AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
AP1506
Document number: DS31015 Rev. 7 - 2
5 of 14
www.diodes.com
June 2010
© Diodes Incorporated
Electrical Characteristics (All Output Voltage Versions)
Unless otherwise specified, V
IN
= 12V for 3.3V, 5V, adjustable version and V
IN
= 18V for the 12V version. I
LOAD
= 0.5A
Specifications with boldface type are for full operating temperature range, the other type are for T
J
= 25ºC.
Symbol Parameter Conditions Min Typ. Max Unit
I
FB
Feedback Bias Current
V
FB
= 1.3V
(Adjustable version only)
- -10
-50
nA
-100
F
OSC
Oscillator Frequency
127 150 173
KHz
110
-
173
F
SCP
Oscillator Frequency of
Short Circuit Protect
When current limit occurred
and V
FB
< 0.5V, T
a
= 25
o
C
10 30 50 KHz
V
SAT
Saturation Voltage
I
OUT
= 3A
No outside circuit
V
FB
= 0V force driver on
- 1.4
1.6
V
1.7
DC
Max. Duty Cycle (ON) V
FB
= 0V force driver on - 100 -
%
Min. Duty Cycle (OFF) V
FB
= 12V force driver off - 0 -
I
CL
Current Limit
Peak current
No outside circuit
V
FB
= 0 force driver on
3.6 4.5
5.5
A
6.5
I
L
Output = 0V
Output
Leakage
Current
No outside circuit
V
FB
= 12 force driver off
- - -200
µA
Output = -1V V
IN
= 22V - -5 - mA
I
Q
Quiescent Current V
FB
= 12 force driver off - 5 10 mA
I
STBY
Standby Quiescent
Current
ON/OFF pin = 5V
V
IN
= 22V
- 70
150
µA
200
V
IL
ON/OFF Pin Logic Input
Threshold Voltage
Low (regulator ON) -
1.3
0.6
V
V
IH
High (regulator OFF) 2.0 -
I
H
ON/OFF Pin Logic
Input Current
V
LOGIC
= 2.5V (OFF) - - -0.01
µA
I
L
ON/OFF Pin Input
Current
V
LOGIC
= 0.5V (ON) - -0.1 -1
θ
JA
Thermal Resistance
Junction to Ambient
TO263-5L (Note 3) 37 -
o
C/W
TO220-5L(R) (Note 3) 31 -
θ
JC
Thermal Resistance
Junction to Case
TO263-5L (Note 3) 6 -
o
C/W
TO220-5L(R) (Note 3) 5 -
Notes: 3. Test condition: Device mounted with copper area of approximately 3 in
2
,
no air flow.
