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BD9011EKN Dataheets PDF



Part Number BD9011EKN
Manufacturers Rohm
Logo Rohm
Description High-efficiency Switching Regulators
Datasheet BD9011EKN DatasheetBD9011EKN Datasheet (PDF)

TECHNICAL NOTE Large Current External FET Controller Type Switching Regulator Step-down, High-efficiency Switching Regulators (Controller type) BD9011EKN , BD9011KV , BD9775FV ■ BD901 1EKN, 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 vol.

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TECHNICAL NOTE Large Current External FET Controller Type Switching Regulator Step-down, High-efficiency Switching Regulators (Controller type) BD9011EKN , BD9011KV , BD9775FV ■ BD901 1EKN, 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: 0.8V±1% 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, CRTTV,LCDTV,PDPTV,STB,DVD,and PC systems,portable CD and DVD players, etc. ●Absolute Maximum Ratings (Ta=25℃) Parameter S EXTVCC Voltage VCCCL1,2 Voltage CL1,2 Voltage SW1,2 Voltage BOOT1,2 Voltage BOOT1,2-SW1,2 Voltage STB, EN1,2 Voltage VREG5,5A VREG33 VREG SS1,2、FB1,2 ymbol EXTVCC VCCCL1,2 CL1,2 SW1,2 BOOT1,2 BOOT1,2-SW1,2 7 STB, EN1,2 VREG5,5A 7 33 SS1,2、FB1,2 Rating 34 34 *1 *1 Unit Parameter S COMP1,2 Voltage ymbol COMP1,2 DET1,2 RT、SYNC Rating Unit V V V V V DET1,2 Voltage RT、SYNC Voltage VREG5 V 34 34 40 *1 *1 0.875 (HQFN36V) Power Dissipation Pd 1.1 (VQFP48C) *2 *2 W *1 V V V W VCC VREG5 VREG5 V V Operating temperature Storage temperature Junction temperature Topr Tstg Tj +150 -40 to +105 -55 to +150 ℃ ℃ ℃ *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 http://www.Datasheet4U.com ●Operating conditions (Ta=25℃) Parameter S Input voltage 1 Input voltage 2 BOOT-SW voltage Carrier frequency Synchronous frequency Synchronous pulse duty Min OFF pulse *1 After more than 4.5V, voltage range. *2 In case of using less than 6V, Short to VCC, EXTVCC and VREG5. ymbol EXTVCC VCC BOOT-SW OSC SYNC Duty TMIN Min. 3.9 *1 *2 Typ. 12 Max. 30 30 VREG5 Unit V V V kHz 3.9 *1 *2 12 4.5 5 250 300 550 OSC 40 50 100 550 60 - kHz % nsec ★This product is not designed to provide resistance against radiation. ●Electrical characteristics (Unless otherwise specified, Ta=25℃ VCC=12V STB=5V EN1,2=5V) Parameter S VIN bias current Shutdown mode current [Error Amp Block] Feedback reference voltage Feedback reference voltage (Ta=-40 to 105℃) Open circuit voltage gain VO input bias current [FET Driver Block] HG high side ON resistance HG low side ON resistance LG high side ON resistance LG low side ON resistance [Oscillator] Carrier frequency Synchronous frequency [Over Current Protection Block] CL threshold voltage CL threshold voltage (Ta=-40 to 105℃) [VREG Block] VREG5 output voltage VREG33 reference voltage VREG5 threshold voltage VREG5 hysteresis voltage [Soft start block] Charge current Charge current (Ta=-40 to 105℃) ISS 6.5 ISS+ 6 10 10 13.5 14 μA μA VSS=1V VSS=1V,Ta=-40 to 105℃ ※ VREG5 VREG33 VREG_UVLO DVREG_UVLO 4.8 3.0 2.6 50 5 3.3 2.8 100 5.2 3.6 3.0 200 V V V mV IREF=6mA IREG=6mA VREG:Sweep down VREG:Sweep up Vswth 70 Vswth+ 67 90 90 110 113 mV mV Ta=-40 to 105℃ ※ FOSC Fsync 270 300 500 330 kHz kHz RT=100 kΩ RT=100 kΩ,SYNC=500kHz HGhon HGlon LGhon LGlon 1.5 1.0 1.5 0.5 Ω Ω Ω Ω VOB 0.792 VOB+ Averr IVo+ 0.784 0.800 0.800 46 0.808 0.816 1 V V dB μA Ta=-40 to 105℃ ※ ymbol IIN IST Limit Min. T yp. 5 0 Max. 10 10 Unit Con mA μA VST B=0V ditions Note: Not all shipped products are subject to outgoing inspection. 2/29 ●Reference data (Unless otherwise specified, Ta=25℃) 100 90 80 EFFICIENCY[%] 70 60 50 40 30 20 10 0 0123 1.8V 1.2V 2.6V 3.3V 5.0V 100 90 3.3V CIRCUIT CURRENT[mA] 80 70 EFFICIENCY[%] 60 50 40 30 20 6 5 5.0V 4 3 2 1 0 105℃ 25℃ -40℃ VIN=12V 10 0 6 9 Io=2A 12 15 18 21 INPUT VOLTAGE : VIN[V] 24 01 OUTPUT CURRENT:Io[A] 0 20 INPUT VOLTAGE:VIN[V] 30 Fig.1 Ef ficiency 1 Fig.2 Ef ficiency 2 Fig.3 Circu it current 0.816 REFERENCE VOLTAGE : VOB[V] : Vswth[mV] 0.812 0.808 0.804 0.800 0.796 0.792 0.788 0.784 -40 -15 10 35 60 85 110 AMBIENT TEMPERATURE : Ta[℃] 110 OSILATIN G FREQUENCY : F OSC[kHz] 330 320 310 300 290 280 270 RT=100kΩ 100 90 80 70 60 -40 -15 10 35 60 85 110 AMBIENT TEMPERATURE : Ta[℃] -40 -15 10 35 60 85 110 AMBIENT TEMPERATURE : Ta[℃] Fig.4 Refer ence voltage vs. temperature characteristics 5.25 5.00 OUT PUT VOLTAGE : Vo[V] Fig.5 O ver current detection vs. temperature characteristics 6 5 OUT PUT VOLTAGE : Vo[V] 3.0 2.5 Fig.6 F requency vs. temperature characteristics 4.75 4.50 4.25 4.00 3.75 3.50 3.25 3.00 -40 -15 10 OUT PUT VOLTAGE : Vo[V] VREG5 5.0V 4 3 RCL=15mΩ 2.0 1.5 3.3V 2 1 0 0 5 10 15 20 INPUT VOLTAGE : VIN[V] 25 LOFF=H 1.0 VRE.


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