TECHNICAL NOTE
High-performance Regulator IC Series for PCs
300mA Linear Regulators
for Desktop PC
BD35630HFV
●Description
BD35630HFV is a LDO regulator with output current 300mA. The output accuracy is±1% of output voltage. With
external resistance, it is available to set the output voltage at random (from V
FB
to 15.0V) and also is used for the wide
applications of digital appliances. Over current protection (for protecting the IC destruction by output short circuit), circuit
current ON/OFF switch (for setting the circuit current 0μA at shutdown mode), and thermal shutdown circuit (for
protecting ICs from heat destruction by over load condition) are all built in.
●Features
1) Output current 300mA
2) High accuracy reference voltage circuit
3) Built-in Over Current Protection circuit (OCP)
4) Built-in Thermal Shut Down circuit (TSD)
5) With shut down switch
6) Output voltage variable type (V
FB
to 15.0V)
6) Package : HVSOF6
Oct. 2008
●Absolute
maximum ratings (Ta=25℃)
Parameter
Power Supply Voltage
EN Voltage
Power Dissipation
HVSOF6
Operating Temperature Range
Storage Temperature Range
Junction Temperature
Symbol
Vcc
VEN
Pd
Topr
Tstg
Tjmax
Limits
24.0 *
1
24.0
1700.0
*2
-10½+100
-55½+150
+150
Unit
V
V
mW
℃
℃
℃
*1 Not to exceed Pd
*2 Reduced by 13.6mW for each increase in Ta of 1℃ over 25℃.
(when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB. (copper foil area : 2500mm
2
))
●Operating
Conditions (Ta=25℃)
Parameter
Input Power Supply Voltage
Output voltage
EN Voltage
Output Current
Symbol
Vcc
Vo
VEN
Io
Min.
4.5
V
FB
-
-
Max.
20.0
15.0
20.0
300
Unit
V
V
V
mA
★This
product should not be used in a radioactive environment.
●ELECTRICAL
CHARACTERISTICS
BD35630HFV (Unless otherwise noted, Ta=25℃, EN=3V, Vcc=12V, R
1
=750kΩ, R
2
=82kΩ)
Parameter
Symbol
Min.
Typ.
Max.
Output Voltage 1
Vo1
7.920
8.000
8.080
Output Voltage 2
Circuit Current at shutdown mode
Bias Current
Output Current Ability
Line Regulation
Output Reference Voltage
EN Low Voltage
EN High Voltage
EN Bias Current
Vo2
Isd
Icc
Io
Reg.I
V
FB
V
EN
(Low)
V
EN
(High)
IEN
7.880
-
-
300
-
0.780
0
2.4
0.5
8.000
0
250
-
25
0.788
-
-
1.0
8.120
5
300
-
50
0.796
0.8
20.0
5.0
Unit
V
V
μA
μA
mA
mV
V
V
V
μA
Conditions
Io=0mA
Tj=0 to 100℃
Io=0mA→300mA
EN=0V, @OFF mode
Vcc=(Vo+1.8V)→15.0V,
Io=300mA
Io=0mA
2/10
●Reference
Data
BD35630HFV (Unless otherwise specified, Ta=25℃, EN=3V, Vcc=12V, R
1
=750kΩ, R
2
=82kΩ)
Vo
200mV/div
Vo
200mV/div
EN
5V/div
Io
200mA/div
Io
200mA/div
Vo
5V/div
(20m sec/div)
(10μsec/div)
(0.2msec/div)
Fig.1 Transient Response
(300m→0mA), Co=1μF
EN
5V/div
Fig.2 Transient Response
(0→300mA), Co=1μF
Fig.3 Waveform at output start
Co=1μF
EN
5V/div
VCC
10V/div
EN
5V/div
VCC
10V/div
VCC
10V/div
Vo
5V/div
Vo
5V/div
Vo
5V/div
(1sec/div)
(1msec/div)
(1msec/div)
Fig.4 Waveform at output OFF
Co=1μF
8.2
Fig.5 Input sequence 1
Co=1μF
230
Fig.6 Input sequence 2
Co=1μF
1.0
8.1
220
0.8
VOUT [V]
Icc [μA]
8.0
210
0.6
Icc [A]
-10
10
30
50
Ta [℃]
70
90
100
7.9
200
0.4
7.8
190
0.2
7.7
-10
15
40
Ta [℃]
65
90
100
180
0.0
-10
10
30
50
Ta [℃]
70
90
100
Fig.7 Ta-Vo (Io=0mA)
Fig.8 Ta-Icc
Fig.9 Ta-Icc
(Vcc=12V, V
EN
=0V)
2.0
8.2
10
1.6
8.1
8
8.0
0.8
ISTB [μA]
0
50
100
150
Io [mA]
200
250
300
Ien [μA]
1.2
Vo [V]
6
4
0.4
7.9
2
0.0
-10
10
30
50
Ta [℃]
70
90
100
7.8
0
0
5
10
15
20
25
Vcc [V]
Fig.14 Ta-IEN
(Vcc=12V, V
EN
=3V)
Fig.15 Io-Vo
Fig.16 Vcc-ISTB
(Vcc=12V, V
EN
=3V)
3/10
●Reference
Data (BD35630HFV)
10
8
6
Vo [V]
4
2
0
0
3
6
Vcc [V]
9
12
15
Fig.18 Vcc-Vo
●Heat
Dissipation Characteristics
[W]
3.0
2.5
Power Dissipation [Pd]
PCB size:70mm×70mm×1.6mm
Board①:1 layer (copper foil area:100mm
2
).
Board②:1 layer (copper foil area:900 mm
2
)
Board③:1 layer (copper foil area: 2500mm
2
)
③1.70W
②1.40W
①:θja=147.1℃/W
②:θja=89.3℃/W
③:θja=73.5℃/W
◎HVSOF6
2.0
1.5
1.0
0.5
0
①0.85W
0
25
50
75
100
125
150
Ambient Temperature [Ta]
[℃]
4/10
●Block
Diagram
(HVSOF6)
GND
3
6
Vcc
(Vo+1.8)½20V
Ceramic
Capacitor
≧
1μF
OCP
SOFT
Vo
1
VFB½15.0V
R
1
2
Ceramic
≧
1μF
Capacitor
EN
4
TSD
FB
R
2
●Pin
Function Table (HVSOF6)
Pin No.
1
2
3
4
5
6
Pin name
Vo
FB
GND
EN
N.C
Vcc
Pin Function
Output Voltage Pin
Output Reference Voltage Pin (Feedback Pin)
GND Pin
Enable Pin
Open
Input Voltage Pin
●Pin
Layout (HVSOF6)
VO
1
6
VCC
FB
2
5
N.C
GND
3
4
EN
5/10