IR3621FPBF International Rectifier, IR3621FPBF Datasheet - Page 22

• Manufacturer Part Number: IR3621FPBF
• Description: 2-Phase Dual Synchronous PWM Controller with Oscillator Synchronization and Pre-Bias Startup
• Manufacturer: International Rectifier

Specifications of IR3621FPBF

• Package: 28-Pin TSSOP
• Circuit: Dual Sync PWM Controller or 2Phase Single Output
• Vcc (min): 4.7
• Vcc (max): 16
• Vout (min): 0.8
• Vout (max): Vcc * 0.90
• Switch Freq (khz): programmable to 500kHz
• Pbf: PbF Option Available

IR3621 & (PbF)
TYPICAL OPERATING WAVEFORMS
Test Conditions:
V
=12V, V
=2.5V, I
=0-10A, V
=1.8V, I
=0-10A, Fs=400kHz, T
=Room Temp, No Air Flow
A
IN
OUT1
OUT1
OUT2
OUT2
Unless otherwise specified.
Figure 22 - Start up waveforms for 1.8V output
Figure 21 - Start up waveforms for 2.5V output
Ch1: Vin, Ch2: Vout3, Ch3: SS2, Ch4:Vo2 (1.8V)
Ch1: Vin, Ch2: Vout3, Ch3: SS1, Ch4:Vo1 (2.5V)
Figure 23 - Start up waveforms
Figure 24 - Vo1, Vo2 and PGood
Ch1: Vin, Ch2: Vout3, Ch3: Vref
Ch1: Vin, Ch2: Vo1, Ch3: Vo2, Ch4: PGood
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