RT2519W
Pin Configuration
Marking Information
(TOP VIEW)
8S= : Product Code
YMDNN : Date Code
8S=YM
1
2
3
4
8
7
6
5
VOUT
VOUT
FB
VIN
VIN
NR
EN
DNN
GND
VDFN-8AL 3x3
Functional Pin Description
Pin No.
Pin Name
Pin Function
1, 2
VOUT
Output of the regulator. Decouple this pin to GND with at least 4.7F for stability.
Feedback voltage input. This pin is used to set the desired output voltage via an
external resistive divider. The feedback reference voltage is 0.8V typically.
3
4
FB
GND
System ground.
Enable control input. Connecting this pin to logic high enables the regulator or
driving this pin low puts it into shutdown mode. EN can be connected to IN if not
used. (EN pin is not allowed to be left floating.)
5
EN
Noise reduction input. Decouple this pin to GND with an external capacitor can not
only reduce output noise to very low levels but also slow down the VOUT rise like a
soft-start behavior.
6
NR
Supply input. A minimum of 1F ceramic capacitor should be placed as close as
possible to this pin for better noise rejection.
7, 8
VIN
Functional Block Diagram
VOUT
VIN
Thermal
Protection
UVLO
Current
Limit
Control Logic
EN
-
FB
Quick Start-Up
Bandgap
NR
GND
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2
DS2519W-00 May 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
