AP1512/A
50KHz, 2A/3A PWM BUCK DC/DC CONVERTER
AP1512/A Rev. 4 4 of 12 MAY 2008
www.diodes.com © Diodes Incorporated
Electrical Characteristics (All Output Voltage Versions)
Unless otherwise specified, V
IN
= 30V for all version. I
LOAD
= 0.5A
Specifications with boldface type are for full operating temperature range, the other type are for T
A
= 25ºC.
Symbol Parameter Conditions Min Typ. Max Unit
8
I
B
Feedback Bias Current
V
FB
= 1.3V
(Adjustable version only)
5
10
μA
42.5 50 57.5
F
OSC
Oscillator Frequency
40
60
KHz
1.4
V
SAT
Saturation Voltage
I
OUT
= 2A
no outside circuit
V
FB
= 0V force driver on
1.3
1.5
V
Max. Duty Cycle(ON) V
FB
= 0V force driver on 100
DC
Min. Duty cycle(OFF) V
FB
= 12V force driver off 0
%
4.5
I
CL
Current Limit for AP1512
peak current
no outside circuit
V
FB
= 0V force driver on
2.5 3
5.5
A
5
I
CL
Current Limit for AP1512A
peak current
no outside circuit
V
FB
= 0V force driver on
3.2 4
6
A
Output = 0
no outside circuit
V
FB
= 12V force driver off
-250 uA
I
L
Output = -1
Output
leakage
current
V
IN
= 60V -2 -60 mA
I
Q
Quiescent Current V
FB
= 12V force driver off 5 10 mA
450
500
I
STBY
Standby Quiescent
Current
ON/OFF pin = 5V
V
IN
= 60V
350
uA
V
IL
Low (regulator ON) - 0.6
V
IH
ON/OFF pin logic input
threshold voltage
High (regulator OFF) 2.0
1.3
-
V
I
H
ON/OFF pin logic
input current
V
LOGIC
= 2.5V (OFF) 0 -5
I
L
ON/OFF pin input current V
LOGIC
= 0.5V (ON) -0.8 -10
uA
2.5
θ
JC
Thermal Resistance TO263-5L Junction to case
3.5
o
C/W
28
θ
JA
Thermal Resistance
With copper area of
approximately 3 in
2
TO263-5L Junction to ambient
23
o
C/W
