aoz1025di Alpha & Omega Semiconductor, aoz1025di Datasheet - Page 5

• Manufacturer Part Number: aoz1025di
• Description: Ezbucktm 8a Synchronous Buck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Maximum Output Current
Maximum output current of buck converters such as AOZ1025D is related with driving capability and thermal condition.
AOZ1025D’s driving voltage varies with the input voltage. When input voltage is higher than 6.5V, the driver inside the
AOZ1025D can drive both high side and low side MOSFETs to deliver 8A output current; but when the input voltage is
5V, the recommended maximum output current is de-rated to 6A.
The output voltage within a fixed input voltage directed determines the turn-on ratio of integrated PMOS, and thus the
thermal condition of AOZ1025D during the operation. The following diagrams show the safe operation region of
AOZ1025 operating at V
Input Voltage Vs. Maximum Output Current
AOZ1025D’s driving voltage varies with the input voltage.þWhen input voltage is higher than 6.5V, the driver inside the
AOZ1025D can drive both high side and low side MOSFETs to deliver 8A output current; but when the input voltage is
5V, the recommended maximum output current is de-rated to 6A.þThe following diagram shows relations of the input
voltage and the maximum output current of AOZ1025D.
Rev. 1.3 September 2009
9
8
7
6
5
4
3
2
1
0
0.8
1.3
V
IN
1.8
= 12V Safe Operation Region
2.3
Output Voltage (V)
IN
2.8
= 5V, and V
3.3
9
8
7
6
5
4
3
2
5
3.8
IN
6
Input Voltage vs. Maximum Output Current
= 12V respectively.
4.3
7
4.8
8
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5.3
9
Voltage (V)
10
11
7
6
5
4
3
2
1
0
0.8
12
13
1.3
V
IN
14
= 5V Safe Operation Region
1.8
15
Output Voltage (V)
16
2.3
2.8
AOZ1025D
3.3
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3.8