ACT4088 datasheet(5/12 Pages) ACTIVE-SEMI

Part #	ACT4088

Description	28V, 1.5A, 1.4MHz Step-Down DC/DC Converter in SOT23-6

PDF	12 Pages

Scroll/Zoom	100%

Manufacturer	ACTIVE-SEMI [Active-Semi, Inc]

Direct Link	http://www.active-semi.com

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5 / 12 page

ACT4088

Rev 2, 15-Nov-12

Innovative PowerTM

- 5 -

www.active-semi.com

TYPICAL PERFORMANCE CHARACTERISTICS CONT’D

(Circuit of Figure 2, VIN = 12V, L = 4.7µH, C1 = 10µF, C2 = 22µF, TA = +25°C, unless otherwise specified.)

CH1

CH2

Load Transient Response

CH1

CH2

Start-up Waveforms

CH1

CH2

Start-up Waveforms

CH1: VOUT, 50mV/div, (AC COUPLED)

CH2: VSW, 10V/div

CH3: IL, 500mA/div

TIME: 400ns/div

CH1

CH2

CH3

Steady State Switching Waveforms

CH1: VOUT, 100mV/div, (AC COUPLED)

CH2: IL, 1A/div

TIME: 1ms/div

CH1

CH2

Hiccup Mode Switching Waveforms

CH1

CH2

Load Transient Response

ILOAD = 200mA to 800mA

CH1: VOUT, 2V/div

CH2: VSW, 10V/div

CH3: IL, 1A/div

TIME: 200µs/div

CH1: VEN, 2V/div

CH2: VOUT, 2V/div

CH3: VSW, 10V/div

CH4: IL, 1A/div

TIME: 400µs/div

CH1: VOUT, 50mV/div

CH2: ILOAD, 500mA/div

TIME: 100µs/div

CH1: VOUT, 50mV/div

CH2: ILOAD, 500mA/div

TIME: 100µs/div

ILOAD = 200mA to 1.5A

ILOAD = 0mA

CH3

ILOAD = 1A

CH3

CH4

ILOAD = 1A

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