Richtek RT9818A-13PY, RT9818A-14PV, RT9818A-15PV, RT9818A-16PV, RT9818A-18GV Schematic [ru]

...

Richtek RT9818A-13PY, RT9818A-14PV, RT9818A-15PV, RT9818A-16PV, RT9818A-18GV, RT9818A-18PV, RT9818A-20PB, RT9818A-20PV, RT9818A-21GU3, RT9818A-22GV, RT9818A-22PB, RT9818A-22PV, RT9818A-23PB, RT9818A-23PV, RT9818A-23PY, RT9818A-24PB, RT9818A-24PV, RT9818A-25PB, RT9818A-25PU3, RT9818A-25PV, RT9818A-26GB, RT9818A-26PB, RT9818A-27GV, RT9818A-27PB, RT9818A-27PV, RT9818A-27PY, RT9818A-28PV, RT9818A-29PV, RT9818A-30GV, RT9818A-30GY, RT9818A-30PU3, RT9818A-30PV, RT9818A-31PU3, RT9818A-33PB, RT9818A-33PU3, RT9818A-33PV, RT9818A-34GV, RT9818A-36GY, RT9818A-36PB, RT9818A-36PV, RT9818A-36PY, RT9818A-37GB, RT9818A-37PB, RT9818A-38PU3, RT9818A-39PB, RT9818A-40GB, RT9818A-40GV, RT9818A-41PU3, RT9818A-42PU3, RT9818A-42PX, RT9818B-14PU3, RT9818B-14PV, RT9818B-15PV, RT9818B-16PV, RT9818B-16PVL, RT9818B-18GU3, RT9818B-18GV, RT9818B-18PU3, RT9818B-18PV, RT9818B-18PVL, RT9818B-24PVL, RT9818B-25PU3, RT9818B-25PV, RT9818B-27GU3, RT9818B-27PV, RT9818B-28PV, RT9818B-30GB, RT9818B-30PV, RT9818B-30PVL, RT9818B-31PV, RT9818B-42PV, RT9818B-42PX, RT9818B-45PV, RT9818C-12PV, RT9818C-13PU3, RT9818C-13PV, RT9818C-14PY, RT9818C-15GV, RT9818C-16PU3, RT9818C-16PV, RT9818C-18GV, RT9818C-18PV, RT9818C-20GV, RT9818C-20PB, RT9818C-20PV, RT9818C-21PV, RT9818C-23PU3, RT9818C-23PV, RT9818C-23PVL, RT9818C-25GB, RT9818C-25GV, RT9818C-25PB, RT9818C-25PU3, RT9818C-25PV, RT9818C-26PV, RT9818C-26PY, RT9818C-27GB, RT9818C-27GU3, RT9818C-27GV, RT9818C-27GVL, RT9818C-27PB, RT9818C-27PV, RT9818C-27PVL, RT9818C-27PX, RT9818C-28PB, RT9818C-28PV, RT9818C-29GB, RT9818C-29GV, RT9818C-29GVL, RT9818C-29PU3, RT9818C-29PV, RT9818C-29PVL, RT9818C-30PB, RT9818C-30PV, RT9818C-30PVL, RT9818C-33GVL, RT9818C-33PB, RT9818C-33PV, RT9818C-34PV, RT9818C-35GV, RT9818C-35PV, RT9818C-36GVL, RT9818C-41GVL, RT9818C-42GV, RT9818C-42PV, RT9818C-42PX, RT9818C-46PV, RT9818C-47PV, RT9818C-50PB, RT9818C-50PV, RT9818D-12GV, RT9818D-13GV, RT9818D-26GV, RT9818D-27PV, RT9818D-27PVL, RT9818D-29PV, RT9818D-30GV, RT9818D-30PV, RT9818D-33GV, RT9818D-33PV, RT9818D-35GV, RT9818D-42PV, RT9818E-12PV, RT9818E-18PU3, RT9818E-18PV, RT9818E-19PV, RT9818E-20GVL, RT9818E-20GY, RT9818E-21PY, RT9818E-22PY, RT9818E-23PY, RT9818E-24PY, RT9818E-25PY, RT9818E-27GY, RT9818E-27PV, RT9818E-27PX, RT9818E-30GV, RT9818E-30PV, RT9818E-33GY, RT9818E-35PV, RT9818E-36PV, RT9818E-40PX, RT9818E-40PY, RT9818E-50PV, RT9818F-20PVL, RT9818F-34PV, RT9818F-36PV, RT9818F-38PV, RT9818G-20GVL, RT9818G-20GY, RT9818G-20PV, RT9818G-30GVL Schematic [ru]

Download

Micro-Power Voltage Detectors

RT9818

General Description

The RT9818 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 RT9818 performs supervisory function

by sending out a reset signal whenever the V

falls below a preset threshold level. This reset signal will

last the whole period before VDD recovering. Once V

recovered upcrossing the threshold level, the reset signal

will be released after a certain delay time. RT9818 is

provided in SC-82, SC-70-3, SOT-23-3, SOT-23-5 and

voltage

Features

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

z High Accuracy

z Low Supply Current 3

z No External Components Required

z Quick Reset within 20

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

450ms Options

z Low Functional Supply Voltage 0.9V

z N-Channel Open-Drain Output

z Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89

Packages

z RoHS Compliant and 100% Lead (Pb)-Free

±±

±1.5%

±±

μμ

μA

μμ

μs

μμ

SOT-89 packages.

Applications

Ordering Information

RT9818

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.

DS9818-10 May 2013 www.richtek.com

Package Type U3 : SC-70-3 V : SOT-23-3 VL : SOT-23-3 (L-Type) B : SOT-23-5 X : SOT-89 Y : SC-82 YR : SC-82 (R-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)

z Computers

z Controllers

z Intelligent Instruments

z Critical μP and μC Power Monitoring

z Portable/Battery-Powered Equipment

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Typical Application Circuit

100k

Pull Up

VDD

μP

RESET/

RESET

RT9818

GND

VDD

RESET/ RESET

RT9818

Pin Configurations

GND

RESET/

RESET

VDD

RESET/

RESET

GND

SOT-23-3

Functional Pin Description

Pin Name Pin Function

GND Ground

RESET Active Low Open-Drain Reset Output

RESET Active High Open-Drain Reset Output

VDD

SC-82

VDD

GND

SOT-23-3 (L-Type)

RESET/

RESET

(TOP VIEW)

RESET/

RESET

VDD

SC-82 (R-Type)

GND

RESET/

RESET

GND

VDD

GND

SC-70-3

VDD

RESET/

RESET

RESET/

RESET

231

GNDVDD

SOT-89SOT-23-5

VDD Power Pin

Function Block Diagram

Threshold

Voltage Setting

Timing Diagram

VSET

VDD

CMP

POR

Power On Reset

Timer

RESET/

RESET

N MOS

GND

RESET

Delay Time (0, 55, 220, 450ms)

RESET

Delay Time (0, 55, 220, 450ms)

DS9818-10 May 2013www.richtek.com

RT9818

Absolute Maximum Ratings (Note 1)

z Terminal Voltage (with Respect to GND)

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

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

z Input Current, I

z Power Dissipation, P

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

VDD

@ TA = 25°C

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

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

SOT-23-5 ------------------------------------------------------------------------------------------------------------- 0.4W

SOT-89---------------------------------------------------------------------------------------------------------------- 0.55W

z Package Thermal Resistance (Note 2)

SC-70 / SC-82, θJA------------------------------------------------------------------------------------------------- 400°C/W

SOT-23-3, θJA-------------------------------------------------------------------------------------------------------- 250°C/W

SOT-23-5, θJA-------------------------------------------------------------------------------------------------------- 250°C/W

SOT-89, θJA---------------------------------------------------------------------------------------------------------- 180°C/W

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

z Storage Temperature Range ------------------------------------------------------------------------------------- −65°C to 150°C

z ESD Susceptibility (Note 3)

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

+ 0.3V)

Recommended Operating Conditions (Note 4)

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

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

Electrical Characteristics

(VDD = 3V, unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Operating VDD (V

Supply Current IDD V

Reset Threshold VTH T

Threshold Voltage Accuracy ΔVTH T

VDD Drop to Reset Delay tRD Drop = VTH −125mV -- 20 -- μs

Reset Active Time Out Period

RESET Output Voltage Low (Note 5)

Hysteresis Width V

) Range VDD 0.9 -- 6 V

OUT

= 3V, VDD = 4.5V, TA = 27°C -- 3 8 μA

= 27°C -- 1.2 to 5 -- V

= 27°C −1.5 -- 1.5 %

RT9818A/E -- 0 --

RT9818B/F 35 55 75

RT9818C/G 143 220 297

RT9818D/H

≥ 1.02 x VTH

292 450 608

3 = VDD < VTH I

-- 0.01VTH 0.016VTH V

HYS

> 3.5mA -- -- 0.4 V

SINK

DS9818-10 May 2013 www.richtek.com

RT9818

Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are

stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in

the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may

affect device reliability.

Note 2. θ

is measured at T

Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. The voltage V

through the pull-up resistor. For typical application (R=100kΩ), V

= 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3.

can be calculated by VOL = VDD − Ir * R. Where R is the pull-up resistor and Ir is the current flowing

is less than 0.2V.

DS9818-10 May 2013www.richtek.com

Typical Operating Characteristics

)

RT9818

Nch Driver Output Current vs. V

2.4

RT9818A-12

= 1.1V

2.0

1.6

1.2

0.8

Output Current (mA

0.4

0.0 0 0.3 0.6 0.9 1.2 1.5

= 1V

VDS (V)

Nch Driver Out put Current vs. V

120

RT9818A-45

100

Output Current (mA

012345

VDS (V)

VDD = 4.4V = 4V = 3.5V = 3V = 2.5V = 2V = 1.5V

Nch Driver Output Cu rrent vs. V

RT9818C-30

Output Current (mA

0 0.5 1 1.5 2 2.5 3 3.5

= 1.5V

= 2V

= 2.5V

= 2.8V

VDS (V)

Output Voltage v s. Input Voltage

RT9818

Output Voltage (V)

0123456

1.2V

Input Voltage (V)

4.5V

Supply Current vs. Input Voltage

RT9818A-12

Supply Current (μA

0123456

80°C

25°C

−30°C

Input Voltage (V)

4.0

3.5

3.0

2.5

2.0

1.5

1.0

Supply Current (μA

0.5

0.0

Supply Current vs. Input Voltage

RT9818C-30

80°C

25°C

−30°C

0123456

Input Voltage (V)

DS9818-10 May 2013 www.richtek.com

RT9818

)

Supply Current vs . Input Voltage

4.0

RT9818A-45

3.5

3.0

2.5

2.0

1.5

1.0

Supply Current (μA

0.5

0.0 0123456

80°C 25°C

-30°C

Input Voltage (V)

Power Down Reset Delay vs. Temperature

RT9818C-30

Power Down Reset Delay vs. Temperature

RT9818A-12

Power Down Reset Delay (µs

-50 -25 0 25 50 75 100 125

DROP

= 200mV

DROP

= 150mV

= 250mV

Temperature (°C)

Power Down Reset Delay vs. Temperature

RT9818A-45

Power Down Reset Delay (µs

-50 -25 0 25 50 75 100 125

DROP

= 200mV

DROP

= 150mV

= 250mV

Temperature (°C)

Reset Threshold Deviation vs. Temperature

RT9818

Reset Threshold (V)

-50 -25 0 25 50 75 100 125

Temperature (°C)

4.5V

4.2V

2.2V

1.2V

Power Down Reset Delay (µs) 1

-50-250 255075100125

DROP

= 200mV

DROP

= 150mV

= 250mV

Temperature (°C)

Nch Driver Sink Current vs. Input Voltage

RT9818C-30, V

(mA)

SINK

Sink Current I

0 0.5 1 1.5 2 2.5 3 3.5

= 0.5V

25°C

Input Voltage (V)

−30°C

80°C

DS9818-10 May 2013www.richtek.com

RT9818

)

Nch Driver Sink Current vs. Input Voltage

RT9818A-45, V

= 0.5V

−30°C

25°C

(mA)

SINK

80°C

Sink Current I

012345

Input Voltage (V)

Power Up Reset Time-Out vs. Temperature

100

RT9818A

= 5V

= 4.5V

Power Up Reset Time-Out vs. Temperature

500

RT9818C

400

= 2.9V

300

200

100

= 3V

Power Up Reset Time-Out (ms)

-50 -25 0 25 50 75 100 125

Temperature (°C)

Output Delay Time vs. Load Capacitance

1000

RT9818

100

= 1.2V

0.1

Power Up Reset Time-Out (µs)

-50 -25 0 25 50 75 100 125

Temperature (°C)

Nch Driver Output Current vs. V

160

RT9818G-31

140

120

100

Nch Driver Output Current (mA) 1

0123456

VDS (V)

VDD = 6V = 5.5V = 5V = 4.5V = 4V = 3.5V

Output Delay Time (ms

= 4.5V

0.01

0.0001 0.0010 0.0100 0.1000 1.0000

Load Capacitance (µF)

Nch Drive r Output Current vs. Input Voltage

RT9818G-31 VDS = 0.5V

Nch Driver Output Current (mA) 1

01234 56

Input Voltage (V)

−30°C

25°C

80°C

DS9818-10 May 2013 www.richtek.com

RT9818

)

Power Down Reset Time-Out vs. Temperature

500

RT9818G-31

400

300

200

100

Power Down Reset Time-Out (ms

-50 -25 0 25 50 75 100 125

Temperature (°C)

Power Down Reset Time-Out vs. Temperature

RT9818G-31

= 200mV

DROP

Power Down Reset Time-Out (µs

-50-250 255075100125

Temperature (°C)

DROP

= 150mV

= 250mV

Output Voltage v s . Input Voltage

RT9818G-31

Output Voltage (V)

0123456

Input Voltage (V)

Threshold Voltage vs. Temperature

4.40

RT9818A-42

4.35

4.30

4.25

4.20

4.15

4.10

Threshold Voltage (V) 1

4.05

4.00

-50-250 255075100125

Rising

Falling

Temperature (°C)

Threshold Voltage vs. Temperature

2.40

RT9818C-22

2.35

2.30

2.25

2.20

2.15

2.10

Threshold Voltage (V) 1

2.05

2.00

-50 -25 0 25 50 75 100 125

Rising

Falling

Temperature (°C)

DS9818-10 May 2013www.richtek.com

Application Information

Multiple Supplies

Mainly, the pull-up connected to the RT9818 will connect

to the supply voltage that is being monitored at the IC's

VDD pin. However, some systems may use the open-

drain output to level-shift from the monitored supply to

reset circuitry powered by some other supply.

Benefits of Highly Accurate Reset Threshold

Most μP supervisor ICs have reset threshold voltages

between 1% and 1.5% below the value of nominal supply

voltages. This ensures a reset will not occur within 1% of

the nominal supply, but will occur when the supply is 1.5%

below nominal.

RT9818

DS9818-10 May 2013 www.richtek.com

RT9818

Outline Dimension

Dimensions In Millimeters Dimensions In Inch es

Symbol

Min Max Min Max

A 0.800 1.100 0.031 0.044

A1 0.000 0.100 0.000 0.004

B 1.150 1.350 0.045 0.054

b 0.150 0.400 0.006 0.016

C 1.800 2.450 0.071 0.096

D 1.800 2.250 0.071 0.089

e 1.300 0.051

H 0.080 0.260 0.003 0.010

L 0.210 0.460 0.008 0.018

SC-70-3 Surface Mount Package

DS9818-10 May 2013www.richtek.com

RT9818

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Max

A 0.800 1.100 0.031 0.043

A1 0.000 0.100 0.000 0.004

B 1.150 1.350 0.045 0.053

b 0.150 0.400 0.006 0.016

b1 0.350 0.500 0.014 0.020

C 1.800 2.450 0.071 0.096

D 1.800 2.200 0.071 0.087

e 1.300 0.051

H 0.080 0.260 0.003 0.010

L 0.200 0.460 0.008 0.018

SC-82 Surface Mount Package

DS9818-10 May 2013 www.richtek.com

RT9818

Dimensions In Millimeters Dimensions In Inch es

Symbol

Min Max Min Max

A 0.889 1.295 0.035 0.051

A1 0.000 0.152 0.000 0.006

B 1.397 1.803 0.055 0.071

b 0.356 0.508 0.014 0.020

C 2.591 2.997 0.102 0.118

D 2.692 3.099 0.106 0.122

e 1.803 2.007 0.071 0.079

H 0.080 0.254 0.003 0.010

L 0.300 0.610 0.012 0.024

SOT-23-3 Surface Mount Package

DS9818-10 May 2013www.richtek.com

RT9818

Dimensions In Millimeters Dimensions In Inch e s

Symbol

Min Max Min Max

A 0.889 1.295 0.035 0.051

A1 0.000 0.152 0.000 0.006

B 1.397 1.803 0.055 0.071

b 0.356 0.559 0.014 0.022

C 2.591 2.997 0.102 0.118

D 2.692 3.099 0.106 0.122

e 0.838 1.041 0.033 0.041

H 0.080 0.254 0.003 0.010

L 0.300 0.610 0.012 0.024

SOT-23-5 Surface Mount Package

DS9818-10 May 2013 www.richtek.com

RT9818

Dimensions In Millimeters Dimensions In Inch es

Symbol

Min Max Min Max

A 1.397 1.600 0.055 0.063

b 0.356 0.483 0.014 0.019

B 2.388 2.591 0.094 0.102

b1 0.406 0.533 0.016 0.021

C 3.937 4.242 0.155 0.167

C1 0.787 1.194 0.031 0.047

D 4.394 4.597 0.173 0.181

D1 1.397 1.753 0.055 0.069

e 1.448 1.549 0.057 0.061

H 0.356 0.432 0.014 0.017

3-Lead SOT-89 Surface Mount Package

Richtek Technology Corporation

5F, No. 20, Taiyuen Street, Chupei City

Hsinchu, Taiwan, R.O.C.

Tel: (8863)5526789

Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should

obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot

assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be

accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third

parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.

DS9818-10 May 2013www.richtek.com

Richtek RT9818A-13PY, RT9818A-14PV, RT9818A-15PV, RT9818A-16PV, RT9818A-18GV Schematic [ru]

Specifications and Main Features

Frequently Asked Questions

User Manual