
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
5F, No. 95, Minchiuan Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)86672399 Fax: (8862)86672377
Email: marketing@richtek.com
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit
design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be
guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
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DS9161/A-35 April 2011
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