RT9163
DS9163-15 July 2002
www.richtek.com
1
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.
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-
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
Pin Configurations
Part Number
Pin Configurations
RT9163-
CZL
(Plastic TO-92)
TOP VIEW
1. VIN
2. GND
3.
VOUT
RT9163-
CX
(Plastic SOT-89)
TOP VIEW
1. VOUT
2. GND (TAB)
3.
VIN
RT9163-
CXL
(Plastic SOT-89)
TOP VIEW
1. GND
2. VIN (TAB)
3.
VOUT
RT9163-
CL
(Plastic TO-252)
TOP VIEW
1. VOUT
2. GND (TAB)
3.
VIN
RT9163-
CG
(Plastic SOT-223)
Type I
TOP VIEW
1. VOUT
2. GND (TAB)
3.
VIN
RT9163-
CGL
(Plastic SOT-223)
Type II
TOP VIEW
1. VIN
2. GND (TAB)
3.
VOUT
RT9163-
CGT
(Plastic SOT-223)
Type III
TOP VIEW
1. GND
2. VOUT (TAB)
3.
VIN
RT9163-
CGF
(Plastic SOT-223)
Type IV
TOP VIEW
1. GND
2. VIN (TAB)
3.
VOUT
Operating temperature range
C: Commercial standard
Package type
ZL : TO-92
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
Output voltage
33 : 3.3V
35 : 3.5V
50 : 5.0V
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1 2 3
RT9163
www.richtek.com
DS9163-15 July 2002
2
Typical Application Circuit
Pin Description
Pin Name
Pin Function
VOUT Output
Voltage
GND Ground
VIN Power
Input
Function Block Diagram
Marking Information
For marking information, contact our sales representative directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
V
IN
V
OUT
C1
10
F
VOUT
GND
VIN
C2
10
F
RT9163
+
_
+
_
V
IN
Thermal
Shutdown
Current
Limiting
Sensor
V
OUT
Q1
R4
V
REF
R3
R1
R2
Q2
Error
Amplifier
Buffer
Amplifier
+ _
RT9163
DS9163-15 July 2002
www.richtek.com
3
Absolute Maximum Ratings
Input Voltage
15V
Power Dissipation, P
D
@ T
A
= 25
C
TO-92
0.6W
SOT-89
0.5W
Package Thermal Resistance
TO-92,
JA
160
C/W
SOT-89,
JC
100
C/W
SOT-89,
JA
300
C/W
SOT-223,
JC
15
C/W
SOT-223,
JA
60
C/W
TO-252,
JC
15
C/W
TO-252,
JA
56
C/W
Operating Junction Temperature Range
-40C to 125C
Storage Temperature Range
-65C to 150C
Electrical Characteristics
(V
IN
= 5V, T
A
= 25
C, unless otherwise specified)
Parameter Symbol
Test
Conditions
Min
Typ
Max
Units
RT9163-33
3.235
3.300
3.365
RT9163-35
3.430
3.500
3.570
Output Voltage
(1)
RT9163-50
V
OUT
V
IN
= 7V
4.900
5.000
5.100
V
RT9163-33
RT9163-35
V
IN
= 5V ~ 15V
--
0.1
0.4
Line Regulation
(1)
RT9163-50
V
LINE
V
IN
= 7V ~ 15V
--
0.1
0.4
%
Load Regulation
(1)
V
LOAD
I
L
= 0 ~ 500mA
--
0.2
0.4
%
Dropout Voltage
(2)
V
DROP
V
OUT
= 1%
--
1.3
1.4
V
Current Limit
I
LIMIT
Load = 1
550
--
--
mA
Quiescent Current
I
Q
-- 4.5
8 mA
Temperature Coefficient
T
C
--
0.005
-- %/
C
Temperature Stability
T
S
-- 0.5 -- %
RMS Output Noise
(3)
--
0.003
--
%/V
OUT
Notes:
(1) Low duty cycle pulse tested with Kelvin connections.
(2) Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the
value measured with a 1V differential.
(3) Bandwidth of 10 Hz to 10 kHz.
RT9163
www.richtek.com
DS9163-15 July 2002
4
Package Information
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min Max Min Max
A 3.175 4.191 0.125 0.165
A1 1.143 1.372 0.045 0.054
b 0.406 0.533 0.016 0.021
C 0.406 0.533 0.016 0.021
D 4.445 5.207 0.175 0.205
D1 3.429 -- 0.135 --
E 4.318 5.334 0.170 0.210
e 1.143 1.397 0.045 0.055
L 12.700 -- 0.500 --
3-Lead TO-92 Package
b
e
e
D
E
L
A1
D1
C
A
RT9163
DS9163-15 July 2002
www.richtek.com
5
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min Max Min Max
A 1.397 1.600 0.055 0.063
b 0.356 0.483 0.014 0.019
B 2.388 2.591 0.094 0.102
b1 0.406 0.533 0.016 0.021
C -- 4.242 -- 0.167
C1 0.787 1.194 0.031 0.047
D 4.394 4.597 0.173 0.181
D1 1.397 1.753 0.055 0.069
e 1.448 1.549 0.057 0.061
H 0.355 0.432 0.014 0.017
3-Lead SOT-89 Surface Mount
D
D1
C
C1
B
e
e
A
b
b1
b
A
H
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