background image

R1102

B

www.rohm.com

© 201

6

  ROHM Co., Ltd. All rights reserved.

Notice

ROHM  Customer Support System 

http://www.rohm.com/contact/

Thank you for your accessing to ROHM product informations.  
More detail product informations and catalogs are available, please contact us. 

N o t e s  

The information contained herein is subject to change without notice. 

Before you use our Products, please contact our sales representative

 

and verify the latest specifica-

tions :

Although ROHM is continuously working to improve product reliability and quality, semicon-
ductors can break down and malfunction due to various factors.
Therefore, in order to prevent personal injury or fire arising from failure, please take safety 
measures such as complying with the derating characteristics, implementing redundant and 
fire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have no 
responsibility for any damages arising out of the use of our Poducts beyond the rating specified by 
ROHM.

Examples of application circuits, circuit constants and any other information contained herein are 
provided only to illustrate the standard usage and operations of the Products. The peripheral 
conditions must be taken into account when designing circuits for mass production.

The technical information specified herein is intended only to show the typical functions of and 
examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, 
any license to use or exercise intellectual property or other rights held by ROHM or any other 
parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of 
such technical information.

The Products specified in this document are not designed to be radiation tolerant.

For use of our Products in applications requiring a high degree of reliability (as exemplified  
below), please contact and consult with a ROHM representative : transportation equipment (i.e. 
cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety 
equipment, medical systems, servers, solar cells, and power transmission systems.

Do not use our Products in applications requiring extremely high reliability, such as aerospace 
equipment, nuclear power control systems, and submarine repeaters.

ROHM shall have no responsibility for any damages or injury arising  from non-compliance with 
the recommended usage conditions and specifications contained herein.

ROHM has used reasonable care to ensur

e

 the accuracy of the information contained  in this 

document. However, ROHM does not warrants that such information is error-free, and ROHM 
shall have no responsibility for any damages arising from any inaccuracy or misprint of such 
information.

Please use the Products in accordance with any applicable environmental laws and regulations, 
such as the RoHS Directive. For more details, including RoHS compatibility, please contact a 
ROHM sales office. ROHM shall have  no responsibility for any damages or losses resulting 
non-compliance with any applicable laws or regulations.

When providing our Products and technologies contained in this document to other countries,  
you must abide by the procedures and provisions stipulated in all applicable export laws and 
regulations, including without limitation the US Export Administration Regulations and the Foreign 
Exchange and Foreign Trade Act.

This document, in part or in whole, may not be reprinted or reproduced without prior consent of 
ROHM.

1) 

2)

3)

4)

5)

6)

7)

8)

9)

10)

11)

12)

13)

Содержание BD9B305QUZ-EVK-001

Страница 1: ... Start circuit prevents inrush current during startup and its value can be adjusted by changing the capacitance value for SS pin There are a number of protection circuits present in this IC such as UVLO Under Voltage Lock Out TSD Thermal Shutdown Detection OCP Over Current Protection SCP Short Circuit Protection and OVP Over Voltage Protection and output discharge function which provide higher sys...

Страница 2: ...M Co Ltd No 63UG064E Rev 002 Apr 2022 Figure 3 BD9B305QUZ EVK 001 Schematic EVK Overview Figure 1 BD9B305QUZ EVK 001 Top View Figure 2 BD9B305QUZ EVK 001 Bottom View EVK Schematic VIN 5V VOUT 1 8V 3A AGND is shorted with PGND at inner layers AGND ...

Страница 3: ...f EN pin BD9B305QUZ selects the operating status as Table1 shows Table1 EN pin settings EN pin voltage BD9B305QUZ status High 0 965V Enabled Low 0 830V Shutdown BOM used in EVK Below is the table of the bill of materials of EVK Table2 Part list 1 8V output voltage setting Symbol Category Part Number Manufacturer Value Size mm inch Condition L1 Inductor FDSD0420 H 1R0M MURATA 1 0μH 4242 1717 C1 C5 ...

Страница 4: ...d No 63UG064E Rev 002 Apr 2022 User s Guide BD9B305QUZ EVK 001 Board Layout EVK design information Figure 4 Top layer Top view Figure 6 Middle2 layer Top view Figure 7 Bottom layer Top view Figure 5 Middle1 layer Top view ...

Страница 5: ...regulation VIN 3 3V 5V VOUT 1 8V Figure 10 Output ripple voltage VIN 5V IOUT 0 1A Figure 11 Output ripple voltage VIN 5V IOUT 3A 50 55 60 65 70 75 80 85 90 95 100 0 001 0 01 0 1 1 10 Efficiency IOUT A VIN 3 3V VIN 5V 1 780 1 785 1 790 1 795 1 800 1 805 1 810 1 815 1 820 0 0 5 1 1 5 2 2 5 3 VOUT V IOUT A VIN 3 3V VIN 5V VOUT 20mV div VOUT 20mV div SW 2V div SW 2V div 2μs div 2μs div ...

Страница 6: ... 12 Transient response VIN 5V IOUT 0 1A to 1 0A Figure 13 Startup waveform VIN 5V IOUT No load Figure 14 Shutdown waveform VIN 5V IOUT No load VOUT 100mV div IOUT 500mA div 100μs div EN 3V div VIN 3V div VOUT 1V div PGD 5V div 400μs div EN 3V div VIN 3V div VOUT 1V div PGD 5V div 400μs div ...

Страница 7: ...aracteristics and select the ones with actual capacitance are equivalent For reference figure 15 shows the DC bias characteristics of MLASA168BB5476MRCA01 TAIYO YUDEN listed in the part list C7 Actual capacitance degrades to 50 from the nominal value of 47μF under the condition of 1 8V output DC bias voltage is 1 8V When selecting an alternative component select the product that has same capacitan...

Страница 8: ...evision History Date Revision Number Description 10th Aug 2020 001 Initial release 12th Apr 2022 002 p 3 Update part number of L1 and C6 in table 2 p 5 Update figure 8 9 10 11 p 6 Update figure 12 13 14 15 16 p 7 Add Products listed in the Part list and Selection of Ceramic Capacitors ...

Страница 9: ...uch technical information The Products specified in this document are not designed to be radiation tolerant For use of our Products in applications requiring a high degree of reliability as exemplified below please contact and consult with a ROHM representative transportation equipment i e cars ships trains primary communication equipment traffic lights fire crime prevention safety equipment medic...

Отзывы: