ACT4082A
Active- Semi
Rev0, 16-May-08
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Circuit of Figure 2, VIN = 12V, L = 4.7µH, C1 = 10µF, C2 = 22µF, TA = +25°C, unless otherwise specified.)
Load Transient Response
Load Transient Response
ILOAD = 200mA to 1.2A
ILOAD = 200mA to 800mA
CH1
CH1
CH2
CH2
CH1: VOUT, 50mV/div
CH2: ILOAD, 500mA/div
TIME: 100µs/div
CH1: VOUT, 50mV/div
CH2: ILOAD, 500mA/div
TIME: 100µs/div
Start-up Waveforms
Start-up Waveforms
ILOAD = 0mA
ILOAD = 1A
CH1
CH2
CH1
CH2
CH3
CH3
CH4
CH1: VOUT, 2V/div
CH2: VSW, 10V/div
CH3: IL, 1A/div
CH1: VEN, 2V/div
CH2: VOUT, 2V/div
CH3: VSW, 10V/div
CH4: IL, 1A/div
TIME: 200µs/div
TIME: 400µs/div
Steady State Switching Waveforms
Hiccup Mode Switching Waveforms
ILOAD = 1A
CH1
CH1
CH2
CH3
CH2
CH1: VOUT, 100mV/div, (AC COUPLED)
CH2: IL, 1A/div
CH1: VOUT, 50mV/div, (AC COUPLED)
CH2: VSW, 10V/div
TIME: 1ms/div
CH3: IL, 500mA/div
TIME: 400ns/div
Innovative PowerTM
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