1/4 STRUCTURE Silicon Monolithic Integrated Circuit TYPE Step-down Switching Regulator Integrated High Side Switch PRODUCT SERIES BD9070FP FEATURES ・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 Symbol Limits Unit 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 VIN VSW ISW VEN/SYNC VRT, VFB, VINV VDD HSDCTL HSDFLG OVPDET Pd Topr Tstg Tjmax 36 VIN 2.1（1） VIN 7 15 VDD 6 6 1.45（2） -40～+105 -55～+150 150 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 Symbol Min. Max. Unit Recommend Supply Voltage VIN 7 35 Ｖ Recommend Supply Voltage 2 VDD 2.7 5.5 V High Side Switch Current IHSW - 0.7 A Output Switch Current ISW - 2 A Oscillator Frequency FOSC 50 500 kHz External Synchronous Frequency FSYNC FOSC 500（3） kHz （3）However, do not exceed OSC×1.5. ＊The product is not designed for protection against radioactive rays REV. A 2/4 ◎ELECTRICAL CHARACTERISTICS (Unless otherwise specified Ta=25℃,VIN=13.2V,VEN=5V,VDD=5V,HSDCTL=5V) Parameter Min. Limits Typ. Max. ISTB Io - 0 4.3 10 9 uA mA VEN= 0V Io=0A,RT=51kΩ,INV=0.7V Symbol Unit Condition ［Entire Device］ Stand-by Current Operation Current ［Switch］ Leakage Current ［DC/DC］ Reference Voltage1 Reference Voltage2 Input Bias Current Switching Frequency1 Switching Frequency2 IoLEAK - 0 30 uA VIN=35V,VEN=0V VREF1 VREF2 IB FOSC1 FOSC2 0.784 0.784 -1 240 238.5 0.800 0.800 300 300 0.816 0.816 360 361.5 V V uA kHz kHz Synchronous Frequency FSYNC 495 500 505 kHz VFB=VINV VIN=10～16V,VFB=VINV VINV=0.6V RT=51kΩ VIN=10～16V,RT=51kΩ RT=51kΩ,EN/SYNC=500kHz, Duty=50% IOLIMIT 2.1 4 - A VENON VENOFF IEN VOVP VOVP HYS 2.6 0.95 - 35 1.00 50 0.8 90 1.05 - V V uA V mV RON ILEAK ITHLIM RFL IFLL 0.7 - 110 0 1.0 305 0 150 10 1.3 450 1 mΩ uA A Ω uA IFL=1mA VFLG=5V CTLH CTLL ICTL 2.0 -1.0 0.01 VDD 0.8 1.0 V V uA HSD CTL=0V or 5V TON1 TON2 TOFF1 TOFF2 TBLANK 6 0.8 1.1 2.7 19 8 6 10 20 40 10 ms ms us us ms RL=20Ω RL=20Ω RL=20Ω RL=20Ω RT=51kΩ,EN/SYNC=400kHz 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 TON / TOFF time REV. A VEN=5V Io=10mA HSDCTL=0V 3/4 ◎BLOCK DIAGRAM BATT ◎PHYSICAL DIMENTIONS・MARKING VIN CIN3 EN/SYNC RT SYN C RT UVL O TSD VREG OVP UVLOOVP OVP TSD VRE G VRE G 品番 VRE G OSC SLOP E R3 VRE G PW M C1 FB PVIN S VRE G ER R INV C3 VRE G VRE G VRE F VREG DRV LOGIC CB DRV R VREG SCP PVI N UVLO,TSD OVP,OCP,SC P SOFT START VREGB SW CIN2 CIN1 L1 C0 R1 VREG PVI N OCP BD9070FP BATT R2 R4 C2 Lo No. R5 R6 OCP SCP VDD VREG VDD VDD HSD CTL GN D UVLO TSD HSD UVLO Control Logic Charge Pump HSDSW VDD VREG OCD HSD UVLO HSOP25 （Unit：mm） HSDSW HSD UVLO PGND FL G ◎Pin No.・Pin Name Pin No. 1 2 3 4 5 6 7 Pin Name Function VREGB VIN N.C. N.C. PGND GND RT 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 8 EN/SYNC 9 10 11 12 13 HSDCTL FLG N.C. HSDSW HSDSW Pin No. 14 15 16 17 18 19 20 Pin Name N.C. VDD VDD OVP INV FB N.C. 21 SW DC/DC Output Pin 22 23 24 25 SW N.C. PVIN PVIN 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 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 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 改定日 改定理由 Rev0.0.1 2007/05/11 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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