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PDF RT9020 Data sheet ( Hoja de datos )
| Número de pieza | RT9020 | |
| Descripción | Low Noise Ultra-Fast With Soft Start CMOS LDO Regulator | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9020 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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RT9020
500mA, Low Dropout, Low Noise Ultra-Fast With Soft Start
CMOS LDO Regulator
General D escription
Feature s
The RT9020 is a high-peorfrmance, 500mALDO regulato,r
offering extremely high PSRR nad ultra-low dropout, ideal
for portable RF and wireless applications with demanding
performance and space requirements.
The RT9020 quiescent current is as low as 25μA, further
prolonging the battery life. The RT9020 also works with
low-ESR ceramic capacitors, reducing the ma ount of board
space necessary for power applications, critical in hand-
held wireless devices.
The RT9020 consumes typical 0.7μA in shutdown mode
and has fast turn-on time less than 70μs (without C SS).
The other features include ultra-low dropout voltage, high
output accuracy, current lmi iting protection, and high rpi ple
rejection ratio.Tiny packages SOT-23-5 and SC-70-5 are
available.
Ordering Information
RT9020-
Package Type
B : SOT-23-5
U5 : SC-70-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Fixed Output Voltage
15 : 1.5V
16 : 1.6V
:
32 : 3.2V
33 : 3.3V
1B : 1.25V
1H : 1.85V
2H : 2.85V
Note :
Richtek Pb-free a nd Green products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-ST D-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Wide Operating Voltage Ranges : 2.2V to 5.5V
Low Dropout : 250mV at 500mA
5mA Discharge Current of VOUT when IC Shutdown
Ultra-Low-Noise for DSC Application
Ultra-Fast Response in Line/Load Transient
Current Limiting Protection
Thermal Shutdown Protection
High Power Supply Rejection Ratio
Output Only 1μF Capacitor Required for Stability
TTL-Logic-Controlled Shutdown Input
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Digital Still Camera
CDMA/GSM Cellular Handsets
Portable InformationAppliances
Laptop, Palmtops,Notebook Computers
Mini PCI & PCI-Express Cards
PCMCIA & New Cards
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.
Pin Configurations
TOP VIEW
VOUT
SS
54
23
VIN GND EN
SOT-23-5 / SC-70-5
DS9020-03 June 2009
www.richtek.com
1
http://www.Datasheet4U.com
1 page  
Typical Operating Characteristics
(CIN = C OUT = 1uF/X7R, C SS = 1nF, unless otherwise specif ied)
Output Voltage vs. Temperature
3.40
VIN = 5.0V
3.35
3.30
3.25
3.20
3.15
3.10
-50
-25
0 255 07 5
Temperature (°C)
100 125
RT9020
Dropout Voltage vs. Load Current
300
VOUT = 3.3V
250 TJ = 125°C
200
TJ = 25°C
150
100 TJ = -40°C
50
0
0 100 200 300 400 500
Load Current (mA)
Quiescent Current vs. Temperature
50
VIN = 4.5V, VOUT = 3.3V
40
30
20
10
0
-50
-25
0 25 50 75
Temperature (°C)
100 125
Start Up
VIN = 4.5V, VOUT = 3.1V, CSS = 22nF, No Load
Soft Start Time
1000100
VIN = 5.0V, VOUT = 3.3V
80008
60006
40004
20002
0
012345
6
Css (nF)
789
10
EN Pin Shutdown Response
VIN = 4.5V, VOUT = 3.3V, No Load
VEN
(5V/Div)
VEN
(5V/Div)
VOUT
(1V/Div)
IIN
(50mA/Div)
Time (10ms/Div)
VOUT
(2V/Div)
IIN
(50mA/Div)
Time (5ms/Div)
DS9020-03 June 2009
www.richtek.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet RT9020.PDF ] | |
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