IR3870MTR1PBF International Rectifier, IR3870MTR1PBF Datasheet - Page 7

• 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

Figure 2. Switching Frequency Vs Output Current
Figure 1. Feedforward Resistance Vs Switching
TYPICAL OPERATING DATA (25
(Circuit of Figure 15, VCC = 3.3V, V5 = 5V, V
500
450
400
350
300
250
200
150
100
50
0
Rff 0.5 fsw
Rff 0.5 fsw
Rff 1 fsw
Rff 1 fsw
Rff 1.5 fsw
Rff 1.5 fsw
Rff 2 fsw
Rff 2 fsw
Rff 2.5 fsw
Rff 2.5 fsw
Rff 3 fsw
Rff 3 fsw
Rff 3.5 fsw
Rff 3.5 fsw
Rff 4 fsw
Rff 4 fsw
Rff 4.5 fsw
Rff 4.5 fsw
Rff 5 fsw
Rff 5 fsw
0
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
1000000
1000000
1000
1000
,
,
,
,
,
,
,
,
,
,
000000
000000
,
,
,
,
,
,
,
,
,
,
)
)
)
)
)
)
)
)
)
)
200
200
0
0
)
)
)
)
)
)
)
)
)
)
200000
200000
Frequency: 0.5V V
V
V
OUT
OUT
2
= 0.5V
= 0.5V
Switching Frequency (KHz)
Switching Frequency (KHz)
4
Output Current (A)
Switching Frequency
Switching Frequency
V
V
OUT
OUT
fsw
fsw
= 5V
= 5V
6
OUT
step
8
1000000
1000000
1000
1000
10
IN
o
= 12.6V, F = 500kHz Unless otherwise noted)
C)
12
336
334
332
330
328
326
324
322
314.5
313.5
312.5
311.5
315
314
313
312
311
0
0
V
V
Figure 3. On-Time Variation in DCM:
Figure 4. On-Time Variation in CCM:
IN
IN
= 12V, V
= 12V, V
25
25
OUT
OUT
Temperature (C)
50
Temperature (C)
50
=1.1V, RFF = 180kOhm
=1.1V, RFF = 180kOhm
IR3870MBF
75
75
100
100
7
125
125