IP2021CPBF International Rectifier, IP2021CPBF Datasheet - Page 9

• Manufacturer Part Number: IP2021CPBF
• Description: IC PWR BLOCK SYNC BUCK LGA
• Manufacturer: International Rectifier
• Series: iPOWIR™r
• Type: Step-Down (Buck)r

Specifications of IP2021CPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 5 V
• Current - Output: 30A
• Frequency - Switching: 300kHz ~ 1MHz
• Voltage - Input: 8 ~ 14 V
• Operating Temperature: -10°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 12-LLGA
• Power - Output: 11.2W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Calculating SOA Temperature:
(Figure 3) SOA temperature adjustment for input voltage  -1.0ºC
(Figure 5) SOA temperature adjustment for output inductor  0.95ºC
(Figure 6) SOA temperature adjustment for switch frequency  -1.5ºC
T
Assuming T
adjusted for T
The SOA adjustment indicates the part is still allowed to run at a continuous current of 53.5A.
www.irf.com
X
axis intercept adjustment  -1.0ºC + 0.95ºC – 1.5ºC  -1.55ºC
1. Draw a line from Case Temperature axis to the PCB Temperature axis.
2. Draw a vertical line from the T
3. Draw a horizontal line from the intersection of the vertical line with the SOA curve to the Y-axis
4. Draw a new vertical line from the T
5. Draw a horizontal line from the intersection of the new vertical line with the SOA curve to the
(Output Current).
continuous current.
temperature from the original T
Y-axis (Output Current). The point at which the horizontal line meets the Y-axis is the new
SOA continuous current.
PCB
X
decrease of 4.5ºC.
= 90ºC & T
64
60
56
52
48
44
40
36
32
28
24
20
16
12
8
4
0
0
0
F
L
V
SW
O
V
O
10
10
I
= 325nH
Safe Operating Area
= 12V
= 1MHz
= 1.3V
The point at which the horizontal line meets the Y-axis is the SOA
CASE
20
20
30
= 110ºC, the following example shows how the SOA current is
30
X
X
40
40
axis intercept to the SOA curve.
intercept point.
PCB Temperature (ºC)
Case Temperature (ºC)
50
50
8/13/2009
X
60
60
axis by adding or subtracting the SOA adjustment
70
70
(3)
(5)
80
80
90
90
(4)
100 110 120 130
100
(1)
(2)
110
iP2021CPbF
120
130
Tx
PD-97414
9