IR3870MTR1PBF International Rectifier, IR3870MTR1PBF Datasheet - Page 9

• Manufacturer Part Number: IR3870MTR1PBF
• Description: IC BUCK SYNC ADJ 10A PQFN56
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck)r

Specifications of IR3870MTR1PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 ~ 12 V
• Current - Output: 10A
• Frequency - Switching: 200kHz ~ 1MHz
• Voltage - Input: 3 ~ 26 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 17-PowerVQFN
• Part Status: Active
• Package: PQFN / 5 x 6
• Circuit: Single Output
• Iout (a): 10
• Switch Freq (khz): 0 - 1000
• Input Range (v): 3.0 - 26
• Output Range (v): 0.5 - 12
• Ocp Otp Uvlo Pre-bias Soft Start And: Constant On-Time + OVP no OTP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: IR3870MTR1PBFTR

TYPICAL OPERATING WAVEFORM (25
(Circuit of Figure 15, VCC = 3.3V, V5 = 5V, V
CH1: Vout (50mV/div); 20uS/div
CH2: Phase (10V/div)
Figure 10: Load Step (2A to 10A) Transient
(5A/us) at 12.6V
undershoot
Figure 9: Shutdown/EN at I
CH1: Vout (500mV/div); 500uS/div
CH2: PHASE (10V/div)
CH3: EN (2V/div) CH4: PGOOD (5V/div)
IN
: 50mV overshoot, 25mV
OUT
= 500mA
IN
= 12.6V, F = 500kHz, Unless otherwise noted)
CH1: Vout (50mV/div); 20uS/div
CH2: PHASE (10V/div)
Figure 11: FCCM/CCM transition from 0.5A
to 5A at 12.6V
undershoot
CH1: Vout (50mV/div); CH2: Phase (10V/div) CH4:
CPO (2V/div); Time: 2uS/div)
Figure 12: Charge Pump Off at I
o
C)
IN
: 30mV overshoot, 15mV
IR3870MBF
OUT
= 1A
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