background image

 

7/9

 

© 2020 ROHM Co., Ltd.

 

 

No. 63UG041E Rev.001

 
 

AUG.2020

 
 

User’s Guide 

BD9B304QWZ-EVK-001 

 

 

 

Figure 10. Switching Waveform 

(V

VIN

=5.0V, V

OUT

=1.2V, V

MODE

=0V, I

OUT

=0.2A) 

 

 

 

 

Figure 11. Switching Waveform 

(V

VIN

=5.0V, V

OUT

=1.2V, V

MODE

= V

VIN

, I

OUT

=3.0A)

 

 

 

Figure 12. Load Response (I

OUT

=0.1A-3A)   

(V

VIN

=5.0V, V

OUT

=1.2V, V

MODE

=0V, C

OUT

=22

μ

Fx2)

 

 

 

 

Figure 13. Load Response (I

OUT

=0A-3A) 

(V

VIN

=5.0V, V

OUT

=1.2V, V

MODE

=V

VIN

, C

OUT

=22

μ

Fx2)

 

 

 

 

VOUT(AC) 20mV/div

 

VSW 2V/div

 

Time 1

μ

s/div

 

VOUT(AC) 20mV/div

 

VSW 2V/div

 

Time 1

μ

s/div

 

VOUT(AC) 100mV/div

 

IOUT 1A/div

 

Time 1ms/div

 

Time 1ms/div

 

VOUT(AC) 100mV/div

 

IOUT 1A/div

 

Summary of Contents for BD9B304QWZ

Page 1: ...is 1 0MHz 2 0MHz selectable It adopts a Deep SLLM compliant fixed on time control method that consumes low current at light loads making it ideal for equipment that wants to reduce standby power cons...

Page 2: ...2020 User s Guide BD9B304QWZ EVK 001 EVK Overview Figure 1 BD9B304QWZ EVK 001 Top View A 3 points switch implements on either SW_MODE and SW_IN on actual EVK EVK Schematic Figure 2 BD9B304QWZ EVK 001...

Page 3: ...ad to the EVK s VOUT and GND terminals When using an electronic load connect with the load turned off 4 Connect a voltmeter to the EVK s VOUT and GND terminals 5 Connect the EN to the VIN terminal of...

Page 4: ...tween Deep SLLM and PWM Parts list Table 3 Parts list Part No Value Manufacturer Model number Size Unit mm inch IC U1 ROHM BD9B304QWZ 2 00 x 2 00 Inductor L1 1 0 H MURATA FDSD0420 H 1R0M 4 20 x 4 20 C...

Page 5: ...information Number of Layers Material Board Size Copper Thickness 4 FR 4 50mm x 40mm x 1 6mmt 1oz 35 m The layout of BD9B304QWZ EVK 001 is shown below Figure 3 Top Layer Layout Top View Figure 4 Midd...

Page 6: ...ser s Guide BD9B304QWZ EVK 001 Reference application data Figure 7 Efficiency vs Load Current VVIN 5 0V VOUT 1 2V L 1 0 H Figure 8 Line Regulation VOUT 1 2V IOUT 3A Figure 9 Load Regulation VVIN 5 0V...

Page 7: ...veform VVIN 5 0V VOUT 1 2V VMODE VVIN IOUT 3 0A Figure 12 Load Response IOUT 0 1A 3A VVIN 5 0V VOUT 1 2V VMODE 0V COUT 22 Fx2 Figure 13 Load Response IOUT 0A 3A VVIN 5 0V VOUT 1 2V VMODE VVIN COUT 22...

Page 8: ...VFREQ VVIN RLOAD 0 4 Figure 16 Boot by VIN VIN 0V 5V VOUT 1 2V VFREQ VVIN RLOAD 0 4 Figure 17 Shutdown by VIN VIN 5V 0V VOUT 1 2V VFREQ VVIN RLOAD 0 4 Time 1ms div VOUT 1V div VEN 5V div VVIN 5V div V...

Page 9: ...9 9 2020 ROHM Co Ltd No 63UG041E Rev 001 AUG 2020 User s Guide BD9B304QWZ EVK 001 Revision History Date Revision Number Description 27 AUG 2020 001 Initial release...

Page 10: ...hnical 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...

Reviews: