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BA33BC0WFP-E2 Arkusz danych(PDF) 8 Page - Rohm

Numer części BA33BC0WFP-E2
Szczegółowy opis  1A Variable/Fixed Output LDO Regulators
Download  19 Pages
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Producent  ROHM [Rohm]
Strona internetowa  http://www.rohm.com
Logo ROHM - Rohm

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BAxxBC0 Series
BAxxBC0W Series
BA00BC0WCP-V5
Datasheet
TSZ02201-0R6R0A600120-1-2
TSZ22111・15・001
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
26.Jun.2012 Rev.001
Application Information
●I/O equivalence circuit
●Power Dissipation
• TO220FP-3/TO220FP-5/TO220FP-5 V5)
• TO252-3/TO252-5
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:
Calculation Example:
Vcc = 6.0 V and Vo = 5.0 V at Ta = 85°C
31k
Ω
2k
Ω
27k
Ω
CTL
Vcc
R2
R1
Vcc
OUT
Fig.16
Fig.17
* For the BA00BC0WT, connect R1 and
R2 externally between the C and GND
pins and between the OUT and C pins.
Fig.18
Fig.19
0
15
25
20
10
5
25
50
75
125
150
100
0
AMBIENT TEMPERATURE:Ta [°C]
(1)20.0
(2)2.0
(2) During IC without heat sink operation.
θj-a = 62.5 (°C/W)
(1) When using an infinite heat sink.
θj-c = 6.25 (°C/W)
0
1.2
2.0
1.6
0.8
0.4
25
50
75
125
150
100
0
AMBIENT TEMPERATURE:Ta [°C]
1.30
IC mounted on a ROHM standard board
Board size: 70
× 70 × 1.6 mm
Copper foil area: 7
× 7 mm
TO252-5
θja=96.2 (°C/W)
TO252-3
θja=104.2 (°C/W)
TO252-5
TO252-3
θja = 96.2°C/W → −10.4mW/°C
25°C = 1300mW → 85°C = 676mW
Vcc : Input voltage
Vo
: Output current
IO
: Load current
Icca : Circuit current
Io ≦
Pd
− Vcc
× Icca
Vcc
− Vo
Io≦
0.676
− 6.0
× Icca
6.0
− 5.0
Io ≦ 550mA (Icca
≈ 20mA)
Equation: VO = Vc × (R1 + R2) / R1
(Vc = 1.25 V (Typ.))
The recommended R1 value is
approximately 30 k
Ω to 150 kΩ.


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