RT9027A 查看數據表（PDF） - Richtek Technology
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RT9027A Datasheet PDF : 12 Pages
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RT9027A/B
Linear Fan Driver
General Description
The RT9027A/B is a high performance positive voltage
regulator designed for very low dropout voltage up to 0.5
Amps. The VSET voltage must be larger than 1V to guarantee
that VOUT is 1.6 times of VSET. When VSET is less than 1V,
the IC will be shutdown. The FON pin turns VOUT to fully-
on when FON is given low. For RT9027B (EN version),
FON pin is equivalent to EN pin. The RT9027A/B provides
excellent regulation over variations in line, load and
temperature. The RT9027A/B is available in the SOP-8
package.
Ordering Information
RT9027
Package Type
S : SOP-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
A : FON Function
B : EN Function
Note :
Richtek Pb-free and Green 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.
Typical Application Circuit
Features
z VOUT Follows 1.6 Times of VSET
z 150mV Dropout @ 0.5A
z Over Current and Over Temperature Protection
z FON Pin Turns VOUT Fully On
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Notebook Computer Fan Driver
z Battery Powered System
z Motherboard
z Peripheral Card
Pin Configurations
(TOP VIEW)
FON
VIN
2
VOUT
3
VSET
4
8
GND
7
GND
6
GND
5
GND
RT9027A
EN
VIN
VOUT
VSET
8
2
7
3
6
4
5
RT9027B
SOP-8
GND
GND
GND
GND
VIN
VSET
FON/EN
2 VIN
3
VOUT
CIN
2.2uF
RT9027A/B
4 VSET
1
GND 5 to 8
FON/EN
VOUT
COUT
2.2uF
DS9027A/B-01 October 2008
Downloaded from Elcodis.com electronic components distributor
www.richtek.com
1
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