AP1509
150KHz, 2A PWM BUCK DC/DC CONVERTER
AP1509
Document number: DS31016 Rev. 4 - 2
7 of 13
www.diodes.com
June 2010
© Diodes Incorporated
Typical Performance Characteristics
AP1509 Efficiency vs. Temperature
(V
IN
=12V, V
OUT
=5V, Io=2A)
75
76
77
78
79
80
81
82
83
84
85
86
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (T
A
) (°C)
Efficiency (%)
AP1509 Efficiency vs. Temperature
(V
IN
=12V, V
OUT
=3.3V, Io=2A)
73
74
75
76
77
78
79
80
81
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (T
A
) (°C)
Efficiency (%)
AP1509 Saturation Voltage vs. Temperature
(V
IN
=12V, V
FB
=0V, VSD=0)
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
-50 -25 0 25 50 75 100 125
Temperature (TA)
(°C)
Saturation Voltage (V)
2A
1A
0.5A
AP1509 Switch Current Limit vs. Temperature
(V
IN
=12V, V
FB
=0V)
3
3.5
4
4.5
5
5.5
-50-30-101030507090
Temperature (TA) (°C)
Switch Current Limit (A)
AP1509 Supply Current vs. Temperature
(V
IN
=12V, No Load, Von/off =0V(Switch ON) ,Von/off =5V(Switch OFF))
5
6
7
8
9
10
11
12
13
14
15
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
Supply Current (mA)
Switch ON
30
35
40
45
50
55
60
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
Supply Current (uA)
Switch OFF
