Preliminary
RT9169
100mA, 4µA Quiescent Current CMOS LDO Regulator
µ
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 4µA ultra-low quiescent,
low dropout voltage, high output accuracy, current
limiting protection, and high ripple rejection ratio.
Features
Ultra-Low Quiescent Current: 4µA
µ
Low Dropout: 450mV at 100mA
Wide Operating Voltage Ranges: 2V~6V
Current Limiting Protection
Only 1µF Output Capacitor Required for
µ
Stability
High Power Supply Rejection Ratio
Ordering Information
RT9169-
Package type
ZL : TO-92 L Type
ZT : TO-92 T Type
X : SOT-89
V : SOT-23
CB : SOT-25
Operating temperature range
C: Commercial standard
Output voltage
12 : 1.2V
13 : 1.3V
:
49 : 4.9V
50 : 5.0V
Applications
Battery-Powered Equipment
Palmtops, Notebook Computers
Hand-held Instruments
PCMCIA Cards
Pin Configurations
Part Number
RT9169-
CZL
Pin Configurations
TOP VIEW
1. VIN
2. GND
3. VOUT
TOP VIEW
1. VOUT
2. VIN
3. GND
TOP VIEW
1. GND
2. VIN (TAB)
3. VOUT
TOP VIEW
1. VOUT
2. GND
3. VIN
TOP VIEW
5
4
(Plastic TO-92)
1 2 3
RT9169-
CZT
(Plastic TO-92)
1 2 3
Typical Application Circuit
RT9169
V
IN
C
IN
1
µ
F
VIN
GND
VOUT
C
OUT
1
µ
F
V
OUT
RT9169-
CX
1
2
3
(Plastic SOT-89)
RT9169-
CV
1
3
(Plastic SOT-23)
2
RT9169-
CB
(Plastic SOT-25)
1
2
3
1.
2.
3.
4.
5.
VIN
GND
EN
NC
VOUT
DS9169-02 October 2001
www.richtek-ic.com.tw
1
RT9169
Part Number
RT9169-41CV
RT9169-42CV
RT9169-43CV
RT9169-44CV
RT9169-45CV
RT9169-46CV
Marking
BX
BY
BZ
CT
CU
CV
Preliminary
Part Number
RT9169-47CV
RT9169-48CV
RT9169-49CV
RT9169-50CV
RT9169-25CB
RT9169-28CB
Marking
CW
CX
CY
CZ
C1
C2
Pin Description
Pin Name
VIN
VOUT
GND
EN
Pin Function
Power Input
Output Voltage
Ground
Chip Enable Control Input
Function Block Diagram
VIN
Current
Limit
VOUT
+
_
EN
GND
Absolute Maximum Ratings
Input Voltage
Power Dissipation, P
D
@ T
A
= 25° C
TO-92
SOT-89
SOT-23
SOT-25
Operating Junction Temperature Range
Storage Range
Package Thermal Resistance
TO-92,
θ
JA
SOT-89,
θ
JC
SOT-89,
θ
JA
SOT-23,
θ
JA
SOT-25,
θ
JA
www.richtek-ic.com.tw
7V
0.6W
0.5W
0.25W
0.25W
-40°C to 125°C
-65°C to 150°C
160°C/W
100°C/W
300°C/W
250°C/W
250°C/W
DS9169-02 October 2001
4
Preliminary
Electrical Characteristics
(V
IN
= 5.5V, C
IN
= 1µF, C
OUT
= 1µF, T
A
= 25°C, unless otherwise specified)
Parameter
Input Voltage Range
Output Voltage Accuracy
Maximum Output Current
Current Limit
GND Pin Current
Symbol
V
IN
∆V
OUT
I
MAX
I
LIMIT
I
G
I
L
= 1mA
V
IN
= V
OUT
+ 0.6V, V
IN
≥
3.6V
R
LOAD
= 1Ω
No Load
I
OUT
= 100mA
I
OUT
= 1mA, V
IN
≥
3.6V
Dropout Voltage
V
DROP
I
OUT
= 50mA, V
IN
≥
3.6V
I
OUT
= 100mA, V
IN
≥
3.6V
Line Regulation
Load Regulation
Output Noise
Ripple Rejection
Standby Current
EN Threshold
RT9169-CB
∆V
LINE
V
IN
= (V
OUT
+ 0.3V) to 6V,
V
IN
≥
3.6V, I
OUT
= 1mA
--
--
--
-0.2
--
--
--
--
0.6
Test Conditions
Min
2
-2
100
--
--
Typ
--
--
--
250
4
4
4
200
450
--
0.01
250
50
0.1
1
RT9169
Max
6
+2
--
--
7
10
--
--
--
+0.2
0.04
--
--
1
2
Units
V
%
mA
mA
µA
µA
mV
%/V
%/mA
µV
DB
µA
V
∆V
LOAD
I
LOUT
= 0mA to 100mA
e
NO
PSRR
BW = 100Hz to 50KHz
C
OUT
= 10µF
F = 1KHz, C
OUT
= 10µF
EN = V
IN
Application Information
A 1µF (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 1µF capacitor (or larger) should be placed between
VIN to GND.
DS9169-02 October 2001
www.richtek-ic.com.tw
5
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