bd9528amuv Diodes, Inc., bd9528amuv Datasheet
bd9528amuv
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bd9528amuv Summary of contents
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... BD9528AMUV ●Description BD9528AMUV is a 2ch switching regulator controller with high output current which can achieve low output voltage (1.0V～ 5.5V) from a wide input voltage range (5.5V～28V). High efficiency for the switching regulator can be realized by utilizing an external N-MOSFET power transistor. A new technology called H a Rohm proprietary control method to realize ultra high transient response against load change ...
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... BD9528AMUV ●Maximum Absolute Ratings (Ta=25℃) Parameter Terminal Voltage Power Dissipation1 Power Dissipation2 Power Dissipation3 Power Dissipation4 Operating temperature Range Storage temperature Range Junction Temperature *1 Do not however exceed Pd. *2 Instantaneous surge voltage, back electromotive force and voltage under less than 10% duty cycle. ...
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... BD9528AMUV ●ELECTRICAL CHARACTERISTICS (Unless otherwise noted, Ta=25℃ VIN=12V, CTL=OPEN, EN1=EN2=5V, FS1=FS2=51kΩ) Parameter VIN standby current VIN bias current VIN shut down mode current CTL Low Voltage CTL High Voltage CTL bias current EN Low Voltage EN High Voltage EN bias current [5V linear regulator](VIN) ...
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... BD9528AMUV ●ELECTRICAL CHARACTERISTICS (unless otherwise noted, Ta=25℃ VIN=12V, CTL=OPEN, EN1=EN2=5V, FS1=FS2=51kΩ) Parameter 3 [H REG block] Ontime1 Ontime2 Maximum On time 1 Maximum On time 2 Minimum Off time [FET driver block] HG higher side ON resistor HG lower side ON resistor LG higher side ON resistor LG lower side ON resistor [Over voltage protection block] ...
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... BD9528AMUV ●Output condition table Input CTL EN1 Low Low Low Low Low High Low High High Low High Low High High High High ※ CTL pin is connected to VIN pin with 1MΩ resistor(pull up) internal IC. ※ EN pin is connected to AGND pin with 1MΩ resistor(pull down) internal IC. ...
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... BD9528AMUV ●Pin Configuration PGND1 25 LG1 26 Vo1 27 REG2 28 FIN REG1 29 VIN 30 LG2 31 PGND2 ●Pin Function Table PIN No. PIN name 1 SW2 2 HG2 3 BOOT2 4 EN2 5 PGOOD2 6 SS2 7 Vo2 8 ILIM2 9 CTL 10 FS2 11 FB2 12 REF 13 AGND 14 FB1 15 FS1 16 MCTL2 17 ILIM1 ...
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... BD9528AMUV ●Reference data HG 10V/div SW 10V/div LG 5V/div 2μs Fig.1 Switching Waveform (Vo=5V, Io=0A, PWM) HG 10V/div SW 10V/div LG 5V/div 10μs Fig.4 Switching Waveform (Vo=5V, Io=0A, SLLM) HG 10V/div SW 10V/div LG 5V/div 10μs Fig.7 Switching Waveform (Vo=3.3V, Io=0A, QLLM) HG 10V/div SW 10V/div LG 5V/div 2μs Fig.10 Switching Waveform (Vo=1V, Io=8A, PWM) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. ...
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... BD9528AMUV ●Reference data 100 12V 40 21V 100 1000 10000 Io[mA] Fig.13 Efficiency (Vo=5V, PWM) 100 12V 60 21V 100 1000 10000 Io[mA] Fig.16 Efficiency (Vo=3.3V, PWM) 100 12V 40 21V 100 1000 10000 Io[mA] Fig.19 Efficiency (Vo=1V, PWM) 20μs Vo 100mV/div ...
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... BD9528AMUV ●Reference data 20μs Vo 100mV/div I L 5A/div I O 5A/div Fig.25 Transient Response (Vo=3.3V, PWM, Io=8→0A) Vo 50mV/div 2μs Fig.28 Output Voltage (Vo=5V, PWM, Io=0A) Vo 50mV/div 2μs Fig.31 Output Voltage (Vo=5V, SLLM, Io=0A) Vo 50mV/div 10μs Fig.34 Output Voltage (Vo=3.3V, QLLM, Io=0A) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 20μs ...
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... BD9528AMUV ●Reference data Vo 50mV/div 2μs Fig.37 Output Voltage (Vo=1V, PWM, Io=8A) EN1 5V/div Vo1 2V/div EN2 5V/div Vo2 2V/div Fig.40 Wake up waveform (EN1=EN2) EN1 5V/div PGOOD1 2V/div EN2 5V/div PGOOD2 2V/div Fig.43 Wake up waveform (EN1/2→PGOOD1/2) 2.5 VOUT=5V 2 VOUT=3.3V 1 100 150 RFS [kΩ] Fig ...
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... BD9528AMUV ●Reference data 3.500 3.000 VIN=7.5V(-5℃） 2.500 VIN=21V（-5℃） VIN=7.5V(75℃） VIN=21V（75℃） 2.000 1.500 1.000 0.500 0.000 IOUT [A] Fig.49 Ta-I OCP (Vo=3.3V) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. IOUT - REG1 voltage 5 ...
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... Descriptions ・VIN (30 pin) This is the main power supply pin. The input supply voltage range is 5.5V to 28V. The duty cycle of BD9528AMUV is determined by input voltage and control output voltage. Therefore, when VIN voltage fluctuated, the output voltage also becomes unstable. Since VIN line is also the input voltage of switching regulator, stability depends on the impedance of the voltage supply recommended to establish bypass capacitor and CR filter suitable for the actual application. ・ ...
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... BD9528AMUV ●Explanation of Operation The BD9528AMUV is a 2ch synchronous buck regulator controller incorporating ROHM’s proprietary H control system. Because controlling of output voltage by a comparator, high response is realized with not relying on the switching frequency. And, when VOUT drops due to a rapid load change, the system quickly restores VOUT by extending the TON time interval. Thus, it serves to improve the regulator’ ...
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... In case FB doesn’t fall in the programmed time, the status forcedly and VOUT falls result, he status of next HG is ON. Running The BD9528AMUV operates in PWM mode until SS pin reaches cramp voltage (2.5V), regardless of the control SLLM PWM mode setting, in order to operate stable during the ...
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... BD9528AMUV Notes when waking up with CTL pin or VIN pin If EN pin is High or short (or pull up resistor) to REG1 pin, IC starts up by switching CTL pin, the IC might fail to start up (SCP function) with the reason below, please be careful of SS pin and REF pin capacitor capacity. ...
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... BD9528AMUV ●Output Discharge VIN,CTL EN VOUT VIN, CTL REG1 VOUT The efficiency of VIN voltage drop Output Discharge Output Hi-Z UVLO ON www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. It will be available to use if connecting VOUT pin to DC/DC output. (Total about 100Ω) . Discharge function operates when ①EN=’L’ ...
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... BD9528AMUV ・Timer Latch Type Short Circuit Protection FB REF×0.7 0.75ms(typ) SCP EN / UVLO ・Over Voltage Protection REF×1 Switching ・Over current protection circuit www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Short protection kicks in when output falls to or below REF X 0 ...
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... BD9528AMUV ●External Component Selection 1. Inductor (L) selection ⊿ IL VIN IL VOUT L Co Output ripple current ※Passing a current larger than the inductor’s rated current will cause magnetic saturation in the inductor and decrease system efficiency. In selecting the inductor, be sure to allow enough margin to assure that peak current does not exceed the inductor rated current value. ※ ...
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... BD9528AMUV 4. MOSFET Selection VIN main switch VOUT L Co synchronous switch 5. Setting output voltage This IC is operated that output voltage is REF≒FB. And it is operated that output voltage is feed back to FB pin. <Output Voltage> (R1+R2 ×REF(0.7V)+ OUT R2 =⊿I ⊿V ×ESR OUT L V OUT ...
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... Relation between output voltage and T The BD9528AMUV, both 1ch and 2ch, are high efficiency synchronous regulator controller with frequency variable. T time varies with Input voltage [VIN], output voltage [VOUT], and RFS of FS pin resistance. ...
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... BD9528AMUV 8. Relation between output voltage and frequency Because the BD9528AMUV is T MOSFET and output capacitor will increase, and frequency will be fast. Loss of each Coil, MOSFET and output capacitor are below. 2 ① Coil loss = IOUT ② MOSFET(High Side) loss = IOUT ③ MOSFET(Low Side) loss = IOUT ...
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... BD9528AMUV ●I/O Equivalent Circuit 1, 24pin (SW2, SW1) BOOT HG 4, 21pin (EN2, EN1) 12pin (REF) REG1 16, 18pin (MCTL2, MCTL 1) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 2, 23pin (HG2, HG1) BOOT BOOT SW 5, 20pin (PGOOD2, PGOOD1) 11, 14pin (FB2, FB1) 9pin (CTL) VIN ...
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... BD9528AMUV ●I/O Equivalent Circuit 7, 27pin (Vo2, Vo1) 30pin (VIN) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 28pin (REG2) REG1 8, 17pin (ILIM2, ILIM1) 23/29 Technical Note 29pin (REG1) VIN VIN 2011.11 - Rev.A ...
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... GRM1882C1H102JA01 1000pF GRM1882C1H102JA01 (Diode) (RSX501L-20) (Diode) (RSX501L-20) 2.2uH FDVE1040-2R2M 2.2uH FDVE1040-2R2M FET RMW130N03 FET RMW130N03 FET RMW130N03 FET RMW130N03 - BD9528AMUV 2011.11 - Rev.A MURATA MURATA MURATA MURATA MURATA MURATA MURATA SANYO SANYO MURATA MURATA (ROHM) (ROHM) TOKO TOKO ROHM ROHM ROHM ROHM ...
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... If using only 1ch DC/DC and 2ch pin is set to be off at all times, please manage the unused pin as diagram below. PIN No, PIN name 1 SW2 2 HG2 3 BOOT2 4 EN2 5 PGOOD2 6 SS2 7 Vo2 8 ILIM2 10 FS2 11 FB2 31 LG2 VIN BD9528AMUV 12V R1 30 VIN VIN CTL C1 CTL 9 CTL REG1 EN1 EN1 21 EN1 4 EN2 REG1 29 REG1 5V C2 REG2 3.3V 28 ...
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... BD9528AMUV ●Example of PCB layout H-FET (CH1) VIN H-FET (CH2) ① Because high pulse current rush into power loop, consisted of input capacitor Cin, output inductor L and output capacitor Co, this part layout should be built at parts side (upper side) including GND pattern. Also, drawing via formation in power loop line should be avoided. ...
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... BD9528AMUV ●Operation Notes and Precautions 1. This integrated circuit is a monolithic IC, which (as shown in the figure below), has P between the various pins. A P-N junction is formed from this P layer and N layer of each pin, with the type of junction depending on the relation between each potential, as follows: ・When GND＞ element A＞ element B, the P-N junction is a diode. ...
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... BD9528AMUV 9. Capacitor between output and GND When a larger capacitor is connected between the output and GND, Vcc or VIN shorted with the GND or 0V line – for any reason – may cause the charged capacitor current to flow to the output, possibly destroying the IC. Do not connect a capacitor larger than 1000uF between the output and GND ...
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... BD9528AMUV ●Ordering Part Number VQFN032V5050 5.0±0.1 1PIN MARK 0.08 S 3.4±0.1 C0 0.75 +0.05 0.5 0.25 -0.04 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved Package MUV : VQFN032V5050 <Tape and Reel information> Tape Embossed carrier tape Quantity 2500pcs E2 Direction The direction is the 1pin of product is at the upper left when you hold ...
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