Secondary LDO Regulators Secondary Dual-Output (Fixed/Variable) LDO Regulators BA3259HFP,BA30E00WHFP No.11026EBT02 ●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 1) Output voltage accuracy: ± 2%. 2) Reference voltage accuracy: ± 2% 3) Output current capacity: 1 A (BA3259HFP), 0.6 A (BA30E00WHFP) 4) Ceramic capacitor can be used to prevent output oscillation (BA3259HFP) 6) Low dissipation with two voltage input supported (BA30E00WHFP) 7) Built-in thermal shutdown circuit 8) Built-in overcurrent protection circuit ●Applications Available to all commercial devices, such as FPD, TV, and PC sets besides DSP power supplies for DVD and CD sets. ●Product Lineup Part Number Output voltage Vo1 Output voltage Vo2 Output Current Io1 Output Current Io2 Package BA3259HFP 3.3 V 0.8 V to 3.3 V 1 A max 1 A max HRP5 BA30E00WHFP 3.3 V 0.8 V to 3.3 V 0.6 A max 0.6 A max HRP7 ●Absolute Maximum Ratings BA3259HFP Parameter BA30E00WHFP Symbol Ratings Units Applied voltage Vcc 15 *1 V Power dissipation Pd 2300 *2 mW Topr 0 to 85 ℃ Tstg −55 to 150 ℃ Tjmax 150 ℃ Operating temperature range Ambient storage temperature range Maximum junction temperature Parameter Symbol Ratings Units Applied voltage Vcc 18 *1 V Power dissipation Pd 2300 *2 mW Topr −25 to 105 ℃ Tstg −55 to 150 ℃ Tjmax 150 ℃ Operating temperature range Ambient storage temperature range Maximum junction temperature *1 Must not exceed Pd. *2 Derated at 18.4 mW/℃ at Ta>25℃ when mounted on a glass epoxy board (70 mm 70 mm 1.6 mm). www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 1/10 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●Recommended Operating Conditions BA3259HFP Parameter Symbol BA30E00WHFP Ratings Min. Unit Typ. Max. Input power supply voltage Vcc 4.75 − 14.0 V 3.3 V output current Io1 − − 1 A Variable output current Io2 − − 1 A Parameter Symbol Input power supply voltage 1 Input power supply voltage 2 Ratings Min. Unit Vcc1 4.1 − 16.0 V Vcc2 2.8 − Vcc1 V 3.3 V output current Io1 − − 0.6 A Variable output current Io2 − − 0.6 A ●Electrical Characteristics ○BA3259HFP (Unless otherwise specified, Ta=25℃, Vcc=5 V, R1=R2=5 kΩ) Limits Parameter Symbol Unit Min. Typ. Max. Circuit current Typ. Max. Conditions Io1=0 mA, Io2=0mA IB − 3 5 mA Vo1 3.234 3.300 3.366 V Io1=50mA ∆Vd1 − 1.1 1.3 V Io1=1 A, Vcc=3.8V Io1 1.0 − − A R.R.1 46 52 − dB f=120Hz, ein=0.5Vp-p, Io1=5mA Input stability 1 ∆VLINE1 − 5 15 mV Vcc=4.75→14V, Io1=5mA Load stability 1 ∆VLOAD1 − 5 20 mV Io1=5mA→1 A Tcvo1 − ±0.01 − %/℃ Reference voltage VREF 0.784 0.800 0.816 V Io2=50 mA Minimum I/O voltage difference 2 ∆Vd2 − 1.1 1.3 V Io2=1 A Io2 1.0 − − A R.R.2 46 52 − dB f=120Hz, ein=0.5 Vp-p, Io2=5mA Input stability 2 ∆VLINE2 − 5 15 mV Vcc=4.75→14V, Io2=5mA Load stability 2 ∆VLOAD2 − 5 20 mV Io2=5 mA→1 A Tcvo2 − ±0.01 − %/℃ IADJ − 0.05 1.0 µA [3.3 V Output Block] Output voltage 1 Minimum I/O voltage difference 1 Current capability 1 Ripple rejection 1 Temperature coefficient of output voltage 1 *3 Io1=5mA,Tj=0℃ to 85℃ [Variable output] Current capability 2 Ripple rejection 2 Temperature coefficient of *3 output voltage 2 Variable pin current Io2=5mA,Tj=0℃ to 85℃ VADJ=0.85V *3 Operation is guaranteed within these parameters www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 2/10 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ○BA30E00WHFP (Unless otherwise specified, Ta=25℃, Vcc1=Vcc2=VEN=5 V, R1=50 kΩ, R2=62.5 kΩ) Limits Parameter Symbol Unit Conditions Min. Typ. Max. Bias current Ib − 0.7 1.6 mA Io1=0mA, Io2=0mA Standby current IST − 0 10 µA VEN=GND EN pin on voltage VON 2.0 − − V Active mode EN pin off voltage VOFF − − 0.8 V Standby mode IEN − 50 100 µA VEN=3.3V Vo1 3.234 3.300 3.366 V Io1=50mA ∆Vd1 − 0.30 0.60 V Io1=300mA,Vcc=3.135V Io1 0.6 − − A Ripple rejection 1 R.R.1 − 68 − dB f=120Hz, ein=1Vp-p,Io1=100mA Input stability 1 Reg.I1 − 5 30 mV Vcc1=4.1→16V,Io1=50mA Load stability 1-1 Reg.L1-1 − 30 90 mV Io1=0 mA→0.6A Load stability 1-2 Reg.L1-2 − 30 90 mV Vcc1=3.7V,Io1=0→0.4A Tcvo1 − ±0.01 − %/℃ Reference voltage VADJ 0.784 0.800 0.816 V Io2=50 mA Minimum I/O voltage difference 2 ∆Vd2 − 0.30 0.60 V At Io2=3.3V Io2=300mA,Vcc1=Vcc2=3.135V Io2 0.6 − − A Ripple rejection 2 R.R.2 − 66 − dB f=120 Hz,ein=1Vp-p,Io2=100mA Input stability 2 Reg.I2 − 5 30 mV Vcc1=Vcc2=4.1V→16V,Io2=50mA Load stability 2 Reg.L2 − 30 90 mV Io2=0mA→0.6A Tcvo2 − ±0.01 − %/℃ EN pin current [3.3 V output] Output voltage 1 Minimum I/O voltage difference 1 Output current capacity 1 Temperature coefficient of *3 output voltage 1 Io1=5mA,Tj=0℃ to 125℃ [Variable output] (at 1.8 V) Output current capacity 2 Temperature coefficient of output voltage 2 *3 Io2=5mA,Tj=0℃ to 125℃ *3 Operation is guaranteed within these parameters www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 3/10 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●BA3259HFP Electrical Characteristics Curves (Unless otherwise specified, Ta=25℃, Vcc=5 V) 3.0 2.5 2.0 1.5 1.0 ADJ PIN CURRENT：IADJ ［μA］ 3.5 CIRCUIT CURRENT：IB［mA］ CIRCUIT CURRENT：Icc［mA］ 60 5 4.0 4 3 2 1 2 4 6 8 10 12 0.0 14 0.2 20 0.4 0.6 0.8 1.0 5 3.5 1.4 3.5 2.5 2.0 1.5 1.0 0.5 OUTPUT VOLTAGE：Vo1［V］ 4.0 OUTPUT VOLTAGE：Vo2［V］ 1.6 3.0 1.2 1.0 0.8 0.6 0.4 6 8 10 12 14 10 11 12 13 3.0 2.5 2.0 1.5 1.0 0 2 4 6 8 10 12 0.0 14 0.5 1.0 1.5 2.0 SUPPLY VOLTAGE：Vcc［V］ OUTPUT CURRENT：Io1［A］ Fig. 4 Input Stability (3.3 V output with no load) Fig. 5 Input Stability (Variable output with no load) Fig. 6 Load Stability (3.3 V output) 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 1.2 1.0 0.8 0.6 0.4 0.2 70 R.R.(Variable output :1.5 V) 60 50 40 0.0 0.2 0.4 0.6 0.8 20 10 10 1.0 OUT PUT CURRENT ：Io1［A］ Fig. 7 Load Stability (Variable output: 1.5 V) Fig. 8 I/O Voltage Difference (3.3 V output) (3.3 V output, Io1=0 A 1 A) 1.504 5.0 3.29 3.28 3.27 CIRCUIT CURRENT：IB［mA］ 5.5 OUTPUT VOLTAGE：Vo2［V］ 1.506 3.30 1.502 1.500 1.498 1.496 1.494 1.492 3.26 -30 -15 0 15 30 45 60 75 TEMPERATURE：Ta［℃］ Fig. 10 Output Voltage vs Temperature (3.3 V output) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 10000 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.490 3.25 1000 Fig.9 R.R. 3.34 3.31 100 FREQUENCY：f［Hz］ 3.35 3.32 R.R.(3.3 V output) 30 0 0.0 OUTPUT CURRENT：Io2［A］ 3.33 2.5 80 1.4 RIPPLE REJECTION：R.R.［dB］ 1.4 INPUT/OUTPUT VOLTAGE DIFFERENCE ：dVd［V］ SUPPLY VOLTAGE：Vcc［V］ 1.6 14 0.0 0.0 4 9 0.5 0.2 0.0 8 Fig.3 ADJ Pin Outflow Current 4.0 2 7 SUPPLY VOLTAGE：Vcc［V］ Fig.2 Circuit Current vs Load Current Io Fig.1 Circuit Current (with no load) 0 6 OUTPUT CURRENT：Io1［A］ SUPPLY VOLTAGE：Vcc［V］ OUTPUT VOLTAGE：Vo1［V］ 30 10 0 0 OUTPUT VOLTAGE：Vo2［V］ 40 0.5 0.0 OUTPUT VOLTAGE：Vo1［V］ 50 -30 -15 0 15 30 45 60 75 TEMPERATURE：Ta［℃］ Fig. 11 Output Voltage vs Temperature (Variable output: 1.5 V) 4/10 -30 -15 0 15 30 45 60 75 TEMPERATURE：Ta［℃］ Fig. 12 Circuit Current vs Temperature 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP 40 1.6 35 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 30 25 20 15 10 5 2 4 6 8 10 12 14 16 18 0.0 0.2 0.1 0.1 0.2 0.3 0.4 0.5 0.0 0.6 0.6 0.8 1.0 1.2 1.4 1.6 ADJ PIN VOLTAGE：VADJ ［V］ Fig.13 Circuit Current (with no load) Fig. 14 Circuit Current vs Load Current Io (Io=0 600 mA) Fig. 15 ADJ Pin Source Current 3.5 1.4 3.5 3.0 2.5 2.0 1.5 1.0 OUTPUT VOLTAGE：Vo1［V］ 4.0 OUTPUT VOLTAGE：Vo2［V］ 1.6 1.2 1.0 0.8 0.6 0.4 0.0 4 6 8 10 12 14 16 18 0 2 4 SUPPLY VOLTAGE：Vcc［V］ Fig. 16 Input Stability (3.3 V output Io1=600 mA) 1.5 1.0 0.5 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 6 8 10 12 14 16 1.5 1.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 SUPPLY VOLTAGE：Vcc［V］ OUTPUT CURRENT：Io1［A］ Fig. 17 Input Stability (Variable output: 1.8 V) Fig. 18 Load Stability (3.3 V output) 0.4 0.3 0.2 0.1 Vo2(Variable output:1.8V) 70 60 50 Vo1(3.3V output) 40 30 20 10 0 0.0 0.0 0.1 0.2 0.3 0.4 0.5 100 0.6 1000 10000 OUTPUT CURRENT：Io2［A］ OUTPUT CURRENT：Io［A］ FREQUENCY：f［Hz］ Fig. 19 Load Stability (Variable output: 1.8 V) Fig. 20 I/O Voltage Difference (Vcc=3.135 V, 3.3 V output) Fig.21 R.R. (ein=1 Vp-p, Io=100 mA) 3.35 1.6 80 0.5 1.6 2.0 18 RIPPLE REJECTION：R.R.［dB］ INPUT/OUTPUT VOLTAGE DIFFERENCE： ΔVd［V］ 2.0 2.5 0.0 0.0 2 3.0 0.5 0.2 0.0 0.4 OUTPUT CURRENT：Io［A］ 4.0 0 0.2 SUPPLY VOLTAG E：Vcc［V］ 0.5 OUTPUT VOLTAGE：Vo2［V］ 0.3 0.0 0 0 OUTPUT VOLTAGE：Vo1［V］ 0.4 ADJ PIN CURRENT：IADJ ［μA］ 1.8 CIRCUIT CURRENT：Icc［mA］ CIRCUIT CURRENT：Ic c［ mA］ ●BA30E00WHFP Electrical Characteristics Curves (Unless otherwise specified, Ta=25℃, Vcc1=Vcc2=5V) 1.0 1.90 3.33 3.30 3.28 CIRCUIT CURRENT：Icc［mA］ OUTPUT VOLTAGE：Vo2［V］ OUTPUT VOLTAGE：Vo1［V］ 0.9 1.85 1.80 1.75 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 3.25 0.0 1.70 -25 -10 5 20 35 50 65 80 95 TEMPERATURE：Ta［℃］ Fig. 22 Output Voltage vs Temperature (3.3 V output) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. -25 -10 5 20 35 50 65 80 95 TEMPERATURE：Ta［℃］ Fig. 23 Output Voltage vs Temperature (Variable output: 1.8 V) 5/10 -25 -10 5 20 35 50 65 80 95 TEMPERATURE：Ta［℃］ Fig. 24 Circuit Current vs Temperature (I 0 A) 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●Block Diagrams / Standard Example Application Circuits VO1 5 Current Limit GND(Fin) Vcc1 3.3V CO1 Current Limit 1μF VO2 GND FIN 1.5V 4 Current Limit Sat. Prevention Vcc2 CO2 GND 3 Thermal Shutdown Thermal Shut Down 1μF Current Limit Vcc2 Sat. Prevention R2 ADJ 2 Vcc1 Reference Voltage R1 Vcc 1 VREF VIN EN 1 CIN 3.3μF Pin name 2 Vcc1 3 1μF Fig.25 BA3259HFP Block Diagram Pin No. Vcc2 GND 1μF 4 Vo1 5 47μF Vo2 47μF 6 ADJ R2 7 R1 Fig.26 BA30E00WHFP Block Diagram Pin No. Function Pin name Function 1 Vcc Power supply pin 1 EN 2 ADJ Variable output voltage detection pin 2 Vcc2 Power supply pin 2 3 GND GND pin 3 Vcc1 Power supply pin 1 Output on/off control pin: High active 4 Vo2 Variable output pin 4 GND GND pin 5 Vo1 3.3 V output pin 5 Vo1 Power supply pin for 3.3 V output FIN GND GND pin 6 Vo2 Variable output voltage detection pin (0.8 V to 3.3 V) Vcc (1Pin) External capacitor setting range Approximately 3.3µF Vo1 (5Pin) 1 µF to 1000 µF Vo2 (4Pin) 1 µF to 1000 µF PIN 7 ADJ Variable output voltage detection pin FIN GND GND pin TOP VIEW PIN 1 2 3 4 5 Vcc1 (3Pin) Vcc2 (2Pin) Vo1 (5Pin) Vo2 (6Pin) External capacitor setting range Approximately 1 µF Approximately 1 µF 47 µF to 1000 µF 47 µF to 1000 µF HRP5 TOP VIEW 1 2 3 4 5 6 7 HRP7 ●Setting the Output Voltage Vo2 The following output voltage setting method applies to the variable output pin. R2 ) - R2 IADJ Vo2=VADJ ( 1 + R1 VADJ: Output feedback reference voltage (0.8 V typ.) (0.05µA typ.: BA3259HFP) IADJ: ADJ pin source current (0.2µA typ.: BA30E00WHFP) Vo2 ADJ IADJ R2 VADJ R1 BA3259HFP: 1 kΩ to 10 kΩ BA30E00HFP: 1 kΩ to 5 kΩ The above is recommended. R1 Note:Connect R1 and R2 to make output voltage settings as shown in Fig.25 and Fig.26. 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. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 6/10 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●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 5V Vcc Vo1 3.3 V/0.3 A REG1 Vo2 REG2 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 3.3 V/0.3 A Vo1 REG1 1.8 V/0.3 A Vo2 3V REG2 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. ●Thermal Design 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 Vcc Vcc IP Power Tr Controller Vcc Power Tr Icc GND Power consumption of 3.3 V power transistor Pc1=(Vcc − 3.3) Io1 Power consumption of Vo2 power transistor 3.3 V Pc2=(Vcc − Vo2) Io2 output Vo1 Power consumption by circuit current Io1 Pc3=Vcc Icc 0.8 V to Pc=Pc1 + Pc2 + Pc3 3.3 V output * Vcc: Applied voltage Vo2 Io1: Load current on Vo1 side Io2 Io2: Load current on Vo2 side Icc: Circuit current ○BA30E00WHFP Vcc1 Vcc1 Controller IB1 Power Tr Vcc2 IB2 Vcc2 Power Tr Icc1+Icc2 GND Power consumption of power transistor on Vol1 (3.3 V output) Pc1=(Vcc1 − Vo1) Io1 Power consumption of power transistor on Vo2 (variable output ) 3.3 V Pc2=(Vcc2 − Vo2) Io2 output Io1 Power consumption by circuit current Io1 Pc3=Vcc1 Icc1 + Vcc2 Icc2 0.8 V to Pc=Pc1 + Pc2 + Pc3 3.3 V Io2 output * Vcc1, Vcc2: Applied voltage Io1: Load current on 3.3 V output side Io2 Io2: Load current on variable output side Icc1, Icc2: Circuit currents The Icc (circuit current) varies with the load. Refer to the above and implement proper thermal designs so that the IC will not be used under conditions of www.rohm.com Stable region 0.1 0.05 0.02 0.01 0 Fig. 27 Ambient Temperature vs. Power Dissipation © 2011 ROHM Co., Ltd. All rights reserved. Unstable region 2.0 1.0 0.5 0.2 200 400 600 Io [mA] 10.0 5.0 2.0 1.0 0.7 0.5 0.2 0.1 0.05 0.02 0.01 0 800 1000 Fig.28 BA3259HFP ESR 7/10 Unstable region ESR [Ω] 10.0 5.0 ESR [Ω] POWER DISSIPATION: Pd [W] excess power dissipation Pd under all operating temperatures. 10 Board size: 70 mm 70 mm 1.6 mm 9 (with a thermal via incorporated by the board) Board surface area: 10.5 mm 10.5 mm 8 (3) 7.3W (1) 2-layer board (Backside copper foil area: 15 mm 15 mm) (2) 2-layer board (Backside copper foil area: 70 mm 70 mm) 7 (3) 4-layer board (Backside copper foil area: 70 mm 70 mm) 6 (2) 5.5W 5 4 3 (1) 2.3W 2 1 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE: Ta [°C] Stable region Unstable region 200 400 600 Io [mA] 800 1000 Fig.29 BA30E00WHFP ESR 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●Input / Output Equivalent Circuits BA3259HFP Vcc BA30E00WHFP Vcc1 Vcc Vcc2 Vcc1 Vo1 Vo1 Fig.30 Vo2 Vo2 ADJ BA3259HFP I/O Equivalent Circuits ADJ Fig.31 BA30E00WHFP I/O Equivalent Circuit ●Explanation of external components ○BA3259HFP 1) Vcc (Pin 1) It is recommended that a ceramic capacitor with a capacitance of approximately 3.3µF is placed between Vcc and GND at a position closest to the pins as possible. 2) Vo (Pins 4 and 5) Insert a capacitor between Vo and GND in order to prevent output oscillation. The capacitor may oscillate if the capacitance changes as a result of temperature fluctuations. Therefore, it is recommended that a ceramic capacitor with a temperature coefficient of X5R or above and a maximum capacitance change (resulting from temperature fluctuations) of ±10% be used. The capacitance should be between 1µF and 1,000µF. (Refer to Fig. 28.) ○BA33E00HFP 1) Vcc1 (Pin 3) and Vcc2 (Pin 2) Insert capacitors with a capacitance of 1µF between Vcc1 and GND and Vcc2 and GND. The capacitance value will vary depending on the application. Be sure to implement designs with sufficient margins. 2) Vo1 (Pin 5) and Vo2 (Pin 6) Insert a capacitor between Vo and GND in order to prevent oscillation. The capacitance of the capacitor may greatly vary with temperature changes, making it impossible to completely prevent oscillation. Therefore, use a tantalum aluminum electrolytic capacitor with a low ESR (Equivalent Serial Resistance) that ensures good performance characteristics at low temperatures. The output oscillates if the ESR is too high or too low. Refer to the ESR characteristics in Fig. 29 and operate the IC within the stable operating region. If there is a sudden load change, use a capacitor with a higher capacitance. A capacitance between 47µF and 1,000µF is recommended. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 8/10 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●Notes for use 1) Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2) GND voltage The potential of GND pin must be minimum potential in all operating conditions. 3) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. 4) Inter-pin shorts and mounting errors Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or if pins are shorted together. 5) Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 6) Testing on application boards When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress. Always discharge capacitors after each process or step. Always turn the IC's power supply off before connecting it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an antistatic measure. Use similar precaution when transporting or storing the IC. 7) Regarding input pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example, the relation between each potential is as follows: When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes can occur inevitable in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. 8) Ground wiring patterns When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change the GND wiring pattern of any external components, either. 9) Thermal Shutdown Circuit (TSD) This IC incorporates a built-in thermal shutdown circuit for protection against thermal destruction. Should the junction temperature (Tj) reach the thermal shutdown ON temperature threshold, the TSD will be activated, turning off all output power elements. The circuit will automatically reset once the chip's temperature Tj drops below the threshold temperature. Operation of the thermal shutdown circuit presumes that the IC's absolute maximum ratings have been exceeded. Application designs should never make use of the thermal shutdown circuit. 10) Overcurrent protection circuit An overcurrent protection circuit is incorporated in order to prevention destruction due to short-time overload currents. Continued use of the protection circuits should be avoided. Please note that current increases negatively impact the temperature. 11) Damage to the internal circuit or element may occur when the polarity of the Vcc pin is opposite to that of the other pins inapplications. (I.e. Vcc is shorted with the GND pin while an external capacitor is charged.) Use a maximum capacitance of 1000 mF for the output pins. Inserting a diode to prevent back-current flow in series with Vcc or bypass diodes between Vcc and each pin is recommended. 抵抗 Resistor C B ～ ～ C ～ ～ (PIN B） B) （端子 B E ～ ～ ( PIN A)A） （端子 Diode for preventing back current flow (PINB) Transistor (NP N) トランジスタ(NPN) Bypass diode E GND VCC GND N Output pin P＋ P＋ N Ｎ N substr ate PP基板 PＰ P＋ N N N 寄生素子 Parasitic element N Ｎ (PINA) ～ ～ P P＋ Other adjacent elements Parasitic element P substrate P 基板 GND G ND GND Parasitic element Fig. 32 Bypass diode www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Fig. 33 Example of Simple Bipolar IC Architecture 9/10 2011.03 - Rev.B Technical Note BA3259HFP,BA30E00WHFP ●Ordering part number B A 3 Part No. 2 5 9 Part No. 3259 30E00W H F P - Package HFP: HRP5 HRP7 T R Packaging and forming specification TR: Embossed tape and reel HRP5 <Tape and Reel information> 8.82 ± 0.1 (6.5) 0.08±0.05 1.2575 1 2 3 4 0.835±0.2 1.523±0.15 8.0±0.13 (7.49) 1.905±0.1 10.54±0.13 1.017±0.2 9.395±0.125 (MAX 9.745 include BURR) Tape Embossed carrier tape Quantity 2000pcs Direction of feed TR direction is the 1pin of product is at the upper right when you hold ( The ) reel on the left hand and you pull out the tape on the right hand 1pin 5 +5.5° 4.5°−4.5° +0.1 0.27 −0.05 0.73±0.1 0.08 S 1.72 S Direction of feed Reel (Unit : mm) ∗ Order quantity needs to be multiple of the minimum quantity. HRP7 <Tape and Reel information> 1.905±0.1 0.8875 1 2 3 4 0.835±0.2 8.0±0.13 (7.49) 8.82±0.1 (6.5) 5 6 7 1.523±0.15 10.54±0.13 1.017±0.2 9.395±0.125 (MAX 9.745 include BURR) Tape Embossed carrier tape Quantity 2000pcs Direction of feed TR The direction is the 1pin of product is at the upper right when you hold ( reel on the left hand and you pull out the tape on the right hand ) 1pin +5.5° 4.5° −4.5° 0.08±0.05 +0.1 0.27 -0.05 0.73±0.1 1.27 S Direction of feed 0.08 S www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Reel (Unit : mm) 10/10 ∗ Order quantity needs to be multiple of the minimum quantity. 2011.03 - Rev.B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. R1120A