TECHNICAL NOTE Large Current External FET Controller Type Switching Regulator Step-down, High-efficiency Switching Regulators (Controller type) BD9011EKN , BD9011KV , BD9775FV BD9011EKN, BD9011KV Overview The BD9011EKN/KV is a 2-ch synchronous controller with rectification switching for enhanced power management efficiency. It supports a wide input range, enabling low power consumption ecodesign for an array of electronics. Features 1) Wide input voltage range: 3.9V to 30V 2) Precision voltage references: 0.8V1% 3) FET direct drive 4) Rectification switching for increased efficiency 5) Variable frequency: 250k to 550kHz (external synchronization to 550kHz) 6) Built-in selected OFF latch and auto remove over current protection 7) Built-in independent power up/power down sequencing control 8) Make various application , step-down , step-up and step-up-down 9) Small footprint packages: HQFN36V, VQFP48C Applications Car audio and navigation systems, CRTTVLCDTVPDPTVSTBDVDand PC systemsportable CD and DVD players, etc. Absolute Maximum Ratings (Ta=25) Parameter Symbol Parameter Symbol Rating Unit Rating Unit *1 EXTVCC Voltage EXTVCC 34 V COMP1,2 Voltage COMP1,2 *1 VREG5 V VCCCL1,2 Voltage VCCCL1,2 34 V DET1,2 Voltage DET1,2 CL1,2 Voltage CL1,2 34 V RTSYNC Voltage RTSYNC *1 *2 SW1,2 Voltage SW1,2 34 V 0.875 W *1 HQFN36V BOOT1,2 Voltage BOOT1,2 40 V Power Dissipation Pd BOOT1,2-SW1,2 *1 *2 BOOT1,2-SW1,2 7 V 1.1 Voltage W VQFP48C STB, EN1,2 Voltage STB, EN1,2 VCC V Operating VREG5,5A 7 V Topr VREG5,5A -40 to +105 temperature VREG33 VREG33 VREG5V Storage temperature Tstg -55 to +150 SS1,2FB1,2 V Junction temperature Tj +150 SS1,2FB1,2 VREG5 *1 Regardless of the listed rating, do not exceed Pd in any circumstances. *2 Mounted on a 70mm x 70mm x 0.8mm glass-epoxy board. De-rated at 7.44mW/HQFN36V or 8.8mW/VQFP48C above 25. Sep. 2008 Operating conditions (Ta=25) Parameter Symbol Min. Typ. Max. Unit *1 *2 Input voltage 1 EXTVCC 3.9 12 30 V *1 *2 Input voltage 2 VCC 3.9 12 30 V BOOTSW voltage BOOTSW 4.5 5 VREG5 V Carrier frequency OSC 250 300 550 kHz Synchronous frequency SYNC OSC - 550 kHz Synchronous pulse duty Duty 40 50 60 Min OFF pulse TMIN - 100 - nsec This product is not designed to provide resistance against radiation. *1 After more than 4.5V, voltage range. *2 In case of using less than 6V, Short to VCC, EXTVCC and VREG5. Electrical characteristics (Unless otherwise specified, Ta=25 VCC=12V STB=5V EN1,2=5V) Limit Parameter Symbol Unit Conditions Min. Typ. Max. VIN bias current IIN - 5 10 mA Shutdown mode current IST - 0 10 A VSTB=0V Error Amp Block Feedback reference voltage VOB 0.792 0.800 0.808 V Feedback reference voltage VOB+ 0.784 0.800 0.816 V Ta=-40 to 105 (Ta=-40 to 105) Open circuit voltage gain Averr - 46 - dB VO input bias current IVo+ - - 1 A FET Driver Block HG high side ON resistance HGhon - 1.5 - HG low side ON resistance HGlon - 1.0 - LG high side ON resistance LGhon - 1.5 - LG low side ON resistance LGlon - 0.5 - Oscillator Carrier frequency FOSC 270 300 330 kHz RT=100 k Synchronous frequency Fsync - 500 - kHz RT=100 k,SYNC=500kHz Over Current Protection Block CL threshold voltage Vswth 70 90 110 V CL threshold voltage Vswth+ 67 90 113 V Ta=-40 to 105 Ta=-40 to 105 VREG Block VREG5 output voltage VREG5 4.8 5 5.2 V IREF=6mA VREG33 reference voltage VREG33 3.0 3.3 3.6 V IREG=6mA VREG5 threshold voltage VREG UVLO 2.6 2.8 3.0 V VREG:Sweep down VREG5 hysteresis voltage DVREG UVLO 50 100 200 mV VREG:Sweep up Soft start block Charge current ISS 6.5 10 13.5 A VSS=1V Charge current ISS+ 6 10 14 A VSS=1V,Ta=-40 to 105 (Ta=-40 to 105) Note: Not all shipped products are subject to outgoing inspection. 2/29