Diodes AP6503 - Manual (Page 4)

AP6503
Document number: DS35077 Rev. 5 - 2
4 of 15
www.diodes.com
January 2013
© Diodes Incorporated
AP6503
Electrical Characteristics
(V
IN
= 12V, T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Test Conditions Min Typ Max Unit
I
IN
Shutdown Supply Current V
EN
= 0V 0.3 3.0 µA
I
IN
Supply Current (Quiescent) V
EN
= 2.0V, V
FB
= 1.0V 0.6 1.5 mA
R
DS(ON)1
High-Side Switch On-Resistance (Note 8) 100 mΩ
R
DS(ON)2
Low-Side Switch On-Resistance (Note 8) 100 mΩ
I
Limit
HS Current Limit Minimum duty cycle 5.5 A
I
Limit
LS Current Limit From Drain to Source 0.9 A
High-Side Switch Leakage Current
V
EN
= 0V, V
SW
= 0V,
V
SW
=12V
0 10 μA
AVEA
Error Amplifier Voltage Gain
(Note 8)
800 V/V
GEA Error Amplifier Transconductance ΔI
C
= ±10µA 1000 µA/V
GCS
COMP to Current Sense
Transconductance
2.8 A/V
F
SW
Oscillator Frequency V
FB
= 0.75V 300 340 380 kHz
F
FB
Fold-back Frequency V
FB
= 0V 0.30 f
SW
D
MAX
Maximum Duty Cycle V
FB
= 800mV 90 %
T
ON
Minimum On Time 130 ns
V
FB
Feedback Voltage T
A
= -40°C to +85°C 900 925 950 mV
Feedback Overvoltage Threshold 1.1 V
V
EN_Rising
EN Rising Threshold 0.7 0.8 0.9 V
EN Lockout Threshold Voltage 2.2 2.5 2.7 V
EN Lockout Hysteresis 220 mV
INUV
Vth
V
IN
Under Voltage Threshold Rising 3.80 4.05 4.40 V
INUV
HYS
V
IN
Under Voltage Threshold Hysteresis 250 mV
Soft-Start Current V
SS
= 0V 6 μA
Soft-Start Period C
SS
= 0.1µF 15 ms
T
SD
Thermal Shutdown (Note 8) 160 °C
Note: 8. Guaranteed by design