R3119N970A-TR-F - Ricoh Corporation

R3119N SERIES

50V INPUT VOLTAGE TYPE VOLTAGE DETECTO R

NO.EA-187-090115

OUTLINE

R3119N Series are CMOS process based (advantageous for low supply current) input voltage range (50V)

voltage detector with high detector threshold accuracy and ultra-low supply current.Each of those ICs consists of

a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver and a hysteresis

circuit.

There are two types: R3119NxxxA has the CD pin of external IC for setting the release-delay-time.

R3119NxxxE has the SENSE pin of external IC.

The supply current of IC is only 3.3μA. The detector threshold is possible to set range from 2.3V to 12V

internally with high accuracy (1.5%). The output type is Nch Open drain type.

Since the package for these ICs is small SOT-23-5, high density mounting of the ICs on board is possible.

FEATURES

• Supply Current································································ Typ.3.3μA

• Operating Voltage··························································· 1.5V~36.0V(CD pin type: R3119NxxxA)

2.1V~6.0V(SENSE pin type: R3119NxxxE)

• High Detect Voltage Accuracy ········································ ±1.5% (Ta=25°C)

• Detect Voltage Range····················································· Stepwise setting with a step of 0.1V in the range of

2.3V to 12.0V is possible

• Released Delay Time (Power ON Reset Delay Time)···· -50~+80%( CD pin type: R3119NxxxA)

• Package·········································································· SOT-23-5

APPLICATIONS

• CPU and logic circuit reset.

• Battery checker.

• Battery back-up circuit.

• Supervising of the power supply voltage of in-vehicle equipment.

R3119x

BLOCK DIAGRAMS

R3119NxxxA R3119NxxxE

SENSE

DOUT

GND

ref

VDD

Vre

Delay

Circuit

VDD

GND

DOUT

SELECTION GUIDE

The detect voltage, version, package, and the taping type for the ICs can be selected at the user’s request.

The selection can be made with designating the part number as shown below;

R3119x xxx x-xx-x ←Part Number

↑ ↑ ↑ ↑ ↑

a b c d e

Code Contents

a Designation of Package Type:

N: SOT-23-5

b Setting Detect Voltage:

Stepwise setting with 0.1V in the range from 2.30V to 12.0V is possible

Designation of Active Type:

A: with CD pin type

E: with SENSE pin type

d Designation of Taping Type:

Ex.TR (refer to Taping Specifications: TR type is the standard direction)

e Designation of composition of pin plating:

-F: Lead free solder plating

R3119x

PIN CONFIGURATION

 SOT-23-5

123

(mark side)

PIN DESCRIPTIONS

R3119N: SOT-23-5

Pin No. Symbol Description

1 VDD Input Pin

2 GND * Ground Pin

3 GND * Ground Pin

4 DOUT VD Output Pin

CDConnecting pin with external capacitor for setting delay time

5 SENSE Voltage Detector SENSE pin

* No. 2 and No.3 pin must be wired to the GND plan when it is mounted on board.

R3119x

ABSOLUTE MAXIMUM RATINGS

Symbol Item Ratings Unit

R3119NxxxA -0.3~50.0

VDD Input Voltage R3119NxxxE -0.3~7.0

DOUT Output Voltage (DOUT pin) -0.3~7.0 V

VCD Output Voltage (CD pin) R3119NxxxA -0.3~7.0 V

VSENSE Input Voltage (SENSE Pin) R3119NxxxE -0.3~50.0 V

IOUT Output Current (DOUT pin) 20 mA

PDPower Dissipation* SOT-23-5 420 mW

Ta Ambient Temperature Range - 40 ~ + 105 °C

Tstg Storage Temperature Range - 55 ~ + 125 °C

* For Power Dissipation, please refer to PACKAGE INFORMATION to be described

ABSOLUTE MAXIMUM RATINGS

Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages

and may degrade the life time and safety for both device and system using the device in the field. The functional operation

at or over these absolute maximum ratings is not assured.

R3119x

ELECTRICAL CHARACTERISTICS

R3119NxxxA (CD pin type)

value indicate -40°C

105°C is checked and guaranteed by design engineering.

Ta=25°C

Symbol Item Conditions Min. Typ. Max. Unit

VDD=(-VDET) – 0.1V 3.3 5.6

ISS Supply Current

VDD=(-VDET) + 1.0V 3.3 5.5 μA

Ta=2 5°Cx 0.985 x 1.015

-VDET Detector Threshold VDD pin

-40°C

105°Cx 0.970 x 1.020

VHYS

Detector Threshold

Hysterisis

3.5 5 6.5 %

tDELAY Output Delay Time VDD=1.5V→(Vset)+2.0V

CD=0.01μF 45 85 150 ms

Δ-VDET

/ΔTa

Detector Threshold

Temperature Coefficient -40°C

105°C ±100 ppm

/°C

VDDH

Maximum Operating

Voltage 36 V

Ta= 2 5 °C 1.2

VDDL

Minimum Operating

Voltage *1 -40°C

105°C

1.25

VDD=1.5V,VDS=0.05V 230

μA

2.3V

(-VDET)<2.6V

VDD=2.2V

VDS=0.5V

2.8

2.6V

(-VDET)<3.0V

VDD =2.5V

VDS=0.5V

3.3

IOUT Output Current

3.0V

(-VDET)

VDD =2.9V

VDS=0.5V

3.5

The specification in is checked and guaranteed by design engineering.

All of unit are tested and specified under load conditions such that Tj ≈ Ta=25°C except for Detector Threshold Temperature

Coefficient item.

*1) This value is the minimum input voltage when the output voltage is 0.1V or less at detection. (the pull-up resistance;100kΩ,

the pull-up voltage;5.0V)

RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)

All of electronic equipment should be designed that the mounted semiconductor devices operate within the

recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating

conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the

semiconductor devices may receive serious damage when they continue to operate over the recommended operating

conditions.

R3119x

R3119NxxxE (SENSE pin type)

value indicate -40°C

105°C is checked and guaranteed by design engineering.

(Ta=25°C)

Symbol Item Conditions Min. Typ. Max. Unit

VDD Input Voltage 2.1 6.0 V

VDD=6.0V

SENSE=(-VDET) - 1.0V 3.3

5.5

ISS Supply Current VDD=6.0V

SENSE=(-VDET) + 1.0V 3.3

5.5

μA

Ta= 2 5 °Cx 0.985 x 1.015

-VDET Detector Threshold SENSE pin

VDD=6.0V -40°C

105°Cx 0.970 x 1.020

VHYS

Detector Threshold

Hysterisis VDD=6.0V 3.5 5 6.5 %

tPLH Output Delay Time VDD=6.0V

SENSE=1.5V→(Vset)+2.0V 15 μs

Δ-VDET

/ΔTa

Detector Threshold

Temperature Coefficient -40°C

105°C ±100 ppm

/°C

VDDH

Maximum Operating

Voltage 36 V

Ta= 2 5 °C 1.2

VDDL

Minimum Operating

Voltage *1 -40°C

105°C

1.25

SENSE < (-VDET)

VDD=2.1V

VDS=0.05V

420

μA

IOUT Output Current SENSE < (-VDET)

VDD=2.2V

VDS=0.5V

2.8 mA

The specification in is checked and guaranteed by design engineering.

All of unit are tested and specified under load conditions such that Tj ≈ Ta=25°C except for Detector Threshold Temperature

Coefficient and Output Delay Time item.

*1) This value is the minimum input voltage when the output voltage is 0.1V or less at detection. (the pull-up resistance;100kΩ,

the pull-up voltage;5.0V)

RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)

All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended

operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if

when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive

serious damage when they continue to operate over the recommended operating conditions.

R3119x

OPERATING

 Diagram for Operation (CD pin type: R3119NxxxA)

▪Due to Nch Open Drain output,

DOUT pin should be pulled-up to an

external voltage level.

Vref Delay

Circuit

VDD

Fig.1 Block Diagram of External Capacitor Connection

I x V DD

Fig.2 Operation Diagram II x V DD

 Explanation of Operation

Step 1. The output voltage is equal to the pull-up voltage.

Step 2. At point “A”, Vref

VDD x (R2+R3) / (R1+R2+R3) is true, as a result, the output of comparator is

reversed from ”L” to “H”, therefore the output voltage becomes the GND level. The voltage level of

Point A means a detector threshold voltage (-VDET)

Step 3. When the input voltage is lower than the minimum operating voltage, the operation of the output

transistor becomes indefinite,. The output voltage is equal to the pull-up voltage.

Step 4. The output voltage is equal to the GND level.

Step 5. At Point “B”, Vref

VDD x R2 / (R1+R2) it true, as a result, the output of comparator is reversed from

“H” to “L”, then the output voltage is equal to the pull-up voltage. The voltage level of Point B means

a released voltage (+VDET)

Output delay time (tDELAY) is calculatable by an external capacitor as the following formula.

DELAY [s] =8.5 x 106 x CD [F]

Step 1 2 3

4 5

Comparator (-) pin

Input Voltage I II II II I

Comparator

Output L H

Indefinite H L

HYS Tr. OFF ON Indefinite ON OFF

Output Nch Tr. OFF ON Indefinite ON OFF

GND

Comparator

R3 HYS Tr.

DOUT

Capacitor

Nch

4513 2

R1+R2

R2+R3

R1+R2+R3

Input Voltage VDD

GND

Detector Threshold

Hysterisis

Released Voltage +

DET

Detector Threshold -

DET

GND

Detector

Delay Time

tRESET

Output Voltage DOUT Output

Delay Time

tDELAY

Pull-up Voltage

Minimum Operating Voltage

DDL

R3119x

 Diagram for Operation (SENSE pin type: R3119NxxxE)

▪Due to Nch Open Drain output,

DOUT pin should be pulled-up to

an external voltage level.

Vref

VDD

DOUT

Fig.3 Block Diagram

I x V SENSE

Fig.4 Operation Diagram II x V SENSE

 Explanation of Operation

Step 1. SENSE voltage is larger than detector threshold; the output voltage is equal to the pull-up voltage.

Step 2. At Point “A”, Vref

VSENSE x (R2+R3) / (R1+R2+R3) is true, as a result, the output of comparator is

reversed from “L” to “H”, then the output voltage is equal to the pull-up voltage. The voltage level of

Point A means a detector threshold voltage (-VDET)

Step 3. At Point “B”, Vref

VSENSE x R2 / (R1+R2) is true, as a result, the output of comparator is reversed

from “H” to “L”, then the output voltage is equal to the pull-up voltage. The voltage level of Point B

means a released voltage (+VDET)

Step 1 2 3

Comparator (-) pin

Input Voltage I II I

Comparator Ourput L H L

HYS Tr. OFF ON OFF

Output Nch Tr. OFF ON OFF

GND

Comparator

R3 HYS Tr. Nch

SENSE

SENSE Voltage VSENSE

Detector Threshold

sterisis

Released Voltage +

DET

Detector Threshold -

DET

GND

Pull-up Voltage

Output

Delay Time

tPLH

R2+R3

R1+R2+R3

Detector

Delay Time

RESET

Output Voltage DOUT

R1+R2

R3119x

 Power Supply Injection Order

The R3119NxxxE Series (SENSE pin type) supervise the voltage of the SENSE pin. VDD pin and SENSE pin

can be used at the same voltage level. Likewise, VDD pin and SENSE pin can be used at the different voltage

level. If the VDD pin and SENSE pin are used at different voltage level, regarding the start-up sequence, force

the voltage level to VDD pin prior to the SENSE pin. If the SENSE pin voltage is equal or more than the released

voltage (+VDET), DOUT pin becomes "H"(Fig.5). Besides, a voltage beyond VDD pin is also acceptable to SENSE

pin.

time

VDD

DOUT

SENSE

Fig.5 Turn On Sequence

+VDET

R3119x

TEST CIRCUITS

 R3119NxxxA (CD pin type)

VDD

GND

DOUT

100kΩ5V

R3119NxxxA

VIN

VDD

GND

DOUT

R3119NxxxA

VIN

Test Circuit for Supply Current Test Circuit for Detector Threshold

VDD

GND

DOUT A

R3119NxxxA

VIN

VDS

Test Circuit for Nch Driver Output Current

VDD

GND

DOUT

100kΩ

R3119NxxxA

1.5V→(-VDET)+2.0V

10nF

Test Circuit for Output Delay Time

R3119x

 R3119NxxxE (SENSE pin type)

VDD

GND

SENSE

DOUT

Test Circuit for Supply Current Test Circuit for Detector Threshold

Test Circuit for Nch Driver Output Current

Test Circuit for Output Delay Time

R3119NxxxE

VDD

GND

SENSE

DOUT

100kΩ

R3119NxxxE

VDD

GND

SENSE

DOUT A

R3119NxxxE

VIN

VDS

VDD

GND

SENSE

DOUT

100kΩ

R3119NxxxE

1.5V→(-VDET)+2.0V

R3119x

TECHNICAL NOTES

When R3119NxxxA/E is used in Fig.A, Fig.X, if the value of R1 is set excessively large, the dropdown voltage

caused by the consumption current of IC itself, may vary the detector threshold and the release voltage. Also, if

the value of R1 is set excessively large, there may be delay in start-up and may cause oscillation generated by

cross conduction current.

When R3119NxxxA is used in Fig. B, if the value of R1 is set excessively large, the dropdown voltage caused

by the consumption current of IC itself, may vary the detector threshold and the released voltage. Also, if the

value of R1 and R2 is set excessively large, there may be delay in start-up and may cause oscillation generated

by cross conduction current.

When R3119NxxxA/E is used in Fig.C, Fig.Y, if the value of R1 is set excessively large, the dropdown voltage

caused by the consumption current of IC itself may vary the detector threshold and the release voltage. Also, if

the value of R1 is set excessively large, there may be delay in start-up and may cause oscillation generated by

cross conduction current. Furthermore, if the value of R1 is set large and the value of R3 is set small, released

voltage level may shift and the minimum operating voltage may differ. If the value of R3 is set excessively small

from R1, release may not occur and may cause oscillation.

3119NxxxA

Series

GND

VDD

DOUT

VDD

R3119NxxxA

Series

GND

VDD

DOUT

VDD

R2 R3119NxxxA

Series

GND

VDD

DOUT

Fig.A Fig.B Fig.C

Fig.X Fig.Y

R3119NxxxE

Series

GND

VDD

DOUT

VDD

SENSE

R3119NxxxE

Series

GND

VDD

DOUT

VDD

SENSE

R3119x

POWER DISSIPATION (SOT-23-5)

This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on

board. This specification is based on the measurement at the condition below:

(Power Dissipation (SOT-23-5) is substitution of SOT-23-6.)

Measurement Conditions

Standard Test Land Pattern

Environment Mounting on Board (Wind velocity=0m/s)

Board Material Glass cloth epoxy plastic (Double sided)

Board Dimensions 40mm * 40mm * 1.6mm

Copper Ratio Top side: Approx. 50%, Back side: Approx. 50%

Through-holes φ 0.5mm * 44pcs

Measurement Result (Ta=25°C, Tjmax=125°C)

Standard Land Pattern Free Air

Power Dissipation 420mW 250mW

Thermal Resistance θja = (125-25°C)/0.42W= 263°C/W 400°C/W

Power Dissipation PD (mW)

600

500

400

300

200

100

00 25 50 75 100 125 150

Ambient Temperature (°C)

Power Dissipation

105

Free Air

On Board

250

420

Measurement Board Pattern

IC Mount Area (Unit: mm)