RT9711A Datasheet, PDF (1/9 Pages) Richtek Technology Corporation – 80mΩ, 1.5A/0.6A High-Side Power Switches with Flag

RT9801A/B
User Programmable Micro-Power Voltage Detectors
General Description
The RT9801A/B is a micro-power voltage detector
supervising the power supply voltage level for
microprocessors (μP) or digital systems. It provides user
programmable threshold levels with 0.1V step ranging
from 1.5V to 5V, which covers most digital applications. It
features low supply current of 3μA. Selection of V_TH is
easily achieved through 3 pins connected to GND, V_DD or
floating for different threshold voltage settings. Two versions
of threshold voltages, 1.5V to 4V and 2.5V to 5V, which
are programmed in factory are offered by customer
demands.
The RT9801A/B 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. Reset signal will release after
V_DD is recovered and last for the whole period of Reset
Active Time-out period.
RT9801A/B is N-Channel, open-drain output and provided
in SOT-23-6 package.
Ordering Information
RT9801
Package Type
E : SOT-23-6
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Reset Threshold
A : 2.5V to 5V
B : 1.5V to 4V
Note :
RichTek Pb-free and Green 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.
`100%matte tin (Sn) plating.
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
DS9801AB-11 March 2007
Features
z User Programmable Threshold 1.5V to 5V in 0.1V
Step with ±3% Accuracy
z Low Supply Current 3μA
z Quick Reset within 20μs
z Built-in Recovery Delay 200ms
z Low Functional Supply Voltage 0.9V
z Small SOT-23-6 Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
Pin Configurations
(TOP VIEW)
VSET1 VSET2 VDD
65 4
123
VSET0 GND _RESET
SOT-23-6
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark
from left to right.
Typical Application Circuit
μP
VDD ^GND
RESET
VSET0 VSET1
RT9801
GND VSET2
RESET VDD
Pull Up
RT9801 V_TH = 2.5V in this example
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