rt9226b ETC-unknow, rt9226b Datasheet - Page 3

• Manufacturer Part Number: rt9226b
• Description: Synchronous Pwm Step-down Dc/dc Converter Controller
• Manufacturer: ETC-unknow

Function Block Diagram
Pin Description
DS9226B-01 May 2001
Pin No.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
PGOOD
VSEN
GND
EN
SS
Pin Name
VSEN
OCSET
SS
FB
EN
GND
PGNDH
PGOOD
PHASE
UGATE
BOOT
PGNDL
LGATE
VCC
FB
4.5V
47KΩ
10µA
Vref
Pin Function
Output Voltage Monitoring Input
Current Limit Set Pin with 200µA Current Sink
Soft Start, connect a capacitor from this pin to GND
Feedback Input Pin
Regulator Enable with Low Shutdown
Ground
High Side Drive GND
Power Good Indication Output
Current Limit Sense Input
High Side Driver Output
Driver Power
Low Side Driver GND
Low Side Driver Output
Power Supply Input
Voltage
Monitor
Output
Error
Amp
_
Soft
Start
_
Preliminary
PWM
Comparator
Oscillator
Power-on
Control
Reset
Logic
Control
Logic
Gate
Over Current
Comparator
_
200µA
V
CC
OCSET
PHASE
VCC
BOOT
UGATE
PGNDH
LGATE
PGNDL
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RT9226B
3