BD9328EFJ-BZE2 ROHM

Single-chip Type with Built-in FET Switching Regulators Simple Step-down Switching Regulator with Built-in Power MOSFET No.11027EAT55 BD9328EFJ Description The BD9328EFJ is a synchronous step-down switching regulator that integrates 2 low resistance N-channel MOSFETs. It achieves 2A continuous output current over a wide input supply range. Current mode operation provides fast transient response and easy phase compensation. Features 1) Wide operating INPUT Range 4.2V18.0V 2) 2A Output Current 3) Hi-side / Lo-side FET ON-resistance 0.15 / 0.13 Power Switch 4) Low ESR Output Ceramic Capacitors are Available 5) Low Standby Current during Shutdown Mode 6) 380 kHz Fixed Operating Frequency 7) Feedback voltage 0.9V 1.5% Accuracy at room temp. (2.0% guaranteed for -25 to 85 temperature range) 8) Protection Circuits Under Voltage Lockout Protection Thermal Shutdown Over Current Protection 9) HTSOP-J8 Package with Exposed thermal PAD. Applications Distributed Power System Pre-Regulator for Linear Regulator Absolute maximum ratings (Ta = 25) Parameter Symbol Ratings Unit Supply Voltage V 20 V IN Switch Voltage VSW 20 V *1 Power Dissipation for HTSOP-J8 Pd 3760 mW *2 Package thermal resistance ja ja 29.27 /W *2 Package thermal resistance jc jc 3.75 /W Operating Temperature Range Topr -40+85 Storage Temperature Range Tstg -55+150 Junction Temperature Tjmax 150 BST Voltage VBST VSW+7 V EN Voltage VEN 20 V All other pins VOTH 20 V *1 Derating in done 30.08 mW/ for operating above Ta25(Mount on 4-layer 70.0mm70.0mm1.6mm board) *2 Mount on 4-layer 50mm x 30mm x 1.6mm application board www.rohm.com 2011.02 - Rev.A 1/15 2011 ROHM Co., Ltd. All rights reserved. Technical Note BD9328EFJ Operation Range (Ta= -4085) Ratings Parameter Symbol Unit Min Typ Max Supply Voltage VIN 4.2 12 18 V SW Voltage VSW -0.5 - 18 V Output current ISW3 - - 2 A Output voltage range V 0.9 - VIN x 0.7 V RANGE Electrical characteristics (Unless otherwise specified VIN=12V Ta=25) Limits Parameter Symbol Unit Conditions Min Typ Max Error amplifier block FB input bias current IFB - 0.02 2 A Feedback voltage1 VFB1 0.886 0.900 0.914 V Voltage follower Feedback voltage2 VFB2 0.882 0.900 0.918 V Ta=-2585 SW block SW Hi-side FET On-resistance RONH - 0.15 - ISW= -0.8A Lo-side FET On-resistance RONL - 0.13 - ISW= 0.8A VIN= 18V, Hi/Lo-side FET Leak current ILEAKN - 0 10 A VSW = 0V / 18V Switch Current Limit ILIMIT3 3 - - A Maximum duty cycle MDUTY - 90 - % VFB= 0V General Enable Sink current IEN 90 180 270 A VEN= 12V Enable Threshold voltage VEN 1.0 1.2 1.4 V Under Voltage Lockout threshold VUVLO 3.5 3.75 4.0 V VIN rising Under Voltage Lockout Hysteresis VHYS - 0.3 - V Soft Start Current ISS 5 10 15 A VSS= 0 V Soft Start Time TSS - 22 - ms CSS= 0.1 F Operating Frequency FOSC 300 380 460 kHz Circuit Current ICC - 1.2 3 mA VFB= 1.5V, VEN= 12V Quiescent Current IQUI - 15 27 A VEN= 0V www.rohm.com 2011.02 - Rev.A 2/15 2011 ROHM Co., Ltd. All rights reserved.