BD9045FV-E2 ROHM

Large Current External FET Controller Type Switching Regulators Step-down,High-efficiency Switching Regulators (Controller type) No.10028EBT03 BD9040FV,BD9045FV Over View BD9040FV(output type of 1ch) and BD9045FV(output type of 2ch) are switching controllers that can be used within the wide range of the input.Highly effective can be achieved by the synchronous rectification method and it is possible to contribute to the eco-design of all electronic equipment (energy-saving). Feature(BD9040FVBD 9045FV) 1) Wide input voltage range4.5V18V 2) Reference voltage 0.9V1% 3) The overcurrent of timer latch type, excess voltage, short, and RTO/S protection are built-in 4) The switching frequency is changeable.(200kHz750kHz) 5) A ceramic capacitor can be used for the output. Applications For thin television, DVDHDD recorder , STB, amusement and others. Absolute maximum rating (Ta=25) Parameter Symbol Rating Unit Power-supply voltage Vcc 20 V EN input voltage V 20 V EN SW voltage V Vcc V SW Voltage between BOOT-SW V 6 V BOOT Permissible loss 1 Pd1 0.81** (BD9040FV) W Permissible loss 2 Pd2 0.94*** (BD9045FV) W Range of operating temperature Topr -40+85 Storage temperature range Tstg -55+150 Junction temperature Tjmax 150 ** Ta=25 or more is reduced with 6.5mW/. *** Ta=25 or more is reduced with 7.5mW/. Operation condition (Ta=-40+85) Limit Parameter Symbol Unit Min Typ Max Power supply voltage*** Vcc 4.5 12 18 V Timing resistance RT 39 130 k Frequency of oscillator Fosc 200 750 kHz *** Short EN,EN1,EN2 and VREG5 to VCC when the Vcc is less than 5.5V. The radiation design is not done. www.rohm.com 2010.03 - Rev.B 1/18 2010 ROHM Co., Ltd. All rights reserved. Technical Note BD9040FV, BD9045FV Electric characteristics (Unless otherwise specified Ta=25 V =12V EN=5V) (BD9040FV) CC Limit Parameter Symbol Unit Condition Min Typ Max VCC Current of bias ICC - 3 6 mA Standby current ISTB - 430 860 A VEN=0V VREG5 Standard voltage output voltage VREG5 5 5.5 6 V Load stability level VREG5 L - 20 50 mV IVREG5=0 to 6mA VREG3 part Standard voltage VREG3 2.85 3.0 3.15 V Load stability level VREG3 L - 10 20 mV IVREG3=0 to 1mA prevention part for mis-operation of low input VREG5 Threshold voltage VREG5 UVLO 3.4 3.8 4.2 V VREG5:Sweep down VREG3 Threshold voltage VREG3 UVLO 2.4 2.5 2.6 V VREG3:Sweep down Oscillator Oscillation frequency FOSC 240 300 360 kHz RT=91 k Error amplifier VO input bias current Ivo+ - - 1 A Source current Isource -12 -6.5 -2 mA VFB=1.1V Sink current Isink 0.75 1.5 5 mA VFB=0.7V Return standard voltage VOB 0.891 0.900 0.909 V FB-COMP Short Output short detection voltage Vosh 0.37 0.45 0.53 V VFB:Sweep down Hysteresis voltage Vosh 22 45 90 mV VFB:Sweep up Soft start part Charge current ISS -14 -10 -6 A Vss=1V Discharge current 1 IDIS 0.6 1.7 5 mA Vss=1V Discharge current 2 IDIS2 2.35 3.3 4.62 Vss=1V, VEN SS=0V Maximum voltage Vss MAX 1.75 1.95 2.15 V Standby current Vss STB - - 0.3 V overcurrent protection Division CL inflow current Iswin 9 10 11 A VCL=Vcc-0.2V Overvoltage protection Division Detection voltage Vovp 1.06 1.1 1.14 V Timer latch circuit Division Source current ITM -14 -10 -6 A VTM=1V Threshold voltage Vth TM 0.9 1 1.1 V OFF Sink current IOFFS 0.6 1.7 5 mA VTM=0.5V Each ch control part EN pull-up resistor R 150 300 450 k EN EN SS pull-up resistor R 150 300 450 k EN SS www.rohm.com 2010.03 - Rev.B 2/18 2010 ROHM Co., Ltd. All rights reserved.