IR3843AMTR1PBF International Rectifier, IR3843AMTR1PBF Datasheet - Page 25

• Manufacturer Part Number: IR3843AMTR1PBF
• Description: IC REG SYNC BUCK 3A 15-QFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck)r

Specifications of IR3843AMTR1PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.7 ~ 18.9 V
• Current - Output: 3A
• Frequency - Switching: 225kHz ~ 1.32MHz
• Voltage - Input: 1.5 ~ 21 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 15-PowerVQFN
• Power - Output: 682mW
• Part Status: Active
• Package: PQFN / 5 x 6
• Circuit: Single Output
• Iout (a): 3
• Switch Freq (khz): 250 - 1200
• Input Range (v): 1.5 - 21
• Output Range (v): 0.7 - 0.9*Vin
• Ocp Otp Uvlo Pre-bias Soft Start And: PGOOD + EN + SEQ
• Digital Home Media: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: IR3843AMTR1PBFTR

Rev 13.0
TYPICAL OPERATING WAVEFORMS
Vin=12.0V, Vcc=5V, Vo=1.8V, Io=0-3A, Room Temperature, No Air Flow
Ch
1
:V
Fig. 19. Start up with 1.62V Pre
Bias, 0A Load, Ch
Fig. 21. Inductor node at 3A load
Fig. 17. Start up at 3A Load
in
, Ch
2
:V
o
, Ch
Ch
3
1
:V
:LX
ss
2
:V
, Ch
o
, Ch
4
:Enable
3
:V
SS
Fig. 20. Output Voltage Ripple, 3A
Fig. 22. Short (Hiccup) Recovery
Ch
1
:V
Fig. 18. Start up at 3A Load,
in
, Ch
Ch
load Ch
2
2
:V
:V
o
o
IR3843AMPbF
, Ch
, Ch
2
3
: V
3
:V
:V
ss
o
SS
, Ch
4
:V
PD-97509
PGood
25