BU45L474G-TL_技术文档

Datasheet

Voltage Detector IC Series

Counter Timer Built-in

CMOS Voltage Detector IC

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

Key Specifications

¢ Detection voltage:

●General Description

2.3V to 4.8V (Typ.)

0.1V steps

ROHM’s BU45xxxxx and BU46xxxxx series are highly

accurate, low current consumption voltage detector IC

series. Because the counter timer delay circuit is built-in,

an external capacitor for the delay time setting is

unnecessary. Two output types are available (Nch open

drain and CMOS output) and detection voltages range

from 2.3V to 4.8V in increments of 0.1V with fixed delay

time of 200ms and 400ms, that may be selected

according to application.

¢ High accuracy detection voltage:

¢ Low current consumption:

±1.0%

2.3µA (Typ.)

-40°C to +105°C

200ms

¢ Operating temperature range:

¢ Two internal, fixed delay time:

400ms

●Package

●Features

SSOP3

2.92mm x 2.80mm x 1.25mm

¢ Counter Timer Built-in

¢ No delay time setting capacitor required

¢ Low current consumption

●Applications

¢ Two output types (Nch open drain and CMOS output)

¢ Package SSOP3 is similar to SOT-23-3 (JEDEC)

Circuits using microcontrollers or logic circuits that require

a reset

●Typical Application Circuit

V

DD1

V

DD2

DD1

R

L

Micro

controller

Micro

controller

BD46 xxxxx

R

ST

BU45 xxxxx

R

ST

C

L

C

L

Noise-filtering

（

Noise-filtering

（

Capacitor

）

Capacitor

）

GND

（Open Drain Output Type）

（CMOS Output Type）

BU45xxxxx series

BU46xxxxx series

●Connection Diagram

●Pin Descriptions

BU45KxxxG / BU46KxxxG

SSOP3

PIN No.

Symbol

Function

GND

3

VDD

3

1

2

3

GND

VOUT

VDD

GND

Reset Output

Power Supply Voltage

BU45LxxxG / BU46LxxxG

TOP VIEW

PIN No.

Symbol

VOUT

VDD

Function

Reset Output

Power Supply Voltage

GND

2

1

2

1

2

3

VOUT

VDD

GND

VOUT

BU45KxxxG

BU46KxxxG

BU45LxxxG

BU46LxxxG

GND

○Product structure：Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays.

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Ordering Information

B

U

x

x - T

L

Part

Output Type

Package 1

Reset Voltage Value Counter Timer

Package 2

Packaging and

Number

45 : Open Drain

46 : CMOS

23 : 2.3V

Delay Time Settings

0.1V step 2 : 200ms

4 : 400ms

forming specification

TL : Embossed tape

and reel

48 : 4.8V

Package 1 Package 2 Package name

K

L

G

SSOP3 (1pin GND)

SSOP3 (3pin GND)

●Lineup

Table 1. Open Drain Output Type

Counter Timer Delay Time Settings

1-Pin GND

3-Pin GND

200ms

400ms

200ms

400ms

Detection

Voltage

Part

Number

Part

Number

Part

Number

Part

Number

Marking

BU45K482

BU45K472

BU45K462

BU45K452

BU45K442

BU45K432

BU45K422

BU45K412

BU45K402

BU45K392

BU45K382

BU45K372

BU45K362

BU45K352

BU45K342

BU45K332

BU45K322

BU45K312

BU45K302

BU45K292

BU45K282

BU45K272

BU45K262

BU45K252

BU45K242

BU45K232

BU45K484

BU45K474

BU45K464

BU45K454

BU45K444

BU45K434

BU45K424

BU45K414

BU45K404

BU45K394

BU45K384

BU45K374

BU45K364

BU45K354

BU45K344

BU45K334

BU45K324

BU45K314

BU45K304

BU45K294

BU45K284

BU45K274

BU45K264

BU45K254

BU45K244

BU45K234

BU45L482

BU45L472

BU45L462

BU45L452

BU45L442

BU45L432

BU45L422

BU45L412

BU45L402

BU45L392

BU45L382

BU45L372

BU45L362

BU45L352

BU45L342

BU45L332

BU45L322

BU45L312

BU45L302

BU45L292

BU45L282

BU45L272

BU45L262

BU45L252

BU45L242

BU45L232

BU45L484

BU45L474

BU45L464

BU45L454

BU45L444

BU45L434

BU45L424

BU45L414

BU45L404

BU45L394

BU45L384

BU45L374

BU45L364

BU45L354

BU45L344

BU45L334

BU45L324

BU45L314

BU45L304

BU45L294

BU45L284

BU45L274

BU45L264

BU45L254

BU45L244

BU45L234

4.8V

4.7V

4.6V

4.5V

4.4V

4.3V

4.2V

4.1V

4.0V

3.9V

3.8V

3.7V

3.6V

3.5V

3.4V

3.3V

3.2V

3.1V

3.0V

2.9V

2.8V

2.7V

2.6V

2.5V

2.4V

2.3V

bH

bG

bF

bE

bD

bC

bB

bA

aY

eF

eE

eD

eC

eB

eA

dY

dX

dW

dT

dS

hD

hC

hB

hA

gY

gX

gW

gT

gS

nB

nA

mY

mX

mW

mT

mS

mR

mP

mN

mM

mK

mH

mG

mF

mE

mD

mC

mB

mA

kY

aX

aW

aT

gR

gP

gN

gM

gK

gH

gG

gF

dR

dP

dN

dM

dK

dH

dG

dF

aS

aR

aP

aN

aM

aK

aH

aG

aF

gE

gD

gC

gB

gA

fY

dE

dD

dC

dB

dA

cY

aE

kX

aD

aC

aB

aA

kW

kT

fX

fW

fT

kS

cX

kR

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Lineup - Continued

Table 2. CMOS Output Type

Counter Timer Delay Time Settings

1-Pin GND

3-Pin GND

200ms

400ms

200ms

400ms

Detection

Voltage

Part

Number

Part

Number

Part

Number

Part

Number

Marking

BU46K482

BU46K472

BU46K462

BU46K452

BU46K442

BU46K432

BU46K422

BU46K412

BU46K402

BU46K392

BU46K382

BU46K372

BU46K362

BU46K352

BU46K342

BU46K332

BU46K322

BU46K312

BU46K302

BU46K292

BU46K282

BU46K272

BU46K262

BU46K252

BU46K242

BU46K232

BU46K484

BU46K474

BU46K464

BU46K454

BU46K444

BU46K434

BU46K424

BU46K414

BU46K404

BU46K394

BU46K384

BU46K374

BU46K364

BU46K354

BU46K344

BU46K334

BU46K324

BU46K314

BU46K304

BU46K294

BU46K284

BU46K274

BU46K264

BU46K254

BU46K244

BU46K234

BU46L482

BU46L472

BU46L462

BU46L452

BU46L442

BU46L432

BU46L422

BU46L412

BU46L402

BU46L392

BU46L382

BU46L372

BU46L362

BU46L352

BU46L342

BU46L332

BU46L322

BU46L312

BU46L302

BU46L292

BU46L282

BU46L272

BU46L262

BU46L252

BU46L242

BU46L232

BU46L484

BU46L474

BU46L464

BU46L454

BU46L444

BU46L434

BU46L424

BU46L414

BU46L404

BU46L394

BU46L384

BU46L374

BU46L364

BU45L354

BU46L344

BU46L334

BU46L324

BU46L314

BU46L304

BU46L294

BU46L284

BU46L274

BU46L264

BU46L254

BU46L244

BU46L234

4.8V

4.7V

4.6V

4.5V

4.4V

4.3V

4.2V

4.1V

4.0V

3.9V

3.8V

3.7V

3.6V

3.5V

3.4V

3.3V

3.2V

3.1V

3.0V

2.9V

2.8V

2.7V

2.6V

2.5V

2.4V

2.3V

cW

cT

fS

fR

kP

kN

kM

kK

pM

pK

pH

pG

pF

cS

fP

cR

cP

fN

fM

fK

kH

kG

kF

cN

cM

cK

pE

pD

pC

pB

pA

nY

nX

nW

nT

nS

fH

fG

fF

kE

cH

cG

cF

kD

kC

kB

kA

hY

hX

hW

hT

hS

fE

fD

fC

cE

cD

cC

cB

cA

bY

bX

bW

bT

bS

bR

bP

bN

bM

bK

fB

fA

eY

eX

eW

eT

eS

eR

eP

eN

eM

eK

eH

eG

nR

nP

nN

nM

nK

nH

nG

nF

hR

hP

hN

hM

hK

hH

hG

hF

nE

nD

nC

hE

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

ò Absolute maximum ratings (Ta=25°C)

Parameter

Power Supply Voltage

Symbol

Limit

-0.3 to +6.0

GND-0.3 to +6.0

GND-0.3 to VDD+0.3

70

Unit

VDD-GND

V

Nch Open Drain Output

CMOS Output

Output Voltage

VOUT

V

Output Current

Io

mA

mW

°C

*1 *2

Power Dissipation

Pd

700

Operating Temperature

Topr

Tstg

-40 to +105

-55 to +125

Ambient Storage Temperature

°C

*1 Use above Ta=25°C results in a 7.0mW loss per degree.

*2 When mounted on ROHM standard circuit board (70mmx70mmx1.6mm, glass epoxy board).

●Electrical characteristics (Unless Otherwise Specified Ta=-40 to 105°C)

Limit

Parameter

Symbol

Condition

Unit

V

Min.

0.6

Typ.

-

Max.

6.0

VOL≤0.4V, RL=470kΩ, Ta=25~105°C

VOL≤0.4V, RL=470kΩ, Ta=-40~25°C

Operating Voltage Range

VOPL

0.9

6.0

VDET(T)

×0.99

2.475

2.418

2.404

2.970

2.901

2.885

3.267

3.191

3.173

4.158

4.061

4.039

4.752

4.641

4.616

VDET(T)

×1.01

2.525

2.584

2.597

3.030

3.100

3.117

3.333

3.410

3.428

4.242

4.341

4.364

4.848

4.961

4.987

*1

VDD=H‰L, RL=470kΩ

VDET(T)

Ta=25°C

2.5

VDET=2.5V

VDET=3.0V

VDET=3.3V

VDET=4.2V

VDET=4.8V

Ta=-40°C to 85°C

-

Ta=85°C to 105°C

Ta=25°C

-

3.0

Ta=-40°C to 85°C

Ta=85°C to 105°C

Ta=25°C

-

3.3

Detection Voltage

VDET

V

Ta=-40°C to 85°C

Ta=85°C to 105°C

Ta=25°C

-

4.2

Ta=-40°C to 85°C

Ta=85°C to 105°C

Ta=25°C

-

4.8

-

Ta=-40°C to 85°C

Ta=85°C to 105°C

-

Detection Voltage

Temperature coefficient

VDET/∆T -40°C~105°C

-

±50

±360 ppm/°C

VDET(T) VDET(T) VDET(T)

VDD＝L‰H‰L, RL=470kΩ

Hysteresis Voltage

∆VDET

V

×0.03

120

95

×0.05

×0.08

280

460

235

560

920

470

7.00

8.00

Ta=25°C

200

Ta=-40°C to 85°C

Ta=85°C to 105°C

Ta=25°C

-

BU4XXXX2G

CL=100pF,

‘High’ Output

Delay time

85

RL=100kΩ

tPLH

ms

*1,*2,* 3

240

190

170

0.60

1.10

400

-

BU4XXXX4G Ta=-40°C to 85°C

Ta=85°C to 105°C

-

Circuit Current when ON

Circuit Current when OFF

IDD1

IDD2

VDD=VDET-0.2V, VDET=2.3V~4.8V

VDD=VDET+1.0V, VDET=2.3V~4.8V

2.30

2.80

µA

‘High’ Output Voltage (Pch)

‘Low’Output Voltage (Nch)

Leak Current when OFF

VOH

VDD=5.0V, ISOURCE= 6.8mA, VDET(4.3V to 4.8V)

VDD-0.5

-

V

VDD=1.2V, ISINK = 2.0mA

-

0.3

V

VOL

VDD=2.4V, ISINK = 8.5mA, VDET(2.7V to 4.8V)

*1

Ileak

VDD=VDS=6.0V

-

1.0

µA

VDET(T):Standard Detection Voltage (2.3V to 4.8V, 0.1V step)

RL :Pull-up resistor to be connected between VOUT and power supply.

CL :Capacitor to be connected between VOUT and GND.

*1 Guarantee is Ta=25°C.

*2 tPLH:VDD=(VDET(T)-0.5V)‰(VDET(T)+0.5V)

*3 tPLH:VDD=Please set up the rise up time between VDD=V_OPL‰VDET more than 10µs.

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Block Diagrams

VDD

VOUT

Oscillator

Circuit Counter

Timer

Vref

GND

Fig.1 BU45xxxxx Series

VDD

Oscillator

Circuit Counter

Timer

VOUT

Vref

GND

Fig.2 BU46xxxxx Series

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Typical Performance Curves

16

14

12

10

8

6

5

4

3

2

1

0

Ta=-40°C

【BU45K232G】

Ta=105°C

Ta=25°C

6

Ta=105°C

Ta=25°C

4

Ta=-40°C

2

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

DRAIN-SOURCE VOLTAGE:V_DS[V]

VDD SUPPLY VOLTAGE:V_DD[V]

Fig.3 Circuit Current

Fig.4 “Low” Output Current

VDD=1.2V

50

40

30

20

10

0

8

7

6

5

4

3

2

1

0

【BU45K232G】

Ta=25°C

【BU46K232G】

Ta=-40°C

Ta=105°C

Ta=25°C

Ta=105°C

0

1

2

3

4

5

6

7

0

1

2

3

4

5

V

SUPPLY VOLTAGE:V_DD[V]

Fig.6 I/O Characteristics

DD

DRAIN-SOURCE VOLTAGE:VDS[V]

Fig.5 “HIGH” Output Current

VDD=6V

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Typical Performance Curves - Continued

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

2.6

2.5

2.4

2.3

2.2

2.1

[BU45K232G]

【BU45K232G】

Low to high(V _DET+ꢀV _DET

)

High to low(V _DET

)

-40 -20

0

20

40

60

80 100

-40 -20

0

20

40

60

80 100

TEMPERATURE:Ta[°C]

Fig.8 Circuit Current when ON

(VDD=VDET-0.2V)

VDD=2.1V

Fig.7 Detection Voltage

Release Voltage

0.6

0.5

0.4

0.3

0.2

0.1

0

3.5

3.3

3.1

2.9

2.7

2.5

2.3

2.1

1.9

1.7

1.5

【BU45K232G】

-40 -20

0

20 40

60

80 100

-40 -20

0

20

40

60

80 100

TEMPERATURE:Ta[°C]

Fig.10 Operating Limit Voltage

Fig.9 Circuit Current when OFF

(VDD=VDET+1V)

VDD=3.3V

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Typical Performance Curves - Continued

300

280

260

240

220

200

180

160

140

120

100

3

2

1

0

【

BU45K232G】

【

BU45K232G】

-40 -20

0

20

40

60

80 100

-40

-20

0

20

40

60

80

100

TEMPERATURE:Ta[°C]

Fig.11 Output Delay Time

“Low” ”High”

Fig.12 Output Delay Time

‰

“High”‰”Low”

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Application Information

Explanation of Operation

For both the open drain type (Fig.13) and the CMOS output type (Fig.14), the detection and release voltages are used as

threshold voltages. When the voltage applied to the V_DDpins reaches the applicable threshold voltage, the V_OUTterminal

voltage switches from either “High” to “Low” or from “Low” to “High”. Because the BU45xxxxx series uses an open drain

output type, it is necessary to connect a pull-up resistor to V_DDor another power supply if needed [The output “High” voltage

(V_OUT) in this case becomes V_DDor the voltage of the other power supply].

VDD

V

DD

R1

R2

R1

R2

Q2

Q1

Vref

Reset

V

OUT

Oscillator

Circuit Counter

Timer

Oscillator

Circuit Counter

Timer

Reset

VOUT

Q1

R3

GND

Fig.13 (BU45xxxxx Type Internal Block Diagram)

Fig.14 (BU46xxxxx Type Internal Block Diagram)

Reference Data

Examples of Leading (t_PLH) and Falling (t_PHL) Output

Part Number

BU45K232G

BU46K232G

t_PLH[ms]

208

t_PHL[µs]

1.4

208

1.4

V

DD=1.8V

‰2.8V

VDD=2.8V‰1.8V

*This data is for reference only.

The figures will vary with the application, so please confirm actual operating conditions before use.

Timing Waveform

Example: The following shows the relationship between the input voltages V_DDand the output voltage V_OUTwhen the input

power supply voltage V_DDis made to sweep up and sweep down (the circuits are those in Fig. 13 and 14).

1

When the power supply is turned on, the output is unstable from

after over the operating limit voltage (V_OPL) until t_PHL. Therefore it is

possible that the reset signal is not outputted when the rise time of

V^DD

VDET+ΔVDET

VDET

V^DD

V

_DDis faster than t_PHL

.

⑤

2

VOPL

0V

When V_DDis greater than V_OPLbut less than the reset release

voltage (V_DET

+ ∆V_DET), the output voltages will switch to Low.

VOH

3

If V_DDexceeds the reset release voltage (V_DET

+ ∆V_DET), the

tPLH

VOUT

counter timer start and V_OUTswitches from L to H.

tPHL

4

If V_DDdrops below the detection voltage (V_DET) when the power

supply is powered down or when there is a power supply fluctuation,

V_OUTswitches to L (with a delay of t_PHL).

VOL

tPHL

①

②

④

③

5

The potential difference between the detection voltage and the

release voltage is known as the hysteresis width (∆V_DET). The

Fig.15 Timing Waveform

system is designed such that the output does not toggle with power

supply fluctuations within this hysteresis width, thus, preventing

malfunctions due to noise.

Timing may change depending on application and use. Please verify and confirm using practical applications.

TSZ02201-0R7R0G300130-1-2

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Datasheet

BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series

●Circuit Applications

1. Examples of a common power supply detection reset circuit.

Application examples of BU45xxxxx series (Open Drain

output type) and BU46xxxxx series (CMOS output type)

are shown below.

VDD1

VDD2

RL

Micro

controller

BU45xxxxx

RST

CASE1: Power supply of microcontroller (VDD2) differs

from the power supply of the reset detection (V_DD).

1

CL

Use an open drain output Type (BU45xxxxx series)

device with a load resistance R_Las shown Fig.16.

（Noise-filtering

Capacitor）

GND

Fig.16 Open Drain Output Type

CASE2: Power supply of the microcontroller (V_DD1) is

same as the power supply of the reset detection (V_DD1).

Use a CMOS output type (BU46xxxxx) device or an open

drain output type (BU45xxxxx) with pull up resistor

between the output and V_DD1. (As shown Fig.17)

VDD1

Micro

controller

BU46xxxxx

RST

When a capacitance C_Lfor noise filtering is connected to

the V_OUTpin (the reset signal input terminal of the

microcontroller), please take into account the waveform of

the rise and fall of the output voltage (V_OUT).

CL

（Noise-filtering

Capacitor）

GND

Fig.17 CMOS Output Type

2. The following is an example of a circuit application in which an OR connection between two types of detection voltage

resets the microcontroller.

V

DD1

V

DD2

V

DD3

R

L

Micro

controller

BU45xxxxx

R

ST

GND

Fig. 18

To reset the microcontroller when many independent power supplies are used in the system, OR connect an open drain

output type (BU45xxxxx series) to the microcontroller’s input with pull-up resistor to the supply voltage of the

microcontroller (V_DD3) as shown in Fig. 18. By pulling-up to V_DD3, output “High” voltage of micro-controller power supply is

possible.

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Datasheet

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Examples of the power supply with resistor dividers.

In applications wherein the power supply voltage of an IC comes from a resistor divider circuit, an in-rush current will flow

into the circuit when the output level switches from “High” to “Low” or vice versa. In-rush current is a sudden surge of

current that flows from the power supply (VDD) to ground (GND) as the output logic changes its state. This current flow

may cause malfunction in the systems operation such as output oscillations, etc.

V1

R2

I1

VDD

BU45xxxxx

BU46xxxxx

R1

VOUT

CIN

CL

GND

Fig. 19

When an in-rush current (I1) flows into the circuit (Refer to Fig. 19) at the time when output switches from “Low” to “High”,

a voltage drop of I1×R2 (input resistor) will occur in the circuit causing the VDD supply voltage to decrease. When the VDD

voltage drops below the detection voltage, the output will switch from “High” to “Low”. While the output voltage is at “Low”

condition, in-rush current will stop flowing and the voltage drop will be reduced. As a result, the output voltage will switches

again from “Low” to “High” which causes an in-rush current and a voltage drop. This operation repeats and will result to

oscillation.

IDD

In-rush Current

VDD

0

VDET

Fig. 20 Current Consumption vs. Power Supply Voltage

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●Operational Notes

1) Absolute Maximum Ratings

Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit

between pins or an open circuit between pins. Therefore, it is important to consider circuit protection measures, such

as adding a fuse, in case the IC is operated over the absolute maximum ratings.

2) GND Voltage

The voltage of the ground pin must be the lowest voltage of all pins of the IC at all operating conditions. Ensure that

no pins are at a voltage below the ground pin at any time, even during transient condition.

3) Recommended Operating Conditions

These conditions represent a range within which the expected characteristics of the IC can be approximately obtained.

The electrical characteristics are guaranteed under the conditions of each parameter.

4) Bypass Capacitor for Noise Rejection

To help reject noise, put a 1uF capacitor between VDD pin and GND and 1000pF capacitor between VOUT pin and GND.

Be careful when using extremely big capacitor as transient response will be affected.

5) Short Between Pins and Mounting Errors

Be careful when mounting the IC on printed circuit boards. The IC may be damaged if it is mounted in a wrong

orientation or if pins are shorted together. Short circuit may be caused by conductive particles caught between the pins.

6) Operation Under Strong Electromagnetic Field

Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction.

7) The V_DDline impedance might cause oscillation because of the detection current.

8) A V_DDto GND capacitor (as close connection as possible) should be used in high VDD line impedance condition.

9) A V_DDlower than the mininum input voltage puts the VOUT in high impedance state. VOUT must be pulled up to VDD.

10) This IC has extremely high impedance terminals. Small leak current due to the uncleanness of PCB surface might

cause unexpected operations. Application values in these conditions should be selected carefully. If the leakage is

assumed between the V_OUTterminal and the GND terminal, the pull-up resistor should be less than 1/10 of the

assumed leak resistance.

11) External parameters

The recommended parameter range for RL is 50kΩ to 470kΩ. There are many factors (board layout, etc) that can

affect characteristics. Please verify and confirm using practical applications.

12) Power on reset operation

Please note that the power on reset output varies with the V_DDrise up time. Please verify the actual operation.

13) Testing on application boards

When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may

subject the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply

should always be turned off completely before connecting or removing it from the test setup during the inspection

process. To prevent damage from static discharge, ground the IC during assembly and use similar precautions during

transport and storage.

14) Rush current

When power is first supplied to the IC, rush current may flow instantaneously. It is possible that the charge current to

the parasitic capacitance of internal logic may be unstable. Therefore, give special consideration to power coupling

capacitance, power wiring, width of GND wiring, and routing of connections.

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Datasheet

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●Physical Dimension, Tape and Reel Information

Package Name

SSOP3F

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●Revision History

Date

Revision

Changes

24.Jan.2013

13.Feb.2013

001

002

New Release

Change max limit of IDD1 and IDD2.

Change min and max limits of TPLH. Add rows to the table of Electrical

Characteristics.

17.May.2013

003

Change max limit of Leak Current when OFF

Modify the sentence structure in General Description and Operational Notes.

Change limits for VDET at VDET=2.5V,3.0V,3.3V,4.2V,4.8V

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Notice

●General Precaution

1) Before you use our Products, you are requested to carefully read this document and fully understand its contents.

ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use of any

ROHM’s Products against warning, caution or note contained in this document.

2) All information contained in this document is current as of the issuing date and subject to change without any prior

notice. Before purchasing or using ROHM’s Products, please confirm the latest information with a ROHM sales

representative.

●Precaution on using ROHM Products

1) Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,

OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you

intend to use our Products in devices requiring extremely high reliability (such as medical equipment, transport

equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car

accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or

serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.

Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any

damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific

Applications.

2) ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor

products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate

safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which

a failure or malfunction of our Products may cause. The following are examples of safety measures:

[a] Installation of protection circuits or other protective devices to improve system safety

[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure

3) Our Products are designed and manufactured for use under standard conditions and not under any special or

extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way

responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any

special or extraordinary environments or conditions. If you intend to use our Products under any special or

extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of

product performance, reliability, etc, prior to use, must be necessary:

[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents

[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust

[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,

H2S, NH3, SO2, and NO2

[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves

[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items

[f] Sealing or coating our Products with resin or other coating materials

[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of

flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning

residue after soldering

[h] Use of the Products in places subject to dew condensation

4) The Products are not subject to radiation-proof design.

5) Please verify and confirm characteristics of the final or mounted products in using the Products.

6) In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse) is applied,

confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power

exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect

product performance and reliability.

7) De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual

ambient temperature.

8) Confirm that operation temperature is within the specified range described in the product specification.

9) ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in

this document.

Notice - Rev.004

Daattaasshheeeett

●Precaution for Mounting / Circuit board design

1) When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product

performance and reliability.

2) In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the

ROHM representative in advance.

For details, please refer to ROHM Mounting specification

●Precautions Regarding Application Examples and External Circuits

1) If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the

characteristics of the Products and external components, including transient characteristics, as well as static

characteristics.

2) You agree that application notes, reference designs, and associated data and information contained in this document

are presented only as guidance for Products use. Therefore, in case you use such information, you are solely

responsible for it and you must exercise your own independent verification and judgment in the use of such information

contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses

incurred by you or third parties arising from the use of such information.

●Precaution for Electrostatic

This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper

caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be

applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,

isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).

●Precaution for Storage / Transportation

1) Product performance and soldered connections may deteriorate if the Products are stored in the places where:

[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2

[b] the temperature or humidity exceeds those recommended by ROHM

[c] the Products are exposed to direct sunshine or condensation

[d] the Products are exposed to high Electrostatic

2) Even under ROHM recommended storage condition, solderability of products out of recommended storage time period

may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is

exceeding the recommended storage time period.

3) Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads

may occur due to excessive stress applied when dropping of a carton.

4) Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of

which storage time is exceeding the recommended storage time period.

●Precaution for Product Label

QR code printed on ROHM Products label is for ROHM’s internal use only.

●Precaution for Disposition

When disposing Products please dispose them properly using an authorized industry waste company.

●Precaution for Foreign Exchange and Foreign Trade act

Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,

please consult with ROHM representative in case of export.

●Precaution Regarding Intellectual Property Rights

1) All information and data including but not limited to application example contained in this document is for reference

only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any

other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable

for infringement of any intellectual property rights or other damages arising from use of such information or data.:

2) No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any

third parties with respect to the information contained in this document.

Notice - Rev.004

Daattaasshheeeett

●Other Precaution

1) The information contained in this document is provided on an “as is” basis and ROHM does not warrant that all

information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or

liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or

concerning such information.

2) This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.

3) The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written

consent of ROHM.

4) In no event shall you use in any way whatsoever the Products and the related technical information contained in the

Products or this document for any military purposes, including but not limited to, the development of mass-destruction

weapons.

5) The proper names of companies or products described in this document are trademarks or registered trademarks of

ROHM, its affiliated companies or third parties.

Notice - Rev.004


型号：	BU45L474G-TL
厂家：	ROHM
描述：	Power Supply Support Circuit, 计数器
文件：	总17页 (文件大小：466K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

BU45L474G-TL [ROHM]

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