IR3840MTR1PBF International Rectifier, IR3840MTR1PBF Datasheet - Page 24

• Manufacturer Part Number: IR3840MTR1PBF
• Description: IC REG SYNC SUPIRBUCK 12A 5X6QFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck)r

Specifications of IR3840MTR1PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.7 ~ 14.4 V
• Current - Output: 12A
• Frequency - Switching: 250kHz ~ 1.5MHz
• Voltage - Input: 1.5 ~ 16 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 15-PowerVQFN
• Power - Output: 2.6W
• Part Status: Active
• Package: PQFN / 5 x 6
• Circuit: Single Output
• Iout (a): 12
• Switch Freq (khz): 250 - 1500
• Input Range (v): 1.5 - 16
• Output Range (v): 0.7 - 0.9*Vin
• Ocp Otp Uvlo Pre-bias Soft Start And: PGOOD + EN + SEQ
• Server Storage: Yes
• Routers Switches: Yes
• Base Station Telecom: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: IR3840MTR1PBFTR

06/18/09
TYPICAL OPERATING WAVEFORMS
Vin=12.0V, Vcc=5V, Vo=1.8V, Io=0-12A, Room Temperature, No Air Flow
Fig. 21. Inductor node at 12A load
Fig. 19. Start up with 1.62V Pre
Bias, 0A Load, Ch
Fig. 17. Start up at 12A Load
Ch
1
:V
o
Ch
, Ch
4
Ch
:Enable
2
:V
3
:LX
in
, Ch
1
:V
o
, Ch
3
:V
ss
3
,
:V
SS
Fig. 20. Output Voltage Ripple, 12A
Ch
Fig. 22. Short (Hiccup) Recovery
1
Fig. 18. Start up at 12A Load,
:V
o
, Ch
Ch
load Ch
1
2
:V
:V
out
in
, Ch
, Ch
IR3840MPbF
2
: V
3
:V
3
:V
out
ss
SS
, Ch
4
:V
PGood
24