RT9553B

High Accuracy Current/Voltage Sensing and Protection IC

The RT9553B 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 RT9553B is available in the WDFN-10L 3x3 package.

Applications

Notebook

Key Spec.
	RT9553B
Status	Active
Vin (min) (V)	5
Vin (max) (V)	24
Amplifier Ratio	100
Channel Number	1
Features	Adjustable Current Limit;Enable Input;OCP;OVP;UVP
Package Type	WDFN3x3-10

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

Datasheet
Title	Last Update	Download
High Accuracy Current/Voltage Sensing and Protection IC	2017/05/16

Technical Documents
Title	Item Type	Last Update	Download
Richtek Product Selection Guide [Jan., 2024]	Selection Guide	2024/01/18
Richtek Featured Product Tree [Aug., 2023]	Selection Guide	2023/08/07

Part Number	Package Type	Package Qty.	Free Sample	Buy From Authorized Distributor
RT9553BGQW	WDFN3x3-10	1500	Request	Buy from Distributor

Please confirm with our distributor or sales representative for actual stock status.