RT9819B-26GV Datasheet RT9819A-27GV, RT9819A-42GV, RT9819B-26GV | P1-P3

RT9819

DS9819-08 July 2013 www.richtek.com

Features

Internally Fixed Threshold 1.2V to 5V in 0.1V Step

z High Accuracy

±±

±1.5%

z Low Supply Current 3

μμ

μA

z No External Components Required

z Quick Reset within 20

μμ

μs

z Built-in Recovery Delay Include 0ms, 55ms, 220ms,

450ms Options

z Low Functional Supply Voltage 0.9V

z CMOS Push-Pull Output

z Small SC-70-3, SC-82, SOT-23-3 and WDFN-6L

1.6x1.6 Packages

z RoHS Compliant and Halogen Free

Applications

z Computers

z Controllers

z Intelligent Instruments

z Critical μP and μC Power Monitoring

z Portable/Battery-Powered Equipment

Micro-Power Voltage Detectors

Ordering Information

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

voltage

falls below a preset threshold level. This reset signal will

last the whole period before V

recovering. Once V

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.

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Typical Application Circuit

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.

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)

RT9819

VDDGND

RESET

VDD

RESET

RT9819

DS9819-08 July 2013www.richtek.com

Pin Configurations

(TOP VIEW)

SOT-23-3 (L-Type)

SOT-23-3SC-70-3

SC-82 (R-Type)

SC-82

Function Block Diagram

Functional Pin Description

Pin Name Pin Function

GND Ground.

RESET Active Low Push-Pull Reset Output.

RESET Active High Push-Pull Reset Output

VDD Power Input.

NC No Internal Connection.

WDFN-6L 1.6x1.6

VDD

GND

RESET/

RESET

GND

VDD

RESET/

RESET

GND

VDD

RESET/

RESET

VDD

GND

RESET/

RESET

GND

VDD

RESET/

RESET

Timer

VSET

Threshold

Voltage Setting

POR

Power On Reset

CMP

N MOS

RESET/

RESET

VDD

P MOS

GND

VDD

RESET/

RESET

RT9819

DS9819-08 July 2013 www.richtek.com

Absolute Maximum Ratings (Note 1)

z Terminal Voltage (with Respect to GND)

---------------------------------------------------------------------------------------------------------------------- −0.3V to 6V

z All Other Inputs ------------------------------------------------------------------------------------------------------ −0.3V to (V

+ 0.3V)

z Input Current, I

VDD

--------------------------------------------------------------------------------------------------- 20mA

z Power Dissipation, PD @ T

= 25°C

SC-70-3/SC-82 ------------------------------------------------------------------------------------------------------- 0.25W

SOT-23-3 -------------------------------------------------------------------------------------------------------------- 0.4W

WDFN-6L 1.6x1.6 --------------------------------------------------------------------------------------------------- 1.7W

z Package Thermal Resistance (Note 2)

SC-70-3/SC-82, θ

------------------------------------------------------------------------------------------------- 400°C/W

SOT-23-3, θ

--------------------------------------------------------------------------------------------------------- 250°C/W

WDFN-6L 1.6x1.6, θ

---------------------------------------------------------------------------------------------- 58.5°C/W

z Lead Temperature (Soldering, 10sec.)-------------------------------------------------------------------------- 260°C

z Storage Temperature Range -------------------------------------------------------------------------------------- −65°C to 125°C

z ESD Susceptibility (Note 3)

HBM (Human Body Model)---------------------------------------------------------------------------------------- 2kV

MM (Machine Model) ----------------------------------------------------------------------------------------------- 200V

Electrical Characteristics

Recommended Operating Conditions (Note 4)

z Junction Temperature Range-------------------------------------------------------------------------------------- −40°C to 125°C

z Ambient Temperature Range-------------------------------------------------------------------------------------- −40°C to 85°C

= 3V, T

= 25°C, unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

RT9819A/B/C/D 0.9 -- 6

Operating V

OUT

) Range V

RT9819E/F/G/H 1.1 -- 6

Supply Current I

= 3V , V

= 4.5V -- 3 8 μA

Reset Threshold V

-- 1.2 to 5 -- V

Threshold Voltage Accuracy ΔV

−1.5 -- 1.5 %

Threshold Voltage Hysteresis V

HYS

-- 0.01 V

-- V

Drop to Reset Delay t

Drop = V

−125mV -- 20 -- μs

RT9819A/E -- 0 -- ms

RT9819B/F 35 55 75 ms

RT9819C/G 143 220 297 ms

Reset Active

Time Out Period

RT9819D/H

≥ 1.02 × V

292 450 608 ms

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

RT9819B-26GV

Mfr. #:

Buy RT9819B-26GV

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Description:

IC VOLT DETECTOR 2.6V SOT23-3

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RT9819B-26GV

RT9819B-26GV

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