BD9070FP

1/4 STRUCTURE Silicon Monolithic Integrated Circuit TYPE PRODUCT SERIES FEATURES Step-down Switching Regulator Integrated High Side Switch B D9070FP ・Integrated FET 1ch Step-down Switching Regulator ・1ch High Side Switch ・Over Voltage Protection which can be Variable by External Resisters ・Over Current Protection for Switching Regulator ・Over Current Protection for High Side Switch ・Thermal Shut Down Circuit ・Under Voltage Lock Out Circuit ・Over Current Detection Flag pin for High Side Switch ◎ABSOLUTE MAXIMUM RATINGS（Ta＝25℃）） Parameter Supply Voltage SW Pin Voltage Output SW Current EN, SYNC Pin Voltage RT, FB, INV Pin Voltage VDD Input Voltage HSDSW Control Voltage HSDSW Flag Voltage Over Voltage Protection Detection Terminal Power Dissipation Operating Temperature Range Storage Temperature Range Maximum Junction Temperature Symbol VIN VSW ISW VEN/SYNC VRT, VFB, VINV VDD HSDCTL HSDFLG OVPDET Pd Topr Tstg Tjmax Limits 36 VIN 2.1（1） VIN 7 15 VDD 6 6 1.45（2） -40～+105 -55～+150 150 Unit V V A V V V V V V W ℃ ℃ ℃ （1）However ,do not exceed Pd. （2）Pd derated at 5.52mW/℃ for temperature above Ta=25℃, Mounted on a double layer PCB 70mm×70mm×1.6mm. (with Thermal vias / Copper area：70mm×70mm) ◎OPERATING CONDITIONS （However、it does not guarantee the electric characteristic.） Parameter Recommend Supply Voltage Recommend Supply Voltage 2 High Side Switch Current Output Switch Current Oscillator Frequency External Synchronous Frequency （3）However, do not exceed OSC×1.5. ＊The product is not designed for protection against radioactive rays Symbol VIN VDD IHSW ISW FOSC FSYNC Min. 7 2.7 50 FOSC Max. 35 5.5 0.7 2 500 500（3） Unit Ｖ V A A kHz kHz REV. A 2/4 ◎ELECTRICAL CHARACTERISTICS (Unless otherwise specified Ta=25℃,VIN=13.2V,VEN=5V,VDD=5V,HSDCTL=5V) Parameter ［Entire Device］ Stand-by Current Operation Current ［Switch］ Leakage Current ［DC/DC］ Reference Voltage1 Reference Voltage2 Input Bias Current Switching Frequency1 Switching Frequency2 Synchronous Frequency Over Current Protection Operation Output Current Output ON Voltage Output OFF Voltage Sink Current Over Voltage Detection Voltage Over Voltage Hysteresis Voltage ［High Side Switch］ ［DC Characteristic］ ON Resistance Leakage Current Over Current Limit Threshold Level FLG Output Resistance FLG Output Leakage Current ［Control Terminal］ HSD CTL Input Voltage H HSD CTL Input Voltage L HSD CTL Input Current ［AC Characteristic］ Output Rise Time Output Turn On Delay Time Output Fall Time Output Turn Off Delay Time Over Current Blanking Time Symbol Min. 0.784 0.784 -1 240 238.5 495 2.1 2.6 0.95 Limits Typ. 0 4.3 0 0.800 0.800 300 300 500 4 35 1.00 50 Max. 10 9 30 0.816 0.816 360 361.5 505 0.8 90 1.05 Unit Condition ISTB Io IoLEAK VREF1 VREF2 IB FOSC1 FOSC2 FSYNC IOLIMIT VENON VENOFF IEN VOVP VOVP HYS uA mA uA V V uA kHz kHz kHz A V V uA V mV VEN= 0V Io=0A,RT=51kΩ,INV=0.7V VIN=35V,VEN=0V VFB=VINV VIN=10～16V,VFB=VINV VINV=0.6V RT=51kΩ VIN=10～16V,RT=51kΩ RT=51kΩ,EN/SYNC=500kHz, Duty=50% VEN=5V RON ILEAK ITHLIM RFL IFLL CTLH CTLL ICTL TON1 TON2 TOFF1 TOFF2 TBLANK 0.7 2.0 -1.0 6 110 0 1.0 305 0 0.01 0.8 1.1 2.7 19 8 TON / TOFF time 150 10 1.3 450 1 VDD 0.8 1.0 6 10 20 40 10 mΩ uA A Ω uA V V uA ms ms us us ms Io=10mA HSDCTL=0V IFL=1mA VFLG=5V HSD CTL=0V or 5V RL=20Ω RL=20Ω RL=20Ω RL=20Ω RT=51kΩ,EN/SYNC=400kHz REV. A 3/4 ◎BLOCK DIAGRAM ◎PHYSICAL DIMENTIONS・MARKING BATT CIN3 VIN EN/SYNC VREG RT RT SYN C VRE G VRE F VRE G VREG UVL O TSD OVP UVLOOVP OVP TSD VRE G VRE G VRE G 品番 PVIN CB DRV VREGB SW PVI N VREG PVI N OSC VRE G INV R3 C3 C1 FB ER R S VRE G BATT CIN2 CIN1 BD9070FP SLOP E DRV LOGIC R PW M VREG L1 C0 R1 R2 R4 C2 Lo No. R5 R6 SOFT START UVLO,TSD OVP,OCP,SC P SCP VREG OCP OCP VDD SCP VDD VDD HSD CTL GN D PGND UVLO TSD HSD UVLO Control Logic Charge Pump VDD VREG HSDSW HSDSW HSD UVLO OCD HSD UVLO HSOP25 （Unit：mm） FL G ◎Pin No.・Pin Name Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Pin Name VREGB VIN N.C. N.C. PGND GND RT EN/SYNC HSDCTL FLG N.C. HSDSW HSDSW Function FET Driver Drive Power Supply Pin Input Power Supply Pin Non-Connect (unused) Pin Non-Connect (unused) Pin Ground Pin Ground Pin Switching Frequency Setting Pin DC/DC ON/OFF Pin External Synchronous Pulse Input Pin High Side Switch ON/OFF Pin High Side Switch Over Current Flag Pin Non-Connect (unused) Pin High Side Switch Output Pin High Side Switch Output Pin Pin No. 14 15 16 17 18 19 20 21 22 23 24 25 Pin Name N.C. VDD VDD OVP INV FB N.C. SW SW N.C. PVIN PVIN Function Non-connect (unused) pin High Side Switch Input Pin High Side Switch Input Pin Over Voltage Protection Detection Pin Error Amp Input Pin Error Amp Output Pin Non-connect (unused) pin DC/DC Output Pin DC/DC Output Pin Non-connect (unused) pin Input power supply pin Input power supply pin ※Refer to the Technical Note about the details of the application. REV. A 4/4 NOTES FOR USE 1．Absolute maximum range Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed we cannot be defined the failure mode, such as short mode or open mode. Therefore physical security countermeasure, like fuse, is to be given when a specific mode to be beyond absolute maximum ratings is considered. 2．Operation supply voltage range The circuit functionality is guaranteed within operation of ambient temperature range, as long as it is within operation supply voltage range. The standard electrical characteristic values are guaranteed at the test circuit voltage of VIN=13.2V. They cannot be guaranteed at other voltages in the operating range of 7V-35V. However, the variation will be small. 3．Grounding It is recommended that every capacitor (bypass and another capacitors) is grounded to the ground pin using single-point connections. 4．Input supply voltage Input supply pattern layout should be as short as possible. 5．VIN Terminal For reduce the influence of switching noise, bypass capacitor is connected between VIN and GND. (over 2μF) 6. SOFT START The SOFT START block provides a function to prevent from the overshoot of the output voltage Vo through gradually increasing the normal rotation input of the error amplifier when power supply turns ON to gradually increase the switching Duty. The soft start time is set to 5 msec (typ.). 7．FB Terminal The FB terminal is for phase margin of the DC/DC system. A capacitor and a resistor or an only capacitor placed between the FB terminal and the INV terminal. The values of the capacitor and the resistor shall be adjusted according to the output current and the output capacitor value. The output may be oscillating if the value of capacitor is not sufficient, also the transient response may become insufficient if the value is too large. Therefore, the value of the capacitor and the resistor shall be adequately set up based on the condition of the temperature, and so on. Since the FB terminal also detects output short condition compulsorily applying an external voltage onto the FB terminal must not be performed because it may activate the timer latch protection circuit. 8．Electromagnetic Fields The IC is susceptible to strong electromagnetic fields and may cause malfunction. Therefore, caution should be used when placing it on the PCB. 9．Adjacent Pin short mistake fitting Use caution when orienting and positioning the IC for mounting on printed circuit boards. Improper mounting may result in damage to the IC. 10．Application Design When designing the external circuit, chose parts in condition of the enough margin that not only steady state but also transient characteristics contain. 11．Over Output Current Protection It is recommend not to use that continuously operates the protection circuit (For instance, always the load that greatly exceeds the output current ability is connected or the output is short-circuited, etc.) in these protection circuits by an effective one to the destruction prevention due to broken accident. 12. Short Circuit Protection (SCP) The short circuit protection operates when the output falls on 70% or less after the over current protection operates. When the short-circuit protection operates, the output voltage is turned off, and the average output current is limited between 1024 pulses of the sending frequency. When the input is turned on, this protection is off before setting voltage. 13．Temperature protection (thermal down) circuit This IC has a built-in temperature protection circuit to prevent from the thermal destruction of the IC. As described above, be sure to use this IC within the power dissipation range. Should a condition exceeding the power dissipation range continue, the chip temperature Tj will rise to activate the temperature protection circuit, thus turning OFF the output power element. Then, when the tip temperature Tj falls, the circuit will be automatically reset. Furthermore, if the temperature protection circuit is activated under the condition exceeding the Maximum Junction Temperature, do not attempt to use the temperature protection circuit for set design. REV. A 5/4 Version Rev0.0.1 改定日 2007/05/11 改定理由 初版 改定内容 REV. A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. 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