IR3856MTRPBF International Rectifier, IR3856MTRPBF Datasheet - Page 26

• Manufacturer Part Number: IR3856MTRPBF
• Description: IC BUCK SYNC ADJ 6A 17PQFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck)r

Specifications of IR3856MTRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.7 ~ 18.9 V
• Current - Output: 6A
• Frequency - Switching: 250kHz ~ 1.5MHz
• Voltage - Input: 1.5 ~ 21 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 17-PowerVQFN
• Power - Output: 1.11W
• Primary Input Voltage: 21V
• No. Of Outputs: 1
• Output Voltage: 18.9V
• Output Current: 6A
• No. Of Pins: 17
• Operating Temperature Range: -40°C To +125°C
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Part Status: Preferred
• Package: PQFN / 4 x 5
• Circuit: Single Output
• Iout (a): 6
• Switch Freq (khz): 250 - 1500
• 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 + OVP + SYNC
• Design Tool: Yes
• Server Storage: Yes
• Routers Switches: Yes
• Base Station Telecom: Yes
• Digital Home Media: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Rev2.0
TYPICAL OPERATING WAVEFORMS
Vin=12.0V, Vcc=5V, Vo=1.8V, Io=0-6A, Room Temperature, No Air Flow
Ch
1
Bias, 0A Load, Ch
Fig. 20: Start up with 1.62V Pre-
Fig. 22: Inductor node at 6A load
:V
Fig. 18: Start up at 6A Load
in
, Ch
Ch
2
:V
1
out
: Switch Node
, Ch
3
2
:V
:V
ss
out
, Ch
, Ch
4
:Enable
3
:V
SS
Ch
Fig. 21: Output Voltage Ripple, 6A
Fig. 23: Short (Hiccup) Recovery
1
:V
Fig. 19: Start up at 6A Load,
in
, Ch
Ch
load Ch
2
2
:V
:V
out
out
, Ch
, Ch
IR3856MPbF
1
: V
3
:V
3
out
:V
ss
ss
, Ch
4
PD-97528
:V
PGood
26