Ap6508, New prod uc t, Electrical characteristics – Diodes AP6508 User Manual
Page 4
AP6508
500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER
AP6508
Document number: DS33437 Rev. 5 - 2
4 of 14
October 2011
© Diodes Incorporated
NEW PROD
UC
T
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
0
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
m
Ω
R
DS(ON)2
Low-Side Switch On-Resistance
(Note 6)
20
m
Ω
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
791 807 823 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
PG
Vth-Hi
Power Good Rising Threshold
0.9
V
FB
PG
Vth-Lo
Power Good Falling Threshold
0.7
V
FB
PG
TD
Power Good Delay
20
μs
V
PG
Power Good Sink Current Capability
0.4
V
I
PG_LEAK
Power Good Leakage Current
50
nA
I
SS
Soft-Start Current
10.5
μA
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
V
CC
Regulator
5
V
V
CC
Load Regulation
Icc=5mA
5
%
T
SD
Thermal Shutdown
140
°C
Note: 6. Guaranteed by design