BD9528MUV ROHM [Rohm], BD9528MUV Datasheet
BD9528MUV
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BD9528MUV Summary of contents
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... BD9528MUV ●Description BD9528MUV 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 H3RegTM(High speed, High efficiency, High performance Rohm proprietary control method to realize ultra high transient response against load change ...
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... BD9528MUV ●Absolute maximum 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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... BD9528MUV ●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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... BD9528MUV ●Electrical characteristics – Continued (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 ...
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... BD9528MUV ●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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... BD9528MUV ●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 Highside FET source pin 2 2 HG2 Highside FET gate drive pin 2 3 BOOT2 HG Driver power supply pin 2 ...
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... BD9528MUV ●Electrical characteristic curves (Reference data) HG 10V/div SW 10V/div LG 5V/div 2us Fig.1 Switching Waveform (Vo=5V, PWM, Io=0A) HG 10V/div SW 10V/div LG 5V/div 10us Fig.4 Switching Waveform (Vo=5V, SLLM, Io=0A) HG 10V/div SW 10V/div LG 5V/div 10us Fig.7 Switching Waveform (Vo=3.3V, QLLM, Io=0A) HG 10V/div SW 10V/div LG 2us 5V/div Fig.10 Switching Waveform (Vo=1V, PWM, Io=8A) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD9528MUV ●Electrical characteristic curves (Reference data) – Continued 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 80 7V 12V 60 21V 100 1000 10000 Io[mA] Fig ...
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... BD9528MUV ●Electrical characteristic curves (Reference data) – Continued 20us Vo 100mV/div IL 5A/div Io 5A/div Fig.25 Transient Response (Vo=3.3V, PWM, Io=8→0A) Vo 50mV/div 2us Fig.28 Output Voltage (Vo=5V, PWM, Io=0A) Vo 50mV/div 2us Fig.31 Output Voltage (Vo=5V, SLLM, Io=0A) Vo 50mV/div 10us Fig.34 Output Voltage (Vo=3.3V, QLLM, Io=0A) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD9528MUV ●Electrical characteristic curves (Reference data) – Continued Vo 50mV/div 2us 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.43Wake up waveform (EN1/2→PGOOD1/2) 2.5 VOUT=5V 2 VOUT=3.3V 1 ...
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... BD9528MUV ●Electrical characteristic curves (Reference data) – Continued 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 © 2010 ROHM Co., Ltd. All rights reserved. ...
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... Descriptions ・VIN (30 pin) This is the main power supply pin. The input supply voltage range is 5.5V to 25V. The duty cycle of BD9528MUV 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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... BD9528MUV ・BOOT1, 2 (22 pin, 3 pin) This is the power supply pin for high side FET driver. The maximum voltage range to GND pin is to 35V pin is to 7V. In switching operations, the voltage swings from (VIN+REG1) to REG1 by BOOT pin operation. ・HG1, 2 (23 pin, 2 pin) This is the highside FET gate drive pin ...
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... BD9528MUV ●Explanation of Operation The BD9528MUV 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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... ON. 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 BD9528MUV operates in PWM mode until SS pin reaches cramp voltage (2.5V), regardless of the control PWM mode setting, in order to operate stable during the PWM operation ...
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... BD9528MUV 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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... BD9528MUV ●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 © 2010 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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... BD9528MUV ・Timer Latch Type Short Circuit Protection FB REF×0.7 1ms(typ) SCP EN / UVLO ・Over Voltage Protection REF×1 Switching ・Over current protection circuit www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Short protection kicks in when output falls to or below REF X 0 ...
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... BD9528MUV ● External Component Selection 1. Inductor (L) selection Δ OUT 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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... BD9528MUV 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) V REF(0.7V) OUT R2 ...
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... FET ON resistor dispersion, Coil inductor dispersion, IC over current reference value dispersion, frequency dispersion. 7. Relation between output voltage and T The BD9528MUV, 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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... BD9528MUV 8. Relation between output voltage and frequency Because the BD9528MUV 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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... BD9528MUV ●I/O Equivalent Circuit 1, 24pin (SW2, SW1) BOOT HG 4, 21pin (EN2, EN1) 12pin (REF) REG1 16, 18pin (MCTL2, MCTL1) www.rohm.com © 2010 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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... BD9528MUV ●I/O Equivalent Circuit 7, 27pin (Vo2, Vo1) 30pin (VIN) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 28pin (REG2) REG1 8, 17pin (ILIM2, ILIM1) 24/33 Technical Note 29pin (REG1) VIN VIN 2010.03 - Rev.A ...
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... Diode RSX501L-20 Diode RSX501L-20 2.5uH CDEP105NP-2R5MC-32 2.5uH CDEP105NP-2R5MC-32 FET uPA2709 FET uPA2709 FET uPA2709 FET uPA2709 - BD9528MUV 2010.03 - Rev.A COMPANY MURATA MURATA KYOCERA - KYOCERA - SANYO - - - - SANYO - - - - - - - - ROHM ROHM Sumida Sumida NEC NEC NEC NEC ...
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... Diode RSX501L-20 Diode RSX501L-20 2.5uH CDEP105NP-2R5MC-32 2.5uH CDEP105NP-2R5MC-32 FET uPA2709 FET uPA2709 FET uPA2709 FET uPA2709 - BD9528MUV 2010.03 - Rev.A COMPANY MURATA MURATA KYOCERA - KYOCERA - SANYO - - - - SANYO - - - - - - - - ROHM ROHM Sumida Sumida NEC NEC NEC NEC 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 ILIM1 10 FB2 11 FS2 31 LG2 VIN BD9528MUV 12V R1 30 VIN CTL VIN C1 R2 CTL 9 CTL REG1 EN1 EN1 R3 21 EN1 4 EN2 REG1 29 REG1 5V C2 REG2 3 ...
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... BD9528MUV ●Example of PCB layout ③ (CH1) H-FET H-FET (CH2) ③ ①Because 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, including GND pattern, at parts side (upper side). Also ,please avoid to draw via formation in power loop line. (The reason is that it will be a factor of noise because via oneself holds some nH parasitic inductance) ② ...
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... BD9528MUV Input current A Vin Power GND GND Analog GND Output current GND Current leveled By capacitor t Input current A Vin pin voltage www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. DC/DC H3Reg controller Output current GND This part is shortened. Vin Charger current Cin ...
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... BD9528MUV The influence of inductor is noted SW The impedance of FB pin is higher www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. The impedance of the output is low = It may be long L FB The impedance of this line is high 30/33 Technical Note Vout Cout This distance is shorted as much as possible 2010.03 - Rev.A ...
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... BD9528MUV ●Notes for use 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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... BD9528MUV 8. Thermal shutdown circuit This IC is provided with a built-in thermal shutdown (TSD) circuit, which is activated when the operating temperature reaches 175℃ (standard value), and has a hysteresis range of -15℃ (standard value). When the IC chip temperature rises to the threshold, all the inputs automatically turn OFF. Note that the TSD circuit is provided for the exclusive purpose shutting down the IC in the presence of extreme heat, and is not designed to protect the IC per se or guarantee performance when or after extreme heat conditions occur ...
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... BD9528MUV ●Ordering part number Part No. Part No. VQFN032V5050 5.0±0.1 1PIN MARK S 0.08 S 3.4±0.1 C0 0.75 +0.05 0.25 0.5 -0.04 (Unit : mm) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved Package MUV: VQFN032V5050 <Tape and Reel information> Tape Embossed carrier tape Quantity ...
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