Single-chip Type with Built-in FET Switching Regulator Series Output 1.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET No.09027EAT40 BD9153MUV Description ROHMs high efficiency dual step-down switching regulators and Linear Regulator Controller, BD9153MUV is a power supply designed to produce a low voltage including 3.3,0.8 volts from 5.5/4.5 volts power supply line. Offers high efficiency with our original pulse skip control technology and synchronous rectifier. Employs a current mode control system to provide faster transient response to sudden change in load. Features 1) Offers fast transient response with current mode PWM control system. TM 2) Offers highly efficiency for all load range with synchronous rectifier (Pch/Nch FET) and SLLM (Simple Light Load Mode) 3) Incorporates Nch FET controller for Linear Regulator. 4) Incorporates reset function with 50ms counter. 5) Incorporates soft-start fanction, thermal protection and ULVO functions. 6) Incorporates short-current protection circuit with time delay function. 7) Incorporates shutdown function Icc=0A(Typ.) 8) Employs small surface mount package : VQFN024V4040 Applications Power supply for LSI including DSP, Micro computer and ASIC Absolute Maximum Rating (Ta=25) Parameter Symbol Limit Unit 1 Vcc,PVcc Voltage VCC,PVCC -0.3+7* V FB1,FB2,FB3,VS Voltage VFB1, VFB2, VFB3, VVS -0.3+7 V SW1,SW2,ITH1,ITH2 Voltage VSW1, VSW2, VITH1, V ITH2-0.3+7 V EN,RST,DET,GATE Voltage V EN, V RST, V DET, V GATE -0.3+7 V 2 Pd1 0.34* W 3 Pd2 0.69 * W Power Dissipation 4 Pd3 2.20 * W 5 Pd4 3.56* W Operating Temperature Range Topr -40 +85 Storage Temperature Range Tstg -55 +150 Maximum Junction Temperature Tjmax +150 1 Pd should not be exceeded. 2 IC only 2 3 1-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm 2 2 4 4-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm , in 1,4 layer, 5505mm in 2,3 layer 2 5 4-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 5505mm , in each layers Operating Conditions (Ta=-40+85) Parameter Symbol Min. Typ. Max. Unit Vcc Voltage VCC 4.5 5.0 5.5 V EN Voltage VEN 0 - 5.5 V VOUT1 1.8 - 3.3 V Output Voltage range VOUT2 0.8 - 2.5 V VOUT3 0.8 - 2.5 V 6 ISW1 - - 1.5* A SW Average Output Current 6 ISW2 - - 1.5* A 6 Pd should not be exceeded. www.rohm.com 2009.08 - Rev.A 1/18 2009 ROHM Co., Ltd. All rights reserved. Technical Note BD9153MUV Electrical Characteristics (Ta=25 VCC=5V, EN=VCC ,unless otherwise specified.) Limit Parameter Symbol Unit Condition Min. Typ. Max. Standby Current ISTB - 0 10 A EN=0V Bias Current ICC - 600 1000 A EN Low Voltage VENL - GND 0.8 V Standby Mode EN High Voltage VENH 2 Vcc - V Active Mode EN Input Current IEN - 2 10 A EN=2V Oscillation Frequency FOSC 0.8 1.0 1.2 MHz RONP1 - 0.17 0.3 Vcc=5V Pch FET ON Resistance RONP2 - 0.17 0.3 Vcc=5V RONN1 - 0.13 0.2 Vcc=5V Nch FET ON Resistance RONN2 - 0.13 0.2 Vcc=5V VFB1,2 0.788 0.8 0.812 V 1.5% FB Reference Voltage VFB3 0.784 0.8 0.816 V 2.0%(Ta=25) VFB3 0.780 0.8 0.820 V 2.5%(Ta=-40~+85) ITH sink curren1 ITHSI1 10 18 - A VFB1=1.0V ITH source current 1 ITHSO1 10 18 - A VFB1=0.6V ITH sink curren2 ITHSI2 10 18 - A VFB2=1.0V ITH source current 2 ITHSO2 10 18 - A VFB2=0.6V UVLO Threshold Voltage1 VUVLOL1 3.6 3.8 4.0 V Vcc=50V UVLO Release Voltage1 VUVLOH1 3.65 3.9 4.2 V Vcc=05V UVLO Threshold Voltage2 VUVLOL2 2.4 2.5 2.6 V Vcc=50V UVLO Release Voltage2 VUVLOH2 2.425 2.55 2.7 V Vcc=05V VS Discharge Resistance RVS - 40 80 Vcc=5V Soft Start Time TSS 0.4 0.8 1.6 ms Timer Latch Time TLATCH 1.0 2.0 4.0 ms SCP/TSD ON VSCP1 - 0.4 0.56 V FB1=0.80V Output Short circuit VSCP2 - 0.4 0.56 V FB2=0.80V Threshold Voltage VSCP3 - 0.4 0.56 V FB3=0.80V RST Release Voltage VRST1 0.691 0.720 0.749 V DET=0V0.8V RST threshold Voltage VRST2 0.668 0.696 0.724 V DET=0.8V0V RST Delay TRST 40 50 60 ms RST ON Reststance RONRST - 140 280 GATE Source Current IGSO 0.5 1.5 - mA VFB3=0.6V , VGATE=2.5V GATE Sink Current IGSI 1.0 5.0 - mA VFB3=1.0V , VGATE=2.5V www.rohm.com 2009.08 - Rev.A 2/18 2009 ROHM Co., Ltd. All rights reserved.