IR3897 IRF [International Rectifier], IR3897 Datasheet - Page 39

• Manufacturer Part Number: IR3897
• Description: 4A HIGHLY INTEGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

TYPICAL OPERATING WAVEFORMS
Vin = 12V, Vo = 1.2V, Iout = 0‐4A, Room Temperature, No Air Flow
800KHz from free running 600KHz , Ch
Figure 43: Feed Forward for Vin change from 7 to16V
and back to 7V, Ch
Figure 45: External Frequency Synchronization to
Figure 47: Voltage Margining using Vref pin
Ch2‐Vo,Ch3‐Vref,Ch4‐PGood
39
AUGUST 08, 2012 |DATA SHEET | Rev 3.3
2
:V
o
, Ch
1
:LX, Ch
Single‐Input Voltage, Synchronous Buck Regulator
4
:Vin
2
:Vo,Ch4‐Rt/Sync Ch2‐Vo,Ch3‐PGood
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4A Highly Integrated SupIRBuck
Figure 44: Start/Stop using S‐Ctrl pin,
Ch
48: Voltage tracking using Vp pin
Ch2‐Vo,Ch3‐Vp,Ch4‐PGood
Figure 46: Over Voltage protection,
1
:Enable, Ch
2
:V
o
, Ch
TM
3
:pGood, Ch
IR3897
4
:S‐Ctrl
PD‐97663