Manual

AP6507
500 kHz 18V 3A SYNCHRONOUS DC/DC BUCK CONVERTER
AP6507
Document number: DS33435 Rev. 3 - 2
4 of 13
www.diodes.com
October 2011
© Diodes Incorporated
NEW PRODUCT
Electrical Characteristics (V
IN
= 12V, T
A
= +25°C, unless otherwise noted)
Symbol Parameter Test Conditions Min Typ. Max Unit
I
IN
Shutdown Supply Current
V
EN
= 0V
15 µA
I
IN
Supply Current (Quiescent)
V
EN
= 2.0V, V
FB
= 1.0V
1.2 mA
R
DS(ON)1
High-Side Switch On-Resistance
(Note 6)
120 mΩ
R
DS(ON)2
Low-Side Switch On-Resistance
(Note 6)
20 mΩ
SW
LKG
Switch Leakage Current
V
EN
= 0V, V
SW
= 0V
0 10 µA
I
Limit
Current Limit 5.8 A
F
SW
Oscillator Frequency
V
FB
= 0.75V
350 500 650 kHz
F
FB
Fold-back Frequency
V
FB
= 300mV
0.3
f
SW
D
MAX
Maximum Duty Cycle
V
FB
= 700mV
80 85 %
V
FB
Feedback Voltage
T
A
= -40°C to +85°C
788 808 828 mV
I
FB
Feedback Current
V
FB
= 800mV
10 50 nA
V
EN_Rising
EN Rising Threshold 1.1 1.3 1.5 V
V
EN_HYS
EN Threshold Hysteresis 0.4 V
I
EN
EN Input Current
V
EN
= 2V
2
μA
V
EN
= 0V
0
EN
TD-Off
EN Turn Off Delay (Note 6) 5 μs
INUV
Vth
V
IN
Under Voltage Threshold Rising
4.0 4.2 4.4 V
INUV
HYS
V
IN
Under Voltage Threshold
Hysteresis
200 mV
V
CC
VCC Regulator 5 V
VCC Load Regulation Icc=5mA 5 %
Soft-Start Period 2 ms
T
SD
Thermal Shutdown 140 °C
Note: 6. Guaranteed by design