ame5268 AME, Inc., ame5268 Datasheet - Page 9

• Manufacturer Part Number: ame5268
• Description: 3a, 28v, 340khz Synchronous Rectified Step-down Converter
• Manufacturer: AME, Inc.

n Electrical Specifications
Rev. A.01
AME5268
V
IN
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
= 12V, T
A
= 25
AME
Parameter
O
C, unless otherwise noted.
V
R
R
Symbol
f
UVLO,HYST
OSC,SCR
f
t
DS,ON,LO
DS,ON,HI
V
I
OSC,CL
I
ON,MIN
D
SW,LK
SHDN
G
G
V
A
V
UVLO
I
t
MAX
SS
SS
FB
EA
EA
CS
EN
i e
C
V
From Drain to Source
Minimum Duty Cycle
V
V
-40
-40
-40
4.75V <= V
EN
IN
EN
Test Condition
O
O
O
rising, T
= 3V, V
C<=T
C<=T
C
C<=T
= 0V, V
Rectified Step-Down Converter
T
T
V
IC = ±10µA
3A, 28V, 340KHz Synchronous
V
V
V
SS
A
A
FB
EN
FB
SS
= 25
= 25
= 0.1µF
=0.8V
A
A
A
= 0V
= 0V
= 0V
<=+85
<=+85
<=+85
FB
A
IN
SW
O
O
= 25
<=28V
C
C
= 1.2V
= 0V
O
O
O
O
C
C
C
C
0.90
Min
550
300
270
3.8
3.5
2.2
2.2
4
0.925
1.10
1.25
4.05
Typ
400
800
135
105
340
116
220
210
1.3
5.8
5.2
2.5
90
15
1
6
1100
Max
0.95
380
400
3.0
1.5
4.3
4.7
2.7
2.7
10
Units
µA/V
KHz
KHz
KHz
V/V
m
m
A/V
mA
mV
mS
µA
µA
nS
µA
%
V
V
A
A
V
V
V
V
9