RT9167/A
Low-Noise, Fixed Output Voltage,
200mA/500mA LDO Regulator
General Description
The RT9167/A is a 200mA/500mA low dropout and
low noise micropower regulator suitable for portable
applications. The output voltages range from 1.5V to
5.0V in 100mV increments and 2% accuracy. The
RT9167/A is designed for use with very low ESR
capacitors. The output remains stable even with 1µF
ceramic output capacitor.
The RT9167/A uses and internal PMOS as the pass
device, which does not cause extra GND current in
heavy load and dropout conditions. The shutdown
mode of nearly zero operation current makes the IC
suitable for battery-power devices. Other features
include a reference bypass pin to improve low noise
performance, current limiting, and over temperature
protection.
Features
Stable with Low-ESR Output Capacitor
Low Dropout Voltage (220mV and 200mA)
Low Operation Current - 80µA Typical
µ
Shutdown Function
Low Noise Output
Low Temperature Coefficient
Current and Thermal Limiting
Custom Voltage Available
SOT-25 and SOP-8 Packages
Applications
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
Battery-powered Equipment
Hand-held Equipment
Ordering Information
RT9167/A-
Package type
B : SOT-25 Type I
BR : SOT-25 Type II
S : SOP-8
Operating temperature range
C: Commercial standard
Output voltage
15 : 1.5V
16 : 1.6V
:
:
49 : 4.9V
50 : 5.0V
500mA Output current
200mA Output current
Pin Configurations
Part Number
RT9167/A-
CB
Pin Configurations
TOP VIEW
5
4
(Plastic SOT-25)
1
2
3
1.
2.
3.
4.
5.
IN
GND
SHDN
BP
OUT
RT9167/A-
CBR
TOP VIEW
5
4
(Plastic SOT-25)
1
2
3
1.
2.
3.
4.
5.
OUT
GND
IN
SHDN
BP
RT9167/A-
CS
SHDN 1
IN 2
OUT 3
BP 4
TOP VIEW
8 GND
7 GND
6 GND
5 GND
(Plastic SOP-8)
DS9167/A-10 July 2001
www.richtek-ic.com.tw
1
RT9167/A
Absolute Maximum Ratings
Input Voltage
Power Dissipation, P
D
@ T
A
= 25°C
SOT-25
SOP-8
Operating Junction Temperature Range
Storage Temperature Range
Package Thermal Resistance
SOT-25,
θ
JA
SOP-8,
θ
JA
Lead Temperature (Soldering, 5 sec.)
250°C/W
160°C/W
260°C
0.25W
0.625W
−40°C
to 125°C
−65°C
to 150°C
8V
Electrical Characteristics
(V
IN
= 5.0V, 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
RT9167
RT9167A
RT9167
RT9167A
RT9167/A
GND Pin Current
RT9167
RT9167A
Dropout Voltage
RT9167/A
(V
OUT
(Nominal)≥3.0V
RT9167/A
Version)
RT9167A
Line Regulation
Load Regulation
RT9167
RT9167A
(Note)
Symbol
V
IN
∆V
OUT
I
MAX
I
LIMIT
Test Conditions
Min
2.9
2.7
-2
200
500
--
--
--
--
--
--
--
--
--
-0.2
--
--
1.6
--
--
--
--
Typ
--
--
--
--
--
300
700
80
90
90
1.1
55
220
600
--
0.01
0.01
--
--
--
0.01
155
350
58
Max
7
7
+2
--
--
--
--
150
150
150
5
100
300
750
+0.2
0.04
0.04
--
0.4
100
1
--
--
--
Units
V
%
mA
mA
I
L
= 50mA
I
L
= 1mA
R
LOAD
= 1Ω
No Load
I
G
I
OUT
= 200mA
I
OUT
= 500mA
I
OUT
= 1mA
I
OUT
= 50mA
I
OUT
= 200mA
I
OUT
= 500mA
V
IN
= (V
OUT
+0.15) to 7V, I
OUT
= 1mA
I
OUT
= 0mA to 200mA
I
OUT
= 0mA to 500mA
V
IN
= 3V to 5.5V
V
IN
= 3V to 5.5V
V
OUT
= 0V
µA
RT9167/A
V
DROP
mV
∆V
LINE
∆V
LOAD
V
IH
V
IL
I
SD
I
GSD
T
SD
e
NO
PSRR
%/V
%/mA
V
V
nA
µA
°C
nV
Hz
dB
SHDN Input High Threshold
SHDN Input Low Threshold
SHDN Bias Current
Shutdown Supply Current
Thermal Shutdown Temperature
Output Noise
Ripple Rejection
C
BP
= 10nF, C
OUT
= 10µF
F = 100Hz, C
BP
= 10nF, C
OUT
= 10µF
--
--
Notes: Dropout voltage definition: V
IN
- V
OUT
when V
OUT
is 50 mV below the value of V
OUT
at V
IN
= V
OUT
+ 0.5V
DS9167/A-10 July 2001
www.richtek-ic.com.tw
5
PCB Design
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