Regulators ICs for Digital Cameras and Camcorders System Switching Regulator IC with Built-in FET (5V) No.11036EAT15 BD9355MWV Description 7 Channel Switching Regulator Controller for Digital Camera that contains an internal FET. Built in the function that dim a white LED for back light with a diming set signal from a microcomputer. Features 1) 1.5V minimum input operating 2) Supplies power for the internal circuit by step-up converter(CH1). 3) CH1step-up converter, CH2 cross converter, CH3,4 step-down converter, CH5 inverting converter for CCD, CH6 boost converter for CCD, CH7 boost converter for LED 4) All channels contain internal Power MOSFET and compensation. Built-In Over Voltage Protection (OVP) for CH1,2,7 5) Operating frequency 2.0MHz(CH3,4), 1MHz(CH1,2,57) 6) Contains sequence control circuit for CH14. It is possible to select sequence CH1CH3CH4CH2 and CH1CH4CH3CH2 by SEQ CTL pin 7) Built-In discharge switch (CH2,3,4) and contains off sequence control circuit for CH14. CH1,3 turn off after CH2,4 output voltage discharged. 8) Built-In Short-circuit Protection (SCP) 9) CH1 have backgate control circuit CH6 have high side switches with soft start function. 10) Thermally enhanced UQFN036V5050 package(5mm 0.4mm pitch) Applications For Digital Camera Absolute maximum ratings (Ta=25) Parameter Symbol Ratings Unit Maximum applied power HX2BAT,VCCOUT -0.37 V Supply voltage VHx14, 56 -0.37 V ( Hx56 - Lx5) Voltage -0.315 V Maximum applied input voltage VLx6 -0.322 V VLx7 -0.330 V IomaxHx1, Lx1 2.2 A IomaxHx2 1.5 A IomaxHx3 1.2 A Maximum Output current IomaxHx4 1.0 A IomaxHx56 1.5 A IomaxHS6L +1.2 A IomaxLx7,8 1.0 A Power Dissipation Pd 0.88 (*1) W Operating Temperature Topr -25+85 Storage Temperature Tstg -55+150 Maximum applied power HX2BAT,VCCOUT +150 Supply voltage *1 Should be derated by 7.04mW/ at Ta=25 or more. When mounted on a glass epoxy PCB of 74.2mm74.2 mm1.6 mm www.rohm.com 2011.03 - Rev.A 1/22 2011 ROHM Co., Ltd. All rights reserved. Technical Note BD9355MWV Operating condition Ratings Parameter Symbol Unit Conditions Min. Typ. Max. Power supply voltage VBAT 1.5 - 5.5 V VREF terminal connection capacity CVREF 0.047 0.1 0.47 F PWM7 input frequency range fpwm 20 - 100 kHz Driver CH1 NMOS/PMOS drain current Idpl1 2.1 A CH2 Hx2BAT input current Iin2 1.4 A CH3 PMOS drain current Idpl3 1.0 A CH4 PMOS drain current Idpl4 0.5 A CH5 PMOS drain current Idpl5 1.4 A CH6 HS6L input current Idpl6 1.1 A CH6,7 NMOS drain current Idnl6,7 0.9 A Output voltage setting range CH1 4.5 5.4 V CH2 () 5.4 V Use with the following range. CH3 1.0 4.4 V CH4 1.0 4.4 V CH5 -9.5 -1.5 V CH6 5.5 16 V Use with VBAT<Vo6 CH7 5.5 26 V Use with VBAT<Vo7 CH2 output voltage setting range maximum input voltage - CH2 output voltage setting range 6.0 5.4V 5.0 Output voltage setting range 4.0 3.0V 3.0 2.0 1.75V 1.0 minimum setting value = (maximum input voltage + 0.5V)0.5 0.0 2.02.53.03.54.04.55.05.5 6.0 maximum input voltage V Fig.1 CH2 output voltage setting range Ripple voltage level of CH2 cross converter would be big by cross talk with embedded oscillator when oscillating Duty of step down side is 50 %. Therefore please not to set oscillating duty of CH2 with 50%. www.rohm.com 2011.03 - Rev.A 2/22 2011 ROHM Co., Ltd. All rights reserved. output voltage setting V