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BD35231HFN-TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
BD3523HFN, BD35230HFN, BD35231HFN
Technical Note
7/20
www.rohm.com
2009.04 - Rev.B
© 2009 ROHM Co., Ltd. All rights reserved.
●Reference Data
BD35231HFN
Fig.13 Input sequence
Fig.14 Input sequence
Fig.17 Tj-IIN
Fig.15 Tj-Vo (Io=0mA)
Fig.16 Tj-ICC
Fig.18 Tj-ICCSTB
VIN→Ven→VCC
VCC
Ven
VIN
Vo
Ven→VIN→VCC
VCC
Ven
VIN
Vo
1.15
1.17
1.19
1.21
1.23
1.25
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
Vo [V]
0.4
0.5
0.6
0.7
0.8
0.9
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
Icc [mA]
1.0
1.2
1.4
1.6
1.8
2.0
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
IIN [mA]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
ISTB [
μ
A]
0
5
10
15
20
25
30
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
IINSTB [
μ
A]
Fig.19 Tj-IINSTB
10
11
12
13
14
15
16
17
18
19
20
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
INRCS [
μ
A]
Fig.20 Tj-NRSC
0
1
2
3
4
5
6
7
8
9
10
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
IEN [
μ
A]
Fig.21 Tj-IEN
50
70
90
110
130
150
-50 -25 0 25 50 75 100 125 150
Tj [
℃
]
RON [m
Ω
]
75
85
95
105
115
125
135
345678
Tj [
℃
]
RON [m
Ω
]
Fig.23 Vcc- RON
Vo=1.0V
Vo=2.5V
Vo=1.8V
Vo=1.5V
Vo=1.2V
Fig.22 Tj-RON
(Vcc=5V/Vo=1.2V)
BD3523HFN, BD35230HFN, BD35231HFN
Technical Note
8/20
www.rohm.com
2009.04 - Rev.B
© 2009 ROHM Co., Ltd. All rights reserved.
●Block Diagram
BD3523HFN
BD35230HFN/BD35231HFN
Reference
Block
V
IN
UVLOLATCH
Current
Limit
V
CC
V
CC
V
CC
V
CC
EN
UVLO1
UVLO2
VREF1
GND
CL
UVLO1
UVLO2
TSD
SCP
EN
UVLO1
CL
V
CC
VREF2
V
IN
V
O
FB
V
IN
V
O
NRCS
1
EN
2
3
8
5
4
NRCS
TSD
NRCS0.3.
VREF1
×
0.4
FB
SCP/TSD
LATCH
LATCH
EN
UVLO1
EN/UVLO
NRCS
C1
C2
7
C
NRCS
C3
C
FB
R2
R1
6
Reference
Block
VIN
UVLOLATCH
Current
Limit
EN
V
CC
V
CC
V
CC
VCC
EN
UVLO1
UVLO2
VREF1
GND
CL
UVLO1
UVLO2
TSD
SCP
EN
UVLO1
CL
V
CC
VREF2
V
IN
V
O
FB
V
IN
V
O
V
OS
NRCS
1
2
3
8
5
4
NRCS
TSD
NRCS0.3.
VREF1
×
0.4
FB
SCP/TSD
LATCH
LATCH
EN
UVLO1
EN/UVLO
NRCS
C1
C2
7
C
NRCS
C3 C
FB
6
R2
R1
R2
R1
BD3523HFN, BD35230HFN, BD35231HFN
Technical Note
9/20
www.rohm.com
2009.04 - Rev.B
© 2009 ROHM Co., Ltd. All rights reserved.
●Pin Layout
●Pin Function Table
PIN No. PIN name PIN Function PIN No. PIN name PIN Function
1 VCC Power Supply Pin 1 VCC Power Supply Pin
2 EN Enable Input Pin 2 EN Enable Input Pin
3 NRCS
In-rush Current Protection (NRCS)
Capacitor Connection Pin
3 NRCS
In-rush Current Protection (NRCS)
Capacitor Connection Pin
4 VIN Input Voltage Pin 4 VIN Input Voltage Pin
5 VO Output Voltage Pin 5 VO Output Voltage Pin
6 VO Output Voltage Pin 6 VOS Output Voltage Control Pin
7 FB Reference Voltage Feedback Pin 7 FB Reference Voltage Feedback Pin
8 GND Ground Pin 8 GND Ground Pin
- FIN Connected to heatsink and GND - FIN Connected to heatsink and GND
BD3523HFN BD35230HFN/BD35231HFN
GND
FB
6
Vcc
EN
NRCS
VIN
4
3
2
1
FIN
Vo
5
6
7
8
V
o
GND
FB
6
FIN
Vos
5
6
7
8
V
o
Vcc
EN
NRCS
V
IN
4
3
2
1
BD3523HFN BD35230HFN/BD35231HFN
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

BD35231HFN-TR

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Buy BD35231HFN-TR
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Description:
LDO Voltage Regulators LDO REGULATOR POS 1.2V 2A 8PIN
Lifecycle:
New from this manufacturer.
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