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.10027ECT14 BD9152MUV Description ROHMs high efficiency dual step-down switching regulator BD9152MUV 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. 2) Offers highly efficiency for all load range with synchronous rectifier (Pch/Nch FET) TM and SLLM (Simple Light Load Mode) 3) Incorporates soft-start function. 4) Incorporates thermal protection and ULVO functions. 5) Incorporates short-current protection circuit with time delay function. 6) Incorporates shutdown function Icc=0A(Typ.) 7) Employs small surface mount package : VQFN020V4040 Application 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 Temperature Tjmax +150 *1 Pd should not be exceeded. *2 IC only *3 1-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm2 *4 4-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm2 , in each layers *5 4-layer. mounted on a 74.2mm74.2mm1.6mm glass-epoxy board, occupied area by copper foil : 5505mm2, in each layers Operating Conditions (Ta=-40+105) Limit Parameter Symbol Unit Min. Typ. Max. Vcc Voltage VCC 4.5 5.0 5.5 V VEN1 0 - 5.5 V EN Voltage VEN2 0 - 5.5 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. www.rohm.com 2010.04 - Rev.C 1/16 c 2010 ROHM Co., Ltd. All rights reserved. Technical Note BD9152MUV Electrical Characteristics (Ta=25 VCC=5V, EN1=EN2=VCC ,unless otherwise specified.) Limit Parameter Symbol Unit Condition Min. Typ. 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 Vcc - V Active Mode EN Input Current IEN - 1 10 A EN1=EN2=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 FB1 3.25 3.3 3.35 V 1.5% FB Reference Voltage FB2 0.788 0.8 0.812 V 1.5% 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 FB1 Discharge Resistance RFB1 - 20 40 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 - 1.65 2.4 V FB1=3.30V 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.