Linear Regulator. RT2519 Datasheet


RT2519 Regulator. Datasheet pdf. Equivalent


Part Number

RT2519

Description

Low-Dropout Linear Regulator

Manufacture

Richtek

Total Page 12 Pages
Datasheet
Download RT2519 Datasheet


RT2519
®
RT2519
1A, Low Noise, Ultra High PSRR, Low-Dropout Linear Regulator
General Description
The RT2519 is a high performance positive low dropout
(LDO) regulator designed for applications requiring very
low dropout voltage and ultra high Power Supply Ripple
Rejection (PSRR) at up to 1A. The input voltage range is
from 2.2V to 6V and the output voltage is programmable
as low as 0.8V. A P-MOSFET switch provides excellent
transient response with just a 4.7μF ceramic output
capacitor. The external enable control effectively reduces
power dissipation while shutdown and further output noise
immunity is achieved through bypass capacitor on NR pin.
Additionally, the RT2519 features a precise 3% output
regulation over line, load, and temperature variations. The
device is available in the VDFN-8AL 3x3 package and is
specified from 40°C to 125°C.
Ordering Information
RT2519
Pin 1 Orientation***
(2) : Quadrant 2, Follow EIA-481-D
Package Type
QV : VDFN-8AL 3x3 (V-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
***Empty means Pin1 orientation is Quadrant 1
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.
Features
Very Low Dropout : 170mV Typical at 1A
Ultra High PSRR : 63dB @ 1kHz, 38dB @ 1MHz
Input Voltage Range : 2.2V to 6V
Adjustable Output Voltage : 0.8V to 5.5V
40°C to 125°C Operating Junction Temperature
Range
Excellent Noise Immunity
Fast Response Over Load and Line Transient
Stable with a 4.7μF Output Ceramic Capacitor
Accurate Output Voltage 3% Over Load, Line,
Process, and Temperature Variations
Enable Control
Over-Current Protection
Over-Temperature Protection
Applications
Telecom/Networking Cards
Motherboards/Peripheral Cards
Industrial Applications
Wireless Infrastructures
Set-Top Boxes
Medical Equipments
Notebook Computers
Battery Powered Systems
Simplified Application Circuit
VIN
Enable
RT2519
VIN VOUT
CIN
EN FB
NR
CNR
GND
VOUT
R1 COUT
R2
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS2519-03 August 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT2519
RT2519
Pin Configuration
(TOP VIEW)
VOUT 1
VOUT 2
FB 3
GND 4
GND
9
8 VIN
7 VIN
6 NR
5 EN
VDFN-8AL 3x3
Marking Information
KN= : Product Code
KN=YM
DNN
YMDNN : Date Code
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.
3
FB
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.
4, 9 (Exposed Pad) GND
System ground. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
Enable control input. Connecting this pin to logic high enables the regulator or
5 EN 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.)
Noise reduction input. Decouple this pin to GND with an external capacitor can
6 NR not only reduce output noise to very low levels but also slow down the VOUT
rise like a soft-start behavior.
7, 8
VIN
Supply input. A minimum of 1F ceramic capacitor should be placed as close as
possible to this pin for better noise rejection.
Functional Block Diagram
VIN
UVLO
Thermal
Protection
Current
EN Control Logic
Limit
-
Quick Start-Up
Bandgap
VOUT
FB
NR
GND
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS2519-03 August 2017


Features ® RT2519 1A, Low Noise, Ultra High PSR R, Low-Dropout Linear Regulator Genera l Description The RT2519 is a high perf ormance positive low dropout (LDO) regu lator designed for applications requiri ng very low dropout voltage and ultra h igh Power Supply Ripple Rejection (PSRR ) at up to 1A. The input voltage range is from 2.2V to 6V and the output volta ge is programmable as low as 0.8V. A P- MOSFET switch provides excellent transi ent response with just a 4.7μF ceramic output capacitor. The external enable control effectively reduces power dissi pation while shutdown and further outpu t noise immunity is achieved through by pass capacitor on NR pin. Additionally, the RT2519 features a precise 3% outpu t regulation over line, load, and tempe rature variations. The device is availa ble in the VDFN-8AL 3x3 package and is specified from −40°C to 125°C. Orde ring Information RT2519 Pin 1 Orientati on*** (2) : Quadrant 2, Follow EIA-481- D Package Type QV : VDFN-8AL 3x3 (V-Type) Lead Plating System G : Gre.
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