AME
AME5268
n
Electrical Specifications
V
IN
= 12V, T
A
= 25
O
C, unless otherwise noted.
Parameter
Shutdown Current
Supply Current
Feedback Voltage
OVP Threshold Voltage
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-side Switch On Resistance
Low-side Switch On Resistance
Switch Leakage Current
High-side Switch Current Limit
Low-side Switch Current Limit
COMP to Current Sense
Transconductance
Current Limit Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time
Input Undervoltage Lockout
Input Undervoltage Lockout
Hysteresis
Soft-Start Current Source
Soft-Start Period
EN Lockout Threshold Voltage
G
CS
f
OSC,CL
f
OSC,SCR
D
MAX
t
ON,MIN
V
UVLO
V
UVLO,HYST
I
SS
t
SS
V
EN
A
EA
G
EA
R
DS,ON,HI
R
DS,ON,LO
I
SW,LK
V
FB
Symbol
I
SHDN
3A, 28V, 340KHz Synchronous
Rectified Step-Down Converter
Test Condition
V
EN
= 0V
V
EN
= 3V, V
FB
= 1.2V
4.75V <= V
IN
<=28V
Min
Typ
1
1.3
Max
3.0
1.5
0.95
Units
µA
mA
V
V
V/V
µA/V
mΩ
mΩ
0.90
0.925
1.10
400
∆IC
= ±10µA
800
135
105
V
EN
= 0V, V
SW
= 0V
Minimum Duty Cycle
From Drain to Source
4
5.8
1.25
5.2
T
A
= 25
O
C
-40
O
C<=T
A
<=+85
O
C
C
V
FB
= 0V
300
270
116
90
220
V
IN
rising, T
A
= 25
O
C
-40
O
C<=T
A
<=+85
O
C
3.8
3.5
210
V
SS
= 0V
C
SS
= 0.1µF
T
A
= 25
O
C
-40
O
C<=T
A
<=+85
O
C
2.2
2.2
6
15
2.5
4.05
340
10
µA
A
A
A/V
380
400
KHz
KHz
KHz
%
nS
ie
V
FB
=0.8V
4.3
4.7
V
V
mV
µA
mS
2.7
2.7
V
V
Rev.B.01
9
AME [ ANALOG MICROELECTRONICS ]
