RT9162
DS9162-09 July 2002
www.richtek.com
1
300mA Low Dropout Positive Voltage Regulator
General Description
The RT9162 is a positive low dropout regulator
designed for applications requiring low dropout
performance at full rated current. The device is
available in fixed output voltages of 3.3V and 3.5V.
The RT9162 provides excellent regulation over line,
load, and temperature variations.
The other features include low dropout performance
at a maximum of 1.3V at 300mA, fast transient
response, internal current limiting, and thermal
shutdown protection of the output devices. The
RT9162 is a three-terminal regulator compatible with
industrial 78XX series and available in surface mount
SOT-89 packages.
Ordering Information
RT9162-
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.
Features
Low Dropout, Maximum 1.3V at 300mA
Fast Transient Response
2% Total Output Regulation
0.4% Line Regulation
0.4% Load Regulation
SOT-89 and TO-92 Packages
Applications
5V to 3.3V Linear Regulator
Low Voltage Microcontroller, DSF, ... etc. Power
Supply
Linear Regulator for LAN Card and CD-ROM
Pin Configurations
Part Number
Pin Configurations
RT9162-33CZL
RT9162-35CZL
(Plastic TO-92)
TOP VIEW
1. VIN
2. GND
3. VOUT
RT9162-33CZT
RT9162-35CZT
(Plastic TO-92)
TOP VIEW
1. GND
2. VIN
3. VOUT
RT9162-33CX
RT9162-35CX
(Plastic SOT-89)
TOP VIEW
1. VOUT
2. GND
3. VIN
RT9162-33CXL
RT9162-35CXL
(Plastic SOT-89)
TOP VIEW
1. GND
2. VIN
3. VOUT
Typical Application Circuit
Operating temperature range
C: Commercial standard
Package type
ZL : TO-92 L type
ZT : TO-92 T type
X : SOT-89
XL : SOT-89 L Type
Output voltage
33 : 3.3V
35 : 3.5V
V
IN
V
OUT
C1
10
F
VOUT
GND
VIN
C2
10
F
RT9162
+
+
1
2
3
1
2
3
1 2 3
1 2 3
RT9162
DS9162-09 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,
JC
160
C/W
SOT-89,
JC
100
C/W
SOT-89,
JA
300
C/W
Operating Junction Temperature Range
-
40
C to 125
C
Storage Temperature Range
-
65
C to 150
C
Electrical Characteristics
(V
IN
= 5.0V, T
A
= 25
C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
RT9162-33
3.235
3.300
3.365
Output Voltage
(1)
RT9162-35
V
OUT
3.430
3.500
3.570
V
Line Regulation
(1)
V
LINE
V
IN
= 5V15V
--
0.1
0.4
%
Load Regulation
(1)
V
LOAD
I
L
= 0 - 300mA
--
0.2
0.4
%
Dropout Voltage
(2)
V
DROP
V
OUT
= 1%
--
1.2
1.3
V
Current Limit
I
LIMIT
400
--
--
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 testing with Kelvin connections required.
(2) Dropout voltage is defined as the input to output differential at which the output voltage drops 1% below the
value measured with a 2V differential.
(3) Bandwidth of 10 Hz to 10 kHz.
RT9162
www.richtek.com
DS9162-09 July 2002
6
RICHTEK TECHNOLOGY CORP.
Headquarter
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek.com
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