RT9553A Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – High Accuracy Current/Voltage Sensing and Protection IC

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RT9553A
High Accuracy Current/Voltage Sensing and Protection IC
General Description
The RT9553A is designed for over-current detection and
over-/under-voltage protection.
It provides users to set over-current threshold by the ILIM
pin to compare that senses dropping voltage between CSP
pin and CSN pin. Moreover, users can set over-/under-
voltage threshold by the OVSET pin/UVSET pin to
compare with the CSP voltage. The RT9553A is a available
in the WDFN-10L 3x3 package.
Ordering Information
RT9553A
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek 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.
Marking Information
3U= : Product Code
3U=YM
DNN
YMDNN : Date Code
Features
 Common Mode Input Range up to 24V
 VCC Operating Current : 200μA
 VCC Shutdown Current : 10μA (under S3/S4/S5)
 Programmable Over-Current Level
 One Shot PROCHOT Signal when OCP
 Pull Low RESET Signal when OVP/UVP
 OVP/UVP with 8% Recover Hysteresis Range
 Programmable OVP/UVP De-glitch Time
Applications
 Notebook
Pin Configurations
(TOP VIEW)
CSP 1
VCC 2
ILIM 3
EN ⁴
TIMER 5
10 _CSN
9 _PROCHOT
8 RESET
7 OVSET
11 6 UVSET
WDFN-10L 3x3
Simplified Application Circuit
Input
R_SENSE
I_SENSE
Enable
Output
RT9553A
CSN
CSP
VCC
EN
ILIM
PROCHOT
RESET
OVSET
UVSET
TIMER
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9553A-00 September 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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