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PDF RT9226 Data sheet ( Hoja de datos )
| Número de pieza | RT9226 | |
| Descripción | PWM Step-down DC/DC Converter Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9226 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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RT9226
March, 2000
PWM Step-down DC/DC Converter Controller
General Description
Features
The RT9226 is a low cost, high-efficiency
voltage-mode PWM controller for motherboard
power supply application. High-side 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 RT9226 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 200 kHz
operating frequency and high speed PWM control
loop with high-side N-channel MOSFET driver
provide optimized compromise between
efficiency, cost, and response speed.
l Low cost and small size
l High efficiency
l Fast response with 200kHz operating frequency
l Adjustable current limit by sensing MOSFET
rDS(ON), without extra current sensing resistor
l Shutdown function
Applications
l Low cost CPU power supply
l Motherboard I/O power supply
l Add-on card power supply
Ordering Information
RT9226-oo
Pin Configurations
Part Number
Pin Configuration
Package type
S: SOP-14
Operation temperature range
C: Commercial standard
RT9226CS
(Plastic SOP-14)
TOP VIEW
RT 1
14 VCC
OCSET 2
13 NC
SS 3
12 NC
NC 4
11 NC
FB 5
10 BOOT
EN 6
9 UGATE
GND 7
8 PHASE
RichTek Technology Corp.
6F, No. 35, Hsintai Road, Chupei City, Hsinchu, Taiwan, R.O.C.
-- 1 / 6 --
DS9226-01
Tel: (8863)5510047 Fax: (8863)5537749
1 page  
Typical Applications
RT9226
March, 2000
R1 C3
12V
10Ω C1
1µF
D2
15V
10
1000 pF
L1
BOOT
2
14
VCC
OCSET
R4
2.2k
+ 1µH
C4
1
RT
9
1000µF x 2
6
EN
UGATE
CET6030L
Q1
L2
38
C2
0.1µ F
SS
5
FB
PHASE
7
GND
D1
7µ H
C5
+
1000µF x 6
RT9226
R2
330
R3
200
VIN 5V
V OUT
3.3V/10A
C4, C5: Each 1000µF 6.3WV DC, Sanyo MV-GX or Equivalent.
L1: Core: Micrometals T50-52; Winding: 5 turns of 18 AWG.
L2: Core: Micrometals T60-52; Winding: 14 turns of 17 AWG.
D1: BYV118
Q1: CET6030L
RichTek Technology Corp.
6F, No. 35, Hsintai Road, Chupei City, Hsinchu, Taiwan, R.O.C.
-- 5 / 6 --
DS9226-01
Tel: (8863)5510047 Fax: (8863)5537749
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet RT9226.PDF ] | |
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