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PDF BA30E00WHFP Data sheet ( Hoja de datos )
| Número de pieza | BA30E00WHFP | |
| Descripción | Dual-Output (Fixed/Variable) LDO Regulators | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Dual-Output
(Fixed/Variable) LDO Regulators
BA3259HFP BA30E00WHFP
●General Description
The BA3259HFP and BA30E00WHFP are 2-output, low-saturation regulators. These units have both a 3.3 V fixed output as
well as a variable output with a voltage accuracy of ±2%, and incorporate an overcurrent protection circuit to prevent IC
destruction due to output shorting along with a TSD (Thermal Shut Down) circuit to protect the IC from thermal destruction
caused by overloading.
●Features
Output voltage accuracy: ± 2%.
Reference voltage accuracy: ± 2%
Ceramic capacitor can be used to prevent output
oscillation (BA3259HFP)
Low dissipation with two voltage input supported
(BA30E00WHFP)
Built-in thermal shutdown circuit
Built-in overcurrent protection circuit
●Key Specifications
■ Input Power Supply Voltage:
BA3259HFP
BA30E00WHFP
■ Output Voltage type: VO1
VO2
■ Output Current:
BA3259HFP
BA30E00WHFP
■ Operating temperature range:
BA3259HFP
BA30E00WHFP
14.0V(Max.)
16.0V(Max.)
Fixed
Variable
1A (MAX)
0.6A (MAX)
0 to 85℃
−25 to 105℃
●Packages
HRP5
HRP7
W (Typ.) x D (Typ.) x H (Max.)
9.395mm x 10.54mm x 2.005mm
9.395mm x 10.54mm x 2.005mm
HRP5
HRP7
●Applications
Available to all commercial devices, such as FPD, TV,
and PC sets besides DSP power supplies for DVD and
CD sets.
●Ordering Information
BA3 x x xHF P-
TR
Part Number
Package
HFP:HRP5
HRP7
Packaging and forming specification
TR: Embossed tape and reel
●Lineup
Maximum Output Current
(Max.)
1.0A
0.6A
Output Voltage 1
(Typ.)
3.3V
3.3V
Output Voltage 2
(Typ.)
Package
Orderable Part Number
0.8 to 3.3V HRP5
Reel of 2000 BA3259HFP-TR
0.8 to 3.3V HRP7
Reel of 2000 BA30E00WHFP-TR
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･14･001
○This product is not designed protection against radioactive rays.
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TSZ02201-0R6R0A600100-1-2
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1 page  
BA3259HFP BA30E00WHFP
●Typical Performance Curves
BA3259HFP (Unless otherwise specified, Ta=25℃, Vcc=5 V)
Datasheet
Fig.3
Circuit Current (with no load)
Fig.4
Circuit Current vs Load Current Io
Fig.5
ADJ Pin Outflow Current
Fig.6
Input Stability
(3.3 V output with no load)
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
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TSZ02201-0R6R0A600100-1-2
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5 Page 
BA3259HFP BA30E00WHFP
Application Information
●Setting the Output Voltage Vo2
The following output voltage setting method applies to the variable output pin.
Vo2=VADJ × ( 1 +
R2
R1
) - R2 × IADJ
VADJ: Output feedback reference voltage
(0.8 V typ.)
IADJ: ADJ pin source current
(0.05µA typ.: BA3259HFP)
(0.2µA typ.: BA30E00WHFP)
Vo2
ADJ
IADJ
R2
VADJ
R1
R1
BA3259HFP: 1 kΩ to 10 kΩ
BA30E00HFP: 1 kΩ to 5 kΩ
The above is recommended.
Datasheet
Note:Connect R1 and R2 to make output voltage settings as shown in Fig.1and Fig.2. Keep in mind that the offset
voltage caused by the current (IADJ) flowing out of the ADJ pin will become high if higher resistance is used.
●Function Explanation
1) Two-input power supply (BA30E00WHFP)
The input voltages (Vcc1 and Vcc2) supply power to two outputs (Vo1 and Vo2, respectively). The power dissipation
between the input and output pins can be suppressed for each output according to usage.
Efficiency comparison:
5V single input vs. 5V/3V two inputs
•Regulator with single input and two outputs
•Regulator with two inputs and two outputs
(Vo2=1.8V, Io1=Io2=0.3A)
Conventional
Vcc
5V
Vo1
REG1
REG2
Vo2
3.3 V/0.3 A
1.8 V/0.3 A
Power loss between input and output
(Vcc − Vo1) × Io1 + (Vcc − Vo2) × Io2
= (5 − 3.3) × 0.3 + (5 − 1.8) × 0.3
= 0.51W + 0.96W
= 1.47W
→ Single 5V input results in decreased
efficiency
Current
Vcc
5V
3V
REG1
Vo1
REG2
Vo2
3.3 V/0.3 A
1.8 V/0.3 A
Power loss between input and output
(Vcc1 − Vo1) × Io1 + (Vcc2 − Vo2) × Io2
= (5 − 3.3) × 0.3 + (5 − 1.8) × 0.3
= 0.51W + 0.36W
= 0.87W
Reduced power loss by
0.6W.
→ Additional 3V input improves efficiency
2) Standby function (BA30E00WHFP)
The standby function is operated through the EN pin. Output is turned on at 2.0 V or higher and turned off at 0.8 V or
lower.
●Power Dissipation
If the IC is used under the conditions of excess of the power dissipation, the chip temperature will rise, which will have an
adverse effect on the electrical characteristics of the IC, such as a reduction in current capability. Furthermore, if the
temperature exceeds Tjmax, element deterioration or damage may occur. Implement proper thermal designs to ensure that
the power dissipation is within the permissible range in order to prevent instantaneous IC damage resulting from heat and
maintain the reliability of the IC for long-term operation. Refer to the power derating characteristics curves in Fig.27.
・Power Consumption Pc (W) Calculation Method:
○BA3259HFP
IP
Vcc
Controller
Icc
GND
Vcc
Power
Tr
Vcc
Power
Tr
• Power consumption of 3.3 V power
transistor
Pc1=(Vcc − 3.3) × Io1
• Power consumption of Vo2 power
3.3 V
Vo1 output
Io1
transistor
Pc2=(Vcc − Vo2) × Io2
• Power consumption by circuit current
Pc3=Vcc × Icc
0.8 V to
3.3 V
¶
Pc=Pc1 + Pc2 + Pc3
Vo2 output * Vcc: Applied voltage
Io2 Io1: Load current on Vo1 side
Io2: Load current on Vo2 side
Icc: Circuit current
○BA30E00WHFP
Vcc1
IB1
Controller
Vcc2
IB2
Icc1+Icc2
GND
Vcc1
Power
Tr
Vcc2
Power
Tr
• Power consumption of power transistor on
Vo1 (3.3 V output)
Pc1=(Vcc1 − Vo1) × Io1
• Power consumption of power transistor on
3.3 V
output
Io1
Io1
Vo2 (variable output )
Pc2=(Vcc2 − Vo2) × Io2
• Power consumption by circuit current
Pc3=Vcc1 × Icc1 + Vcc2 × Icc2
0.8 V to
3.3 V
¶
Pc=Pc1 + Pc2 + Pc3
Io2 output * Vcc1, Vcc2: Applied voltage
Io2 Io1: Load current on 3.3 V output side
Io2: Load current on variable output side
Icc1, Icc2: Circuit currents
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
11/16
TSZ02201-0R6R0A600100-1-2
26.Jun.2012 Rev.001
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet BA30E00WHFP.PDF ] | |
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