RT7255
Ordering Information
RT7255
Package Type
J8 : TSOT-23-8
VIN
SW
Pin Configurations
(TOP VIEW)
PGOOD
5
4
Lead Plating System
G : Green (Halogen Free and Pb Free)
A : Hiccup + PSM
C : Hiccup + PWM
8
7
2
BOOT
SS
Richtek products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
TSOT-23-8
Suitable for use in SnPb or Pb-free soldering
processes.
Marking Information
RT7255AGJ8
07
= : Product Code
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance
07=DNN
RT7255CGJ8
DNN : Date Code
05
= : Product Code
05=DNN
DNN : Date Code
DSPs, FPGAs, and ASICs
Functional Pin Description
Pin No.
1
2
3
4
5
Pin Name
BOOT
SS
GND
FB
PGOOD
Pin Function
Bootstrap supply for high-side gate driver. Connect a 1F ceramic capacitor
between the BOOT and SW pins.
Soft-start time setting. Connect a capacitor from SS to GND to set the soft-start
period.
Power ground.
Feedback voltage input. The pin is used to set the output voltage of the
converter via a resistive divider. The converter regulates V
FB
to 0.6V.
Power good indicator output.
Enable control input. Connect EN to a logic-high voltage to enable the IC or to a
logic-low voltage to disable. Do not leave this high impedance input
unconnected. For automatic start up, connect the EN pin to VIN with a 100k
resistor.
Power input. The input voltage range is from 4.3V to 18V. Must bypass with
a suitable large ceramic capacitor at this pin.
Switch node. Connect to external L-C filter.
6
EN
7
8
VIN
SW
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS7255-01
GND
FB
Note :
EN
6
3
November 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
