DataDatasheeteet Coontroller typpe switchingg regulator wwith high freequency, higgh accuracyy external FEET AAutommaticaally CContrrolledd BBuck--Boosst Swwitching Reegulaator BBD9035AEFV-C Geeneral Descripption Keyy Specificatioons The BD90355AEFV-C is a buck-boost swwitching contrroller Input voltagee range: 3.8V to 30VV with a high withstand vooltage and a wide input raange (Initial startup is over 4.5VV) (VIN=3.8~300V) capable oof generating buck-boost ouutput Oscillation frequency: 100kHz to 600kHz with one innductor. The IC has a 7% high accuuracy Reference vvoltage accuraacy: 0.8V1.5%% switching freequency for thhe entire operrating temperaature Circuit curreent at shutdowwn: 0A (Typ..) range (Ta=-440C~+125CC). Because off the automatically Operating teemperature raange: -440 to +125 controlled bbuck-boost sysstem the BD99035AEFV-C also has a higheer efficiency ccompared to regular switcching regulators eemploying Seppic or H-Bridgee systems. Feaatures Pacckage W(Typ.) x D((Typ.) x H(Maxx.) Power suupply voltage: 40V (maximumm rating) HTSSOP-B224 7.80mm x 7.60mm x 1.00mmm Automaticcally controlled buck-boost system. 7% Highh accuracy swwitching frequeency (Ta=-40CC~+125C). PLL circuit for external synchronization: 100kHz~6600kHz Two-stage overcurrent protection through one exteernal resistor Various pprotection funcctions Undervolttage, overvoltage output deetection circuit & constant output monitoor pin (PGOODD) AEC-Q1000 Qualified Appplications Automotivve micro contrroller, car audio and navigattion Figure 1. HTTSSOP-B24 system, LLCD TV, PDP TV, DVD, PC, etc. Typpical Application Circuit Figuree 2. Typical appplication circuuit diagram PProduct structureeSilicon monoolithic integratedd circuit Thiis product is nott designed for protection againsst radioactive raays . wwww.rohm.com TSZ002201-0T1TT0AL00110-1-2 22014 ROHM Coo., Ltd. All rights reserved. 1/23 TSZZ22111140001 19.Feb.2014 Rev.0002DatasheetDatasheet BD9035AEFV-C Pin Configuration (TOP VIEW) GND CLKOUT TEST SYNC VDD RT OUTL SS PGND OVPLVL N.C. FB VL COMP N.C. PGOOD OUTH VREG3 N.C. VREG5 VCC EN CL VCCCL Figure 3. Pin configuration Pin Description Pin No. Symbol Function Pin No. Symbol Function GND Ground pin 13 VCCCL Overcurrent detection setting pin 1 2 TEST Test pin 14 EN Output ON/OFF pin 3 VDD NchFET drive supply pin 15 VREG5 5V internal power supply pin 4 OUTL NchFET drive pin 16 VREG3 3.5V internal power supply pin 5 PGND Power GND pin 17 PGOOD Power good output pin 6 N.C. Not connected 18 COMP Error-amp output pin 7 VL PchFET gate clamp pin 19 FB Feedback pin 8 N.C. Not connected 20 OVPLVLOvervoltage detection setting pin 9 OUTH PchFET drive pin 21 SS Soft start time setting pin 10 N.C. Not connected 22 RT Frequency setting pin External synchronization pulse 11 VCC Power supply pin 23 SYNC input pin 12 CL Overcurrent detection setting pin 2 24 CLKOUT Clock pulse output pin www.rohm.com TSZ02201-0T1T0AL00110-1-2 2014 ROHM Co., Ltd. All rights reserved. 2/23 TSZ2211115001 19.Feb.2014 Rev.002