BD9A300MUV
1. Function Explanations
(1) DC/DC converter operation
BD9A300MUV 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) SLLMTM Control
(2) PWM Control
Output current IOUT [A]
Figure 41. Efficiency (SLLMTM Control and PWM Control)
SLLMTM Control
②PWM Control
①
VOUT= 50mV/div
VOUT= 50mV/div
Time= 5µs/div
Time= 5µs/div
SW= 2V/div
SW= 2V/div
Figure 42. SW Waveform(SLLMTM Control)
(VIN= 5.0V, VOUT= 1.8V, IOUT= 50mA)
Figure 43. SW Waveform (PWM Control)
(VIN= 5.0V, VOUT= 1.8V, IOUT= 1A)
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TSZ02201-0J3J0AJ00350-1-2
30.Jun.2017 Rev.003
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