Rohm BD9703CP-V5 Simple step-down switching regulators with built-in power mosfet Datasheet

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
No.09027EBT01
●Description
The BD9701/BD9703/BD9702 are single-channel step-down switching regulator capable of PWM operation.
The Pch MOS FET is built in for high efficiency in small load area.Lower electricity consumption of operating current 4mA
(Typ) and stand-by current 0uA(Typ) is realized 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(BD9703), 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 devices, and more.
●Line Up
BD9701FP/CP-V5/T/T-V5 BD9703FP/CP-V5/T/T-V5
BD9702CP-V5/T/T-V5
1.5A
3.0A
Output Current
Input Voltage
Switching Frequency
100kHz (fixed)
8 or Vo+3 ~ 36V
300kHz (fixed)
External Synchronization
×
Stand-by Function
○
-40 ~ +85℃
Operating Temperature
Package
110kHz (fixed)
TO252-5/TO220CP-V5/TO220FP-5/TO220FP-5 (V5) TO220CP-V5/TO220FP-5/TO220FP-5 (V5)
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1/16
2009.04- Rev.B
Technical Note
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
●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
BD9701/BD9703
1.5
Maximum Switching Current
Iout
A
BD9702
3
0.8 (*1)
TO252
Power Dissipation
Pd
W
2(*2)
TO220
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
Limit
Symbol
Input Voltage
Output Voltage
Unit
MIN
TYP
MAX
VCC
8.0 or Vo+3(*3)
-
35.0
V
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)
Limit
Parameter
Symbol
Unit
Conditions
MIN
TYP
MAX
Ron
-
1.0
1.5
Ω
design guarantee
η
-
86
-
%
Io=0.5A design guarantee
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
IINV
-
1
-
μA
VINV=1.0V
ON
VSTBYON
2.0
-
36
V
OFF
VSTBYOFF
-0.3
-
0.3
V
Istby
5
25
50
μA
Circuit Current
Icc
-
4
12
mA
Stand-by Current
Ist
-
0
5
μA
Output ON Resistance
Efficiency
Switching Frequency
INV Pin Input Current
STBY Pin
Threshold Voltage
STBY Pin Input Current
STBY=3V
STBY=0V
This product is not designed to be resistant to radiation.
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2/16
2009.04- Rev.B
Technical Note
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
●Electrical Characteristics
○BD9703FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25℃,VCC=12V,Vo=5V,STBY=3V)
Limit
Parameter
Symbol
Unit
Conditions
MIN
TYP
MAX
Ron
-
1.0
1.5
Ω
design guarantee
η
-
86
-
%
Io=0.5A design guarantee
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
IINV
-
1
-
μA
VINV=1.0V
ON
VSTBYON
2.0
-
36
V
OFF
VSTBYOFF
-0.3
-
0.3
V
Istby
5
25
50
μA
Circuit Current
Icc
-
5
12
mA
Stand-by Current
Ist
-
0
5
μA
Output ON Resistance
Efficiency
Switching Frequency
INV Pin Input Current
STBY Pin
Threshold Voltage
STBY Pin Input Current
STBY=3V
STBY=0V
●Electrical Characteristics
○BD9702FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25℃,VCC=12V,Vo=5V,STBY=3V)
Limit
Parameter
Symbol
Unit
Conditions
MIN
TYP
MAX
Ron
-
0.5
1.5
Ω
design guarantee
η
-
86
-
%
Io=1A design guarantee
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
IINV
-
1
-
μA
VINV=1.0V
ON
VSTBYON
2.0
-
36
V
OFF
VSTBYOFF
-0.3
-
0.3
V
Istby
5
25
50
μA
Circuit Current
Icc
-
4
12
mA
Stand-by Current
Ist
-
0
5
μA
Output ON Resistance
Efficiency
Switching Frequency
INV Pin Input Current
STBY Pin
Threshold Voltage
STBY Pin Input Current
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3/16
STBY=3V
STBY=0V
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Characteristic Data
○BD9701FP/CP-V5/T/T-V5
5
80
70
60
50
110
OSC FREQUENCY : FOSC [kHz]
90
OUTPUT VOLTAGE : VO [V]
6
EFFICIENCY η: [%]
100
4
3
2
1
0
40
10
100
0
1000
1
2
3
105
100
95
90
-10
4
OUTPUT CURRENT IOUT : [A]
OUTPUT CURRENT : IOUT[A]
Fig.2
OCP VCC=20V
Fig.1
EFFICIENCY-LOAD CURRENT
30
50
70
90
Fig.3
fosc-Ta
5.100
5.1
10
AMBIE NT T E MPE RAT URE : T a [℃ ]
5
VCC=30V
5.05
5
4.95
VCC=20V
VCC=10V
CIRCUIT CURRENT ; [mA]
OUTPUT VOLTAGE : VO [V]
5.050
5.000
4.950
4.9
3
2.5
2
1.5
1
0
4.900
0
200
400
600
800
1000
0
10
20
30
10
40
INPUT VOLTAGE : VCC [V]
OUTPUT CURRENT : IOUT[A]
OSC FREQUENCY : FOSC [kHz]
3
2.5
2
1.5
1
0.5
0
0.5
1
1.5
105
100
95
2
SWITCHING CURRENT : ISW[A]
Fig.7
VOUT~OUT VOLTAGE-DRAIN CURRENT
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25
30
35
1.020
90
0
20
Fig.6
CIRCUIT CURRENT-INPUT VOLTAGE
NO LOAD
110
3.5
15
INPUT VOLTAGE : VCC [V]
Fig.5
OUTPUT VOLTAGE-INPUT VOLTAGE
(Vo=5V,Ro=5ohm)
Fig.4
OUTPUT VOLTAGE-LOAD CURRENT
OUTPUT VOLTAGE : VDS[V]
4
3.5
0.5
0
10
20
30
INPUT VOLTAGE : VCC [V]
Fig.8
fosc-INPUT VOLTAGE
4/16
40
INV THRESHOLD VOLTAGE : VINV[V]
OUTPUT VOLTAGE : VO [V]
4.5
1.010
1.000
0.990
0.980
-10
10
30
50
70
AMBIENT TEMPERATURE : Ta [℃]
Fig.9
INV THRESHOLD VOLTAGE-Ta
2009.04- Rev.B
90
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Characteristic Data
○BD9702FP/CP-V5/T/T-V5
6
100
EFFICIENCY η: [%]
80
70
60
50
[kHz] OSC FREQUENCY : FOSC
OUTPUT VOLTAGE : VO [V]
120
90
5
4
3
2
1
0
40
10
100
1000
OUTPUT CURRENT : IOUT[A]
0
10000
1
5.10
4
5
VCC=20V
5.00
4.95
VCC=10V
4.90
500
1000
1500
2000
2500
5.00
4.95
10
20
30
40
Fig.13
OUTPUT VOLTAGE-LOAD CURRENT
Fig.14
OUTPUT VOLTAGE-INPUT VOLTAGE
(Vo=5V,Ro=5ohm)
INV THRESHOLD VOLTAGE : VINV[V]
OSC FREQUENCY : FOSC [kHz]
110
105
0.5
1
1.5
2
2.5
3
SWITCHING CURRENT : ISW[A]
Fig.16
VOUT~OUT VOLTAGE-DRAIN CURRENT
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2
1
15
20
25
30
35
Fig.15
CIRCUIT CURRENTINPUT VOLTAGE NO LOAD
1.01
1.00
0.99
0.98
100
0
3
1.02
115
0.0
90
INPUT VOLTAGE : VCC [V]
120
0.5
70
4
10
OUTPUT CURRENT : IOUT[A]
1.0
50
0
0
INPUT VOLTAGE : VCC [V]
1.5
30
5
5.05
3000
2.0
10
Fig.12
fosc-Ta
4.90
0
- 10
AMBIENT TEMPERATURE : Ta [℃]
CIRCUIT CURRENT ; [mA]
VCC=30V
5.05
105
100
6
5.10
OUTPUT VOLTAGE : VO [V]
OUTPUT VOLTAGE : VO [V]
3
110
Fig.11
OCP VCC=20V
Fig.10
EFFICIENCY-LOAD CURRENT
OUTPUT VOLTAGE : VDS[V]
2
OUTPUT CURRENT : IOUT[A]
115
0
10
20
30
40
-10
10
30
50
70
INPUT VOLTAGE : VCC [V]
AMBIENT TEMPERATURE : Ta [℃]
Fig.17
fosc-INPUT VOLTAGE
Fig.18
INV THRESHOLD VOLTAGE-Ta
5/16
2009.04- Rev.B
90
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Characteristic Data
○BD9703FP/CP-V5/T/T-V5
100
6
80
70
60
50
OSC FREQUENCY : FOSC [kHz]
OUTPUT VOLTAGE : VO [V]
EFFICIENCY η: [%]
90
330
5
4
3
2
1
0
40
10
100
0
1000
OUTPUT CURRENT : IOUT[A]
3
285
270
4
-10
Fig.21
fosc-Ta
5
OUTPUT VOLTAGE : VO [V]
VCC=30V
5
VCC=20V
4.95
VCC=10V
CIRCUIT CURRENT ; [mA]
5.10
5.05
5.05
5.00
4.95
200
400
600
800
0
1000
1.5
10
20
30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
SWITCHING CURRENT : ISW[A]
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20
25
30
35
Fig.24
CIRCUIT CURRENT-INPUT
VOLTAGE NO LOAD
1.02
315
300
285
270
0
10
20
30
INPUT VOLTAGE : VCC [V]
Fig.25
VOUT~OUT
VOLTAGE-DRAIN CURRENT
15
INPUT VOLTAGE : VCC [V]
INV THRESHOLD VOLTAGE : VINV[V]
OSC FREQUENCY : FOSC [kHz]
0
1
10
40
330
0
2
Fig.23
OUTPUT VOLTAGE-INPUT
VOLTAGE (Vo=5V,Ro=5ohm)
Fig.22
OUTPUT VOLTAGE-LOAD CURRENT
0.5
3
INPUT VOLTAGE : VCC [V]
OUTPUT CURRENT : IOUT[A]
1
4
0
4.90
4.9
0
10
30
50
70
90
AMBIENT TEMPERATURE : Ta [℃]
Fig.20
OCP VCC=20V
5.1
OUTPUT VOLTAGE : VO [V]
2
300
OUTPUT CURRENT : IOUT[A]
Fig.19
EFFICIENCY-LOAD CURRENT
OUTPUT VOLTAGE : VDS[V]
1
315
Fig.26
fOSC-INPUT VOLTAGE
6/16
40
1.01
1.00
0.99
0.98
-10
10
30
50
70
90
AMBIENT TEMPERATURE : Ta [℃]
Fig.27
INV THRESHOLD VOLTAGE-Ta
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
●Block Diagram
BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T-V5, BD9702CP-V5/T/T-V5
Technical Note
VCC
1
TO252-5 Package Dimensions (mm)
VREF
PWM COMP
DRIVER
OSC
STBY 5
STBY
CTL
LOGIC
OUT
2
OCP
TSD
INV
4
Error AMP
TO220CP-V5 Package Dimensions (mm)
3
GND
Fig.28 Block Diagram
●Pin Description
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
(*2)FIN is assigned in the case of TO252-5.
TO220FP-5 Package Dimensions (mm)
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TO220FP-5(V5) Package Dimensions (mm)
7/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Block Function Explanations
・VREF
Generates the regulated voltage from VCC input, compensated for temperature.
・OSC
Generates the triangular wave oscillation frequency using an internal resistors and capacitor. Used for PWM comparator 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 internal 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
OSC
(Internal Oscillation Wave) Error AMP OUTPUT
VCC PIN
VOLTAGE WAVE
OUTPIN
VOLTAGE WAVE
OUTPUT
VOLTAGE WAVE
Fig.29
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Timing Chart
8/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Notes for PCB layout
C5
R1 : 4kO
R2 : 1kO
C1
4
INV
STBY 5
1 VCC
OUT 2
L1
GND
C2
3
5.0V
D1
C4
C3
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 than IOUT(MAX)+⊿IL. Iout (MAX): maximum load current
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 current rating of coil which doesn’t over peak current.
VOUT
(VCC-VOUT)
⊿IL. =
×
×
1
fosc
L1
VCC
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 than the combined maximum load current and coil ripple current (⊿IL).
・The reverse voltage rating is higher than the 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 low impedance 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, however 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.
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9/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Recommended Circuit
C2
+
C1
1
VCC
OUT
L1
2
5.0V
D1
C4
+
C3
STBY
5
R1 : 4kΩ
C5
INV
4
R2 : 1kΩ
3
GND
Fig.31 Recommended Circuit Output Voltage 5V : Application cicuit example
(BD9701FP/CP-V5/T/T-V5)
<Recommended Components (Example)>
Inductor
L1=100μH
Schottky Diode
D1
Capacitor
C1=100μF(50V)
C2=OPEN
C3=220μF(25V)
C4=OPEN
C5=OPEN
<Recommended Components example 2>
Inductor
L1=100μH
Schotky Diode
D1
Capacitor
C1=220μF(25V)
C2=1.0μF(50V)
C3=470μF(16V)
C4=150μF(20V)
C3=OPEN
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:CDRH127/LD (sumida)
:RB050LA-40 (ROHM)
:Al electric capacitor UHD1H101MPT (nichicon)
:Al electric capacitor UHD1E221MPT (nichicon)
:CDRH127/LD (sumida)
:RB050LA-40 (ROHM)
:Al electric capacitor UVR1H221MPA (nichicon)
:ceramic cap UMK212F105ZG (TAIYO YUDEN)
:Al electric capacitor UVR1E471MPA (nichicon)
:OS capacitor 20SVP150M (SANYO)
10/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
(BD9703FP/CP-V5/T/T-V5)
<Recommended Components>
Inductor
L1=47μH
Schotky Diode
D1
Capacitor
C1=100μF(50V)
C2=2.2μF(50V)
C3=470μF(25V)
C4=OPEN
C3=OPEN
:CDRH127/LD (sumida)
:RB050LA-40 (ROHM)
:Al electric capacitor UHD1H101MPT (nichicon)
:ceramic cap CM43X7R225K50A (KYOCERA)
:Al electric capacitor UHD1E471MPT (nichicon)
(BD9702CP-V5/T/T-V5)
<Recommended Components>
Inductor
L1=47μH
Schotky Diode
D1
Capacitor
C1=1000μF(50V)
C2=OPEN
C3=1000μF(25V)
C4=OPEN
C3=OPEN
:CDRH127/LD (sumida)
:RB050LA-40 (ROHM)
:Al electric capacitor UHD1H102MPT (nichicon)
:Al electric capacitor UHD1E102MPT (nichicon)
●Test Circuit
Vcc
1
OUT
2
GND
INV
4
3
SW2
+
STBY
5
SW4
Icc A
A I INV
1kΩ
Vcc
2kΩ
A
V INV
+
f
SW5
ISTB
VSTB
SW6
V
Vo
Io
Fig.32 Input Output Measurement Circuit
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© 2009 ROHM Co., Ltd. All rights reserved.
11/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●I/O Equivalent Circuit
Pin 1 (VCC), Pin 3 (GND)
Pin 2 (OUT)
Pin 4 (INV)
Pin 5 (STBY)
VC
VCC
VCC
STB
VCC
OUT
INV
300Ω
140KΩ
60KΩ
GND
70KΩ
Fig.33Input Output Equivalent Circuit
●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 during 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). The 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 boards
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 off before connecting it to or
removing it from a jig or fixture during the inspection process.
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© 2009 ROHM Co., Ltd. All rights reserved.
12/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
8. IC pin input
This IC is a monolithic IC which (as below) 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.) Parasitic diodes can occur inevitably in the structure of the IC. The
operation of parasitic diodes can result in mutual 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.
(PinB)
C
~
~
(PinA)
Transistor (NPN)
B
~
~
Resistance
E
GND
N
P+
P
N
P+
P+
P
N
N
N
N
N
P substrate
P substrate
Parasitic diode
P+
GND
GND
Parasitic diode
(PinB)
(PinA)
~
~
~
~
C
Parasitic diode
B
E
GND
GND
Other adjacent components
Parasitic diode
Fig.34 Simplified structure of a Bipolar IC
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 by 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 cautious about theorientation and the position of the IC.
Bypass diode
Back current prevention diode
VCC
Output Pin
Fig.35
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© 2009 ROHM Co., Ltd. All rights reserved.
13/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
11. 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 conditions. Please
note that we cannot be held responsible 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
(4) 4.80W
POWER DISSIPATION : Pd [W]
5
4
(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)
(3) 3.50W
3
(2) 1.85W
2
(1) 0.80W
1
0
0
25
50
75 85 100
125
AMBIENT TEMPERATURE : Ta[°C]
150
Fig.36
TO220
POWER DISSIPATION : Pd [W]
15
(1) No heat sink
(2) Aluminum heat sink
3
50×50×2 (mm )
(3) Aluminum heat sink
100×100×2 (mm3)
(3) 11.0W
10
(2) 6.5W
5
(1) 2.0W
0
0
25
50
75
100
125
AMBIENT TEMPERATURE : Ta[°C]
150
Fig.37
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© 2009 ROHM Co., Ltd. All rights reserved.
14/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
●Ordering part number
B
D
9
Part No.
7
0
1
F
Part No.
9701=36V/1.5A
9702=36V/1.5A
9703=36V/3.0A
P
-
Package
FP : TO252-5
CP-V5 : TO220CP-V5
T/T-V5 : TO220FP-5(V5)
E
2
Packaging and forming specification
E2: Embossed tape and reel
None:Tray,Tube
●Package specifications
TO252-5
<Tape and Reel information>
2.3±0.2
6.5±0.2
C0.5
1.5±0.2
+0.2
5.1 -0.1
0.5±0.1
Tape
Embossed carrier tape
Quantity
2000pcs
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
)
1.5
4 5
0.8
1 2 3
2.5
9.5±0.5
5.5±0.2
FIN
E2
0.5±0.1
0.5
1.27
1.0±0.2
1pin
Reel
(Unit : mm)
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
+0.3
4.5 −0.1
+0.2
2.8 −0.1
φ3.2±0.1
Container
Tube
Quantity
500pcs
Direction of feed
Direction of products is fixed in a container tube
8.0±0.2
0.7
+0.4
17.0 −0.2
+0.3
10.0−0.1
+0.3
7.0 −0.1
13.5Min.
12.0±0.2
1.8±0.2
TO220FP-5
1.2
0.8
1.778
0.5±0.1
2.85
1 2 3 4 5
∗ Order quantity needs to be multiple of the minimum quantity.
(Unit : mm)
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15/16
2009.04- Rev.B
BD9701FP/CP-V5/T/T-V5,BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5
Technical Note
23.4
(2.0)
φ3.2±0.1
<Tape and Reel information>
+0.2
2.8 −0.1
17.5
+0.3
4.5 −0.1
0.3
7.0 +
− 0.1
Container
Tube
Quantity
500pcs
Direction of feed
Direction of products is fixed in a container tube
25.8
+ 0.3
10.0 − 0.1
8.0±0.2
0.7
+0.4
17.0 −0.2
12.0±0.2
31.5Max.
1.8±0.2
TO220FP-5(V5)
1.2
0.8
0.5±0.1
1.778
(2.85)
4.25
8.15
1 2 3 4 5
∗ Order quantity needs to be multiple of the minimum quantity.
(Unit : mm)
TO220CP-V5
1.444
<Tape and Reel information>
4.5±0.1
(1.0)
0.82±0.1
0.92
1.778
Tape
Embossed carrier tape
Quantity
500pcs
E2
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
)
16.92
13.60
+0.2
2.8 -0.1
8.0 ± 0.2
1.0 ± 0.2
4.92 ± 0.2
12.0 ± 0.2
+0.4
15.2 -0.2
+0.3 φ3.2±0.1
10.0 -0.1
0.42±0.1
1.58
(2.85)
4.12
(Unit : mm)
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© 2009 ROHM Co., Ltd. All rights reserved.
Reel
16/16
1pin
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2009.04- Rev.B
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified 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 specifications,
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 specified 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 specified 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 specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified 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, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire 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 specified 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.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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© 2009 ROHM Co., Ltd. All rights reserved.
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