BH12PB1WHFV Ver la hoja de datos (PDF) - ROHM Semiconductor
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Fabricante
BH12PB1WHFV
ROHM Semiconductor
BH12PB1WHFV Datasheet PDF : 11 Pages
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BH□□PB1WHFV Series
Technical Note
●Input Output capacitors
It is recommended to insert bypass capacitors between input and GND pins, positioning them as close to the pins as
possible. These capacitors will be used when the power supply impedance increases or when long wiring paths are used, so
they should be checked once the IC has been mounted. Ceramic capacitors generally have temperature and DC bias
characteristics. When selecting ceramic capacitors, use X5R or X7R, or better models that offer good temperature and DC
bias characteristics and high tolerant voltages.
Typical ceramic capacitor characteristics
120
100
100
95
50 V rated voltage
80
90
60
85
10V
16 V rated voltage
40 rated voltage
80
20
75
50 V rated voltage
16 V rated voltage
10 V
rated voltage
120
100
80
X7R
X5R
60
Y5V
40
20
0
0
1
2
3
4
DC bias Vdc (V)
Fig.28 Capacitance vs Bias
(Y5V)
70
0
1
2
3
4
DC bias Vdc (V)
Fig.29 Capacitance vs Bias
(X5R, X7R)
0
-25
0
25
50
75
Temp[℃]
Fig.30 Capacitance vs Temperature
(X5R, X7R, Y5V)
●Output capacitors
Mounting input capacitor between input pin and GND(as close to pin as possible), and also output capacitor between output
pin and GND(as close to pin as possible) is recommended. The input capacitor reduces the output impedance of the voltage
supply source connected to the VCC. The higher value the output capacitor goes the more stable the whole operation
becomes. This leads to high load transient response. Please confirm the whole operation on actual application board.
Generally, ceramic capacitor has wide range of tolerance, temperature coefficient, and DC bias characteristic. And also its value goes
lower as time progresses. Please choose ceramic capacitors after obtaining more detailed data by asking capacitor makers.
BH□□PB1WHFV
100
10
1
Stable region
0.1
COUT = 0.47 µF
Ta = +25°C
0.01
0
50
100
150
Output Current Ｉｏ （mA)
Fig.31 Stable Operation Region (Example)
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© 2011 ROHM Co., Ltd. All rights reserved.
7/10
2011.01 - Rev.B
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