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Número de pieza | BA33BC0WFP | |
Descripción | 1A Secondary LDO Regulators | |
Fabricantes | ROHM Semiconductor | |
Logotipo | ||
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No Preview Available ! Secondary LDO Regulator Series for Local Power Supplies
1A Secondary LDO Regulators
for Local Power Supplies
BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
No.10024EBT02
Description
The BA□□BC0 are low-saturation regulators with an output current of 1.0 A and an output voltage accuracy of 2%. A
broad output voltage range is offered, from 1.5V to 10V, and built-in overcurrent protection and thermal shutdown (TSD)
circuits prevent damage due to short-circuiting and overloading, respectively.
Features
1) Output current: 1 A (min.)
2) Output voltage accuracy: 2%
Broad output range available: 1.5 V -10 V (BA□□BC0 series)
3) Low saturation-voltage type with PNP output
4) Built-in overcurrent protection circuit
5) Built-in thermal shutdown circuit
6) Integrated shutdown switch (BA□□BC0WT, BA□□BC0WT-5, or BA□□BC0WFP Series, BA00BC0WCP-V5)
7) Operating temperature range: −40°C to +105°C
Applications
All electronic devices that use microcontrollers and logic circuits
Product Lineup
Part Number
BA□□BC0WT
1.5 1.8 2.5 3.0 3.3 5.0 6.0 7.0 8.0 9.0 10.0 Variable Package
TO220FP-5
BA□□BC0WT-V5 - - - - -
TO220FP-5 (V5)
BA□□BC0WFP
TO252-5
BA□□BC0T
- TO220FP-3
BA□□BC0FP
- TO252-3
BA00BC0WCP-V5 - - - - - - - - - - -
TO220CP-V5
Symbol
a
b
c
Part Number: BA□□BC0□ □
a bc
Description
□□
15
18
25
30
33
50
Output voltage specification
Output voltage (V)
□□
1.5 V typ.
60
1.8 V typ.
70
2.5 V typ.
80
3.0 V typ.
90
3.3 V typ.
J0
5.0 V typ.
00
Existence of switch With W : A shutdown switch is provided.
Without W : No shutdown switch is provided.
Package T : TO20FP-5, TO220FP-5(V5), TO220FP-3
FP : TO252-5, TO252-3
CP : TO220CP-V5
Output voltage (V)
6.0 V typ.
7.0 V typ.
8.0 V typ.
9.0 V typ.
10.0 V typ.
Variable
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© 2010 ROHM Co., Ltd. All rights reserved.
1/8
2010.02 - Rev.B
1 page BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
Technical Note
Input / Output Equivalent Circuit Diagrams
Vcc
Vcc
CTL 27kΩ 2kΩ
31kΩ
Fig.16
R2
R1
Fig.17
* For the BA00BC0WT, connect R1 and
R2 externally between the C and GND
pins and between the OUT and C pins.
OUT
Equation: VOUT = Vc (R1 + R2) / R1
(Vc = 1.25 V (Typ.))
The recommended R1 value is
approximately 30 k to 150 k.
Thermal Derating Curves
TO220FP-3/TO220FP-5/TO220FP-5V5)
25 (1) When using an infinite heat sink.
(1)20.0
20
j-c = 6.25 (°C/W)
(2) During IC without heat sink operation.
j-a = 62.5 (°C/W)
15
10
TO252-3/TO252-5
2.0 IC mounted on a ROHM standard board
1.6
1.30
Board size: 70 70 1.6 mm
Copper foil area: 7 7 mm
TO252-5 ja=96.2 (°C/W)
TO252-3 ja=104.2 (°C/W)
1.2
TO252-5
0.8
5
(2)2.0
0
0 25 50 75 100 125 150
AMBIENT TEMPERATURE:Ta [°C]
Fig.18
TO252-3
0.4
0
0 25 50 75 100 125
AMBIENT TEMPERATURE:Ta [°C]
Fig.19
150
The characteristics of the IC are greatly influenced by the operating temperature. If the temperature exceeds the maximum
junction temperature Tjmax, deterioration or damage may occur. Implement proper thermal designs to ensure that power
dissipation is within the permissible range in order to prevent instantaneous damage resulting from heat and maintain the
reliability of the IC for long-term operation.
The following method is used to calculate the power consumption Pc (W).
Pc = (Vcc – Vo) Io + Vcc Icca
Power dissipation Pd ≥ Pc
The load current Io is calculated:
Vcc : Input voltage
Vo : Output current
IO : Load current
Icca : Circuit current
Io ≤ Pd − Vcc Icca
Vcc − Vo
Calculation Example:
Vcc = 6.0 V and Vo = 5.0 V at Ta = 85°C
0.676 − 6.0 Icca
6.0 − 5.0
ja = 96.2°C/W → −10.4 mW/°C
25°C = 1300 mW → 85°C = 676 mW
Io ≤ 550 mA (Icca 20 mA)
Refer to the above and implement proper thermal designs so that the IC will not be used under excessive power dissipation
conditions under the entire operating temperature range.
The power consumption Pc of the IC in the event of shorting (i.e. the Vo and GND pins are shorted) can be obtained from the
following equation:
Pc = Vcc (Icca + Ishort) (Ishort: short current).
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© 2010 ROHM Co., Ltd. All rights reserved.
5/8
2010.02 - Rev.B
5 Page |
Páginas | Total 10 Páginas | |
PDF Descargar | [ Datasheet BA33BC0WFP.PDF ] |
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