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PDF RT9226B Data sheet ( Hoja de datos )
| Número de pieza | RT9226B | |
| Descripción | Synchronous PWM Step-Down DC/DC Converter Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9226B (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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Preliminary
RT9226B
Synchronous PWM Step-Down DC/DC
Converter Controller
General Description
The RT9226B is a low cost, high-efficiency voltage-mode
PWM controller for motherboard power supply application.
Synchronous N-Channel MOSFET driver, short-circuit
protection, and soft start function are integrated in a single
chip. A simple high power buck regulator with shutdown
function can be implemented with minimum external
components.
The RT9226B provides current-limit protection by
monitoring the voltage drop across N-Channel MOSFET
in over current condition, therefore, eliminates the current
sensing resistor and minimizes the efficiency loss. The
soft start function reduces the stress on power supply
and components in power on duration. The 200kHz
operating frequency and high speed PWM control loop
with Synchronous N-Channel MOSFET driver provide
optimized compromise between efficiency, cost, and
response speed. Other features include output voltage
monitoring for power good indication and over voltage
protection.
Ordering Information
RT9226B
Package Type
S : SOP-14
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Note :
RichTek Pb-free 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.
−100%matte tin (Sn) plating.
Features
z Synchronous N-Channel MOSFET Driver
z High Efficiency
z Fast Response with 200kHz Operating Frequency
z Adjustable Current Limit by Sensing MOSFET
RDS(ON), without Extra Current Sensing Resistor
z Shutdown Function
z Power Good Indication Output and Over-Voltage
Protection
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Low Cost CPU Power Supply
z Motherboard I/O Power Supply
z Add-On Card Power Supply
z DDR SDRAM Bus Terminator Power Supply
Pin Configurations
(TOP VIEW)
VSEN
OCSET
SS
FB
EN
GND
PGNDH
14
2 13
3 12
4 11
5 10
69
78
SOP-14
VCC
LGATE
PGNDL
BOOT
UGATE
PHASE
PGOOD
DS9226B-04 March 2005
www.richtek.com
1
1 page  
Outline Dimension
J
I
Preliminary
A
B
F
C
D
H
M
RT9226B
Symbol
A
B
C
D
F
H
I
J
M
Dimensions In Millimeters
Min Max
8.534
8.738
3.810
3.988
1.346
1.753
0.330
0.508
1.194
1.346
0.178
0.254
0.102
0.254
5.791
6.198
0.406
1.270
Dimensions In Inches
Min Max
0.336
0.344
0.150
0.157
0.053
0.069
0.013
0.020
0.047
0.053
0.007
0.010
0.004
0.010
0.228
0.244
0.016
0.050
14-Lead SOP Plastic Package
RICHTEK TECHNOLOGY CORP.
Headquarter
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
DS9226B-04 March 2005
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)89191466 Fax: (8862)89191465
Email: [email protected]
www.richtek.com
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet RT9226B.PDF ] | |
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