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IR3870MBF Datasheet(PDF) 9 Page - International Rectifier

Part # IR3870MBF
Description  10A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
PDF  20 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3870MBF Datasheet(HTML) 9 Page - International Rectifier

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IR3870MBF
TYPICAL OPERATING WAVEFORM (25oC)
(Circuit of Figure 15, VCC = 3.3V, V5 = 5V, V
IN = 12.6V, F = 500kHz, Unless otherwise noted)
CH1: Vout (500mV/div); 500uS/div
CH2: PHASE (10V/div)
CH3: EN (2V/div) CH4: PGOOD (5V/div)
Figure 9: Shutdown/EN at I
OUT = 500mA
CH1: Vout (50mV/div); 20uS/div
CH2: Phase (10V/div)
Figure 10: Load Step (2A to 10A) Transient
(5A/us) at 12.6V
IN: 50mV overshoot, 25mV
undershoot
CH1: Vout (50mV/div); 20uS/div
CH2: PHASE (10V/div)
Figure 11: FCCM/CCM transition from 0.5A
to 5A at 12.6V
IN: 30mV overshoot, 15mV
undershoot
CH1: Vout (50mV/div); CH2: Phase (10V/div) CH4:
CPO (2V/div); Time: 2uS/div)
Figure 12: Charge Pump Off at I
OUT = 1A



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