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RT9819G-49GU3

Description
Power Management Circuit
CategoryPower/power management    The power supply circuit   
File Size231KB,13 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet View All

RT9819G-49GU3 Overview

Power Management Circuit

®
RT9819
Micro-Power Voltage Detectors
General Description
The RT9819 is a micro-power voltage detector supervising
the power supply voltage level for microprocessors (μP)
or digital systems. It provides internally fixed threshold
levels with 0.1V per step ranging from 1.2V to 5V, which
covers most digital applications. It features low supply
current of 3μA. The RT9819 performs supervisory function
by sending out a reset signal whenever the V
DD
voltage
falls below a preset threshold level. This reset signal will
last the whole period before V
DD
recovering. Once V
DD
recovered upcrossing the threshold level, the reset signal
will be released after a certain delay time. The RT9819 is
provided in SC-70-3, SC-82, SOT-23-3 and WDFN-6L
1.6x1.6 packages.
Features
Internally Fixed Threshold 1.2V to 5V in 0.1V Step
High Accuracy
±
1.5%
Low Supply Current 3μA
μ
No External Components Required
Quick Reset within 20μs
μ
Built-in Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
Low Functional Supply Voltage 0.9V
CMOS Push-Pull Output
Small SC-70-3, SC-82, SOT-23-3 and WDFN-6L
1.6x1.6 Packages
RoHS Compliant and Halogen Free
Ordering Information
RT9819 -
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
Y : SC-82
YR : SC-82 (R-Type)
QW : WDFN-6L 1.6x1.6 (W-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
49 : 4.9V
50 : 5.0V
Reset Active Timeout Period
A = 0ms
(RESET)
B = 55ms
(RESET)
C = 220ms
(RESET)
D = 450ms
(RESET)
E = 0ms
(RESET)
F = 55ms
(RESET)
G = 220ms
(RESET)
H = 450ms
(RESET)
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.
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
Applications
Computers
Controllers
Intelligent Instruments
Critical
μP
and
μC
Power Monitoring
Portable/Battery-Powered Equipment
Typical Application Circuit
VDD
up
RESET/
RESET
RESET/
RESET
RT9819
GND
VDD
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
www.richtek.com
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