Diodes AP3003 - Manual (Page 7)

150kHz 3A BUCK DC-DC CONVERTER AP3003
Data Sheet
7
Aug. 2008 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Parameter Symbol Conditions Min Typ Max Unit
Feedback Bias Current I
FB
Adjustable Version Only,
V
FB
=1.3V
10 50
100
nA
Oscillator Frequency f
(Note 3) 127
110 150 173
173
kHz
Saturation Voltage V
SAT
I
LOAD
=3A ( No output devices,
V
FB
=0V)
1.2 1.5
1.6
V
Maximum Duty Cycle D
MAX
V
FB
=0V 100 %
Minimum Duty Cycle D
MIN
V
FB
=1.3V 0 %
Current Limit I
CL
Peak Current , No output
devices, V
FB
=0V
3.6
3.4 4.5 6.9
7.5
A
Output Leakage Current I
SWL
Output=0V, No output devices,
V
FB
=1.3V, V
IN
=32V
50
µA
Output=-1V, No output devices,
V
FB
=1.3V, V
IN
=32V
2 30 mA
Quiescent Current I
Q
V
FB
=1.3V 5 10 mA
Standby Quiescent Current I
STBY
ON/OFF Pin=5V, V
IN
=18V 80
200
250
µA
ON/OFF Pin Logic Input
Threshold Voltage
V
IL
Regulator ON 0.6
V
V
IH
Regulator OFF 2.0
ON/OFF Pin Input Current
I
H
V
PIN5
=2.5V (Regulator OFF) 5 15
µA
I
L
V
PIN5
=0.5V (Regulator ON) 0.02 5 µA
For All Output Voltage Versions
Unless otherwise specified , V
IN
=12V for 3.3V, 5V and adjustable version, V
IN
=24V for 12V version,
I
LOAD
=500mA, T
J
=25 o
C . Specifications with boldface type apply over Full Operating Junction Temperature
Range.
Electrical Characteristics (Continued)
Note 3: The switching frequency is reduced when the second stage current limit is activated.
Note 4: The specifications with boldface are GBD (Guaranteed By Design ).