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PDF RT9025 Data sheet ( Hoja de datos )
| Número de pieza | RT9025 | |
| Descripción | Ultra Low Dropout LDO | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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RT9025
2A, Ultra Low Dropout LDO
General Description
The RT9025 is a high performance positive voltage regulator
designed for use in applications requiring very low Input
voltage and extremely low dropout voltage at up to
2A(Peak). It operates with a VIN as low as 1V and VDD
voltage 3V with programmable output voltage as low as
0.8V. The RT9025 features ultra low dropout that is ideal
for applications where VOUT is very close to VIN.
Additionally, it has an enable pin to further reduce power
dissipation while shutdown and provides excellent
regulation over variations in line, load and temperature.
The RT9025 provides a power good signal to indicate if
the voltage level of Vo reaches 90% of its rating value.
The RT9025 is availablein the SOP-8 and SOP-8 (Exposed
Pad) package with 1.05V, 1.2V, 1.5V, 1.8V and 2.5V
internally preset outputs that are also adjustable by using
external resistors.
Features
l Ultra Low Dropout Voltage 230mV at 2A
l Output Current up to 2A
l High Accuracy Output Voltage 2%
l Power Good Output
l Output Voltage Pull Low Resistor when Disable
l Over Current Protection
l Thermal Shutdown Protection
l RoHS Compliant and 100% Lead (Pb)-Free
Applications
l Note Book PC Applications
l Motherboard Applications
Pin Configurations
(TOP VIEW)
Ordering Information
RT9025-
Package Type
S : SOP-8
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Output Voltage
1K : 1.05V/Adj
12 : 1.2V/Adj
15 : 1.5V/Adj
18 : 1.8V/Adj
25 : 2.5V/Adj
Note :
Richtek products are :
} 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.
PGO OD
EN
VIN
VDD
8
27
36
45
SOP-8
GND
ADJ
VOUT
NC
PGOOD
EN
VIN
VDD
8
27
GND
3 96
45
GND
ADJ
VOUT
NC
SOP-8 (Exposed Pad)
DS9025-05 March 2011
www.rich tek .com
1
http://www.Datasheet4U.com
1 page  
Typical Operating Characteristics
Load Transient Response
VOUT
(20mV/Div)
VOUT
(20mV/Div)
RT9025
Load Transient Response
IOUT
(1A/Div)
VDD = 5V, VIN = 1.8V, VOUT = 1.2V ADJ
Time (2.5ms/Div)
VIN Line Transient Response
VIN 3
(1V/Div)
2
VOUT
(50mV/Div)
VDD = 5V, VOUT = 1.2V ADJ, IOUT = 0A
Time (250μs/Div)
VDD Line Transient Response
5
VDD
(1V/Div) 4
VOUT
(20mV/Div)
VIN = 1.8V, VOUT = 1.2V ADJ, IOUT = 0A
Time (250μs/Div)
IOUT
(1A/Div)
VDD = 5V, VIN = 3.3V, VOUT = 2.5V FIX
Time (2.5ms/Div)
VIN 4
(1V/Div) 3
VIN Line Transient Response
VOUT
(50mV/Div)
VDD = 5V, VOUT = 2.5V FIX, IOUT = 0A
Time (250μs/Div)
VDD Line Transient Response
5
VDD
(1V/Div) 4
VOUT
(20mV/Div)
VIN = 3.3V, VOUT = 2.5V FIX, IOUT = 0A
Time (250μs/Div)
DS9025-05 March 2011
www.richtek.com
5
5 Page 
Outline Dimension
A
JB
H
M
RT9025
F
C
I
D
Symbol
A
B
C
D
F
H
I
J
M
Dimensions In Millimeters
Min Max
4.801
5.004
3.810
3.988
1.346
1.753
0.330
0.508
1.194
1.346
0.170
0.254
0.050
0.254
5.791
6.200
0.400
1.270
Dimensions In Inches
Min Max
0.189
0.197
0.150
0.157
0.053
0.069
0.013
0.020
0.047
0.053
0.007
0.010
0.002
0.010
0.228
0.244
0.016
0.050
8-Lead SOP Plastic Package
DS9025-05 March 2011
www.rich tek.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RT9025.PDF ] | |
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