RT9163
500mA Low Dropout Positive Voltage Regulator
General Description
The RT9163 is a positive low dropout regulator designed
for applications requiring low dropout performance at full
rated current. The device is available in fixed output
voltage of 3.3V, 3.5V, and 5.0V. The RT9163 provides
excellent regulation over line, load, and temperature
variations.
The other features include low dropout performance at a
maximum of 1.4V at 500mA, fast transient response,
internal current limiting, and thermal shutdown protection
of the output devices. The RT9163 is a three-terminal
regulator available in surface mount SOT-89, SOT-223,
and TO-252 packages.
Features
Low Dropout, Maximum 1.4V at 500mA
Fast Transient Response
±
2% Total Output Regulation
0.4% Line Regulation
0.4% Load Regulation
TO-92, SOT-89, SOT-223, and TO-252 Packages
RoHS Compliant and 100% Lead (Pb)-Free
Applications
5V to 3.3V Linear Regulator
Low Voltage Microcontroller, DSP,.... etc. Power Supply
Linear Regulator for LAN Card and CD-ROM
Ordering Information
RT9163-
Package Type
ZL : TO-92 (L-Type)
X : SOT-89
XL : SOT-89 (L-Type)
L : TO-252
G : SOT-223 (Type-I)
GL : SOT-223 (Type-II)
GT : SOT-223 Type-III)
GF : SOT-223 (Type-IV)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
33 : 3.3V
35 : 3.5V
50 : 5.0V
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
3
2
1
VOUT
GND
VIN
TO-92 (L-Type)
1
2
3
1
2
3
VOUT GND
(TAB)
VIN
GND
VIN VOUT
(TAB)
SOT-89
SOT-89 (L-Type)
1
1
2
GND
(TAB)
VOUT
VIN
3
2
3
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
VOUT GND VIN
(TAB)
SOT-223 (Type-I)
TO-252
DS9163-28 April 2011
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1
RT9163
1
2
3
1
2
3
1
2
3
VIN
GND VOUT
(TAB)
GND VOUT VIN
(TAB)
GND
VIN VOUT
(TAB)
SOT-223 (Type-II)
SOT-223 (Type-III)
SOT-223 (Type-IV)
Typical Application Circuit
RT9163
V
IN
C
IN
10uF
VIN
VOUT
GND
V
OUT
+
+
C
OUT
10uF
Function Block Diagram
V
IN
Q2
Buffer
Amplifier
Thermal
Shutdown
R4
Error
Amplifier
Q1
-
Current
Limiting
Sensor
R3
V
OUT
R1
V
REF
R2
Functional Pin Description
Pin Name
VOUT
GND
VIN
Pin Function
Output Voltage.
Ground.
Power Input.
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2
+
DS9163-28 April 2011
RT9163
Absolute Maximum Ratings
Input Voltage ---------------------------------------------------------------------------------------------------------------- 15V
Power Dissipation, P
D
@ T
A
= 25°C
TO-92 ------------------------------------------------------------------------------------------------------------------------- 0.625W
SOT-89 ----------------------------------------------------------------------------------------------------------------------- 0.571W
SOT-223 --------------------------------------------------------------------------------------------------------------------- 0.740W
TO-252 ----------------------------------------------------------------------------------------------------------------------- 1.471W
Package Thermal Resistance (Note 1)
TO-92,
θ
JA
------------------------------------------------------------------------------------------------------------------- 160°C/W
SOT-89,
θ
JC
----------------------------------------------------------------------------------------------------------------- 48°C/W
SOT-89,
θ
JA
----------------------------------------------------------------------------------------------------------------- 175°C/W
SOT-223,
θ
JC
---------------------------------------------------------------------------------------------------------------- 19°C/W
SOT-223,
θ
JA
---------------------------------------------------------------------------------------------------------------- 135°C/W
TO-252,
θ
JC
----------------------------------------------------------------------------------------------------------------- 7.5°C/W
TO-252,
θ
JA
------------------------------------------------------------------------------------------------------------------ 68°C/W
Operating Junction Temperature Range -------------------------------------------------------------------------------
−40°C
to 125°C
Storage Temperature Range ---------------------------------------------------------------------------------------------
−65°C
to 150°C
Electrical Characteristics
(V
IN
= 5V, T
A
= 25° C, unless otherwise specified)
Parameter
RT9163-33
Output Voltage
(Note 2)
RT9163-35
RT9163-50
Line Regulation
(Note 2)
Load Regulation
Dropout Voltage
Current Limit
Quiescent Current
Temperature Coefficient
Temperature Stability
RMS Output Noise
(Note 4)
RT9163-33
RT9163-35
RT9163-50
(Note 2)
(Note 3)
Symbol
Test Conditions
Min
3.235
Typ
3.300
3.500
5.000
0.1
0.1
0.2
1.3
--
4.5
0.005
0.5
0.003
Max
3.365
3.570
5.100
0.4
0.4
0.4
1.4
--
8
--
--
--
Unit
V
OUT
V
IN
= 7V
ΔV
LINE
ΔV
LOAD
V
DROP
I
LIM
I
Q
T
C
T
S
V
IN
= 5V to 15V
V
IN
= 7V to 15V
I
L
= 0 to 500mA
ΔV
OUT
= 1%
Load = 1Ω
3.430
4.900
--
--
--
--
550
--
--
--
--
V
%
%
V
mA
mA
%/°C
%
%/V
OUT
Note 1.
θ
JA
is measured in the natural convection at T
A
= 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard. The case point of
θ
JC
is on the center of the exposed pad.
Note 2.
Low duty cycle pulse tested with Kelvin connections.
Note 3.
The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
−
100mV.
Note 4.
Bandwidth of 10 Hz to 10 kHz.
DS9163-28 April 2011
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RT9163
Outline Dimension
D
A
E
L
e
D1
b
C
A1
Dimensions In Millimeters
Symbol
Min
A
A1
b
C
D
D1
E
e
L
3.175
1.143
0.406
0.406
4.445
3.429
4.318
1.143
12.700
Max
4.191
1.372
0.533
0.533
5.207
5.029
5.334
1.397
Dimensions In Inches
Min
0.125
0.045
0.016
0.016
0.175
0.135
0.170
0.045
0.500
Max
0.165
0.054
0.021
0.021
0.205
0.198
0.210
0.055
3-Lead TO-92 Plastic Package
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DS9163-28 April 2011
RT9163
D
D1
A
C
B
C1
e
e
H
A
b
b
b1
Dimensions In Millimeters
Symbol
Min
A
b
B
b1
C
C1
D
D1
e
H
1.397
0.356
2.388
0.406
3.937
0.787
4.394
1.397
1.448
0.356
Max
1.600
0.483
2.591
0.533
4.242
1.194
4.597
1.753
1.549
0.432
Dimensions In Inches
Min
0.055
0.014
0.094
0.016
0.155
0.031
0.173
0.055
0.057
0.014
Max
0.063
0.019
0.102
0.021
0.167
0.047
0.181
0.069
0.061
0.017
3-Lead SOT-89 Surface Mount Package
DS9163-28 April 2011
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