RT9169
DS9169-04 July 2002
www.richtek.com
1
100mA, 4
A Quiescent Current CMOS LDO Regulator
General Description
The RT9169 series are 100mA ultra-low quiescent
current CMOS low dropout (LDO) regulator designed
for battery-powered equipments. The output voltages
range from 1.2V to 5V with 0.1V per step.
The other features include 4
A ultra-low quiescent,
low dropout voltage, high output accuracy, current
limiting protection, and high ripple rejection ratio.
Ordering Information
RT9169-
Typical Application Circuit
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
Ultra-Low Quiescent Current: 4
A
Low Dropout: 450mV at 100mA
Wide Operating Voltage Ranges: 2V~6V
Current Limiting Protection
Only 1
F Output Capacitor Required for Stability
High Power Supply Rejection Ratio
Applications
Battery-Powered Equipment
Palmtops, Notebook Computers
Hand-held Instruments
PCMCIA Cards
Pin Configurations
Part Number
Pin Configurations
RT9169-
CZL
(Plastic TO-92)
TOP VIEW
1. VIN
2. GND
3.
VOUT
RT9169-
CZT
(Plastic TO-92)
TOP VIEW
1. VOUT
2. VIN
3.
GND
RT9169-
CX
(Plastic SOT-89)
TOP VIEW
1. GND
2. VIN (TAB)
3.
VOUT
RT9169-
CV
(Plastic SOT-23)
TOP VIEW
1. VOUT
2. GND
3.
VIN
RT9169-
CB
(Plastic SOT-25)
TOP VIEW
1. VIN
2. GND
3. EN
4. NC
5.
VOUT
Operating temperature range
C: Commercial standard
Package type
ZL : TO-92 L Type
ZT : TO-92 T Type
X : SOT-89
V : SOT-23
CB : SOT-25
Output voltage
12 : 1.2V
13 : 1.3V
:
49 : 4.9V
50 : 5.0V
V
OUT
RT9169
VOUT
C
OUT
1
F
VIN
V
IN
C
IN
1
F
GND
1
2
3
1
3
2
5
4
3
2
1
1 2 3
1 2 3
RT9169
www.richtek.com
DS9169-04 July 2002
2
Pin Description
Pin Name
Pin Function
VIN
Power Input
VOUT
Output Voltage
GND
Ground
EN
Chip Enable Control Input
Function Block Diagram
Absolute Maximum Ratings
Input Voltage
7V
Power Dissipation, P
D
@ T
A
= 25
C
TO-92
0.6W
SOT-89
0.5W
SOT-23
0.25W
SOT-25
0.25W
Operating Junction Temperature Range
-40
C to 125
C
Storage Range
-65
C to 150
C
Package Thermal Resistance
TO-92,
JA
160
C/W
SOT-89,
JC
100
C/W
SOT-89,
JA
180
C/W
SOT-23,
JA
250
C/W
SOT-25,
JA
250
C/W
Current
Limit
VIN
VOUT
GND
+
_
EN
RT9169
DS9169-04 July 2002
www.richtek.com
3
Electrical Characteristics
(V
IN
= 5.5V, C
IN
= 1
F, C
OUT
= 1
F, T
A
= 25
C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Input Voltage Range
V
IN
2
--
6
V
Output Voltage Accuracy
V
OUT
I
L
= 1mA
-2
--
+2
%
Maximum Output Current
I
MAX
V
IN
= V
OUT
+ 0.6V, V
IN
3.6V
100
--
--
mA
Current Limit
I
LIMIT
I
L
= 100mA
150
250
--
mA
No Load
--
4
7
A
GND Pin Current
I
G
I
OUT
= 100mA
4
10
A
I
OUT
= 1mA, V
IN
3.6V
--
4
10
I
OUT
= 50mA, V
IN
3.6V
--
200
300
Dropout Voltage
V
DROP
I
OUT
= 100mA, V
IN
3.6V
--
450
600
mV
Line Regulation
V
LINE
V
IN
= (V
OUT
+ 0.3V) to 6V,
V
IN
3.6V, I
OUT
= 1mA
-0.2
--
+0.2
%/V
Load Regulation
V
LOAD
I
LOUT
= 0mA to 100mA
--
0.01
0.04
%/mA
Output Noise
e
NO
BW = 100Hz to 50KHz
C
OUT
= 10
F
--
250
--
V
Ripple Rejection
PSRR
F = 1KHz, C
OUT
= 1
F
--
30
--
dB
Standby Current
RT9169-CB
EN = V
IN
--
0.1
1
A
EN Threshold
0.6
1
2
V
Thermal Shutdown Protection
125
--
--
C
Application Information
A 1
F (or larger) capacitor is recommended between
VOUT and GND for stability. The part may oscillate
without the capacitor. Any type of capacitor can be
used, but not Aluminum electrolytes when operating
below 25
C. The capacitance may be increased
without limit.
A 1
F capacitor (or larger) should be placed between
VIN to GND.
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