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PDF RT9167 Data sheet ( Hoja de datos )
| Número de pieza | RT9167 | |
| Descripción | 300mA/500mA LDO Regulator | |
| Fabricantes | Richtek | |
| Logotipo |  |
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1. RT9167  Hay una vista previa y un enlace de descarga de RT9167 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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RT9167/A
Low-Noise, Fixed Output Voltage,300mA/500mA LDO Regulator
General Description
Features
The RT9167/A is a 300mA/500mA low dropout and low
noise micropower regulator suitable for portable
applications. The output voltages range from 1.5V to 5V
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 an internal P-MOSFET 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-
powered devices. Other features include a reference
bypass pin to improve low noise performance, current
limiting, and over temperature protection.
Ordering Information
RT9167/A-
z Stable with Low-ESR Output Capacitor
z Low Dropout Voltage (350mV @ 300mA)
z Low Operation Current −80μA Typical
z Shutdown Function
z Low Noise Output
z Low Temperature Coefficient
z Current and Thermal Limiting
z Custom Voltage Available
z SOT-23-5 and SOP-8 Packages
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Cellular Telephones
z Laptop, Notebook, and Palmtop Computers
z Battery-powered Equipment
z Hand-held Equipment
Package Type
B : SOT-23-5
BR : SOT-23-5 (R-Type)
S : SOP-8
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
2H : 2.85V
Note :
500mA Output Current
300mA Output Current
Richtek products are :
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Pin Configurations
(TOP VIEW)
VOUT
5
BP
4
23
VIN GND EN
SOT-23-5
BP EN
54
23
VOUT GND VIN
SOT-23-5 (R-Type)
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
EN
VIN
VOUT
BP
2
3
4
8 GND
7 GND
6 GND
5 GND
SOP-8
DS9167/A-29 April 2011
www.richtek.com
1
1 page  
Typical Operating Characteristics
Output Voltage vs. Temperature
3.33
3.32
3.31
3.30
3.29
3.28
3.27
3.26
3.25
-50 -25
VOUT = 3.3V
0 25 50 75 100 125 150
Temperature (°C)
Dropout Voltage vs. Load Current
250
125°C
200
25°C
150
100 -40°C
50
0
0
RT9167
VOUT = 5V
0.05 0.1 0.15 0.2 0.25 0.3
Load Current (A)
Current Limit vs. Temperature
700
650
600
550
500
450
400
350
300
-50
-25
RT9167
VOUT = 5V
0 25 50 75 100 125
Temperature (°C)
DS9167/A-29 April 2011
RT9167/A
Quiescent Current vs. Temperature
120
105
90
75
60
45
30
15
0
-50 -25
VOUT = 3.3V
0 25 50 75 100 125 150
Temperature (°C)
Dropout Voltage vs. Load Current
600
125°C
500
25°C
400
300
-40°C
200
100
0
0
RT9167A
VOUT = 3.3V
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
Load Current (A)
Current Limit vs. Temperature
900
800
700
600
500
400
300
200
-50
-25
RT9167A
VOUT = 3.3V
0 25 50 75 100 125
Temperature (°C)
www.richtek.com
5
5 Page 
The value of junction to case thermal resistance θJC is
popular for users. This thermal parameter is convenient
for users to estimate the internal junction operated
temperature of packages while IC operating. It's
independent of PCB layout, the surroundings airflow effects
and temperature difference between junction to ambient.
The operated junction temperature can be calculated by
following formula :
TJ = TC + PD x θJC
Where TC is the package case temperature measured by
thermal sensor, PD is the power dissipation defined by
user’ s function and the θJC is the junction to case thermal
resistance provided by IC manufacturer. Therefore it's easy
to estimate the junction temperature by any condition.
For example, how to calculate the junction temperature
of RT9167A-28CB SOT-23-5 package. If we use input
voltage VIN = 3.3V at an output current IO = 500mA and
the case temperature (pin 4 of SOT-23-5 package)
TC = 70°C measured by thermal couple while operating,
then our power dissipation is as follows :
PD = (3.3V − 2.8V) x 500mA + 3.3V x 90μA ≅ 250mW
And the junction temperature TJ could be calculated as
following :
TJ = TC + PD x θJC
TJ = 70°C + 0.25W x 130°C/W
= 70°C + 32.5°C
= 102.5°C < TJ(MAX) =125°C
For this operation application, TJ is lower than absolute
maximum operation junction temperature 125°C and it’s
safe to use.
RT9167/A
DS9167/A-29 April 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet RT9167.PDF ] | |
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