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PDF RT9177A Data sheet ( Hoja de datos )
| Número de pieza | RT9177A | |
| Descripción | Ultra-Low-Noise 200mA/500mA LDO Regulator | |
| Fabricantes | Richiek | |
| Logotipo |  |
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Preliminary
RT9177/A
Ultra-Low-Noise 200mA/500mA LDO Regulator
General Description
Features
The RT9177/A is a 200mA/500mA low dropout and low
noise micro-power regulator suitable for portable RF
applications. The output voltage accuracy is within ±2%
and range from 2.4V to 3.2V in 100mV increments could
be selected. It is designed for using very low ESR output
capacitor. Its output remains stable even when using a
1μF ceramic as its output capacitor.
With an internal PMOS as the pass device, it does not
need extra GND current in heavy load and dropout
conditions. In shutdown mode, nearly zero operation
current makes the IC suitable for battery-power devices.
Other features including current limiting and over
temperature protection. The noise performance can be
improved by connecting a capacitor to the bypass pin.
Ordering Information
RT9177/A-
z Ultra-Low-Noise (150nV/ Hz ) for RF Application
z 1μF Ceramic COUT Stable
z Low Dropout Voltage (220mV @ 200mA)
z Low Operation Current - 80μA Typical
z Shutdown Function
z Low Temperature Coefficient
z Current and Thermal Limiting
z Customized Voltage Available
z SOT-23-5 Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Cellular Phones
z Laptop, Notebook, and Palmtop Computers
z Battery-powered Equipment
z Hand-held Equipment
Marking Information
Package Type
B : SOT-23-5 (Type - I)
BR : SOT-23-5 (Type - II)
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Pin
Configurations
Output Voltage
24 : 2.4V
25 : 2.5V
:
31 : 3.1V
32 : 3.2V
2H : 2.85V
500mA Output Current
200mA Output Current
(TOP VIEW)
VIN 1
GND 2
5 VOUT
EN 3 4 BP
SOT-23-5 (Type - I)
Note :
RichTek Pb-free products are :
−RoHS compliant and compatible with the current require-
VOUT 1 5 BP
ments of IPC/JEDEC J-STD-020.
−Suitable for use in SnPb or Pb-free soldering processes.
−100% matte tin (Sn) plating.
GND 2
VIN 3
4 EN
SOT-23-5 (Type - II)
DS9177/A-11 March 2005
www.richtek.com
1
1 page  
Preliminary
RT9177/A
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
PSRR
10mA
100mA
VOUT = 3V
TA = 25°C
CBP = 470pF
100 1K 10K 100K
Frequency (Hz)
1M
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
PSRR
10mA
100mA
VOUT = 3V
TA = 25°C
CBP = 10nF
100
1K
10K 100K
1M
Frequency (Hz)
Noise Signal & Spectrum Distribution
Time (mS)
0 2 4 6 8 10
15500 150
4500 50
-3500
≈
20
10
0
0
-50
CIN = 1uF TAN
COUT = 4.7uF TAN
≈
-150
CBP = 10nF
Load = 10mA
Sampling Rate = 250kHz
-250
25 50 75 100
Frequency (kHz)
-350
125
Noise Signal & Spectrum Distribution
Time (mS)
0 2 4 6 8 10
120500 250
80 0
-250
60
≈
40
20
0
0
CIN = 1uF TAN
COUT = 4.7uF TAN
CBP = 470pF
Load = 10mA
Sampling Rate = 250kHz
-250
≈
-500
-750
25 50 75 100
Frequency (kHz)
-1000
125
0
15500
Noise Signal & Spectrum Distribution
Time (mS)
2 4 6 8 10
15
4500 50
-50
30
≈
20
10
0
0
-5
CIN = 1uF TAN
COUT = 4.7uF TAN
CBP = 10nF
Load = 100mA
Sampling Rate = 250kHz
≈
-1
-2
25 50 75 100
Frequency (kHz)
-3
125
0
120500
Noise Signal & Spectrum Distribution
Time (mS)
2 4 6 8 10
2
800
-250
60
≈
40
20
0
0
0
CIN = 1uF TAN
COUT = 4.7uF TAN
CBP = 470pF
Load = 100mA
Sampling Rate = 250kHz
-2
≈
-5
-7
25 50 75 100
Frequency (kHz)
-1
125
DS9177/A-11 March 2005
www.richtek.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet RT9177A.PDF ] | |
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