Diodes AP3512E - Manual (Page 6)

Preliminary Datasheet
18V, 2A Synchronous DC-DC Buck Converter AP3512E
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
6
Electrical Characteristics (Continued)
V
IN
=V
EN
=12V, V
OUT
=3.3V, T
A
=25ºC, unless otherwise specified.
Parameter Symbol Conditions Min Typ Max Unit
Max. Duty Cycle D
MAX
V
FB
=0.85V 90 %
Min. Duty Cycle D
MIN
V
FB
=1V 0 %
ERROR AMPLIFIER
Error Amplifier Voltage Gain
(Note 2)
A
EA
400 V/V
Error Amplifier Transconductance G
EA
800 μA/V
COMP to Current Sense
Transconductance
G
CS
5.2 A/V
THERMAL SHUTDOWN
Thermal Shutdown (Note 2) T
OTSD
160 ºC
Thermal Shutdown Hysteresis
(Note 2)
T
HYS
30 ºC
SOFT START (SS PIN)
Soft-start Time (Note 2) t
SS
C
SS
=0.1μF 15 ms
Soft-start Current 5 μA
Note 2: Not tested, guaranteed by design.
Note 3: R
DSON
=
SW2 SW1
SW2 SW1
I - I
V - V