BD9E302EFJ Datasheet, PDF (15/44 Pages) Rohm – Integrated MOSFET Single Synchronous Buck DC/DC Converter

BD9E302EFJ
Datasheet
 Function Description
1) DC/DC converter operation
BD9E302EFJ is a synchronous rectifying step-down switching regulator that achieves faster transient response by
employing current mode PWM control system. It utilizes switching operation in PWM (Pulse Width Modulation) mode
for heavier load, while it utilizes SLLM (Simple Light Load Mode) control for lighter load to improve efficiency.
① SLLM^TM control
② PWM control
①SLLM^TM control
VOUT =100mV/div
SW=5V/div
Output current IOUT[A]
Figure 32. Efficiency (SLLM^TM control and PWM control)
Time=4µs/div
②PWM control
VOUT =50mV/div
SW=5V/div
Time=4µs/div
Figure 33. SW Waveform (①SLLM^TM control)
(VIN = 12V, VOUT = 5.0V, IOUT = 50mA)
Figure 34. SW Waveform (②PWM control)
(VIN = 12V, VOUT = 5.0V, IOUT = 3A)
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27.Apr.2016 Rev.002