bd9153muv ROHM Co. Ltd., bd9153muv Datasheet - Page 6

• Manufacturer Part Number: bd9153muv
• Description: Output 1.5a Or Less High Efficiency Step-down Switching Regulator With Built-in Power Mosfet
• Manufacturer: ROHM Co. Ltd.

●Information on advantages
© 2009 ROHM Co., Ltd. All rights reserved.
BD9153MUV
www.rohm.com
Advantage 1：Offers fast transient response with current mode control system.
BD9153MUV (Load response I
Advantage 2： Offers high efficiency for all load range.
VOUT1
・For lighter load:
・For heavier load:
Utilizes the current mode control mode called SLLM for lighter load, which reduces various dissipation such as switching
dissipation (P
dissipation (P
Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs incorporated as power transistor.
Offers high efficiency for all load range with the improvements mentioned above.
Io1
ON resistance of Highside MOS FET : 170mΩ(Typ.)
ON resistance of Lowside MOS FET : 130mΩ(Typ.)
SW
RON
), gate charge/discharge dissipation, ESR dissipation of output capacitor (P
) that may otherwise cause degradation in efficiency for lighter load.
O
=0.5A→1.5A / usec)
Achieves efficiency improvement for lighter load.
Achieves efficiency improvement for heavier load.
Fig.26
6/18
VOUT1
Io1
BD9153MUV (Load response I
100
50
0
0.001
ESR
①
①inprovement by SLLM system
②improvement by synchronous rectifier
Fig.27 Efficiency
) and on-resistance
SLLM
O
Output current Io[A]
=1.5A→0.5A / usec)
PWM
0.01
Technical Note
2009.08 - Rev.A
TM
0.1
②
1