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| AP6503 Datasheet, PDF (4/13 Pages) Diodes Incorporated – 340kHz 23V 3A SYNCHRONOUS DC/DC BUCK CONVERTER | |||
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AP6503
340kHz 23V 3A SYNCHRONOUS DC/DC BUCK CONVERTER
Electrical Characteristics (VIN = 12V, TA = +25°C, unless otherwise noted)
Symbol
IIN
IIN
RDS(ON)1
RDS(ON)2
ILimit
ILimit
AVEA
GEA
GCS
FSW
FFB
DMAX
TON
VFB
Parameter
Shutdown Supply Current
Supply Current (Quiescent)
High-Side Switch On-Resistance
(Note 6)
Low-Side Switch On-Resistance
(Note 6)
HS Current Limit
LS Current Limit
High-Side Switch Leakage Current
Error Amplifier Voltage Gain (Note 5)
Error Amplifier Transconductance
COMP to Current Sense
Transconductance
Oscillator Frequency
Fold-back Frequency
Maximum Duty Cycle
Minimum On Time
Feedback Voltage
Feedback Overvoltage Threshold
Test Conditions
VEN = 0V
VEN = 2.0V, VFB = 1.0V
Minimum duty cycle
From Drain to Source
VEN = 0V, VSW = 0V,
Vsw=12V
ÎIC = ±10μA
VFB = 0.75V
VFB = 0V
VFB = 800mV
TA = -40°C to +85°C
VEN_Rising EN Rising Threshold
EN Lockout Threshold Voltage
EN Lockout Hysteresis
INUVVth
INUVHYS
VIN Under Voltage Threshold Rising
VIN Under Voltage Threshold
Hysteresis
Soft-Start Current
Soft-Start Period
TSD
Thermal Shutdown
Note: 6. Guaranteed by design
VSS = 0V
CSS = 0.1µF
Min Typ. Max Unit
0.3
3.0
µA
0.6
1.5
mA
100
mâ¦
100
mâ¦
5.5
A
0.9
A
0
10
μA
800
1000
V/V
uA/V
2.8
A/V
300
340
380 kHz
0.30
fSW
90
%
200
ns
900
925
950 mV
1.1
V
0.7
0.8
0.9
V
2.2
2.5
2.7
V
220
mV
3.80 4.05 4.40
V
250
mV
6
μA
15
ms
150
°C
AP6503
Document number: DS35077 Rev. 1 - 2
4 of 13
www.diodes.com
September 2011
© Diodes Incorporated
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