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.10027ECT13 BD9150MUV Description ROHMs high efficiency dual step-down switching regulator BD9150MUV is a 2ch output power supply designed to produce a low voltage including 3.3,1.2 volts from 5.0 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. 2) Offers highly efficiency for all load range with synchronous rectifier (Pch/Nch FET) TM and SLLM (Simple Light Load Mode) 3) 2ch output power supply. 4) Each of EN controls 2ch output. 5) Incorporates soft-start function. 6) Incorporates ULVO functions. 7) Incorporates thermal protection and short-current protection circuit with time delay function. 8) Incorporates shutdown function Icc=0A(Typ.) 9) Output current max 1.5A/1.5A. 10) Employs small surface mount package : VQFN020V4040 Use Power supply for LSI including DSP, Micro computer and ASIC Absolute Maximum Rating (Ta=25) Parameter Symbol Limit Unit 1 Vcc Voltage VCC -0.3+7 * V V -0.3+7 V EN1 EN Voltage V -0.3+7 V EN2 V -0.3+7 V SW1 SW Voltage V -0.3+7 V SW2 2 Pd1 0.34* W 3 Pd2 0.70 * W Power Dissipation 4 Pd3 1.21 * W 5 Pd4 3.56* W Operating Temperature Range Topr -40+85 Storage Temperature Range Tstg -55+150 Maximum Junction 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 *4 4-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm , in each layers 2 *5 4-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 5505mm , in each layers www.rohm.com 2010.04 - Rev.C 1/16 c 2010 ROHM Co., Ltd. All rights reserved. Technical Note BD9150MUV Operating Conditions (Ta=-40+85) Limit Parameter Symbol Unit Typ. Min. Max. Vcc Voltage VCC 4.75 5.0 5.5 V 5.5 VEN1 0 - V EN Voltage 5.5 VEN2 0 - V Output Voltage range VOUT2 0.8 - 2.5 V 6 ISW1 - - 1.5* A SW Average Output Current 6 ISW2 - - 1.5* A *6 Pd and ASO should not be exceeded. Electrical Characteristics (Ta=25 AVCC=PVCC=5.0V, EN1=EN2=AVCC ,unless otherwise specified.) Limit Parameter Symbol Unit Condition Typ. Min. Max. Standby Current ISTB - 0 10 A EN1=EN2=0V Bias Current ICC - 500 800 A EN Low Voltage VENL - GND 0.8 V Standby Mode EN High Voltage VENH 2.0 Vcc - V Active Mode EN Input Current IEN - 1 10 A VEN1=VEN2=2V Oscillation Frequency FOSC 1.2 1.5 1.8 MHz 0.3 RONP1 - 0.17 Vcc=5V Pch FET ON Resistance 0.3 RONP2 - 0.17 Vcc=5V 0.2 RONN1 - 0.13 Vcc=5V Nch FET ON Resistance 0.2 RONN2 - 0.13 Vcc=5V V FB1 3.25 3.3 3.35 1.5% FB Reference Voltage V FB2 0.788 0.8 0.812 1.5% UVLO Threshold Voltage VUVLO1 3.6 3.8 4.0 V VCC=50V UVLO Release Voltage VUVLO2 3.65 3.9 4.2 V VCC=05V Soft Start Time TSS 0.4 0.8 1.6 ms Timer Latch Time TLATCH 0.68 1.36 2.72 ms SCP/TSD ON SCP1 - 1.65 2.4 V FB1=3.30V V Output Short circuit Threshold Voltage VSCP2 - 0.4 0.56 V FB2=0.80V www.rohm.com 2010.04 - Rev.C 2/16 c 2010 ROHM Co., Ltd. All rights reserved.