BD9702T/T-V5 - ROHM Co., Ltd. - Datasheet.Directory

1/16

www.rohm.com 2009.04- Rev.B

Single-chip Type with Built-in FET Switching Regulator Series

Simple Step-down

Switching Regulators

with Built-in Power MOSFET

BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5

●Description

The BD9701/BD9703/BD9 70 2 are single-channel step-down switching regulator capable of PWM operation.

The Pch MOS FET is built in for high efficien cy in small load area.Lower electricity consumption of op erating current 4mA

(Typ) and stand-by current 0uA(Typ) is realiz ed by adopting Bi-CMOS process.

●Features

1) Maximum switching current: 1.5A(BD9701/BD9703), 3A(BD9702)

2) Built-in Pch FET ensures high efficiency

3) Output voltage adjustable via external resistors

4) High switching frequency: 100kHz (BD9701), 300kHz(B D9703), 110kHz(BD9702)

5) Overcurrent and thermal shutdown protection circuits built in

6) ON/OFF control via STBY pin

7) Small surface mount TO252-5 package (only BD9701FP, BD9703FP)

●Applications

TVs, printers, DVD players, projectors, gaming devices, PCs, car audio/navigation systems, ETCs, communication equipment,

AV products, office equipment, industrial dev ices, and more.

●Line Up

BD9701FP/CP-V5/T/T-V5 BD9703FP/CP-V5/T/T-V5 BD9702CP-V5/T/T-V5

Output Current 1.5A 3.0A

Input Voltage 8 or Vo+3 ～ 36V

Switching Frequency 100kHz (fixed) 300kHz (fixed) 110kHz (fixed)

External Synchr onization ×

Stand-by Function ○

Operating Temperature -40 ～ +85℃

Package TO252-5/TO220CP-V5/TO220FP-5/TO220FP-5 (V5) TO220CP-V5/TO220FP-5/TO220FP-5 (V5)

No.09027EBT01

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

2/16

www.rohm.com 2009.04- Rev.B

●Absolute Maximum Ratings (Ta＝25℃)

Parameter Symbol Ratings Unit

Supply Voltage (VCC-GND) VCC 36 V

STBY-GND VSTBY 36 V

OUT-GND VO 36 V

INV-GND VINV 10 V

Maximum Switching Current BD9701/BD9703 Iout 1.5 A

BD9702 3

Power Dissipation

TO252 Pd 0.8 (*1) W

TO220 2(*2)

Operating Temperature Topr -40～+85 ℃

Storage Temperature Tstg -55～+150 ℃

*1 Without external heat sink, the power dissipation reduces by 6.4mW/℃ over 25℃.

*2 Without external heat sink, the power dissipation reduces by 16.0mW/℃ over 25℃.

Reduced by 160mW/℃, when mounted on Infinity size heatsink.

●Operating Conditions(Ta=-40～+85℃)

Parameter Symbol Limit Unit

MIN TYP MAX

Input Voltage VCC 8.0 or Vo+3(*3) - 35.0 V

Output Voltage Vo 1.0 - 32 V

*3The minimum value of an input voltage is the higher either 8.0V or Vo+3

●Electrical Characteristics

○BD9701FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25℃,VCC=12V,Vo=5V,STBY=3V)

Parameter Symbol

Limit Unit Conditions

MIN TYP MAX

Output ON Resistance Ron - 1.0 1.5 Ω design guarantee

Efficiency η - 86 - % Io＝0.5A design guarantee

Switching Frequency fosc 80 100 120 kHz

Load Regulation ΔVOLOAD - 10 40 mV VCC=20V,Io=0.5～1.5A

Line Regulation ΔVOLINE - 40 100 mV VCC=10～30V,Io=1.0A

Over Current Protection Limit Iocp 1.6 - - A

INV Pin Threshold Voltage VINV 0.98 1.00 1.02 V

INV Pin Threshold Voltage

Thermal Variation ΔVINV - ±0.5 - % Tj=0～85℃ design guarantee

INV Pin Input Current IINV - 1 - μA VINV=1.0V

STBY Pin

Threshold Voltage ON VSTBYON 2.0 - 36 V

OFF VSTBYOFF -0.3 - 0.3 V

STBY Pin Input Current Istby 5 25 50 μASTBY=3V

Circuit Current Icc - 4 12 mA

Stand-by Current Ist - 0 5 μASTBY＝0V

This product is not designed to be resistant to radiation.

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

3/16

www.rohm.com 2009.04- Rev.B

●Electrical Characteristics

○BD9703FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25℃,VCC=12V,Vo=5V,STBY=3V)

Parameter Symbol

Limit Unit Conditions

MIN TYP MAX

Output ON Resistance Ron - 1.0 1.5 Ω design guarantee

Efficiency η - 86 - % Io＝0.5A design guarantee

Switching Frequency fosc 270 300 330 kHz

Load Regulation ΔVOLOAD - 10 40 mV VCC=20V,Io=0.5～1.5A

Line Regulation ΔVOLINE - 40 100 mV VCC=10～30V,Io=1.0A

Over Current Protection Limit Iocp 1.6 - - A

INV Pin Threshold Voltage VINV 0.98 1.00 1.02 V

INV Pin Threshold Voltage

Thermal Variation ΔVINV - ±0.5 - % Tj=0～85℃ design guarantee

INV Pin Input Current IINV - 1 - μA VINV=1.0V

STBY Pin

Threshold Voltage ON VSTBYON 2.0 - 36 V

OFF VSTBYOFF -0.3 - 0.3

V

STBY Pin Input Current Istby 5 25 50 μASTBY=3V

Circuit Current Icc - 5 12 mA

Stand-by Current Ist - 0 5 μASTBY＝0V

●Electrical Characteristics

○BD9702FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25℃,VCC=12V,Vo=5V,STBY=3V)

Parameter Symbol

Limit Unit Conditions

MIN TYP MAX

Output ON Resistance Ron - 0.5 1.5 Ω design guarantee

Efficiency η - 86 - % Io＝1A design guarantee

Switching Frequency fosc 88 110 132 kHz

Load Regulation ΔVOLOAD - 10 40 mV VCC=20V,Io=1～3A

Line Regulation ΔVOLINE - 40 100 mV VCC=10～30V,Io=1.0A

Over Current Protection Limit Iocp 3.2 - - A

INV Pin Threshold Voltage VINV 0.98 1.00 1.02 V

INV Pin Threshold Voltage

Thermal Variation ΔVINV - ±0.5 - % Tj=0～85℃ design guarantee

INV Pin Input Current IINV - 1 - μA VINV=1.0V

STBY Pin

Threshold Voltage ON VSTBYON 2.0 - 36 V

OFF VSTBYOFF -0.3 - 0.3 V

STBY Pin Input Current Istby 5 25 50 μASTBY=3V

Circuit Current Icc - 4 12 mA

Stand-by Current Ist - 0 5 μASTBY＝0V

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

4/16

www.rohm.com 2009.04- Rev.B

40

50

60

70

80

90

100

10 100 1000

OUTPUT CURRENT : IOUT[A]

EFFICIENCY η: [%]

0

0.5

1

1.5

2

2.5

3

3.5

00.511.52

SWITCHING CURRENT : ISW[A]

OUTPUT VOLTAGE : VDS[V]

0.980

0.990

1.000

1.010

1.020

-10 10 30 50 70 90

AMBIENT TEMPERATURE : Ta [℃]

INV THRESHOLD VOLTAGE : VINV[V]

●Characteristic Data

○BD9701FP/CP-V5/T/T-V5

0

1

2

3

4

5

6

01234

OUTPUT CURRENT IOUT : [A]

OUTPUT VOLTAGE : VO [V]

90

95

100

105

110

-101030507090

AMBIENT TEMPERATURE : Ta [℃]

OSC FREQUENCY : FOSC　[ｋHz]

4.9

4.95

5

5.05

5.1

0 200 400 600 800 1000

OUTPUT CURRENT : IOUT[A]

OUTPUT VOLTAGE : VO [V]

4.900

4.950

5.000

5.050

5.100

0 10203040

INPUT VOLTAGE : VCC [V]

OUTPUT VOLTAGE : VO [V]

VCC=30V

VCC=20V

VCC=10V

90

95

100

105

110

0 10203040

INPUT VOLTAGE : VCC [V]

OSC FREQUENCY : FOSC　[ｋHz]

Fig.1

EFFICIENCY-LOAD CURRENT

Fig.2

OCP VCC=20V Fig.3

fosc-Ta

Fig.4

OUTPUT VOLTAGE-LOAD CURRENT Fig.5

OUTPUT VOLTAGE-INPUT VOLTAGE

(Vo=5V,Ro=5ohm)

Fig.6

CIRCUIT CURRENT-INPUT VOLTAGE

NO LOAD

Fig.7

VOUT～OUT VOLTAGE-DRAIN CURRENT Fig.8

fosc-INPUT VOLTAGE Fig.9

INV THRESHOLD VOLT AGE-Ta

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

10 15 20 25 30 35

INPUT VOLTAGE : VCC [V]

CIRCUIT CURRENT ; [mA]

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

5/16

www.rohm.com 2009.04- Rev.B

40

50

60

70

80

90

100

10 100 1000 10000

OUTPUT CURRENT : IOUT[A]

EFFICIENCY η: [%]

0

1

2

3

4

5

6

0123456

OUTPUT CURRENT : IOUT[A]

OUTPUT VOLTAGE : VO [V]

4.90

4.95

5.00

5.05

5.10

0 500 1000 1500 2000 2500 3000

OUTPUT CURRENT : IOUT[A]

OUTPUT VOLTAGE : VO [V]

VCC=10V

VCC=20V

VCC=30V

4.90

4.95

5.00

5.05

5.10

010203040

INPUT VOLTAGE : VCC [V]

OUTPUT VOLTAGE : VO [V]

0.0

0.5

1.0

1.5

2.0

0 0.5 1 1.5 2 2.5 3

SWITCHING CURRENT : ISW[A]

OUTPUT VOLTAGE : VDS[V]

100

105

110

115

120

0 10203040

INPUT VOLTAGE : VCC [V]

OSC FREQUENCY : FOSC　[ｋHz]

0.98

0.99

1.00

1.01

1.02

-10 10 30 50 70 90

AMBIENT TEMPERATURE : Ta [℃]

INV THRESHOLD VOLTAGE : VINV[V]

100

105

110

115

120

- 10 10 30 50 70 90

[kHz] OSC FREQUENCY : FOSC

AMBIENT TEMPERATURE : Ta [℃]

●Characteristic Data

○BD9702FP/CP-V5/T/T-V5

0

1

2

3

4

5

10 15 20 25 30 35

INPUT VOLTAGE : VCC [V]

CIRCUIT CURRENT ; [mA]

Fig.10

EFFICIENCY-LOAD CURRENT Fig.11

OCP VCC=20V Fig.12

fosc-Ta

Fig.13

OUTPUT VOLTAGE-LOAD CURRENT Fig.14

OUTPUT VOLTAGE-INPUT VOLTAGE

(Vo=5V,Ro=5ohm)

Fig.15

CIRCUIT CURRENT-

INPUT VOLTAGE NO LOAD

Fig.16

VOUT～OUT VOLTAGE-DRAIN CURRENT Fig.17

fosc-INPUT VOLTAGE Fig.18

INV THRESHOLD VOLT AGE-Ta

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

6/16

www.rohm.com 2009.04- Rev.B

0

1

2

3

4

5

10 15 20 25 30 35

INPUT VOLTAGE : VCC [V]

CIRCUIT CURRENT ; [mA]

●Characteristic Data

○BD9703FP/CP-V5/T/T-V5

40

50

60

70

80

90

100

10 100 1000

OUTPUT CURRENT : IOUT[A]

EFFICIENCY η: [%]

0

1

2

3

4

5

6

01234

OUTPUT CURRENT : IOUT[A]

OUTPUT VOLTAGE : VO [V]

270

285

300

315

330

-10 10 30 50 70 90

AMBIENT TEMPERATURE : Ta [℃]

OSC FREQUENCY : FOSC　[ｋHz]

4.9

4.95

5

5.05

5.1

0 200 400 600 800 1000

OUTPUT CURRENT : IOUT[A]

OUTPUT VOLTAGE : VO [V]

VCC=30V

VCC=20V

VCC=10V

4.90

4.95

5.00

5.05

5.10

0 10203040

INPUT VOLTAGE : VCC [V]

OUTPUT VOLTAGE : VO [V]

0

0.5

1

1.5

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6

SWITCHING CURRENT : ISW[A]

OUTPUT VOLTAGE : VDS[V]

270

285

300

315

330

0 10203040

INPUT VOLTAGE : VCC [V]

OSC FREQUENCY : FOSC　[ｋHz]

0.98

0.99

1.00

1.01

1.02

-10 10 30 50 70 90

AMBIENT TEMPERATURE : Ta [℃]

INV THRESHOLD VOLTAGE : VINV[V]

Fig.19

EFFICIENCY-LOAD CURRENT Fig.20

OCP VCC=20V Fig.21

fosc-Ta

Fig.22

OUTPUT VOLTAGE-LOAD CURRENT Fig.23

OUTPUT VOLTAGE-INPUT

VOLTAGE (Vo=5V,Ro=5ohm)

Fig.24

CIRCUIT CURRENT-INPUT

VOLTAGE NO LOAD

Fig.25

VOUT～OUT

VOLTAGE-DRAIN CURRENT

Fig.26

fOSC-INPUT VOLTAGE Fig.27

INV THRESHOLD VOLT AGE-Ta

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

7/16

www.rohm.com 2009.04- Rev.B

●Block Diagram

BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T-V5, BD9702CP-V5/T/T-V5

●Pin Description

(*2)FIN is assigned in the case of TO252-5.

Pin No. Pin Name Function

1 VCC Input Power Supply Pin

2 OUT Internal Pch FET Drain Pin

3,FIN(*2) GND Ground

4 INV Output Voltage Feedback Pin

5 STBY ON/OFF Control Pin

VREF

OSC

1

2

DRIVER

PWM COMP

CTL

LOGIC

TSD

Error AMP

4

INV

OUT

GND

STBY 5

VCC

OCP

STBY

3

TO252-5 Pac kage Dimensions (mm)

TO220FP-5 Package Dimensions (mm) TO220FP-5(V5) Package Dimensions (mm)

TO220CP-

V

5 Package Dimensions (mm)

Fig.28 Block Diagram

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

8/16

www.rohm.com 2009.04- Rev.B

●Block Function Explanation s

・VREF

Generates the regulated voltage from VCC input, compensated for temperature.

・OSC

Generates the triangular wave oscillation frequency using an internal resistors and capa citor. Used for PWM comp arator input.

・Error AMP

This block, via the INV pin, detects the resistor-divided output voltage, compares this with the reference voltage, then

amplifies and outputs the difference.

・PWM COMP

Outputs PWM signals to the Driver block, which converts the error amp output voltage to PWM form.

・DRIVER

This push-pull FET driver powers the internal Pch MOSFET, which accepts direct PWM input.

・STBY

Controls ON/OFF operation via the STBY pin. The output is ON when STBY is High.

・Thermal Shutdown (TSD)

This circuit protects the IC against thermal runaway and damage due to excessive heat. A thermal sensor detects the

junction temperature and switches the output OFF once the temperature exceeds a threshold value (175deg). Hysteresis

is built in (15deg) in order to prevent malfunctions due to temperature fluctuations.

・Over Current Protection (OCP)

The OCP circuit detects the voltage difference between VCC and OUT by measuring the current through the intern al Pch

MOSFET and switches the output OFF once the voltage reaches the threshold value. The OCP block is a self-recovery

type (not latch).

●Timing Chart

Error AMP OUTPUT

OUTPIN

OSC

(Internal Oscillation Wave)

OUTPUT

VCC PIN

VOLTAGE WAVE

Fig.29 Timing Chart

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

9/16

www.rohm.com 2009.04- Rev.B

●Notes for PCB layout

Fig.30 Layout

• Place capacitors between VCC and Ground, and the Schottky diode as close as possible to the IC to reduce noise and

maximize efficiency.

• Connect resistors between INV and Ground, and the output capacitor filter at the same Ground potential in order to stabilize

the output voltage.

●Application component selection and settings

Inductor L1

If the winding resistance of the choke coil is too high, the efficiency may deteriorate.

As the overcurrent protection operates over minimum 1.6A (BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T-V5) or 3.2A

minimum (BD9701CP-V5/T/T-V5), attention must be paid to the heating of the inductor due to overload of short-circulated

load.

Note that the current rating for the coil should be higher tha n IOUT(MAX)＋⊿IL. Iout (MAX): maximum load curr ent

If you flow more than maximum current rating, coil will become overload, and cause magnetic saturation, and those

account for efficiency deterioration. Select from enough curr ent rating of coil which doesn’t over peak current.

L1:inductor value, VCC:maximum input voltage, VOUT:output voltage, ⊿IL:coil ripple current value, fosc:oscillation

frequency

Shottky Barrier Diodes D1

A Schottky diode with extremely low forward voltage should be used. Selection should be based on the following

guidelines regarding maximum forward current, reverse voltage, and power dissipation:

・The maximum current rating is higher tha n the combined maximum load current and coil ripple current (⊿IL).

・The reverse voltage rating is higher than t he VIN value.

・Power dissipation for the selected diode must be within the rated level.

The power dissipation of the diode is expressed by the following formula:

Pdi=Iout(MAX)×Vf×(1-VOUT/VCC)

Iout (MAX): maximum load current, Vf: forward voltage, VOUT: output voltage, VCC: input voltage

Capacitor C1,C2,C3,C4,C5

As large ripple currents flow across C1 and C3 capacitors, high frequency and lo w imped ance capacitor for a switching

regulator must be used. The ceramic capacitor C2 must be connected. If not, noise may cause an abnormal operation. If

the ripple voltage of input and output is large, C4 selected among ceramic , tantalum and OS capacitor with low ESR may

decrease the ripple, ho wever if the only low ESR capacitor is used, an oscillation or unstable operation may be caused.

C5 is the capacitor for phase compensation and normally not used. If you need to improve the stability of feedback

network, connect C5 between INV and OUTPUT.

Feed back resistance R1,R2

The offset of output voltage is determined by both Feed back resistance and INV pin input current.

VOUT=(R1+R2) VINV/R2 (VINV pin Threshold Votage)

If Feed back resistance is high, the setting of output voltage will be move.

Recommended : Resistance between INV pin and GND = less than 10kΩ.

⊿IL. = L1

(VCC-VOUT) VOUT

VCC fosc

1

× ×

4

5

2

3

1

INV STBY

R2 : 1kO R1 : 4kO

C5

VCC OUT

GND

C2

5.0V

L1

D1 C3

C4

C1

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

10/16

www.rohm.com 2009.04- Rev.B

●Recommended Circuit

(BD9701FP/CP-V5/T/T-V5)

＜Recommended Components (Example)＞

Inductor L1＝100μH :CDRH127/LD (sumida)

Schottky Diode D1 :RB050LA-40 (ROHM)

Capacitor C1＝100μF(50V) :Al electric capacitor UHD1H101MPT (nichicon)

C2＝OPEN

C3＝220μF(25V) :Al electric capacitor UHD1E221MPT (nichicon)

C4＝OPEN

C5＝OPEN

＜Recommended Components example 2＞

Inductor L1＝100μH :CDRH127/LD (sumida)

Schotky Diode D1 :RB050LA-40 (ROHM)

Capacitor C1＝220μF(25V) :Al electric capacitor UVR1H221MPA (nichicon)

C2＝1.0μF(50V) :ceramic cap UMK212F105ZG (TAIYO YUDEN)

C3＝470μF(16V) :Al electric capacitor UVR1E471MPA (nichicon)

C4＝150μF(20V) :OS capacitor 20SVP150M (SANYO)

C3＝OPEN

+

5

3

4

2

1VCC

STBY

GND

INV

OUT

5.0V

C5

R1 : 4kΩ

R2 : 1kΩ

C3

C4

D1

L1

C1

C2

Fig.31 Recommended Circuit Output Voltage 5V : Application cicuit example

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

11/16

www.rohm.com 2009.04- Rev.B

(BD9703FP/CP-V5/T/T-V5)

＜Recommended Components＞

Inductor L1＝47μH :CDRH127/LD (sumida)

Schotky Diode D1 :RB050LA-40 (ROHM)

Capacitor C1＝100μF(50V) :Al electric capacitor UHD1H101MPT (nichicon)

C2＝2.2μF(50V) :ceramic cap CM43X7R225K50A (KYOCERA)

C3＝470μF(25V) :Al electric capacitor UHD1E471MPT (nichicon)

C4＝OPEN

C3＝OPEN

(BD9702CP-V5/T/T-V5)

＜Recommended Components＞

Inductor L1＝47μH :CDRH127/LD (sumida)

Schotky Diode D1 :RB050LA-40 (ROHM)

Capacitor C1＝1000μF(50V) :Al electric capacitor UHD1H102MPT (nichicon)

C2＝OPEN

C3＝1000μF(25V) :Al electric capacitor UHD1E102MPT (nichicon)

C4＝OPEN

C3＝OPEN

●Test Circuit

IINV

Icc

Vcc OUT GND INV STBY

Vcc

SW4 SW5

SW2

12345

A

Vo

f

1kΩ

AA

V

2kΩVINV

ISTB

VSTB

SW6

+

Io

Fig.32 Input Output Measurement Circuit

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

12/16

www.rohm.com 2009.04- Rev.B

●I/O Equivalent Circuit

Pin 1 (VCC), Pin 3 (GND) Pin 2 (OUT) Pin 4 (INV) Pin 5 (STBY)

●Notes for use

1. Absolute Maximum Ratings

Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may

result in IC deterioration or damage. Assumptions should not be made regarding the state of the IC (short mode or open

mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the

IC in a special mode where the absolute maximum ratings may be exceeded is anticipated.

2. GND voltage

Ensure a minimum GND pin potential in all operating conditions. In addition, ensure that no pins other than the GND pin

carry a voltage lower than or equal to the GND pin, including duri ng actual transient phenomena.

3. Thermal design

Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions.

4. Inter-pin shorts and mounting errors

Use caution when orienting and positioning the IC for mounting on printed circuit boards. Improper mounting may result in

damage to the IC. Shorts between output pins or between output pins and the power supply and GND pin caused by the

presence of a foreign object may result in damage to the IC.

5. Operation in strong electromagnetic field

Operation in a strong electromagnetic field may cause malfunction.

6. Thermal shutdown circuit (TSD circuit)

This IC incorporates a built-in thermal shutdown circuit (TSD circuit). T he TSD circuit is designed only to shut the IC off to

prevent runaway thermal operation. Do not continue to use the IC after operating this circuit or use the IC in an

environment where the operation of the thermal shutdown circuit is assumed.

7. Testing on application boar ds

When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress.

Always discharge capacitors after each process or step. Ground the IC during assembly steps as an antistatic measure,

and use similar caution when transporting or storing the IC. Always turn the IC's power supply of f before connecting it to or

removing it from a jig or fixture during the inspection proc ess.

VCC

GND

OUT

VCC

INV

VCC

300Ω

STB

VC

70KΩ

60KΩ

140KΩ

Fig.33Input Output Equivalent Circuit

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

13/16

www.rohm.com 2009.04- Rev.B

Output Pin

VCC

Back current prevention diode

Bypass diode

8. IC pin input

This IC is a monolithic IC which (as belo w) has P+ substrate and betweenthe various pin. A P-N junction is formed from

this P layer of each pin. For example the relation between each potential is as follows. (When GND > PinB and GND >

PinA, the P-N junction operates as a parasitic diode.) Paras itic diodes can occur inevitably in the structure of the IC. T he

operation of parasitic diodes can result in mu tual interference among circuits as well as operation faults and physical

damage. Accordingly, you must not use methods by which parasitic diodes operate, such as applying a voltage that is

lower than the GND(P substrate)voltage to an input pin.

9. Common impedance

Power supply and ground wiring should reflect consideration of the need to lower common impedance and minimize ripple

as much as possible (by making wiring as short and thick as possible or rejecting ripple b y incorporating inductance and

capacitance).

10. Pin short and mistake fitting

Do not short-circuit between OUT pin and VCC pin, OUT pin and GND pin,

or VCC pin and GND pin. When soldering the IC on circuit board,

please be unusually cautio us about theorientation and the position of the IC.

Fig.35

P substrate

Ｎ

Parasitic diode

～

GND

N

P

N

P＋ P＋

Resistance

Parasitic diode

～

ＧＮＤ

N P

N N

P＋ P＋

Transistor (NPN)

B

N

E

Ｃ

GND

P substrate

～

GND

B C

E

Other adjacent components Parasitic diode

～

GND

Parasitic diode

(PinB)

(PinA)

(PinB)

(PinA)

Fig.34 Simplified structure of a Bipolar IC

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

14/16

www.rohm.com 2009.04- Rev.B

1 1. Application circuit

Although we can recommend the application circuits contained herein with a relatively high degree of confidence, we ask

that you verify all characteristics and specifications of the circuit as well as performance under actual conditi ons. Please

note that we cannot be held respons ible for problems that may arise due to patent infringements or noncompliance with

any and all applicable laws and regulations.

12. Operation

The IC will turn ON when the voltage at the STBY pin is greater than 2.0V and will switch OFF if under 0.3V. Therefore, do

not input voltages between 0.3V and 2.0V. Malfunctions and/or physical damage may occur.

●Power Dissipation

TO252-S

TO220

AMBIENT TEMPERATURE : Ta[°C]

0

5

10

15

0 25 50 75 100 125 150

(3) 11.0W

(2) 6.5W

(1) 2.0W

POWER DISSIPATION : Pd [W]

(1) No heat sink

(2) 2layer PCB

(Copper laminate area 15 mm×15mm)

(3) 2layer PCB

(Copper laminate area 70 mm×70mm)

(4) 4layer PCB

(Copper laminate area 70 mm×70mm)

(1) No heat sink

(2) Aluminum heat sink

50×50×2 (mm3)

(3) Aluminum heat sink

100×100×2 (mm3)

0

2

5

3

025 50 75 100 125 150

(1) 0.80W

(2) 1.85W

AMBIENT TEMPERATURE : Ta[°C]

1

4

85

(3) 3.50W

(4) 4.80W

POWER DISSIPATION : Pd [W]

Fig.36

Fig.37

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

15/16

www.rohm.com 2009.04- Rev.B

●Ordering part number

B D 9 7 0 1 F P - E 2

Part No. Part No.

9701=36V/1.5A

9702=36V/1.5A

9703=36V/3.0A

Package

FP : TO252-5

CP-V5 : TO220CP-V5

T/T-V5 : TO220FP-5(V5)

Packaging and forming specification

E2: Embossed tape and reel

None:Tray,Tube

●Package specifications

(Unit : mm)

TO252-5

123 54

0.8

0.5 1.27

1.5

2.5

FIN

6.5±0.2 2.3±0.2

0.5±0.1

1.0±0.2

9.5±0.5

0.5±0.1

5.5±0.2 1.5±0.2

C0.5

5.1+0.2

-

0.1

Direction of feed

1pin

Reel ∗ Order quantity needs to be multiple of the minimum quantity.

Embossed carrier tapeTape

Quantity

Direction

of feed

The direction is the 1pin of product is at the lower left when you hold

reel on the left hand and you pull out the tape on the right hand

2000pcs

E2

( )

(Unit : mm)

TO220FP-5

7.0

10.0

2.8

4.5

1.778 0.5±0.1

1.2

0.8

1.8±0.28.0±0.2

0.7

12.0±0.2

17.0

13.5Min.

φ3.2±0.1

−0.2

+0.4

+0.3

−0.1

+0.2

+0.3

−0.1

+0.3

−0.1

23451

2.85

∗

Order quantity needs to be multiple of the minimum quantity.

TubeContainer

Quantity

Direction of feed 500pcs

Direction of products is fixed in a container tube

BD9701FP/CP-

V

5/T/

T

-

V

5,BD9703FP/CP-

V

5/T/

T

-

V

5,BD9702CP-

V

5/T/

T

-

V

5

Technical Note

16/16

www.rohm.com 2009.04- Rev.B

(Unit : mm)

TO220FP-5(V5)

0.7

7.0

10.0

1.778

12345

1.2

0.8

1.8±0.2

8.0±0.2

12.0±0.2

17.0

31.5Max.

φ3.2±0.1

−0.2

+0.4

+ 0.3

− 0.1

+ 0.3

− 0.1 2.8

4.5

0.5±0.1

−0.1

+0.2

+0.3

−0.1

(2.85)

4.25

(2.0)

23.4

17.5

25.8

8.15

∗

Order quantity needs to be multiple of the minimum quantity.

TubeContainer

Quantity

Direction of feed 500pcs

Direction of products is fixed in a container tube

(Unit : mm)

TO220CP-V5

16.92

0.92

φ3.2±0.1 4.5±0.1

0.82±0.1

8.0±0.2

1.58

0.42±0.1

12.0±0.2

1.7781.444

4.92±0.2

10.0+0.3

-

0.1 2.8+0.2

-

0.1

13.60

15.2

-

0.2

+0.4

4.12

1.0±0.2

(1.0)

(2.85)

Direction of feed

1pin

Reel ∗ Order quantity needs to be multiple of the minimum quantity.

Embossed carrier tapeTape

Quantity

Direction

of feed

The direction is the 1pin of product is at the lower left when you hold

reel on the left hand and you pull out the tape on the right hand

500pcs

E2

()

R0039

A

www.rohm.com

Notice

ROHM Customer Support System

http://www.rohm.com/contact/

Thank you for your accessing to ROHM product informations.

More detail product informations and catalogs are available, please contact us.

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the

consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied herein is for the purpose of introducing ROHM's products (hereinafter

"Products"). If you wish to use any such Product, please be sure to refer to the specications,

which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein

illustrate the standard usage and operations of the Products. The peripheral conditions must

be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information specied in this document.

However, should you incur any damage arising from any inaccuracy or misprint of such

information, ROHM shall bear no responsibility for such damage.

The technical information specied herein is intended only to show the typical functions of and

examples of application circuits for the Products. ROHM does not grant you, explicitly or

implicitly, any license to use or exercise intellectual property or other rights held by ROHM and

other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the

use of such technical information.

The Products specied in this document are intended to be used with general-use electronic

equipment or devices (such as audio visual equipment, ofce-automation equipment, commu-

nication devices, electronic appliances and amusement devices).

The Products specied in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a

Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard

against the possibility of physical injury, re or any other damage caused in the event of the

failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM

shall bear no responsibility whatsoever for your use of any Product outside of the prescribed

scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or

system which requires an extremely high level of reliability the failure or malfunction of which

may result in a direct threat to human life or create a risk of human injury (such as a medical

instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,

fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of

any of the Products for the above special purposes. If a Product is intended to be used for any

such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology specied herein that may

be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to

obtain a license or permit under the Law.