Diodes AP3581A/B/C - Manual (Page 6)

Data Sheet
Single Phase Synchronous Buck PWM Controller AP3581A/B/C
Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
6
Electrical Characteristics (Continued)
V
CC
=12V, T
A
=25ºC, unless otherwise specified.
Parameter Symbol Conditions Min Typ Max Unit
LGATE Falling to UGATE Rising
Delay V
LGATE
<1.2V to
(V
UGATE
-V
PHASE
)>1.2V
50 ns
Minimum Duty Cycle 0 %
Maximum Duty Cycle 75 80 85 %
REFERENCE VOLTAGE
AP3581A 0.591 0.6 0.609 V
Feedback Voltage V
FB
AP3581B/C 0.788 0.8 0.812 V
PROTECTION
Under Voltage Protection V
FB_UVP
0.3 0.4 0.5 V
Over Current Source I
OPS
30 40 50 µA
AP3581A 2.0
AP3581B 2.7 Soft-start Interval t
SS
AP3581C 3.6
ms
Enable Threshold V
COMP/EN
0.25 0.30 0.35 V
Thermal Shutdown T
OTSD
160 ºC
Thermal Shutdown Hysteresis T
HYS
20 ºC
Note 3: Not tested, guaranteed by design.
Typical Performance Characteristics
Figure 4. Line Regulation Figure 5. Load Regulation
4 5 6 7 8 9 10 11 12 13 14
-0.5
-0.4
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
V
OUT
=1.2V, I
OUT
=5A
Out
put
Voltage V
a
ria
tion (%)
Input Voltage (V)
0 2 4 6 8 10 12 14 16 18 20
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.0
0.1
0.2
V
IN
=12V,V
OUT
=1.2V
O
u
tpu
t
Voltage
Vari
ation
(%)
Output Current (A)