Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

RT9227A Datasheet(PDF) 5 Page - Richtek Technology Corporation

Part No. RT9227A
Description  Advanced PWM and Dual Fixed Linear Power Controller
Download  10 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9227A Datasheet(HTML) 5 Page - Richtek Technology Corporation

  RT9227A Datasheet HTML 1Page - Richtek Technology Corporation RT9227A Datasheet HTML 2Page - Richtek Technology Corporation RT9227A Datasheet HTML 3Page - Richtek Technology Corporation RT9227A Datasheet HTML 4Page - Richtek Technology Corporation RT9227A Datasheet HTML 5Page - Richtek Technology Corporation RT9227A Datasheet HTML 6Page - Richtek Technology Corporation RT9227A Datasheet HTML 7Page - Richtek Technology Corporation RT9227A Datasheet HTML 8Page - Richtek Technology Corporation RT9227A Datasheet HTML 9Page - Richtek Technology Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 10 page
background image
Preliminary
RT9227A
DS9227A-02 July 2001
www.richtek-ic.com.tw
5
FB2 (Pin 11)
Connect this pin to VOUT2 to set the linear regulator
output voltage.
VIN2 (Pin 12)
This pin supplies power to the internal regulator.
Connect this pin to a suitable 3.3V source.
Additionally, this pin is used to monitor the 3.3V
supply. If, following a startup cycle, the voltage drops
below 2.55V (typically), the chip shuts down. A new
soft-start cycle is initiated upon return of the 3.3V
supply above the under-voltage threshold.
VOUT2 (Pin 13)
Output of the linear regulator. Supplies current up to
230mA.
GND (Pin 14)
Signal ground for the IC. All voltage levels are
measured with respect to this pin.
GATE3 (Pin 15)
Connect this pin to the gate of an external MOSFET
or the base of an NPN. This pin provides the drive for
the linear controller’s pass transistor.
FB3 (Pin 16)
Connect this pin to VOUT3 to set the linear controller
output voltage.
FB (Pin 18)
The FB1 pin is the inverting input of the error
amplifier.
VSEN1 (Pin 19)
This pin is connected to the PWM converter’s output
voltage. The PGOOD and OVP comparator circuits
use this signal to report output voltage status and for
over voltage protection.
OCSET1 (Pin 20)
Connect a resistor (ROCSET1) from this pin to the
drain of the upper MOSFET. ROCSET1, an internal
200
µA current source (IOCSET1), and the upper
MOSFET on-resistance (RDS(ON)) set the PWM
converter over-current (OC) trip point according to
the following equation:
IOCSET1×ROCSET1
IPEAK =
RDS(ON)
PGND (Pin 21)
This is the power ground of UGATE1 and LGATE1.
Tie the PWM converter’s lower MOSFET source to
this pin.
LGATE1 (Pin 22)
Connect LGATE1 to the PWM converter’s lower
MOSFET gate. This pin provides the gate drive for
the lower MOSFET.
An over-current trip cycles the soft-start function.
Sustaining an over-current for 2 soft-start intervals
shuts down the controller.
PHASE1 (Pin 23)
Connect the PHASE1 pin to the PWM converter’s
upper MOSFET source. This pin is used to monitor
the voltage drop across the upper MOSFET for over-
current protection.
UGATE1 (Pin 24)
Connect UGATE pin to the PWM converter’s upper
MOSFET gate. This pin provides the gate drive for
the upper MOSFET.


Html Pages

1  2  3  4  5  6  7  8  9  10 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn