BD91362MUV

1/4 STRUCTURE PRODUCT NAME Silicon Monolithic Integrated Circuit Dual output DC / DC Converter IC built in synchronous rectifier, 2 with I C interface TYPE FEATURES BD91362MUV 2 ・Output Voltage：8bit Adjustable Setting with I C interface (FB1=FB2=0.900～1.075V / 25mV step) ・Output Current：3.0A/1.0A ・High Efficiency and Fast Transient Response 2 ・I C Compatible Interface(Device address '1100011') ○ABSOLUTE MAXIMUM RATING（Ta=25℃） Parameter AVcc Voltage PVcc Voltage VDVDD Voltage BST Voltage BST-SW Voltage EN・ SW・ITH Voltage SCL・SDA Voltage Power Dissipation 1 Power Dissipation 2 Power Dissipation 3 Power Dissipation 4 Operating Temperature Range Storage Temperature Range Operating Junction Temperature Symbol VCC PVCC Limit -0.3～+7 * 1 Unit V V V V V V V W W W W ℃ ℃ ℃ -0.3～+7 *1 -0.3～+7 *1 -0.3～+13 -0.3～+7 -0.3～+7 -0.3～+7 0.34 *2 0.70 *3 2.21 *4 3.56 *5 -40～+105 -55～+150 +150 DVDD VBST VBST-SW VEN VSDA ,VSCL Pd1 Pd2 Pd3 Pd4 Topr Tstg Tjmax *1 Pd, ASO, and Tj=150℃ should not be exceeded. *2 IC only. *3 1 layer, mounted on a board 74.2mm×74.2mm×1.6mm Glass-epoxy PCB (Copper foil area : 10.29mm2) *4 4 layers, mounted on a board 74.2mm×74.2mm×1.6mm Glass-epoxy PCB (1st ,4th Copper foil area :10.29mm2 2nd ,3rd Copper foil area : 5505mm2) *5 4 layers, mounted on a board 74.2mm×74.2mm×1.6mm Glass-epoxy PCB (Copper foil area : 5505mm2) , copper foil in each layers. ○OPERATING CONDITIONS（Ta=-40～+105℃） Parameter Vcc Voltage PVcc Voltage VDVDD Voltage EN Voltage SCL.SDA Voltage Output Voltage range*7 SW Average Output Current SW Average Output Current 6 Symbol VCC PVCC Min. 2.7 2.7 1.8 0 0 1.0 - Typ. 5.0 5.0 2.5 - Max. 5.5 5.5 VCC VCC Unit V V V V V V A A DVDD *6 VEN VSDA ,VSCL VOUT ISW1 ISW2 DVDD 3.3*8 3.0*9 1.0*9 * VDVDD < VCC , PVCC *7 Initial set of I2C interfece 8 * In case set output voltage 1.6V or more, VccMin.=VOUT+1.2V. *9 Pd and ASO should not be exceeded. This product is not designed for protection against radioactive rays. REV. C 2/4 ○ELECTRICAL CHARACTERISTICS Parameter Standby Current Bias Current EN Low Voltage EN High Voltage EN Input Current Oscillation Frequency High-side FET ON Resistance Low-side FET ON Resistance FB Reference Voltage1 FB Reference Voltage2 ITH sink current 1 ITH source current 1 ITH sink current 2 ITH source current 2 UVLO Threshold Voltage UVLO Release Voltage Soft Start Time Timer Latch Time Output Short circuit Threshold Voltage Digital I/O (SCL,SDA) INPUT Low Voltage INPUT High Voltage Inflow current Data Output Low voltage VIL VIH IIN VOL 0.8×DVDD GND 0.2×DVDD 10 0.6 V V μA V SCL=SDA=2.5V IOL=6mA （Unless otherwise specified , Ta=25℃ VCC=PVCC=5.0V, DVDD =2.5V, EN=VCC） Symbol ISTB ICC VENL VENH IEN FOSC RONH1 RONH2 RONL1 RONL2 FB1 FB2 ITHSI1 ITHSO1 ITHSI2 ITHSO2 VUVLOL VUVLOH TSS TLATCH VSCP1 VSCP2 Limit Min. 2.0 0.8 0.985 0.985 10 10 10 10 2.4 2.425 0.5 0.5 Typ. 0 500 GND Vcc 2 1 60 170 55 130 1.0 1.0 18 18 18 18 2.5 2.55 1 1 0.5 0.5 Max. 20 800 0.8 10 1.2 90 255 83 195 1.015 1.015 2.6 2.7 2 2 0.7 0.7 Unit μA μA V V μA MHz mΩ mΩ mΩ mΩ V V μA μA μA μA V V ms ms V V ±1.5% ±1.5% EN=0V Condition Standby Mode Active Mode EN=2V VFB1=1.2V VFB1=0.8V VFB2=1.2V VFB2=0.8V VCC=5→0V VCC=0→5V SCP/TSD ON FB1=1.0→0V(initial) FB2=1.0→0V(initial) DVDD 0 - ○PHYSICAL DIMENSION ○PIN No., PIN NAME PIN No 1 PIN NAME PVCC1 BST SW1 SW1 SW1 PGND1 PGND1 PGND1 PGND2 SW2 PVCC2 EN PIN No 13 14 15 16 17 18 19 20 21 22 23 24 PIN NAME GND ITH2 FB2 ITH1 FB1 VCC SCL SDA ○FB Reference voltage FB1,FB2 0.900 V 0.925 V 0.950 V 0.975 V 1.000 V 1.025 V 1.050 V 1.075 V *FB1,FB2 change after 10usec(max) pass from setting the voltage by I2C interface *The time of 1step for FB1,FB2(25mV shift) take 5usec(max). *The time that output voltage reaches the setting value is 0.06msec(max). (initial) 91362 2 3 Lot No. 4 5 6 7 8 9 10 11 12 DVDD N.C PVCC1 PVCC1 ○SETTING THE OUTPUT VOLTAGE SW R2 VQFN024V4040 (Unit:mm) ADJ R1 VOUT The Output Voltage is set by the external resistor divider and is calculated as： Vout=(R2/R1+1)×VFB ・・・ ① VFB：FB pin feedback Voltage (1.0V typ) It’ s possible to adjust the output voltage by R1 and R2. (The Vout must be set from 1.0V to 3.3V. 2 To control I C BUS,The Vout can be set 0.9～3.475V) Resistance R1≒10kΩ is recommended. Please confirm the ripple voltage, if you can use the resistance more than 100kΩ. REV. C 3/4 ○BLOCK DIAGRAM・APPLICATION CIRCUIT EN VCC ITH1 FB1 Gm Amp Current Comp R S Q Current Sense/ Protect BST PVCC1 VIN SW1 PVCC DVDD Soft Start1 Slope1 + Driver Logic SCP1 VOUT1 PGND1 FB1 DVDD I2C Master SDA SCL I2C I/F SELECTOR VREF CLK1 OSC CLK2 SCP/ TSD UVLO SCP2 Current Comp Gm Amp R S Slope2 Q PVCC2 Current Sense/ Protect + Driver Logic VIN FB2 Soft Start2 SW2 VOUT2 PGND2 CLK2 ITH2 FB2 GND ○I2C - BUS control map Byte 1 2 FB1[2:0] Bit7 Bit6 Bit5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 R/W FB2[2:0] 0 DEVICE ADDRESS[6:0] 0 Byte 1 is DEVICE ADDRESS:[1100011] Byte 2 is DATA BIT, from Bit5 to Bit7 set FB2[2:0] , from Bit1 to Bit3 set FB1[2:0]. Bit0 and Bit4 input ‘0’ . The mode of this IC is WRITE MODE only. REGSEL REGISTER (Write), initial value : 00h REGISTRE REGSEL R/W W Bit7 Bit6 FB1[2:0] Bit5 Bit4 0 Bit3 Bit2 FB2[2:0] Bit1 Bit0 0 0 0 0 0 0 0 0 0 Bit [7:5]: FB1[2:0] Set CH1 output voltage Bit [3:1]: FB2[2:0] Set CH2 output voltage “000”： 1.000V(initial) “001”： 0.925V “010”： 0.950V “011”： 0.975V “100”： 0.900V “101”： 1.025V “110”： 1.050V “111”： 1.075V “000”： 1.000V(initial) “001”： 0.925V “010”： 0.950V “011”： 0.975V “100”： 0.900V “101”： 1.025V “110”： 1.050V “111”： 1.075V REV. C 4/4 ○NOTES FOR USE (1) Absolute Maximum Ratings We are careful enough for quality control about this IC. So, there is no problem under normal operation, excluding that it exceeds the absolute maximum ratings. However, this IC might be destroyed when the absolute maximum ratings, such as impressed voltages or the operating temperature range, is exceeded, and whether the destruction is short circuit mode or open circuit mode cannot be specified. Take into consideration the physical countermeasures for safety, such as fusing, if a particular mode that exceeds the absolute maximum rating is assumed. (2) GND Potential Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage except for SW, PGND, GND terminals including an actual electric transient. (3) Thermal design Do not exceed the power dissipation (Pd) of the package specification rating under actual operation, and design enough temperature margins. (4) Short circuit mode between terminals and wrong mounting In order to mount the IC on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can destroy the IC. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the IC can destroy (5) Operation in Strong electromagnetic field Be noted that using the IC in the strong electromagnetic radiation can cause operation failures. (6) ASO(Area of Safety Operation.) Do not exceed the maximum ASO and the absolute maximum ratings of the output driver. (7) TSD(Thermal Shut-Down) circuit The thermal shutdown circuit (TSD circuit) is built in this product. When IC chip temperature becomes higher, the thermal shutdown circuit operates and turns output off. The guarantee and protection of IC are not purpose. Therefore, do not use this IC after TSD circuit operates, nor use it for assumption that operates the TSD circuit. (8) GND wiring pattern Use separate ground lines for control signals and high current power driver outputs. Because these high current outputs that flows to the wire impedance changes the GND voltage for control signal. Therefore, each ground terminal of IC must be connected at the one point on the set circuit board. As for GND of external parts, it is similar to the above-mentioned. (9) Operation in supply voltage range Functional Circuit operation is guaranteed within operation ambient temperature, as long as it is within operation supply voltage range. The electrical characteristics standard value cannot be guaranteed. However, there is no drastic variation in these values, as long as it is within operation supply voltage range. (10) We are confident in recommending the above application circuit example, but we ask that you carefully check the characteristics of this circuit before using it. If using this circuit after modifying other external circuit constants, be careful to ensure adequate margins for variation between external devices and this IC, including not only static characteristics but also transient characteristics. If switching noise is high, insert the Low pass filter between Vcc pin and PVcc pin, insert the schottky barrier diodes between SW pin and PGND pin. (11) Overcurrent protection circuit The overcurrent protection circuit is built in the output. If the protection circuit operates more than for specific hours (when the load is short.), the output will be latched in OFF. The output returns when EN is turned on or UVLO is released again. These protection circuits are effective in the destruction prevention by broken accident. Do not use in continuous circuit operation. (12) Selection of inductor It is recommended to use an inductor with a series resistance element (DCR) 0.1Ω or less. Note that use of a high DCR inductor will cause an inductor loss, resulting in decreased output voltage. Should this condition continue for a specified period (soft start time + timer latch time), output short circuit protection will be activated and output will be latched OFF. When using an inductor over 0.1Ω, be careful to ensure adequate margins for variation between external devices and this IC, including transient as well as static characteristics. (13) DVDD The operating voltage range for DVDD is 1.8V~3.6V. The IC may not operate normally when the voltage is below than 1.8V. Therefore, a stabile power supply is required to ensure the supply voltage is within the DVDD operating voltage range. When I2C is not been used, DVDD must be shorted to VCC. Please be noticed that the output voltage from this IC can not be supplied to the DVDD. REV. C 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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